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    SEC Form N-CSRS filed by Eaton Vance Senior Income Trust

    2/27/25 1:33:33 PM ET
    $EVF
    Investment Bankers/Brokers/Service
    Finance
    Get the next $EVF alert in real time by email
    Eaton Vance Senior Income Trust
    The shares of the Fund often trade at a discount or premium to their net asset value. The discount or premium may vary over time and may be higher or lower than what is quoted in this report. For up-to-date premium/discount information, please refer to https://funds.eatonvance.com/closed-end-fund-prices.php. 0001070732 false N-CSRS 0001070732 2024-07-01 2024-12-31 0001070732 2019-07-01 2020-06-30 0001070732 2020-07-01 2021-06-30 0001070732 2021-07-01 2022-06-30 0001070732 2022-07-01 2023-06-30 0001070732 2023-07-01 2024-06-30 0001070732 evsit:CommonSharesMember 2024-07-01 2024-12-31 0001070732 2020-06-30 0001070732 evsit:PreferredSharesMember 2020-06-30 0001070732 2021-06-30 0001070732 evsit:PreferredSharesMember 2021-06-30 0001070732 2022-06-30 0001070732 evsit:PreferredSharesMember 2022-06-30 0001070732 2023-06-30 0001070732 evsit:PreferredSharesMember 2023-06-30 0001070732 2024-06-30 0001070732 evsit:PreferredSharesMember 2024-06-30 0001070732 2024-12-31 0001070732 evsit:PreferredSharesMember 2024-12-31 iso4217:USDiso4217:USDxbrli:sharesxbrli:purexbrli:shares
     
     
    UNITED STATES
    SECURITIES AND EXCHANGE COMMISSION
    Washington, D.C. 20549
     
     
    Form N‑CSR
     
     
    CERTIFIED SHAREHOLDER REPORT OF REGISTERED
    MANAGEMENT INVESTMENT COMPANIES
    Investment Company Act File Number: 811‑09013
     
     
     
    Eaton Vance Senior Income Trust
    (Exact Name of Registrant as Specified in Charter)
     
     
    One Post Office Square, Boston, Massachusetts 02109
    (Address of Principal Executive Offices)
     
     
    Deidre E. Walsh
    One Post Office Square, Boston, Massachusetts 02109
    (Name and Address of Agent for Services)
     
     
    (617) 482‑8260
    (Registrant’s Telephone Number)
    June 30
    Date of Fiscal Year End
    December 31, 2024
    Date of Reporting Period
     
     
     

    Item 1. Reports to Stockholders
     


    Eaton Vance
    Senior Income Trust (EVF)
    Semi-Annual Report
    December 31, 2024


    Commodity Futures Trading Commission Registration. The Commodity Futures Trading Commission (“CFTC”) has adopted regulations that subject registered investment companies and advisers to regulation by the CFTC if a fund invests more than a prescribed level of its assets in certain CFTC-regulated instruments (including futures, certain options and swap agreements) or markets itself as providing investment exposure to such instruments. The investment adviser has claimed an exclusion from the definition of “commodity pool operator” under the Commodity Exchange Act with respect to its management of the Fund. Accordingly, neither the Fund nor the adviser with respect to the operation of the Fund is subject to CFTC regulation. Because of its management of other strategies, the Fund's adviser is registered with the CFTC as a commodity pool operator. The adviser is also registered as a commodity trading advisor.
    Fund shares are not insured by the FDIC and are not deposits or other obligations of, or guaranteed by, any depository institution. Shares are subject to investment risks, including possible loss of principal invested.

    Semi-Annual Report December 31, 2024
    Eaton Vance
    Senior Income Trust
    Table of Contents  
    Performance 2
    Fund Profile 3
    Endnotes and Additional Disclosures 4
    Financial Statements 5
    Annual Meeting of Shareholders 35
    Officers and Trustees 36
    U.S. Customer Privacy Notice 37
    Important Notices 40

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Performance

    Portfolio Manager(s) Andrew N. Sveen, CFA, Catherine C. McDermott, Daniel P. McElaney, CFA and Sarah A. Choi
    % Average Annual Total Returns1,2 Inception Date Six Months One Year Five Years Ten Years
    Fund at NAV 10/30/1998 5.12% 9.87% 6.05% 6.26%
    Fund at Market Price — 1.97 7.61 7.93 7.52

    Morningstar® LSTA® US Leveraged Loan IndexSM — 4.36% 8.95% 5.85% 5.14%
    % Premium/Discount to NAV3  
    As of period end (0.16)%
    Distributions4  
    Total Distributions per share for the period $0.32
    Distribution Rate at NAV 9.17%
    Distribution Rate at Market Price 9.19
    % Total Leverage5  
    Auction Preferred Shares (APS) 22.15%
    Borrowings 12.37
    See Endnotes and Additional Disclosures in this report.
    Past performance is no guarantee of future results. Returns are historical and are calculated net of management fees and other expenses by determining the percentage change in net asset value (NAV) or market price (as applicable) with all distributions reinvested in accordance with the Fund’s Dividend Reinvestment Plan. Furthermore, returns do not reflect the deduction of taxes that shareholders may have to pay on Fund distributions or upon the sale of Fund shares. Performance at market price will differ from performance at NAV due to variations in the Fund’s market price versus NAV, which may reflect factors such as fluctuations in supply and demand for Fund shares, changes in Fund distributions, shifting market expectations for the Fund’s future returns and distribution rates, and other considerations affecting the trading prices of closed-end funds. Investment return and principal value will fluctuate so that shares, when sold, may be worth more or less than their original cost. Performance for periods less than or equal to one year is cumulative. Performance is for the stated time period only; due to market volatility, current Fund performance may be lower or higher than the quoted return. For performance as of the most recent month-end, please refer to eatonvance.com.
    2

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Fund Profile

    Top 10 Issuers (% of total investments)1  
    Asurion LLC 0.9%
    UKG, Inc. 0.8
    Great Outdoors Group LLC 0.8
    Mallinckrodt International Finance SA 0.7
    Cloudera, Inc. 0.7
    INEOS Quattro Holdings U.K. Ltd. 0.7
    Clarios Global LP 0.7
    Boxer Parent Co., Inc. 0.6
    Greystar Real Estate Partners LLC 0.6
    Virgin Media Bristol LLC 0.6
    Total 7.1%
        
    Top 10 Industries (% of total investments)1
    Software 11.2%
    Health Care Providers & Services 6.6
    Chemicals 5.3
    Machinery 5.0
    Hotels, Restaurants & Leisure 4.2
    Capital Markets 3.9
    Professional Services 3.9
    Commercial Services & Supplies 3.4
    Specialty Retail 3.3
    IT Services 3.2
    Total 50.0%
     
    Credit Quality (% of bonds, loans and asset-backed securities)2
    Footnotes:
    1 Excludes cash and cash equivalents.
    2 Credit ratings are categorized using S&P Global Ratings (“S&P”). Ratings, which are subject to change, apply to the creditworthiness of the issuers of the underlying securities and not to the Fund or its shares. Credit ratings measure the quality of a bond based on the issuer’s creditworthiness, with ratings ranging from AAA, being the highest, to D, being the lowest based on S&P’s measures. Ratings of BBB or higher by S&P are considered to be investment-grade quality. Credit ratings are based largely on the ratings agency’s analysis at the time of rating. The rating assigned to any particular security is not necessarily a reflection of the issuer’s current financial condition and does not necessarily reflect its assessment of the volatility of a security’s market value or of the liquidity of an investment in the security. Holdings designated as “Not Rated” (if any) are not rated by S&P.
    3

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Endnotes and Additional Disclosures

    1 Morningstar® LSTA® US Leveraged Loan IndexSM is an unmanaged index of the institutional leveraged loan market. Morningstar® LSTA® Leveraged Loan indices are a product of Morningstar, Inc. (“Morningstar”) and have been licensed for use. Morningstar® is a registered trademark of Morningstar licensed for certain use. Loan Syndications and Trading Association® and LSTA® are trademarks of the LSTA licensed for certain use by Morningstar, and further sublicensed by Morningstar for certain use. Neither Morningstar nor LSTA guarantees the accuracy and/or completeness of the Morningstar® LSTA® US Leveraged Loan IndexSM or any data included therein, and shall have no liability for any errors, omissions, or interruptions therein. Unless otherwise stated, index returns do not reflect the effect of any applicable sales charges, commissions, expenses, taxes or leverage, as applicable. It is not possible to invest directly in an index.
    2 Performance results reflect the effects of leverage. Included in the average annual total return at NAV for the ten-year period is the impact of the 2017 and 2019 tender and repurchase of a portion of the Fund’s APS at 95% and 92% of the Fund’s APS per share liquidation preference, respectively. Had these transactions not occurred, the total return at NAV would be lower for the Fund.
    Included in the average annual total return at NAV for the five- and ten-year periods is the impact of the 2021 tender offer by the Fund for a portion of its common shares at 99% of the Fund’s NAV. Had this tender offer not occurred, the total return at NAV would be lower for the Fund.
    3 The shares of the Fund often trade at a discount or premium to their net asset value. The discount or premium may vary over time and may be higher or lower than what is quoted in this report. For up-to-date premium/discount information, please refer to https://funds.eatonvance.com/closed-end-fund-prices.php.
    4 The Distribution Rate is based on the Fund’s last regular distribution per share in the period (annualized) divided by the Fund’s NAV or market price at the end of the period. The Fund’s distributions may be comprised of amounts characterized for federal income tax purposes as qualified and non-qualified ordinary dividends, capital gains and nondividend distributions, also known as return of capital. For additional information about nondividend distributions, please refer to Eaton Vance Closed-End Fund Distribution Notices (19a) posted on our website, eatonvance.com. The Fund will determine the federal income tax character of distributions paid to a shareholder after the end of the calendar year. This is reported on the IRS form 1099-DIV and provided to the shareholder shortly after each year-end. For information about the tax character of distributions made in prior calendar years, please refer to Performance-Tax Character of Distributions on the Fund’s webpage available at eatonvance.com. The Fund’s distributions are determined by the investment adviser based on its current assessment of the Fund’s long-term return potential. Fund distributions may be affected by numerous factors including changes in Fund performance, the cost of financing for leverage, portfolio holdings, realized and projected returns, and other factors. As portfolio and market conditions change, the rate of distributions paid by the Fund could change.
    5 Leverage represents the liquidation value of the Fund’s APS and borrowings outstanding as a percentage of Fund net assets applicable
      to common shares plus APS and borrowings outstanding. Use of leverage creates an opportunity for income, but creates risks including greater price volatility. The cost of leverage rises and falls with changes in short-term interest rates. The Fund may be required to maintain prescribed asset coverage for its leverage and may be required to reduce its leverage at an inopportune time.
      Fund profile subject to change due to active management.
      Important Notice to Shareholders
      Effective January 30, 2025, the Fund’s portfolio management team consists of Catherine C. McDermott, Daniel P. McElaney, CFA and Sarah A. Choi.
     
    4

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Portfolio of Investments (Unaudited)

    Asset-Backed Securities — 7.5%
    Security Principal
    Amount
    (000's omitted)
    Value
    ARES XXXIV CLO Ltd., Series 2015-2A, Class ER, 11.759%, (3 mo. SOFR + 7.112%), 4/17/33(1)(2) $       550 $    551,421
    Benefit Street Partners CLO XVIII Ltd., Series 2019-18A, Class ER, 11.668%, (3 mo. SOFR + 7.012%), 10/15/34(1)(2)         500     504,971
    BlueMountain CLO XXVI Ltd., Series 2019-26A, Class ER, 12.009%, (3 mo. SOFR + 7.392%), 10/20/34(1)(2)       1,000   1,009,171
    Canyon Capital CLO Ltd., Series 2019-2A, Class ER, 11.668%, (3 mo. SOFR + 7.012%), 10/15/34(1)(2)         400     402,094
    Carlyle Global Market Strategies CLO Ltd.:       
    Series 2012-3A, Class DR2, 11.418%, (3 mo. SOFR + 6.762%), 1/14/32(1)(2)         600     602,318
    Series 2015-5A, Class DR, 11.579%, (3 mo. SOFR + 6.962%), 1/20/32(1)(2)         500     500,908
    Galaxy XV CLO Ltd., Series 2013-15A, Class ER, 11.563%, (3 mo. SOFR + 6.907%), 10/15/30(1)(2)         500     501,328
    Galaxy XXI CLO Ltd., Series 2015-21A, Class ER, 10.129%, (3 mo. SOFR + 5.512%), 4/20/31(1)(2)         500     501,418
    Neuberger Berman Loan Advisers CLO 31 Ltd., Series 2019-31A, Class ER, 11.379%, (3 mo. SOFR + 6.762%), 4/20/31(1)(2)         500     504,343
    Palmer Square CLO Ltd.:       
    Series 2013-2A, Class DRR, 10.759%, (3 mo. SOFR + 6.112%), 10/17/31(1)(2)         450     451,258
    Series 2019-1A, Class DR, 11.278%, (3 mo. SOFR + 6.762%), 11/14/34(1)(2)         500     502,767
    Regatta XIV Funding Ltd., Series 2018-3A, Class E, 10.838%, (3 mo. SOFR + 6.212%), 10/25/31(1)(2)         300     301,154
    Vibrant CLO XI Ltd., Series 2019-11A, Class D, 11.649%, (3 mo. SOFR + 7.032%), 7/20/32(1)(2)         500     501,899
    Voya CLO Ltd., Series 2013-1A, Class DR, 11.398%, (3 mo. SOFR + 6.742%), 10/15/30(1)(2)       1,000     950,615
    Wellfleet CLO Ltd., Series 2020-1A, Class D, 12.158%, (3 mo. SOFR + 7.502%), 4/15/33(1)(2)         550     540,031
    Total Asset-Backed Securities
    (identified cost $8,268,820)
        $  8,325,696
        
    Common Stocks — 1.8%
    Security Shares Value
    Aerospace and Defense — 0.0%
    IAP Worldwide Services LLC(3)(4)(5)          28 $          0
          $          0
    Commercial Services & Supplies — 0.1%
    Monitronics International, Inc.(4)(5)       4,716 $     99,036
    Security Shares Value
    Commercial Services & Supplies (continued)
    Phoenix Services International LLC(4)(5)       7,568 $     31,218
    Phoenix Services International LLC(4)(5)         690       2,846
          $    133,100
    Electronics/Electrical — 0.0%(6)
    Skillsoft Corp.(4)(5)       1,256 $     30,094
          $     30,094
    Entertainment — 0.2%
    New Cineworld Ltd.(4)(5)       7,709 $    196,387
          $    196,387
    Health Care — 0.6%
    Cano Health, Inc.(4)(5)      42,627 $    372,986
    Envision Parent, Inc.(4)(5)      19,128     221,569
          $    594,555
    Household Durables — 0.2%
    Serta Simmons Bedding, Inc.(4)(5)      35,996 $    258,721
    Serta SSB Equipment Co.(3)(4)(5)      35,996           0
          $    258,721
    Investment Companies — 0.0%(6)
    Aegletes BV(4)(5)       6,311 $      4,500
          $      4,500
    Pharmaceuticals — 0.7%
    Covis Midco 1 SARL, Class A(4)(5)         147 $         75
    Covis Midco 1 SARL, Class B(4)(5)         147          75
    Covis Midco 1 SARL, Class C(4)(5)         147          75
    Covis Midco 1 SARL, Class D(4)(5)         147          75
    Covis Midco 1 SARL, Class E(4)(5)         147          75
    Mallinckrodt International Finance SA(4)(5)       8,609     759,529
          $    759,904
    Retail — 0.0%
    Jubilee Enterprise PCL, Class A1(3)(4)(5)         995 $          0
    Jubilee Enterprise PCL, Class A2(3)(4)(5)     795,141           0
          $          0
    Retailers (Except Food and Drug) — 0.0%
    Phillips Feed Service, Inc.(3)(4)(5)         269 $          0
          $          0
     
    5
    See Notes to Financial Statements.

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Portfolio of Investments (Unaudited) — continued

    Security Shares Value
    Telecommunications — 0.0%
    GEE Acquisition Holdings Corp.(3)(4)(5)      21,114 $          0
          $          0
    Total Common Stocks
    (identified cost $2,688,513)
        $  1,977,261
        
    Corporate Bonds — 5.0%
    Security Principal
    Amount
    (000's omitted)
    Value
    Aerospace and Defense — 0.2%
    Bombardier, Inc., 6.00%, 2/15/28(1) $       100 $     99,680
    TransDigm, Inc., 4.875%, 5/1/29         135     127,594
          $    227,274
    Airlines — 0.1%
    VistaJet Malta Finance PLC/Vista Management Holding, Inc., 6.375%, 2/1/30(1) $       135 $    118,103
          $    118,103
    Automotive — 0.5%
    Clarios Global LP/Clarios U.S. Finance Co., 8.50%, 5/15/27(1) $       500 $    501,698
          $    501,698
    Building and Development — 0.2%
    CP Atlas Buyer, Inc., 7.00%, 12/1/28(1) $        16 $     14,090
    Smyrna Ready Mix Concrete LLC, 6.00%, 11/1/28(1)         135     131,819
    Standard Industries, Inc., 4.75%, 1/15/28(1)         135     129,309
          $    275,218
    Business Equipment and Services — 0.3%
    Prime Security Services Borrower LLC/Prime Finance, Inc., 5.75%, 4/15/26(1) $       325 $    325,110
          $    325,110
    Cable and Satellite Television — 0.1%
    CCO Holdings LLC/CCO Holdings Capital Corp., 4.50%, 8/15/30(1) $       135 $    121,336
          $    121,336
    Security Principal
    Amount
    (000's omitted)
    Value
    Commercial Services — 0.1%
    Mavis Tire Express Services Topco Corp., 6.50%, 5/15/29(1) $       130 $    124,809
          $    124,809
    Cosmetics/Toiletries — 0.1%
    Edgewell Personal Care Co., 5.50%, 6/1/28(1) $       135 $    132,254
          $    132,254
    Distribution & Wholesale — 0.4%
    BCPE Empire Holdings, Inc., 7.625%, 5/1/27(1) $       129 $    128,691
    Performance Food Group, Inc., 5.50%, 10/15/27(1)         300     297,775
          $    426,466
    Ecological Services and Equipment — 0.1%
    GFL Environmental, Inc., 4.375%, 8/15/29(1) $        98 $     92,726
          $     92,726
    Engineering & Construction — 0.1%
    TopBuild Corp., 3.625%, 3/15/29(1) $       135 $    123,782
          $    123,782
    Entertainment — 0.2%
    Caesars Entertainment, Inc., 8.125%, 7/1/27(1) $       169 $    170,828
          $    170,828
    Food Service — 0.1%
    Albertsons Cos., Inc./Safeway, Inc./New Albertsons LP/Albertsons LLC, 3.50%, 3/15/29(1) $       135 $    122,999
          $    122,999
    Health Care — 0.6%
    LifePoint Health, Inc., 5.375%, 1/15/29(1) $       135 $    118,507
    Medline Borrower LP, 5.25%, 10/1/29(1)          64      61,825
    Tenet Healthcare Corp., 6.875%, 11/15/31         500     520,100
          $    700,432
    Home Furnishings — 0.1%
    Tempur Sealy International, Inc., 4.00%, 4/15/29(1) $       135 $    124,514
          $    124,514
    Insurance — 0.1%
    Alliant Holdings Intermediate LLC/Alliant Holdings Co-Issuer, 6.75%, 10/15/27(1) $       100 $     99,274
          $     99,274
     
    6
    See Notes to Financial Statements.

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Portfolio of Investments (Unaudited) — continued

    Security Principal
    Amount
    (000's omitted)
    Value
    Leisure Goods/Activities/Movies — 0.2%
    NCL Finance Ltd., 6.125%, 3/15/28(1) $       124 $    124,491
    Viking Cruises Ltd., 5.875%, 9/15/27(1)         135     134,428
          $    258,919
    Media — 0.1%
    Diamond Sports Group LLC/Diamond Sports Finance Co., 5.375%, 8/15/26(1)(7) $         0(8) $          1
    iHeartCommunications, Inc., 9.125%, 5/1/29(1)          97      84,830
          $     84,831
    Oil and Gas — 0.3%
    Civitas Resources, Inc., 8.375%, 7/1/28(1) $       100 $    103,982
    Permian Resources Operating LLC, 5.375%, 1/15/26(1)         135     134,292
    Vital Energy, Inc., 9.75%, 10/15/30         100     105,535
          $    343,809
    Pipelines — 0.1%
    Venture Global LNG, Inc., 8.375%, 6/1/31(1) $       119 $    124,231
          $    124,231
    Real Estate Investment Trusts (REITs) — 0.1%
    HAT Holdings I LLC/HAT Holdings II LLC, 3.375%, 6/15/26(1) $       135 $    130,906
          $    130,906
    Technology — 0.1%
    athenahealth Group, Inc., 6.50%, 2/15/30(1) $       135 $    128,430
          $    128,430
    Utilities — 0.5%
    Calpine Corp., 5.00%, 2/1/31(1) $       134 $    126,107
    NRG Energy, Inc., 3.625%, 2/15/31(1)         500     437,576
          $    563,683
    Wireless Telecommunication Services — 0.3%
    Digicel Intermediate Holdings Ltd./Digicel International Finance Ltd./DIFL U.S., 12.00%, (9.00% cash and 3.00% PIK), 5/25/27 $       278 $    275,559
          $    275,559
    Total Corporate Bonds
    (identified cost $5,527,045)
        $  5,597,191
        
    Preferred Stocks — 0.1%
    Security Shares Value
    Technology — 0.1%
    Cohesity Global, Inc.:       
    Series G(4)       1,574 $     41,318
    Series G1(4)       1,088      28,560
    Total Preferred Stocks
    (identified cost $54,571)
        $     69,878
        
    Senior Floating-Rate Loans — 133.7%(9)
    Borrower/Description Principal
    Amount*
    (000's omitted)
    Value
    Aerospace and Defense — 1.5%
    Air Comm Corp. LLC:       
    Term Loan, 0.00%, 12/11/31(10)          35 $     34,681
    Term Loan, 7.359%, (SOFR + 3.00%), 11/21/31         415     416,166
    HDI Aerospace Intermediate Holding III Corp., Term Loan, 9/19/31(11)         175     175,875
    IAP Worldwide Services, Inc., Term Loan - Second Lien, 0.00%, 7/18/23(3)(7)         202     160,655
    Novaria Holdings LLC, Term Loan, 8.457%, (SOFR + 4.00%), 6/6/31         349     352,616
    TransDigm, Inc., Term Loan, 6.829%, (SOFR + 2.50%), 2/28/31         496     497,659
          $  1,637,652
    Air Freight & Logistics — 0.2%
    AIT Worldwide Logistics, Inc., Term Loan, 9.278%, (SOFR + 4.75%), 4/8/30         175 $    176,476
          $    176,476
    Airlines — 0.6%
    American Airlines, Inc., Term Loan, 9.629%, (SOFR + 4.75%), 4/20/28         648 $    665,821
          $    665,821
    Apparel & Luxury Goods — 1.7%
    ABG Intermediate Holdings 2 LLC, Term Loan, 6.595%, (SOFR + 2.25%), 12/21/28         570 $    573,379
    Gloves Buyer, Inc., Term Loan, 8.472%, (SOFR + 4.00%), 12/29/27         852     852,541
    Varsity Brands, Inc., Term Loan, 8.271%, (SOFR + 3.75%), 8/26/31         500     501,188
          $  1,927,108
     
    7
    See Notes to Financial Statements.

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Portfolio of Investments (Unaudited) — continued

    Borrower/Description Principal
    Amount*
    (000's omitted)
    Value
    Auto Components — 3.2%
    Adient U.S. LLC, Term Loan, 6.607%, (SOFR + 2.25%), 1/31/31         320 $    321,575
    Autokiniton U.S. Holdings, Inc., Term Loan, 8.472%, (SOFR + 4.00%), 4/6/28         724     720,770
    Clarios Global LP, Term Loan, 6.857%, (SOFR + 2.50%), 5/6/30         623     626,788
    DexKo Global, Inc.:       
    Term Loan, 6.683%, (3 mo. EURIBOR + 4.00%), 10/4/28 EUR       134     132,620
    Term Loan, 6.843%, (3 mo. EURIBOR + 4.00%), 10/4/28 EUR        91      90,305
    Term Loan, 8.34%, (SOFR + 3.75%), 10/4/28         195     184,364
    Garrett LX I SARL, Term Loan, 7.335%, (SOFR + 2.75%), 4/30/28         339     340,741
    LTI Holdings, Inc., Term Loan, 9.107%, (SOFR + 4.75%), 7/19/29         499     500,184
    RealTruck Group, Inc.:       
    Term Loan, 7.972%, (SOFR + 3.50%), 1/31/28         489     474,940
    Term Loan, 9.472%, (SOFR + 5.00%), 1/31/28         199     199,244
          $  3,591,531
    Automobiles — 0.6%
    MajorDrive Holdings IV LLC:       
    Term Loan, 8.59%, (SOFR + 4.00%), 6/1/28         314 $    306,625
    Term Loan, 9.979%, (SOFR + 5.50%), 6/1/29         413     407,113
          $    713,738
    Beverages — 1.3%
    Arterra Wines Canada, Inc., Term Loan, 8.09%, (SOFR + 3.50%), 11/24/27         480 $    470,923
    City Brewing Co. LLC:       
    Term Loan, 8.418%, (SOFR + 3.50%), 4/5/28         153     108,826
    Term Loan, 10.906%, (SOFR + 6.25%), 4/5/28          50      37,631
    Term Loan - Second Lien, 9.918%, (SOFR + 5.00%), 4/5/28         304     119,680
    Triton Water Holdings, Inc., Term Loan, 7.84%, (SOFR + 3.25%), 3/31/28         724     730,361
          $  1,467,421
    Biotechnology — 0.4%
    Alltech, Inc., Term Loan, 8.472%, (SOFR + 4.00%), 10/13/28         445 $    447,371
          $    447,371
    Building Products — 2.8%
    Cornerstone Building Brands, Inc., Term Loan, 7.747%, (SOFR + 3.25%), 4/12/28         446 $    427,507
    Borrower/Description Principal
    Amount*
    (000's omitted)
    Value
    Building Products (continued)
    CPG International, Inc., Term Loan, 6.357%, (SOFR + 2.00%), 9/19/31         200 $    200,560
    Kodiak Building Partners, Inc., Term Loan, 8.274%, (SOFR + 3.75%), 12/4/31         150     150,295
    LHS Borrower LLC, Term Loan, 9.207%, (SOFR + 4.75%), 2/16/29         285     273,207
    LSF12 Crown U.S. Commercial Bidco LLC, Term Loan, 8.646%, (SOFR + 4.25%), 12/2/31         575     575,003
    MI Windows & Doors LLC, Term Loan, 7.357%, (SOFR + 3.00%), 3/28/31         697     704,482
    Oscar AcquisitionCo LLC, Term Loan, 8.495%, (SOFR + 4.25%), 4/29/29         716     709,699
    Standard Industries, Inc., Term Loan, 6.106%, (SOFR + 1.75%), 9/22/28          95      94,962
          $  3,135,715
    Capital Markets — 6.0%
    Advisor Group, Inc., Term Loan, 7.857%, (SOFR + 3.50%), 8/17/28         492 $    495,034
    AllSpring Buyer LLC, Term Loan, 7.329%, (SOFR + 3.00%), 11/1/30         389     390,333
    Aretec Group, Inc., Term Loan, 7.857%, (SOFR + 3.50%), 8/9/30         532     534,091
    CeramTec AcquiCo GmbH, Term Loan, 6.412%, (3 mo. EURIBOR + 3.50%), 3/16/29 EUR       600     621,541
    Citco Funding LLC, Term Loan, 7.308%, (SOFR + 2.75%), 4/27/28         222     224,358
    Edelman Financial Center LLC, Term Loan, 7.357%, (SOFR + 3.00%), 4/7/28         811     816,503
    EIG Management Co. LLC, Term Loan, 9.356%, (SOFR + 5.00%), 5/17/29         123     124,055
    FinCo I LLC, Term Loan, 6.607%, (SOFR + 2.25%), 6/27/29         346     347,353
    Focus Financial Partners LLC:       
    Term Loan, 0.00%, 9/15/31(10)          77      78,209
    Term Loan, 7.607%, (SOFR + 3.25%), 9/15/31         721     728,184
    Franklin Square Holdings LP, Term Loan, 6.607%, (SOFR + 2.25%), 4/25/31         274     275,677
    HighTower Holdings LLC, Term Loan, 8.071%, (SOFR + 3.50%), 4/21/28         809     814,360
    Kestra Advisor Services Holdings A, Inc., Term Loan, 7.37%, (SOFR + 3.00%), 3/22/31         474     474,947
    Mariner Wealth Advisors LLC, Term Loan, 7.079%, (SOFR + 2.75%), 8/18/28         171      171,232
     
    8
    See Notes to Financial Statements.

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Portfolio of Investments (Unaudited) — continued

    Borrower/Description Principal
    Amount*
    (000's omitted)
    Value
    Capital Markets (continued)
    Orion Advisor Solutions, Inc., Term Loan, 8.335%, (SOFR + 3.75%), 9/24/30         175 $    176,444
    Press Ganey Holdings, Inc., Term Loan, 7.607%, (SOFR + 3.25%), 4/30/31         424     425,661
          $  6,697,982
    Chemicals — 8.2%
    Aruba Investments Holdings LLC:       
    Term Loan, 6.863%, (1 mo. EURIBOR + 4.00%), 11/24/27 EUR       241 $    247,124
    Term Loan, 8.457%, (SOFR + 4.00%), 11/24/27         337     338,616
    Charter NEX U.S., Inc., Term Loan, 7.525%, (SOFR + 3.00%), 11/29/30         462     465,225
    CPC Acquisition Corp., Term Loan, 8.34%, (SOFR + 3.75%), 12/29/27         401     360,156
    Discovery Purchaser Corp., Term Loan, 8.965%, (SOFR + 4.38%), 10/4/29         448     451,405
    Gemini HDPE LLC, Term Loan, 7.847%, (SOFR + 3.00%), 12/31/27         315     317,392
    Groupe Solmax, Inc., Term Loan, 9.285%, (SOFR + 4.75%), 5/29/28(12)         353     326,450
    INEOS Enterprises Holdings U.S. Finco LLC, Term Loan, 8.364%, (SOFR + 3.75%), 7/8/30         322     323,359
    INEOS Quattro Holdings U.K. Ltd.:       
    Term Loan, 6.863%, (1 mo. EURIBOR + 4.00%), 3/14/30 EUR        75      77,737
    Term Loan, 8.207%, (SOFR + 3.75%), 3/14/30         123     123,664
    Term Loan, 8.707%, (SOFR + 4.25%), 4/2/29         970     978,658
    Ineos U.S. Finance LLC, Term Loan, 7.329%, (SOFR + 3.00%), 2/7/31         150     151,028
    INEOS U.S. Finance LLC:       
    Term Loan, 6.957%, (SOFR + 2.50%), 11/8/28         146     146,081
    Term Loan, 7.607%, (SOFR + 3.25%), 2/18/30         717     720,612
    Lonza Group AG, Term Loan, 8.354%, (SOFR + 3.93%), 7/3/28         700     688,535
    Momentive Performance Materials, Inc., Term Loan, 8.357%, (SOFR + 4.00%), 3/29/28         393     398,287
    Nouryon Finance BV, Term Loan, 7.657%, (SOFR + 3.25%), 4/3/28         173     175,455
    Olympus Water U.S. Holding Corp., Term Loan, 7.329%, (SOFR + 3.00%), 6/20/31         631     634,111
    Paint Intermediate III LLC, Term Loan, 7.522%, (SOFR + 3.00%), 10/9/31         150     151,063
    Rohm Holding GmbH, Term Loan, 10.588%, (SOFR + 5.50%), 1/31/29         434     417,471
    SCUR-Alpha 1503 GmbH, Term Loan, 10.085%, (SOFR + 5.50%), 3/29/30         147      140,946
    Borrower/Description Principal
    Amount*
    (000's omitted)
    Value
    Chemicals (continued)
    Tronox Finance LLC, Term Loan, 6.601%, (SOFR + 2.25%), 4/4/29         650 $    652,266
    W.R. Grace & Co.-Conn., Term Loan, 7.579%, (SOFR + 3.25%), 9/22/28         785     792,289
          $  9,077,930
    Commercial Services & Supplies — 4.6%
    Albion Financing 3 SARL, Term Loan, 9.096%, (SOFR + 4.25%), 8/16/29         388 $    392,577
    Allied Universal Holdco LLC, Term Loan, 8.207%, (SOFR + 3.75%), 5/12/28         786     789,875
    Belfor Holdings, Inc., Term Loan, 8.107%, (SOFR + 3.75%), 11/1/30         163     165,098
    EnergySolutions LLC, Term Loan, 7.607%, (SOFR + 3.25%), 9/20/30         661     666,015
    Flame Newco LLC, Term Loan, 10.457%, (SOFR + 6.10%), 6/30/28          94      92,214
    Foundever Worldwide Corp., Term Loan, 8.222%, (SOFR + 3.75%), 8/28/28         873     591,580
    Garda World Security Corp., Term Loan, 7.897%, (SOFR + 3.50%), 2/1/29         790     794,846
    GFL Environmental, Inc., Term Loan, 6.61%, (SOFR + 2.00%), 7/3/31         249     250,154
    Heritage-Crystal Clean, Inc., Term Loan, 8.337%, (SOFR + 4.00%), 10/17/30         198     199,794
    Monitronics International, Inc., Term Loan, 12.119%, (SOFR + 7.50%), 6/30/28         257     255,918
    Prime Security Services Borrower LLC, Term Loan, 6.524%, (SOFR + 2.00%), 10/13/30         249     250,258
    Tempo Acquisition LLC, Term Loan, 6.607%, (SOFR + 2.25%), 8/31/28         402     403,737
    TruGreen LP, Term Loan, 8.457%, (SOFR + 4.00%), 11/2/27         288     281,160
          $  5,133,226
    Construction Materials — 1.5%
    Construction Partners, Inc., Term Loan, 6.838%, (SOFR + 2.50%), 11/3/31         150 $    151,032
    Quikrete Holdings, Inc., Term Loan, 6.607%, (SOFR + 2.25%), 3/19/29         973     973,258
    Star Holding LLC, Term Loan, 8.857%, (SOFR + 4.50%), 7/31/31         574     573,144
          $  1,697,434
    Consumer Staples Distribution & Retail — 0.9%
    Cardenas Markets, Inc., Term Loan, 11.179%, (SOFR + 6.75%), 8/1/29         123 $    117,224
     
    9
    See Notes to Financial Statements.

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Portfolio of Investments (Unaudited) — continued

    Borrower/Description Principal
    Amount*
    (000's omitted)
    Value
    Consumer Staples Distribution & Retail (continued)
    Peer Holding III BV:       
    Term Loan, 5.933%, (3 mo. EURIBOR + 3.25%), 9/29/28 EUR       150 $    156,260
    Term Loan, 7.329%, (SOFR + 3.00%), 7/1/31         375     377,578
    Term Loan, 7.579%, (SOFR + 3.25%), 10/28/30         323     325,116
          $    976,178
    Containers & Packaging — 1.4%
    Altium Packaging LLC, Term Loan, 6.857%, (SOFR + 2.50%), 6/11/31         124 $    124,453
    Berlin Packaging LLC, Term Loan, 8.051%, (SOFR + 3.50%), 6/7/31         514     517,152
    Clydesdale Acquisition Holdings, Inc., Term Loan, 7.532%, (SOFR + 3.18%), 4/13/29         530     531,341
    Pretium Packaging LLC, Term Loan - Second Lien, 9.171%, (SOFR + 4.60%), 10/2/28          14      10,986
    Pretium PKG Holdings, Inc., Term Loan - Second Lien, 11.534%, (SOFR + 6.75%), 10/1/29         100      37,615
    Proampac PG Borrower LLC, Term Loan, 8.604%, (SOFR + 4.00%), 9/15/28         322     323,164
          $  1,544,711
    Distributors — 0.4%
    CD&R Hydra Buyer, Inc., Term Loan, 8.457%, (SOFR + 4.00%), 3/25/31         372 $    373,816
    Phillips Feed Service, Inc., Term Loan, 11.457%, (SOFR + 7.00%), 11/13/26(3)          48      29,064
          $    402,880
    Diversified Consumer Services — 3.4%
    Ascend Learning LLC:       
    Term Loan, 7.957%, (SOFR + 3.50%), 12/11/28         567 $    570,447
    Term Loan - Second Lien, 12/10/29(11)         500     497,187
    Fugue Finance BV, Term Loan, 8.514%, (SOFR + 4.00%), 1/31/28         597     603,383
    KUEHG Corp., Term Loan, 7.839%, (SOFR + 3.25%), 6/12/30         387     391,232
    Project Boost Purchaser LLC, Term Loan, 8.147%, (SOFR + 3.50%), 7/16/31         475     478,969
    Spring Education Group, Inc., Term Loan, 8.329%, (SOFR + 4.00%), 10/4/30         496     499,962
    Wand NewCo 3, Inc., Term Loan, 7.607%, (SOFR + 3.25%), 1/30/31         684     687,307
          $  3,728,487
    Borrower/Description Principal
    Amount*
    (000's omitted)
    Value
    Diversified Financial Services — 0.5%
    Concorde Midco Ltd., Term Loan, 7.092%, (6 mo. EURIBOR + 4.00%), 3/1/28 EUR       250 $    259,351
    Sandy BidCo BV, Term Loan, 6.823%, (6 mo. EURIBOR + 3.60%), 8/17/29 EUR       275     283,346
          $    542,697
    Diversified Telecommunication Services — 2.5%
    Altice France SA, Term Loan, 10.147%, (SOFR + 5.50%), 8/15/28         437 $    352,154
    Anuvu Holdings 2 LLC:       
    Term Loan, 12.701%, (SOFR + 8.25%), 3/23/26(3)         477     185,885
    Term Loan, 14.451%, (SOFR + 10.00%), 8.451% cash, 6.00% PIK, 9/27/27(3)         192     153,652
    Level 3 Financing, Inc.:       
    Term Loan, 10.917%, (SOFR + 6.56%), 4/15/29         500     510,688
    Term Loan, 10.917%, (SOFR + 6.56%), 4/15/30         150     153,131
    Lumen Technologies, Inc., Term Loan, 4/15/30(11)         325     303,514
    Virgin Media Bristol LLC, Term Loan, 7.762%, (SOFR + 3.25%), 1/31/29       1,075   1,070,550
          $  2,729,574
    Electric Utilities — 0.5%
    Kohler Energy Co. LLC, Term Loan, 8.107%, (SOFR + 3.75%), 5/1/31         572 $    572,648
          $    572,648
    Electrical Equipment — 1.0%
    AZZ, Inc., Term Loan, 6.857%, (SOFR + 2.50%), 5/13/29         250 $    251,295
    WEC U.S. Holdings Ltd., Term Loan, 6.803%, (SOFR + 2.25%), 1/27/31         848     849,596
          $  1,100,891
    Electronic Equipment, Instruments & Components — 2.1%
    Chamberlain Group, Inc., Term Loan, 7.707%, (SOFR + 3.25%), 11/3/28         711 $    715,652
    Creation Technologies, Inc., Term Loan, 10.351%, (SOFR + 5.50%), 10/5/28         391     384,386
    Ingram Micro, Inc., Term Loan, 7.077%, (SOFR + 2.75%), 9/22/31         282     284,257
    Mirion Technologies, Inc., Term Loan, 6.579%, (SOFR + 2.25%), 10/20/28         146      147,281
     
    10
    See Notes to Financial Statements.

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Portfolio of Investments (Unaudited) — continued

    Borrower/Description Principal
    Amount*
    (000's omitted)
    Value
    Electronic Equipment, Instruments & Components (continued)
    Verifone Systems, Inc., Term Loan, 8.783%, (SOFR + 4.00%), 8/20/25         490 $    460,600
    Verisure Holding AB, Term Loan, 5.715%, (3 mo. EURIBOR + 3.00%), 3/27/28 EUR       375     390,549
          $  2,382,725
    Energy Equipment & Services — 0.3%
    Ameriforge Group, Inc., Term Loan, 15.459%, (SOFR + 11.00%), 4.459% cash, 11.00% PIK, 12/31/25(3)          27 $     12,314
    PG Investment Co. 59 SARL, Term Loan, 7.329%, (SOFR + 3.00%), 3/26/31         299     302,087
          $    314,401
    Engineering & Construction — 1.3%
    American Residential Services LLC, Term Loan, 7.972%, (SOFR + 3.50%), 10/15/27         264 $    266,640
    Artera Services LLC, Term Loan, 8.829%, (SOFR + 4.50%), 2/15/31         124     123,192
    Azuria Water Solutions, Inc., Term Loan, 8.107%, (SOFR + 3.75%), 5/17/28         294     296,933
    Northstar Group Services, Inc., Term Loan, 9.079%, (SOFR + 4.75%), 5/8/30         572     576,476
    Platea BC Bidco AB:       
    Term Loan, 4.532%, (3 mo. EURIBOR + 4.00%), 4/3/31(10) EUR        38      39,108
    Term Loan, 6.715%, (3 mo. EURIBOR + 4.00%), 4/3/31 EUR       188     195,541
          $  1,497,890
    Entertainment — 0.7%
    Renaissance Holding Corp., Term Loan, 8.385%, (SOFR + 4.00%), 4/5/30         272 $    271,249
    Vue Entertainment International Ltd., Term Loan, 11.446%, (3 mo. EURIBOR + 8.40%), 3.046% cash, 8.40% PIK, 12/31/27 EUR       592     386,174
    Vue International Bidco PLC, Term Loan, 11.046%, (6 mo. EURIBOR + 8.00%), 6/30/27 EUR       149     155,494
          $    812,917
    Financial Services — 1.9%
    Boost Newco Borrower LLC, Term Loan, 6.829%, (SOFR + 2.50%), 1/31/31         848 $    854,060
    CPI Holdco B LLC, Term Loan, 6.357%, (SOFR + 2.00%), 5/19/31         324     323,927
    Grant Thornton Advisors LLC, Term Loan, 7.607%, (SOFR + 3.25%), 6/2/31         623      624,354
    Borrower/Description Principal
    Amount*
    (000's omitted)
    Value
    Financial Services (continued)
    NCR Atleos LLC, Term Loan, 8.398%, (SOFR + 3.75%), 4/16/29         170 $    171,115
    Nuvei Technologies Corp., Term Loan, 7.444%, (SOFR + 3.00%), 11/15/31         150     150,493
          $  2,123,949
    Food Products — 1.3%
    CHG PPC Parent LLC, Term Loan, 7.472%, (SOFR + 3.00%), 12/8/28         122 $    122,370
    Del Monte Foods, Inc.:       
    Term Loan, 12.616%, (SOFR + 8.00%), 8/2/28         140     139,799
    Term Loan - Second Lien, 8.851%, (SOFR + 4.40%), 8/2/28         295     179,355
    Nomad Foods U.S. LLC, Term Loan, 6.968%, (SOFR + 2.50%), 11/12/29         588     590,753
    United Petfood Group BV, Term Loan, 5.822%, (3 mo. EURIBOR + 2.75%), 4/24/28 EUR       350     364,057
          $  1,396,334
    Gas Utilities — 0.8%
    CQP Holdco LP, Term Loan, 6.329%, (SOFR + 2.00%), 12/31/30         906 $    908,415
          $    908,415
    Health Care Equipment & Supplies — 1.4%
    Bayou Intermediate II LLC, Term Loan, 9.347%, (SOFR + 4.50%), 8/2/28         388 $    388,166
    Journey Personal Care Corp., Term Loan, 8.107%, (SOFR + 3.75%), 3/1/28         726     727,474
    Medline Borrower LP, Term Loan, 6.607%, (SOFR + 2.25%), 10/23/28         443     445,054
          $  1,560,694
    Health Care Providers & Services — 8.9%
    AEA International Holdings (Lux) SARL, Term Loan, 7.079%, (SOFR + 2.75%), 9/7/28         561 $    565,025
    Biogroup-LCD, Term Loan, 6.532%, (3 mo. EURIBOR + 3.50%), 2/9/28 EUR       125     125,105
    BW NHHC Holdco, Inc., Term Loan - Second Lien, 14.579%, (SOFR + 10.25%), 12.329% cash, 2.25% PIK, 1/15/26       1,064     975,277
    Cano Health LLC, Term Loan, 13.829%, (SOFR + 9.50%), 6/28/29         192     189,867
    CCRR Parent, Inc., Term Loan, 9.026%, (SOFR + 4.25%), 3/6/28         682      405,421
     
    11
    See Notes to Financial Statements.

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Portfolio of Investments (Unaudited) — continued

    Borrower/Description Principal
    Amount*
    (000's omitted)
    Value
    Health Care Providers & Services (continued)
    Cerba Healthcare SAS:       
    Term Loan, 6.563%, (1 mo. EURIBOR + 3.70%), 6/30/28 EUR       100 $     90,164
    Term Loan, 6.813%, (1 mo. EURIBOR + 3.95%), 2/16/29 EUR       150     134,865
    CHG Healthcare Services, Inc.:       
    Term Loan, 7.396%, (SOFR + 3.00%), 9/29/28         560     562,752
    Term Loan, 8.276%, (SOFR + 3.50%), 9/29/28         124     124,936
    CNT Holdings I Corp., Term Loan, 8.085%, (SOFR + 3.50%), 11/8/27         676     680,896
    Covis Finco SARL, Term Loan, 0.00%, 2/18/27(7)         181      73,716
    Electron BidCo, Inc., Term Loan, 7.107%, (SOFR + 2.75%), 11/1/28         195     195,963
    Ensemble RCM LLC, Term Loan, 7.585%, (SOFR + 3.00%), 8/1/29         323     326,141
    Hanger, Inc.:       
    Term Loan, 1.75%, 10/23/31(10)          43      43,252
    Term Loan, 7.857%, (SOFR + 3.50%), 10/23/31         332     335,920
    IVC Acquisition Ltd.:       
    Term Loan, 7.602%, (3 mo. EURIBOR + 4.75%), 12/12/28 EUR       400     416,671
    Term Loan, 9.079%, (SOFR + 4.75%), 12/12/28         272     274,765
    LSCS Holdings, Inc., Term Loan, 8.972%, (SOFR + 4.61%), 12/16/28         170     171,129
    Medical Solutions Holdings, Inc., Term Loan, 8.185%, (SOFR + 3.50%), 11/1/28         635     452,545
    National Mentor Holdings, Inc.:       
    Term Loan, 8.179%, (SOFR + 3.75%), 3/2/28          17      16,443
    Term Loan, 8.202%, (SOFR + 3.75%), 3/2/28(12)         579     574,856
    Option Care Health, Inc., Term Loan, 6.607%, (SOFR + 2.25%), 10/27/28          97      97,667
    Pacific Dental Services LLC, Term Loan, 7.125%, (SOFR + 2.75%), 3/15/31         223     225,127
    Phoenix Guarantor, Inc., Term Loan, 6.857%, (SOFR + 2.50%), 2/21/31         447     448,781
    Radnet Management, Inc., Term Loan, 6.771%, (SOFR + 2.25%), 4/18/31         199     200,262
    Raven Acquisition Holdings LLC:       
    Term Loan, 1.625%, 11/19/31(10)          30      30,105
    Term Loan, 7.607%, (SOFR + 3.25%), 11/19/31         420     421,472
    Select Medical Corp., Term Loan, 6.531%, (SOFR + 2.00%), 12/3/31         275     276,259
    Sound Inpatient Physicians, Term Loan - Second Lien, 9.59%, (SOFR + 5.00%), 8.09% cash, 1.50% PIK, 6/28/28         185     170,865
    Surgery Center Holdings, Inc., Term Loan, 7.089%, (SOFR + 2.75%), 12/19/30         641      646,282
    Borrower/Description Principal
    Amount*
    (000's omitted)
    Value
    Health Care Providers & Services (continued)
    Synlab Bondco PLC:       
    Term Loan, 6.178%, (6 mo. EURIBOR + 2.50%), 7/1/27 EUR       150 $    155,926
    Term Loan, 6.638%, (3 mo. EURIBOR + 3.50%), 10/18/30 EUR       150     156,119
    TTF Holdings LLC, Term Loan, 8.107%, (SOFR + 3.75%), 7/18/31         375     373,125
          $  9,937,699
    Health Care Technology — 3.3%
    athenahealth Group, Inc., Term Loan, 7.607%, (SOFR + 3.25%), 2/15/29         526 $    528,463
    Certara LP, Term Loan, 7.357%, (SOFR + 3.00%), 6/26/31         465     466,638
    Imprivata, Inc., Term Loan, 8.085%, (SOFR + 3.50%), 12/1/27       1,042   1,050,522
    PointClickCare Technologies, Inc., Term Loan, 7.579%, (SOFR + 3.25%), 11/3/31         465     468,029
    Project Ruby Ultimate Parent Corp., Term Loan, 7.472%, (SOFR + 3.00%), 3/10/28         531     533,900
    Symplr Software, Inc., Term Loan, 9.185%, (SOFR + 4.50%), 12/22/27         655     601,251
          $  3,648,803
    Hotels, Restaurants & Leisure — 6.1%
    Betclic Everest Group, Term Loan, 6.255%, (3 mo. EURIBOR + 3.25%), 12/5/31 EUR       125 $    130,210
    Caesars Entertainment, Inc., Term Loan, 6.607%, (SOFR + 2.25%), 2/6/31         645     647,341
    Carnival Corp., Term Loan, 7.107%, (SOFR + 2.75%), 10/18/28         876     883,429
    ClubCorp Holdings, Inc., Term Loan, 9.59%, (SOFR + 5.00%), 9/18/26         333     334,290
    Fertitta Entertainment LLC, Term Loan, 7.857%, (SOFR + 3.50%), 1/27/29         888     892,254
    Flutter Financing BV, Term Loan, 6.079%, (SOFR + 1.75%), 11/30/30         842     840,713
    Horizon U.S. Finco LP, Term Loan, 12/18/31(11)         300     298,875
    IRB Holding Corp., Term Loan, 6.857%, (SOFR + 2.50%), 12/15/27         348     349,025
    Ontario Gaming GTA LP, Term Loan, 8.579%, (SOFR + 4.25%), 8/1/30         422     423,266
    Playa Resorts Holding BV, Term Loan, 7.107%, (SOFR + 2.75%), 1/5/29         637      638,373
     
    12
    See Notes to Financial Statements.

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Portfolio of Investments (Unaudited) — continued

    Borrower/Description Principal
    Amount*
    (000's omitted)
    Value
    Hotels, Restaurants & Leisure (continued)
    Scientific Games Holdings LP, Term Loan, 7.59%, (SOFR + 3.00%), 4/4/29         599 $    600,670
    SeaWorld Parks & Entertainment, Inc., Term Loan, 6.357%, (SOFR + 2.00%), 12/4/31         714     713,696
          $  6,752,142
    Household Durables — 2.7%
    ACProducts, Inc., Term Loan, 8.84%, (SOFR + 4.25%), 5/17/28         719 $    584,520
    Libbey Glass, Inc., Term Loan, 11.267%, (SOFR + 6.50%), 11/22/27         283     276,061
    Madison Safety & Flow LLC, Term Loan, 7.607%, (SOFR + 3.25%), 9/26/31         224     226,367
    Serta Simmons Bedding LLC:       
    Term Loan, 11.943%, (SOFR + 7.50%), 6/29/28         700     595,224
    Term Loan, 12.232%, (SOFR + 7.50%), 6/29/28          76      75,833
    Solis IV BV, Term Loan, 7.005%, (3 mo. EURIBOR + 4.00%), 2/26/29 EUR       750     781,867
    Tempur Sealy International, Inc., Term Loan, 6.81%, (SOFR + 2.50%), 10/24/31         475     476,928
          $  3,016,800
    Household Products — 0.4%
    Kronos Acquisition Holdings, Inc., Term Loan, 8.584%, (SOFR + 4.00%), 7/8/31         499 $    472,254
          $    472,254
    Independent Power and Renewable Electricity Producers — 0.3%
    Thunder Generation Funding LLC, Term Loan, 7.329%, (SOFR + 3.00%), 10/3/31         299 $    301,587
          $    301,587
    Industrials Conglomerates — 0.6%
    AAG U.S. GSI Bidco, Inc., Term Loan, 9.329%, (SOFR + 5.00%), 10/8/31         150 $    151,500
    John Bean Technologies Corp., Term Loan, 10/9/31(11)         200     201,500
    nVent Electric PLC, Term Loan, 9/12/31(11)         325     328,962
          $    681,962
    Insurance — 2.3%
    Alliant Holdings Intermediate LLC, Term Loan, 7.106%, (SOFR + 2.75%), 9/19/31         619 $    621,542
    AmWINS Group, Inc., Term Loan, 6.722%, (SOFR + 2.25%), 2/19/28         157     157,434
    Broadstreet Partners, Inc., Term Loan, 7.357%, (SOFR + 3.00%), 6/13/31         597      599,740
    Borrower/Description Principal
    Amount*
    (000's omitted)
    Value
    Insurance (continued)
    Ryan Specialty Group LLC, Term Loan, 6.607%, (SOFR + 2.25%), 9/15/31         350 $    351,750
    Truist Insurance Holdings LLC:       
    Term Loan, 7.079%, (SOFR + 2.75%), 5/6/31         230     230,880
    Term Loan - Second Lien, 9.079%, (SOFR + 4.75%), 5/6/32         132     135,060
    USI, Inc., Term Loan, 6.579%, (SOFR + 2.25%), 9/27/30         498     497,376
          $  2,593,782
    Interactive Media & Services — 1.1%
    Arches Buyer, Inc., Term Loan, 7.707%, (SOFR + 3.25%), 12/6/27         784 $    767,075
    Getty Images, Inc., Term Loan, 8.845%, (SOFR + 4.50%), 2/19/26         446     444,982
          $  1,212,057
    IT Services — 5.0%
    Asurion LLC:       
    Term Loan, 8.457%, (SOFR + 4.00%), 8/19/28         497 $    496,781
    Term Loan - Second Lien, 9.722%, (SOFR + 5.25%), 1/31/28         750     734,734
    Term Loan - Second Lien, 9.722%, (SOFR + 5.25%), 1/20/29         325     314,665
    Endure Digital, Inc., Term Loan, 8.139%, (SOFR + 3.25%), 2/10/28         977     837,962
    Gainwell Acquisition Corp., Term Loan, 8.429%, (SOFR + 4.00%), 10/1/27         733     711,653
    Go Daddy Operating Co. LLC, Term Loan, 6.107%, (SOFR + 1.75%), 11/9/29         496     496,379
    NAB Holdings LLC, Term Loan, 7.079%, (SOFR + 2.75%), 11/23/28         782     787,269
    Plano HoldCo, Inc., Term Loan, 7.829%, (SOFR + 3.50%), 10/2/31         150     151,500
    Rackspace Finance LLC:       
    Term Loan, 10.847%, (SOFR + 6.25%), 5/15/28         191     198,103
    Term Loan - Second Lien, 7.347%, (SOFR + 2.75%), 5/15/28         957     557,563
    Synechron, Inc., Term Loan, 8.107%, (SOFR + 3.75%), 10/3/31         250     252,188
          $  5,538,797
    Leisure Products — 0.8%
    Recess Holdings, Inc., Term Loan, 9.085%, (SOFR + 4.50%), 2/20/30         571 $    576,931
     
    13
    See Notes to Financial Statements.

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Portfolio of Investments (Unaudited) — continued

    Borrower/Description Principal
    Amount*
    (000's omitted)
    Value
    Leisure Products (continued)
    Tait LLC, Term Loan, 8.857%, (SOFR + 4.50%), 10/1/31         275 $    277,750
          $    854,681
    Life Sciences Tools & Services — 1.7%
    Cambrex Corp., Term Loan, 7.957%, (SOFR + 3.50%), 12/4/26         143 $    143,666
    Curia Global, Inc., Term Loan, 8.435%, (SOFR + 3.75%), 8/30/26         663     635,851
    IQVIA, Inc., Term Loan, 6.329%, (SOFR + 2.00%), 1/2/31         371     374,220
    LGC Group Holdings Ltd., Term Loan, 6.113%, (1 mo. EURIBOR + 3.25%), 4/21/27 EUR       225     232,549
    Loire Finco Luxembourg SARL, Term Loan, 7.957%, (SOFR + 3.50%), 4/21/27         143     143,210
    Sotera Health Holdings LLC, Term Loan, 7.835%, (SOFR + 3.25%), 5/30/31         349     350,436
          $  1,879,932
    Machinery — 7.6%
    AI Aqua Merger Sub, Inc., Term Loan, 8.053%, (SOFR + 3.50%), 7/31/28         587 $    587,746
    American Trailer World Corp., Term Loan, 8.207%, (SOFR + 3.75%), 3/3/28         255     227,527
    Apex Tool Group LLC:       
    Term Loan, 14.457%, (SOFR + 10.10%), 11.957% cash, 2.50% PIK, 2/8/30         204     194,044
    Term Loan - Second Lien, 11.707%, (SOFR + 7.35%), 4.357% cash, 7.35% PIK, 2/8/29          87      82,231
    Barnes Group, Inc., Term Loan, 6.857%, (SOFR + 2.50%), 9/3/30         148     148,355
    Conair Holdings LLC, Term Loan, 8.222%, (SOFR + 3.75%), 5/17/28         581     524,215
    CPM Holdings, Inc., Term Loan, 9.053%, (SOFR + 4.50%), 9/28/28         496     482,524
    Crown Equipment Corp., Term Loan, 6.944%, (SOFR + 2.50%), 10/10/31         300     302,437
    Cube Industrials Buyer, Inc., Term Loan, 8.132%, (SOFR + 3.50%), 10/17/31         125     125,989
    EMRLD Borrower LP:       
    Term Loan, 6.829%, (SOFR + 2.50%), 8/4/31         274     275,742
    Term Loan, 6.933%, (SOFR + 2.50%), 5/31/30         215     215,985
    Engineered Machinery Holdings, Inc., Term Loan, 8.34%, (SOFR + 3.75%), 5/19/28         944     952,151
    Filtration Group Corp., Term Loan, 7.972%, (SOFR + 3.50%), 10/21/28         169     170,857
    Gates Global LLC, Term Loan, 6.107%, (SOFR + 1.75%), 6/4/31         698      700,565
    Borrower/Description Principal
    Amount*
    (000's omitted)
    Value
    Machinery (continued)
    Icebox Holdco III, Inc., Term Loan, 8.086%, (SOFR + 3.50%), 12/22/28         195 $    196,495
    Madison IAQ LLC, Term Loan, 7.889%, (SOFR + 2.75%), 6/21/28         246     247,366
    Pro Mach Group, Inc., Term Loan, 7.857%, (SOFR + 3.50%), 8/31/28         296     299,198
    Roper Industrial Products Investment Co. LLC, Term Loan, 7.079%, (SOFR + 2.75%), 11/22/29         419     420,227
    SPX Flow, Inc., Term Loan, 7.357%, (SOFR + 3.00%), 4/5/29         417     421,447
    Terex Corp., Term Loan, 6.357%, (SOFR + 2.00%), 10/8/31         675     678,166
    TK Elevator Midco GmbH, Term Loan, 7.59%, (6 mo. EURIBOR + 4.00%), 4/30/30 EUR       250     261,417
    TK Elevator Topco GmbH, Term Loan, 7.215%, (6 mo. EURIBOR + 3.63%), 7/30/27 EUR       150     156,271
    TK Elevator U.S. Newco, Inc., Term Loan, 8.588%, (SOFR + 3.50%), 4/30/30         415     418,267
    Zephyr German BidCo GmbH, Term Loan, 6.281%, (3 mo. EURIBOR + 3.40%), 3/10/28 EUR       300     310,707
          $  8,399,929
    Media — 0.7%
    Charter Communications Operating LLC, Term Loan, 6.781%, (SOFR + 2.25%), 12/15/31         175 $    174,829
    Gray Television, Inc., Term Loan, 7.667%, (SOFR + 3.00%), 12/1/28         243     224,722
    Hubbard Radio LLC, Term Loan, 8.857%, (SOFR + 4.50%), 9/30/27         178     122,111
    Sinclair Television Group, Inc., Term Loan, 6.972%, (SOFR + 2.50%), 9/30/26         284     281,123
          $    802,785
    Metals/Mining — 1.5%
    Arsenal AIC Parent LLC, Term Loan, 7.607%, (SOFR + 3.25%), 8/18/30         716 $    722,954
    Dynacast International LLC, Term Loan, 13.864%, (SOFR + 9.25%), 10/22/25         159     154,961
    Minerals Technologies, Inc., Term Loan, 6.339%, (SOFR + 2.00%), 11/21/31         150     150,750
    PMHC II, Inc., Term Loan, 9.058%, (SOFR + 4.25%), 4/23/29         516     509,415
    WireCo WorldGroup, Inc., Term Loan, 8.382%, (SOFR + 3.75%), 11/13/28         108     101,655
          $  1,639,735
     
    14
    See Notes to Financial Statements.

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Portfolio of Investments (Unaudited) — continued

    Borrower/Description Principal
    Amount*
    (000's omitted)
    Value
    Oil, Gas & Consumable Fuels — 1.7%
    Epic Crude Services LP, Term Loan, 7.656%, (SOFR + 3.00%), 10/15/31         175 $    176,750
    Freeport LNG Investments LLLP, Term Loan, 8.379%, (SOFR + 3.50%), 12/21/28         348     350,290
    ITT Holdings LLC, Term Loan, 7.107%, (SOFR + 2.75%), 10/11/30         247     248,705
    Matador Bidco SARL, Term Loan, 8.707%, (SOFR + 4.25%), 7/30/29         670     676,317
    Oryx Midstream Services Permian Basin LLC, Term Loan, 7.512%, (SOFR + 3.00%), 10/5/28         241     242,927
    Oxbow Carbon LLC, Term Loan, 7.857%, (SOFR + 3.50%), 5/10/30         148     147,935
          $  1,842,924
    Passenger Airlines — 0.2%
    WestJet Loyalty LP, Term Loan, 7.579%, (SOFR + 3.25%), 2/14/31         248 $    249,455
          $    249,455
    Personal Products — 0.3%
    Olaplex, Inc., Term Loan, 7.957%, (SOFR + 3.50%), 2/23/29         343 $    326,194
          $    326,194
    Pharmaceuticals — 1.0%
    Jazz Financing Lux SARL, Term Loan, 6.607%, (SOFR + 2.25%), 5/5/28         651 $    653,611
    Mallinckrodt International Finance SA, Term Loan - Second Lien, 14.00%, (SOFR + 9.50%), 11/14/28         406     432,778
          $  1,086,389
    Professional Services — 6.2%
    AAL Delaware Holdco, Inc., Term Loan, 7.857%, (SOFR + 3.50%), 7/30/31         200 $    201,371
    AlixPartners LLP, Term Loan, 5.683%, (3 mo. EURIBOR + 3.00%), 2/4/28 EUR       241     250,164
    Camelot U.S. Acquisition LLC, Term Loan, 7.107%, (SOFR + 2.75%), 1/31/31         395     394,886
    CoreLogic, Inc., Term Loan, 7.972%, (SOFR + 3.50%), 6/2/28         489     483,357
    Deerfield Dakota Holding LLC, Term Loan, 8.079%, (SOFR + 3.75%), 4/9/27         497     487,605
    EAB Global, Inc., Term Loan, 7.607%, (SOFR + 3.25%), 8/16/28         791     795,037
    Employbridge Holding Co., Term Loan, 9.621%, (SOFR + 4.75%), 7/19/28         582      386,716
    Borrower/Description Principal
    Amount*
    (000's omitted)
    Value
    Professional Services (continued)
    First Advantage Holdings LLC, Term Loan, 7.607%, (SOFR + 3.25%), 10/31/31         450 $    455,344
    Fleet Midco I Ltd., Term Loan, 7.578%, (SOFR + 2.75%), 2/21/31         182     183,744
    Galaxy Bidco Ltd., Term Loan, 12/19/29(11) EUR       400     416,088
    Genuine Financial Holdings LLC, Term Loan, 8.357%, (SOFR + 4.00%), 9/27/30         123     124,980
    Lernen Bidco Ltd., Term Loan, 8.589%, (SOFR + 4.00%), 10/27/31         150     151,875
    Neptune Bidco U.S., Inc., Term Loan, 9.758%, (SOFR + 5.00%), 4/11/29         591     532,006
    Planet U.S. Buyer LLC, Term Loan, 7.521%, (SOFR + 3.00%), 2/7/31         323     326,559
    Stepstone Group Midco 2 GmbH, Term Loan, 12/4/31(11)         225     222,750
    Techem Verwaltungsgesellschaft 675 GmbH, Term Loan, 6.782%, (3 mo. EURIBOR + 3.75%), 7/15/29 EUR       425     443,624
    Teneo Holdings LLC, Term Loan, 9.107%, (SOFR + 4.75%), 3/13/31         348     351,247
    Tidal Waste & Recycling Holdings LLC, Term Loan, 7.829%, (SOFR + 3.50%), 10/24/31         175     176,586
    Vaco Holdings LLC, Term Loan, 9.479%, (SOFR + 5.00%), 1/21/29         492     457,099
          $  6,841,038
    Real Estate Management & Development — 1.2%
    Greystar Real Estate Partners LLC, Term Loan, 7.089%, (SOFR + 2.75%), 8/21/30       1,067 $  1,076,411
    Homeserve USA Holding Corp., Term Loan, 6.37%, (SOFR + 2.00%), 10/21/30         273     273,518
          $  1,349,929
    Road & Rail — 0.4%
    First Student Bidco, Inc.:       
    Term Loan, 6.892%, (SOFR + 2.50%), 7/21/28         214 $    215,079
    Term Loan, 6.892%, (SOFR + 2.50%), 7/21/28          66      65,773
    Hertz Corp., Term Loan, 8.089%, (SOFR + 3.75%), 6/30/28         198     179,520
          $    460,372
    Semiconductors & Semiconductor Equipment — 0.7%
    Altar Bidco, Inc.:       
    Term Loan, 7.247%, (SOFR + 3.10%), 2/1/29         611 $    610,463
    Term Loan - Second Lien, 9.747%, (SOFR + 5.60%), 2/1/30         125     121,406
    Bright Bidco BV, Term Loan, 12.585%, (SOFR + 8.00%), 10/31/27         199      98,533
          $    830,402
     
    15
    See Notes to Financial Statements.

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Portfolio of Investments (Unaudited) — continued

    Borrower/Description Principal
    Amount*
    (000's omitted)
    Value
    Software — 16.9%
    Applied Systems, Inc., Term Loan, 7.329%, (SOFR + 3.00%), 2/24/31         198 $    199,651
    Astra Acquisition Corp.:       
    Term Loan, 9.579%, (SOFR + 5.25%), 10/25/28         213      15,645
    Term Loan, 11.079%, (SOFR + 6.75%), 2/25/28         153     102,646
    Term Loan, 17.649%, (SOFR + 13.32%), 10/25/29         325      24,355
    Boxer Parent Co., Inc.:       
    Term Loan, 7.056%, (3 mo. EURIBOR + 4.00%), 7/30/31 EUR       119     124,540
    Term Loan, 8.335%, (SOFR + 3.75%), 7/30/31         958     966,909
    Central Parent, Inc., Term Loan, 7.579%, (SOFR + 3.25%), 7/6/29         569     562,467
    Cloud Software Group, Inc., Term Loan, 7.829%, (SOFR + 3.50%), 3/30/29         995     998,770
    Cloudera, Inc.:       
    Term Loan, 8.207%, (SOFR + 3.75%), 10/8/28         978     977,566
    Term Loan - Second Lien, 10.457%, (SOFR + 6.00%), 10/8/29         200     196,750
    Clover Holdings SPV III LLC, Term Loan, 15.00%, 12/18/27(13)          40      40,455
    Constant Contact, Inc., Term Loan, 8.918%, (SOFR + 4.00%), 2/10/28         397     357,088
    Cornerstone OnDemand, Inc., Term Loan, 8.222%, (SOFR + 3.75%), 10/16/28         340     300,551
    Dragon Buyer, Inc., Term Loan, 7.579%, (SOFR + 3.25%), 9/30/31         400     401,332
    Drake Software LLC, Term Loan, 8.607%, (SOFR + 4.25%), 6/26/31         549     534,909
    E2open LLC, Term Loan, 7.972%, (SOFR + 3.50%), 2/4/28         908     913,047
    ECI Macola Max Holding LLC, Term Loan, 7.579%, (SOFR + 3.25%), 5/9/30         626     632,730
    Epicor Software Corp., Term Loan, 7.107%, (SOFR + 2.75%), 5/30/31         976     984,487
    Fiserv Investment Solutions, Inc., Term Loan, 8.521%, (SOFR + 4.00%), 2/18/27         442     427,147
    iSolved, Inc., Term Loan, 7.607%, (SOFR + 3.25%), 10/15/30         149     150,855
    Ivanti Software, Inc., Term Loan, 9.121%, (SOFR + 4.25%), 12/1/27         207     143,602
    Marcel LUX IV SARL, Term Loan, 8.07%, (SOFR + 3.50%), 11/9/30         373     378,724
    McAfee LLC, Term Loan, 7.37%, (SOFR + 3.00%), 3/1/29         686     687,488
    OceanKey (U.S.) II Corp., Term Loan, 7.957%, (SOFR + 3.50%), 12/15/28         146     146,574
    Open Text Corp., Term Loan, 6.107%, (SOFR + 1.75%), 1/31/30         415      415,445
    Borrower/Description Principal
    Amount*
    (000's omitted)
    Value
    Software (continued)
    Proofpoint, Inc., Term Loan, 7.357%, (SOFR + 3.00%), 8/31/28         970 $    975,995
    Quartz Acquireco LLC, Term Loan, 7.079%, (SOFR + 2.75%), 6/28/30         718     724,705
    Quest Software U.S. Holdings, Inc., Term Loan, 8.792%, (SOFR + 4.25%), 2/1/29         394     256,726
    RealPage, Inc.:       
    Term Loan, 7.59%, (SOFR + 3.00%), 4/24/28         497     497,176
    Term Loan, 8.079%, (SOFR + 3.75%), 4/24/28         125     125,743
    Redstone Holdco 2 LP, Term Loan, 9.597%, (SOFR + 4.75%), 4/27/28         428     259,290
    Sabre GLBL, Inc.:       
    Term Loan, 8.707%, (SOFR + 4.25%), 6/30/28         151     147,615
    Term Loan, 10.457%, (SOFR + 6.00%), 11/15/29         849     846,673
    Skillsoft Corp., Term Loan, 9.722%, (SOFR + 5.25%), 7/14/28         295     259,912
    SolarWinds Holdings, Inc., Term Loan, 7.107%, (SOFR + 2.75%), 2/5/30         447     449,510
    Sophia LP, Term Loan, 7.357%, (SOFR + 3.00%), 10/9/29       1,060   1,068,951
    UKG, Inc., Term Loan, 7.329%, (SOFR + 3.00%), 2/10/31       1,312   1,322,967
    Veritas U.S., Inc., Term Loan, 16.928%, (SOFR + 12.50%), 12/9/29         120     119,919
    Vision Solutions, Inc., Term Loan, 8.847%, (SOFR + 4.00%), 4/24/28       1,070   1,055,833
          $ 18,794,748
    Specialty Retail — 4.8%
    Apro LLC, Term Loan, 8.266%, (SOFR + 3.75%), 7/9/31         175 $    176,490
    Boels Topholding BV, Term Loan, 6.04%, (3 mo. EURIBOR + 3.00%), 5/23/31 EUR       237     247,563
    Great Outdoors Group LLC, Term Loan, 8.222%, (SOFR + 3.75%), 3/6/28       1,248   1,256,743
    Harbor Freight Tools USA, Inc., Term Loan, 6.902%, (SOFR + 2.50%), 6/11/31(12)         599     591,132
    Hoya Midco LLC, Term Loan, 7.585%, (SOFR + 3.00%), 2/3/29         498     503,097
    Les Schwab Tire Centers, Term Loan, 7.357%, (SOFR + 3.00%), 4/23/31         859     864,602
    LIDS Holdings, Inc., Term Loan, 10.001%, (SOFR + 5.50%), 12/14/26          48      47,268
    Mattress Firm, Inc., Term Loan, 8.924%, (SOFR + 4.25%), 9/25/28         773      773,627
     
    16
    See Notes to Financial Statements.

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Portfolio of Investments (Unaudited) — continued

    Borrower/Description Principal
    Amount*
    (000's omitted)
    Value
    Specialty Retail (continued)
    PetSmart, Inc., Term Loan, 8.207%, (SOFR + 3.75%), 2/11/28         619 $    618,008
    Speedster Bidco GmbH, Term Loan, 10/17/31(11)         250     250,990
          $  5,329,520
    Trading Companies & Distributors — 3.0%
    Beacon Roofing Supply, Inc., Term Loan, 6.357%, (SOFR + 2.00%), 5/19/28         149 $    149,203
    DXP Enterprises, Inc., Term Loan, 8.107%, (SOFR + 3.75%), 10/11/30         198     200,221
    Foundation Building Materials Holding Co. LLC, Term Loan, 8.585%, (SOFR + 4.00%), 1/29/31         347     342,817
    Patagonia Bidco Ltd., Term Loan, 10.20%, (SONIA + 5.25%), 11/1/28 GBP       375     427,744
    Spin Holdco, Inc., Term Loan, 8.706%, (SOFR + 4.00%), 3/4/28       1,238   1,048,478
    White Cap Buyer LLC, Term Loan, 7.607%, (SOFR + 3.25%), 10/19/29         867     870,189
    Windsor Holdings III LLC, Term Loan, 7.856%, (SOFR + 3.50%), 8/1/30         321     325,430
          $  3,364,082
    Transportation Infrastructure — 0.9%
    Brown Group Holding LLC, Term Loan, 7.002%, (SOFR + 2.50%), 7/1/31(12)         499 $    500,793
    KKR Apple Bidco LLC, Term Loan, 7.857%, (SOFR + 3.50%), 9/22/28         496     500,109
          $  1,000,902
    Wireless Telecommunication Services — 0.4%
    CCI Buyer, Inc., Term Loan, 8.329%, (SOFR + 4.00%), 12/17/27         490 $    491,242
    Digicel International Finance Ltd., Term Loan, 11.335%, (SOFR + 6.75%), 5/25/27          12      11,474
          $    502,716
    Total Senior Floating-Rate Loans
    (identified cost $151,419,508)
        $148,676,412
        
    Warrants — 0.0%
    Security Shares Value
    Health Care — 0.0%
    Cano Health, Inc., Exp. 6/28/29(3)(4)       1,346 $          0
    Total Warrants
    (identified cost $0)
        $          0
        
    Miscellaneous — 0.0%
    Security Shares Value
    Cable and Satellite Television — 0.0%
    ACC Claims Holdings LLC(3)(4)     200,340 $          0
    Total Miscellaneous
    (identified cost $0)
        $          0
        
    Short-Term Investments — 3.0%
    Security Shares Value
    Morgan Stanley Institutional Liquidity Funds - Government Portfolio, Institutional Class, 4.43%(14)   3,313,614 $  3,313,614
    Total Short-Term Investments
    (identified cost $3,313,614)
        $  3,313,614
    Total Investments — 151.1%
    (identified cost $171,272,071)
        $167,960,052
    Less Unfunded Loan Commitments — (0.2)%     $   (217,704)
    Net Investments — 150.9%
    (identified cost $171,054,367)
        $167,742,348
    Other Assets, Less Liabilities — (50.9)%     $(56,587,991)
    Net Assets Applicable to Common Shares — 100.0%     $111,154,357
    The percentage shown for each investment category in the Portfolio of Investments is based on net assets applicable to common shares.
    * In U.S. dollars unless otherwise indicated.
    (1) Security exempt from registration under Rule 144A of the Securities Act of 1933, as amended. These securities may be sold in certain transactions in reliance on an exemption from registration (normally to qualified institutional buyers). At December 31, 2024, the aggregate value of these securities is $12,894,099 or 11.6% of the Trust's net assets applicable to common shares.
    (2) Variable rate security. The stated interest rate represents the rate in effect at December 31, 2024.
    (3) For fair value measurement disclosure purposes, security is categorized as Level 3 (see Note 10).
     
    17
    See Notes to Financial Statements.

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Portfolio of Investments (Unaudited) — continued

    (4) Non-income producing security.
    (5) Security was acquired in connection with a restructuring of a Senior Loan and may be subject to restrictions on resale.
    (6) Amount is less than 0.05%.
    (7) Issuer is in default with respect to interest and/or principal payments or has declared bankruptcy and is non-income producing. For a variable rate security, interest rate has been adjusted to reflect non-accrual status.
    (8) Principal amount is less than $500.
    (9) Senior floating-rate loans (Senior Loans) often require prepayments from excess cash flows or permit the borrowers to repay at their election. The degree to which borrowers repay, whether as a contractual requirement or at their election, cannot be predicted with accuracy. As a result, the actual remaining maturity may be substantially less than the stated maturities shown. However, Senior Loans will typically have an expected average life of approximately two to four years. Senior Loans typically have rates of interest which are redetermined periodically by reference to a base lending rate, plus a spread. These base lending rates are primarily the Secured Overnight Financing Rate (“SOFR”) and secondarily, the prime rate offered by one or more major United States banks (the “Prime Rate”). Base lending rates may be subject to a floor, or minimum rate. Rates for SOFR are generally 1 or 3-month tenors and may also be subject to a credit spread adjustment. Senior Loans are generally subject to contractual restrictions that must be satisfied before they can be bought or sold.
    (10) Unfunded or partially unfunded loan commitments. The stated interest rate reflects the weighted average of the reference rate and spread for the funded portion, if any, and the commitment fees on the portion of the loan that is unfunded. At December 31, 2024, the total value of unfunded loan commitments is $220,569. See Note 1F for description.
    (11) This Senior Loan will settle after December 31, 2024, at which time the interest rate will be determined.
    (12) The stated interest rate represents the weighted average interest rate at December 31, 2024 of contracts within the senior loan facility. Interest rates on contracts are primarily redetermined either monthly or quarterly by reference to the indicated base lending rate and spread and the reset period.
    (13) Fixed-rate loan.
    (14) May be deemed to be an affiliated investment company (see Note 9). The rate shown is the annualized seven-day yield as of December 31, 2024.
     
    Forward Foreign Currency Exchange Contracts (OTC) 
    Currency Purchased Currency Sold Counterparty Settlement
    Date
    Unrealized
    Appreciation
    Unrealized
    (Depreciation)
    USD 3,302,511 EUR 3,122,552 Standard Chartered Bank 1/3/25 $ 68,017 $   —
    USD 3,237,473 EUR 3,122,551 Standard Chartered Bank 2/4/25     — (1,144)
    USD   540,079 EUR   509,868 Australia and New Zealand Banking Group Limited 2/28/25  10,679    —
    USD   528,349 EUR   499,000 Australia and New Zealand Banking Group Limited 2/28/25  10,233    —
    USD   527,094 EUR   498,000 HSBC Bank USA, N.A. 2/28/25  10,017    —
    USD   529,068 EUR   499,000 Standard Chartered Bank 2/28/25  10,952    —
    USD   528,505 EUR   499,000 Standard Chartered Bank 2/28/25  10,390    —
    USD 1,325,402 GBP 1,048,765 HSBC Bank USA, N.A. 2/28/25  13,021    —
    USD   872,748 EUR   833,433 Goldman Sachs International 3/31/25   6,033    —
    USD   862,485 EUR   823,600 State Street Bank and Trust Company 3/31/25   5,997    —
    USD   575,226 EUR   549,100 State Street Bank and Trust Company 3/31/25   4,199    —
                $149,538 $(1,144)
    Abbreviations:
    EURIBOR – Euro Interbank Offered Rate
    OTC – Over-the-counter
    PCL – Public Company Limited
    PIK – Payment In Kind
    SOFR – Secured Overnight Financing Rate
    SONIA – Sterling Overnight Interbank Average
    Currency Abbreviations:
    EUR – Euro
    GBP – British Pound Sterling
    USD – United States Dollar
     
    18
    See Notes to Financial Statements.

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Statement of Assets and Liabilities (Unaudited)

      December 31, 2024
    Assets  
    Unaffiliated investments, at value (identified cost $167,740,753) $164,428,734
    Affiliated investments, at value (identified cost $3,313,614) 3,313,614
    Cash 1,257,960
    Deposits for derivatives collateral — forward foreign currency exchange contracts 110,000
    Foreign currency, at value (identified cost $1,558,693) 1,545,085
    Interest receivable 1,114,401
    Dividends receivable from affiliated investments 11,221
    Receivable for investments sold 1,194,374
    Receivable for open forward foreign currency exchange contracts 149,538
    Trustees' deferred compensation plan 94,709
    Prepaid upfront fees on notes payable  5,792
    Prepaid expenses 1,763
    Total assets $173,227,191
    Liabilities  
    Notes payable $21,000,000
    Cash collateral due to broker 110,000
    Payable for investments purchased 2,776,369
    Payable for open forward foreign currency exchange contracts 1,144
    Payable to affiliates:  
     Investment adviser fee 100,494
    Administration fee 36,016
    Trustees' fees 2,536
    Trustees' deferred compensation plan 94,709
    Accrued expenses 320,015
    Total liabilities $24,441,283
    Auction preferred shares (1,504 shares outstanding) at liquidation value plus cumulative unpaid dividends $37,631,551
    Commitments and contingencies (see Note 13)  
    Net assets applicable to common shares $111,154,357
    Sources of Net Assets  
    Common shares, $0.01 par value, unlimited number of shares authorized $180,841
    Additional paid-in capital 143,084,557
    Accumulated loss (32,111,041)
    Net assets applicable to common shares $111,154,357
    Common Shares Issued and Outstanding 18,084,100
    Net Asset Value Per Common Share  
    Net assets ÷ common shares issued and outstanding $6.15
    19
    See Notes to Financial Statements.

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Statement of Operations (Unaudited)

      Six Months Ended
      December 31, 2024
    Investment Income  
    Dividend income from affiliated investments $147,852
    Interest income 7,719,624
    Other income 87,868
    Total investment income $7,955,344
    Expenses  
    Investment adviser fee $584,068
    Administration fee 208,596
    Trustees’ fees and expenses 4,996
    Custodian fee 50,718
    Transfer and dividend disbursing agent fees 7,278
    Legal and accounting services 91,807
    Printing and postage 54,170
    Interest expense and fees 557,040
    Preferred shares service fee 16,304
    Miscellaneous 30,592
    Total expenses $1,605,569
    Deduct:  
    Waiver and/or reimbursement of expenses by affiliates $8,335
    Total expense reductions $8,335
    Net expenses $1,597,234
    Net investment income $6,358,110
    Realized and Unrealized Gain (Loss)  
    Net realized gain (loss):  
    Investment transactions $(485,418)
    Foreign currency transactions (16,512)
    Forward foreign currency exchange contracts 310,708
    Net realized loss $(191,222)
    Change in unrealized appreciation (depreciation):  
    Investments $362,157
    Foreign currency 3,621
    Forward foreign currency exchange contracts 47,265
    Net change in unrealized appreciation (depreciation) $413,043
    Net realized and unrealized gain $221,821
    Distributions to preferred shareholders $(1,201,235)
    Net increase in net assets from operations $5,378,696
    20
    See Notes to Financial Statements.

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Statements of Changes in Net Assets

      Six Months Ended
    December 31, 2024
    (Unaudited)
    Year Ended
    June 30, 2024
    Increase (Decrease) in Net Assets    
    From operations:    
    Net investment income $6,358,110 $13,129,789
    Net realized loss (191,222) (4,548,839)
    Net change in unrealized appreciation (depreciation) 413,043 5,978,001
    Distributions to preferred shareholders (1,201,235) (2,534,053)
    Net increase in net assets from operations $5,378,696 $12,024,898
    Distributions to common shareholders* $(5,681,645) $(11,363,282)
    Tax return of capital to common shareholders $— $(366,351)
    Capital share transactions:    
    Proceeds from shelf offering, net of offering costs (see Note 6) $4,216,649 $10,090,739
    Reinvestment of distributions to common shareholders 104,871 151,135
    Cost of shares repurchased in tender offer (see Note 6) — (10,480,521)
    Net increase (decrease) in net assets from capital share transactions $4,321,520 $(238,647)
    Net increase in net assets $4,018,571 $56,618
    Net Assets Applicable to Common Shares    
    At beginning of period $107,135,786 $107,079,168
    At end of period $111,154,357 $107,135,786
    * A portion of the distributions may be deemed a tax return of capital at year-end. See Note 3.
    21
    See Notes to Financial Statements.

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Statement of Cash Flows (Unaudited)

      Six Months Ended
      December 31, 2024
    Cash Flows From Operating Activities  
    Net increase in net assets from operations $5,378,696
    Distributions to preferred shareholders 1,201,235
    Net increase in net assets from operations excluding distributions to preferred shareholders $6,579,931
    Adjustments to reconcile net increase in net assets from operations to net cash used in operating activities:  
    Investments purchased (34,739,413)
    Investments sold and principal repayments 18,915,519
    Decrease in short-term investments, net 1,225,134
    Net amortization/accretion of premium (discount) (300,300)
    Amortization of prepaid upfront fees on notes payable 8,832
    Decrease in interest receivable 69,098
    Decrease in dividends receivable from affiliated investments 11,720
    Increase in Trustees’ deferred compensation plan (3,967)
    Decrease in prepaid expenses 12,581
    Increase in cash collateral due to broker 110,000
    Increase in payable to affiliates for investment adviser fee 11,271
    Increase in payable to affiliates for administration fee 3,925
    Decrease in payable to affiliates for Trustees' fees (78)
    Increase in payable to affiliates for Trustees' deferred compensation plan 3,967
    Increase in accrued expenses 20,512
    Increase in unfunded loan commitments 114,928
    Net change in unrealized (appreciation) depreciation from investments (362,157)
    Net change in unrealized (appreciation) depreciation from forward foreign currency exchange contracts (OTC) (47,265)
    Net realized loss from investments 485,418
    Net cash used in operating activities $(7,880,344)
    Cash Flows From Financing Activities  
    Cash distributions paid to common shareholders $(5,576,774)
    Cash distributions paid to preferred shareholders (1,197,507)
    Proceeds from shelf offering, net of offering costs (see Note 6) 4,311,076
    Proceeds from notes payable 9,000,000
    Net cash provided by financing activities $6,536,795
    Net decrease in cash* $(1,343,549)
    Cash at beginning of period (including foreign currency) $4,256,594
    Cash and restricted cash at end of period (including foreign currency) $2,913,045
    Supplemental disclosure of cash flow information:  
    Noncash financing activities not included herein consist of:  
    Reinvestment of dividends and distributions $104,871
    Cash paid for interest and fees on borrowings 516,162
    * Includes net change in unrealized (appreciation) depreciation on foreign currency of $6,432.
    22
    See Notes to Financial Statements.

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Statement of Cash Flows (Unaudited) — continued

    The following table provides a reconciliation of cash and restricted cash reported within the Statement of Assets and Liabilities that sum to the total of such amounts shown on the Statement of Cash Flows.
       
      December 31, 2024
    Cash $1,257,960
    Deposits for derivatives collateral — forward foreign currency exchange contracts 110,000
    Foreign currency 1,545,085
    Total cash and restricted cash as shown on the Statement of Cash Flows $2,913,045
    23
    See Notes to Financial Statements.

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Financial Highlights

    Selected data for a common share outstanding during the periods stated
      Six Months Ended
    December 31, 2024
    (Unaudited)
    Year Ended June 30,
      2024 2023 2022 2021 2020
    Net asset value — Beginning of period (Common shares) $6.16 $6.11 $6.06 $6.90 $6.20 $7.05
    Income (Loss) From Operations            
    Net investment income(1) $0.35 $0.79 $0.67 $0.36 $0.41 $0.40
    Net realized and unrealized gain (loss) 0.02 0.09 0.04 (0.87) 0.70 (0.82)
    Distributions to preferred shareholders:
    From net investment income(1)
    (0.07) (0.15) (0.10) (0.01) (0.00)(2) (0.02)
    Total income (loss) from operations $0.30 $0.73 $0.61 $(0.52) $1.11 $(0.44)
    Less Distributions to Common Shareholders            
    From net investment income $(0.32)* $(0.68) $(0.56) $(0.37) $(0.41) $(0.41)
    Tax return of capital — (0.02) — (0.02) — —
    Total distributions to common shareholders $(0.32) $(0.70) $(0.56) $(0.39) $(0.41) $(0.41)
    Premium from common shares sold through shelf offering (see Note 6)(1) $0.01 $0.01 $— $— $— $—
    Discount on tender offer (see Note 6)(1) $— $0.01 $— $0.07 $— $—
    Net asset value — End of period (Common shares) $6.15 $6.16 $6.11 $6.06 $6.90 $6.20
    Market value — End of period (Common shares) $6.14 $6.34 $5.46 $5.46 $6.80 $5.33
    Total Investment Return on Net Asset Value(3) 5.12%(4) 13.22% 11.71% (6.68)%(5) 18.65% (5.64)%
    Total Investment Return on Market Value(3) 1.97%(4) 30.40% 10.80% (14.68)% 36.01% (8.20)%
    24
    See Notes to Financial Statements.

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Financial Highlights — continued

    Selected data for a common share outstanding during the periods stated
      Six Months Ended
    December 31, 2024
    (Unaudited)
    Year Ended June 30,
      2024 2023 2022 2021 2020
    Ratios/Supplemental Data            
    Net assets applicable to common shares, end of period (000’s omitted) $111,154 $107,136 $107,079 $106,208 $261,425 $234,657
    Ratios (as a percentage of average daily net assets applicable to common shares):(6)†            
    Expenses excluding interest and fees 1.88%(7)(8) 2.00%(8) 1.99%(8) 1.91% 1.96% 1.73%
    Interest and fee expense(9) 1.00%(7) 1.21% 1.05% 0.47% 0.57% 1.19%
    Total expenses 2.88%(7)(8) 3.21%(8) 3.04%(8) 2.38% 2.53% 2.92%
    Net investment income 11.46%(7) 12.72% 11.15% 5.31% 6.08% 5.93%
    Portfolio Turnover 12%(4) 34% 27% 43% 40% 57%
    Senior Securities:            
    Total notes payable outstanding (in 000’s) $21,000 $12,000 $20,000 $26,000 $103,000 $95,000
    Asset coverage per $1,000 of notes payable(10) $8,085 $13,064 $8,235 $6,531 $3,903 $3,866
    Total preferred shares outstanding 1,504 1,504 1,504 1,504 1,504 1,504
    Asset coverage per preferred share(11) $72,434 $79,014 $71,481 $66,752 $71,484 $69,242
    Involuntary liquidation preference per preferred share(12) $25,000 $25,000 $25,000 $25,000 $25,000 $25,000
    Approximate market value per preferred share(12) $25,000 $25,000 $25,000 $25,000 $25,000 $25,000
    (1) Computed using average common shares outstanding.
    (2) Amount is less than $(0.005).
    (3) Returns are historical and are calculated by determining the percentage change in net asset value or market value with all distributions reinvested. Distributions are assumed to be reinvested at prices obtained under the Trust’s dividend reinvestment plan.
    (4) Not annualized.
    (5) The total return based on net asset value reflects the impact of the tender and repurchase by the Trust of a portion of its common shares at 99% of the Trust’s net asset value per common share. Absent this transaction, the total return based on net asset value would have been (7.90)%.
    (6) Ratios do not reflect the effect of dividend payments to preferred shareholders.
    (7) Annualized.
    (8) Includes a reduction by the investment adviser of a portion of its adviser fee due to the Trust’s investment in the Liquidity Fund (equal to less than 0.02%, less than 0.01% and less than 0.005% of average daily net assets for the six months ended December 31, 2024 and the years ended June 30, 2024 and 2023, respectively).
    (9) Interest and fee expense relates to the notes payable to partially redeem the Trust’s Auction Preferred Shares and/or to fund investments (see Note 8).
    (10) Calculated by subtracting the Trust’s total liabilities (not including the notes payable and preferred shares) from the Trust’s total assets, and dividing the result by the notes payable balance in thousands.
    (11) Calculated by subtracting the Trust’s total liabilities (not including the notes payable and preferred shares) from the Trust’s total assets, dividing the result by the sum of the value of the notes payable and liquidation value of the preferred shares, and multiplying the result by the liquidation value of one preferred share.
    (12) Plus accumulated and unpaid dividends.
    * A portion of the distributions may be deemed a tax return of capital at year-end. See Note 3.
    † Ratios based on net assets applicable to common shares plus preferred shares and borrowings are presented below. Ratios do not reflect the effect of dividend payments to preferred shareholders. Ratios for periods less than one year are annualized.
      Six Months Ended
    December 31, 2024
    (Unaudited)
    Year Ended June 30,
      2024 2023 2022 2021 2020
    Expenses excluding interest and fees     1.24%   1.30%   1.29%    1.28%   1.25%   1.11%
    Interest and fee expense     0.67%   0.78%   0.68%    0.32%   0.36%   0.76%
    Total expenses     1.91%   2.08%   1.97%    1.60%   1.61%   1.87%
    Net investment income 7.61% 8.23% 7.23% 3.57% 3.87% 3.81%
    25
    See Notes to Financial Statements.

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Notes to Financial Statements (Unaudited)

    1  Significant Accounting Policies
    Eaton Vance Senior Income Trust (the Trust) is a Massachusetts business trust registered under the Investment Company Act of 1940, as amended (the 1940 Act), as a diversified, closed-end management investment company. The Trust’s investment objective is to provide a high level of current income, consistent with the preservation of capital, by investing primarily in senior, secured floating-rate loans.
    The following is a summary of significant accounting policies of the Trust. The policies are in conformity with accounting principles generally accepted in the United States of America (U.S. GAAP). The Trust is an investment company and follows accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946. 
    A  Investment Valuation—The following methodologies are used to determine the market value or fair value of investments.
    Senior Floating-Rate Loans. Interests in senior floating-rate loans (Senior Loans) are valued generally at the average mean of bid and ask quotations obtained from a third party pricing service. Senior Loans, for which a valuation is not available or deemed unreliable, are fair valued by the investment adviser utilizing one or more of the valuation techniques described below to assess the likelihood that the borrower will make a full repayment of the loan underlying such Senior Loan. If the investment adviser believes that there is a reasonable likelihood of full repayment, the investment adviser will determine fair value using a matrix pricing approach that considers the yield on the Senior Loan relative to yields on other Senior Loans issued by companies of comparable credit quality. If the investment adviser believes there is not a reasonable likelihood of full repayment, the investment adviser will determine fair value using analyses that include, but are not limited to: (i) a comparison of the value of the borrower’s outstanding equity and debt to that of comparable public companies; (ii) a discounted cash flow analysis; or (iii) when the investment adviser believes it is likely that a borrower will be liquidated or sold, an analysis of the terms of such liquidation or sale. In certain cases, the investment adviser will use a combination of analytical methods to determine fair value, such as when only a portion of a borrower’s assets are likely to be sold. In conducting its assessment and analyses for purposes of determining fair value of a Senior Loan, the investment adviser will use its discretion and judgment in considering and appraising relevant factors. Junior Loans (i.e., subordinated loans and second lien loans) are valued in the same manner as Senior Loans.
    Debt Obligations. Debt obligations are generally valued on the basis of valuations provided by third party pricing services, as derived from such services’ pricing models. Inputs to the models may include, but are not limited to, reported trades, executable bid and ask prices, broker/dealer quotations, prices or yields of securities with similar characteristics, interest rates, anticipated prepayments, benchmark curves or information pertaining to the issuer, as well as industry and economic events. The pricing services may use a matrix approach, which considers information regarding securities with similar characteristics to determine the valuation for a security. Short-term debt obligations purchased with a remaining maturity of sixty days or less for which a valuation from a third party pricing service is not readily available may be valued at amortized cost, which approximates fair value.
    Equity Securities. Equity securities listed on a U.S. securities exchange generally are valued at the last sale or closing price on the day of valuation or, if no sales took place on such date, at the mean between the closing bid and ask prices on the exchange where such securities are principally traded. Equity securities listed on the NASDAQ National Market System are valued at the NASDAQ official closing price. Unlisted or listed securities for which closing sales prices or closing quotations are not available are valued at the mean between the latest available bid and ask prices or, in the case of preferred equity securities that are not listed or traded in the over-the-counter market, by a third party pricing service that uses various techniques that consider factors including, but not limited to, prices or yields of securities with similar characteristics, benchmark yields, broker/dealer quotes, quotes of underlying common stock, issuer spreads, as well as industry and economic events.
    Derivatives. Forward foreign currency exchange contracts are generally valued at the mean of the average bid and average ask prices that are reported by currency dealers to a third party pricing service at the valuation time. Such third party pricing service valuations are supplied for specific settlement periods and the Trust’s forward foreign currency exchange contracts are valued at an interpolated rate between the closest preceding and subsequent settlement period reported by the third party pricing service.
    Foreign Securities and Currencies. Foreign securities and currencies are valued in U.S. dollars, based on foreign currency exchange rate quotations supplied by a third party pricing service. The pricing service uses a proprietary model to determine the exchange rate. Inputs to the model include reported trades and implied bid/ask spreads.
    Other. Investments in management investment companies (including money market funds) that do not trade on an exchange are valued at the net asset value as of the close of each business day.
    Fair Valuation. In connection with Rule 2a-5 of the 1940 Act, the Trustees have designated the Trust’s investment adviser as its valuation designee. Investments for which valuations or market quotations are not readily available or are deemed unreliable are valued by the investment adviser, as valuation designee, at fair value using methods that most fairly reflect the security’s “fair value”, which is the amount that the Trust might reasonably expect to receive for the security upon its current sale in the ordinary course. Each such determination is based on a consideration of relevant factors, which are likely to vary from one pricing context to another. These factors may include, but are not limited to, the type of security, the existence of any contractual restrictions on the security’s disposition, the price and extent of public trading in similar securities of the issuer or of comparable companies or entities, quotations or relevant information obtained from broker/dealers or other market participants, information obtained from the issuer, analysts, and/or the appropriate stock exchange (for exchange-traded securities), an analysis of the company’s or entity’s financial statements, and an evaluation of the forces that influence the issuer and the market(s) in which the security is purchased and sold.
    26

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Notes to Financial Statements (Unaudited) — continued

    B  Investment Transactions—Investment transactions for financial statement purposes are accounted for on a trade date basis. Realized gains and losses on investments sold are determined on the basis of identified cost.
    C  Income—Interest income is recorded on the basis of interest accrued, adjusted for amortization of premium or accretion of discount. Fees in connection with investments in senior floating-rate loans may include amendment fees, consent fees and prepayment fees, which are recorded to income as earned and included in Other income on the Statement of Operations. Dividend income is recorded on the ex-dividend date for dividends received in cash and/or securities. Distributions from investment companies are recorded as dividend income, capital gains or return of capital based on the nature of the distribution.
    D  Federal Taxes—The Trust's policy is to comply with the provisions of the Internal Revenue Code applicable to regulated investment companies and to distribute to shareholders each year substantially all of its net investment income, and all or substantially all of its net realized capital gains. Accordingly, no provision for federal income or excise tax is necessary.
    As of December 31, 2024, the Trust had no uncertain tax positions that would require financial statement recognition, de-recognition, or disclosure. The Trust files a U.S. federal income tax return annually after its fiscal year-end, which is subject to examination by the Internal Revenue Service for a period of three years from the date of filing.
    E  Foreign Currency Translation—Investment valuations, other assets, and liabilities initially expressed in foreign currencies are translated each business day into U.S. dollars based upon current exchange rates. Purchases and sales of foreign investment securities and income and expenses denominated in foreign currencies are translated into U.S. dollars based upon currency exchange rates in effect on the respective dates of such transactions. Recognized gains or losses on investment transactions attributable to changes in foreign currency exchange rates are recorded for financial statement purposes as net realized gains and losses on investments. That portion of unrealized gains and losses on investments that results from fluctuations in foreign currency exchange rates is not separately disclosed.
    F  Unfunded Loan Commitments—The Trust may enter into certain loan agreements all or a portion of which may be unfunded. The Trust is obligated to fund these commitments at the borrower's discretion. These commitments are disclosed in the accompanying Portfolio of Investments. At December 31, 2024, the Trust had sufficient cash and/or securities to cover these commitments.
    G  Use of Estimates—The preparation of the financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of income and expense during the reporting period. Actual results could differ from those estimates.
    H  Indemnifications—Under the Trust’s organizational documents, its officers and Trustees may be indemnified against certain liabilities and expenses arising out of the performance of their duties to the Trust. Under Massachusetts law, if certain conditions prevail, shareholders of a Massachusetts business trust (such as the Trust) could be deemed to have personal liability for the obligations of the Trust. However, the Trust’s Declaration of Trust contains an express disclaimer of liability on the part of Trust shareholders and the By-laws provide that the Trust shall assume, upon request by the shareholder, the defense on behalf of any Trust shareholders. Moreover, the By-laws also provide for indemnification out of Trust property of any shareholder held personally liable solely by reason of being or having been a shareholder for all loss or expense arising from such liability. Additionally, in the normal course of business, the Trust enters into agreements with service providers that may contain indemnification clauses. The Trust's maximum exposure under these arrangements is unknown as this would involve future claims that may be made against the Trust that have not yet occurred.
    I  Forward Foreign Currency Exchange Contracts—The Trust may enter into forward foreign currency exchange contracts for the purchase or sale of a specific foreign currency at a fixed price on a future date. The forward foreign currency exchange contracts are adjusted by the daily exchange rate of the underlying currency and any gains or losses are recorded as unrealized until such time as the contracts have been closed. Risks may arise upon entering these contracts from the potential inability of counterparties to meet the terms of their contracts and from movements in the value of a foreign currency relative to the U.S. dollar.
    J  Interim Financial Statements—The interim financial statements relating to December 31, 2024 and for the six months then ended have not been audited by an independent registered public accounting firm, but in the opinion of the Trust’s management, reflect all adjustments, consisting only of normal recurring adjustments, necessary for the fair presentation of the financial statements.
    2  Auction Preferred Shares
    The Trust issued Auction Preferred Shares (APS) on July 27, 2001 in a public offering. Dividends on the APS, which accrue daily, are cumulative at rates which are reset every seven days by an auction, unless a special dividend period has been set. Series of APS are identical in all respects except for the reset dates of the dividend rates. If the APS auctions do not successfully clear, the dividend payment rate over the next period for the APS holders is set at a specified maximum applicable rate until such time as the APS auctions are successful. Auctions have not cleared since February 13, 2008 and the rate since that date has been the maximum applicable rate (see Note 3). The maximum applicable rate on the APS is 125% of the “AA” Financial Composite Commercial Paper Rate at the date of the auction. The stated spread over the reference benchmark rate is determined based on the credit rating of the APS.
    27

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Notes to Financial Statements (Unaudited) — continued

    The number of APS issued and outstanding as of December 31, 2024 are as follows:
      APS Issued and
    Outstanding
    Series A 752
    Series B 752
    The APS are redeemable at the option of the Trust at a redemption price equal to $25,000 per share, plus accumulated and unpaid dividends, on any dividend payment date. The APS are also subject to mandatory redemption at a redemption price equal to $25,000 per share, plus accumulated and unpaid dividends, if the Trust is in default for an extended period on its asset maintenance requirements with respect to the APS. If the dividends on the APS remain unpaid in an amount equal to two full years’ dividends, the holders of the APS as a class have the right to elect a majority of the Board of Trustees. In general, the holders of the APS and the common shares have equal voting rights of one vote per share, except that the holders of the APS, as a separate class, have the right to elect at least two members of the Board of Trustees. The APS have a liquidation preference of $25,000 per share, plus accumulated and unpaid dividends. The Trust is required to maintain certain asset coverage with respect to the APS as defined in the Trust's By-Laws and the 1940 Act. The Trust pays an annual fee up to 0.15% of the liquidation value of the APS to broker/dealers as a service fee if the auctions are unsuccessful; otherwise, the annual fee is 0.25%.
    3  Distributions to Shareholders and Income Tax Information
    The Trust intends to make monthly distributions of net investment income to common shareholders, after payment of any dividends on any outstanding APS. In addition, at least annually, the Trust intends to distribute all or substantially all of its net realized capital gains. Distributions to common shareholders are recorded on the ex-dividend date. Distributions to preferred shareholders are recorded daily and are payable at the end of each dividend period. The dividend rates for the APS at December 31, 2024, and the amount of dividends accrued (including capital gains, if any) to APS shareholders, average APS dividend rates (annualized), and dividend rate ranges for the six months then ended were as follows:
      APS Dividend
    Rates at
    December 31, 2024
    Dividends
    Accrued to
    APS
    Shareholders
    Average
    APS
    Dividend
    Rates
    Dividend
    Rate
    Ranges
    (%)
    Series A 5.49% $600,418 6.25% 5.49-6.68
    Series B 5.49 600,817 6.25 5.49-6.68
    Beginning February 13, 2008 and consistent with the patterns in the broader market for auction-rate securities, the Trust's APS auctions were unsuccessful in clearing due to an imbalance of sell orders over bids to buy the APS. As a result, the dividend rates of the APS were reset to the maximum applicable rates. The table above reflects such maximum dividend rate for each series as of December 31, 2024.
    Distributions to shareholders are determined in accordance with income tax regulations, which may differ from U.S. GAAP. As required by U.S. GAAP, only distributions in excess of tax basis earnings and profits are reported in the financial statements as a return of capital. Permanent differences between book and tax accounting relating to distributions are reclassified to paid-in capital. For tax purposes, distributions from short-term capital gains are considered to be from ordinary income. For the six months ended December 31, 2024, the amount of distributions estimated to be a tax return of capital was approximately $558,000. The final determination of tax characteristics of the Trust’s distributions will occur at the end of the year, at which time it will be reported to the shareholders.
    At June 30, 2024, the Trust, for federal income tax purposes, had deferred capital losses of $28,461,167 which would reduce its taxable income arising from future net realized gains on investment transactions, if any, to the extent permitted by the Internal Revenue Code, and thus would reduce the amount of distributions to shareholders, which would otherwise be necessary to relieve the Trust of any liability for federal income or excise tax. The deferred capital losses are treated as arising on the first day of the Trust’s next taxable year and retain the same short-term or long-term character as when originally deferred. Of the deferred capital losses at June 30, 2024, $1,220,538 are short-term and $27,240,629 are long-term.
    28

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Notes to Financial Statements (Unaudited) — continued

    The cost and unrealized appreciation (depreciation) of investments, including open derivative contracts, of the Trust at December 31, 2024, as determined on a federal income tax basis, were as follows:
    Aggregate cost $171,122,963
    Gross unrealized appreciation $2,362,375
    Gross unrealized depreciation (5,594,596)
    Net unrealized depreciation $(3,232,221)
    4  Investment Adviser Fee and Other Transactions with Affiliates
    The investment adviser fee is earned by Eaton Vance Management (EVM), an indirect, wholly-owned subsidiary of Morgan Stanley, as compensation for investment advisory services rendered to the Trust. The investment adviser fee is computed at an annual rate of 0.70% of the Trust’s average weekly gross assets and is payable monthly. The annual investment adviser fee rate shall be reduced to the following as of the stated date: May 1, 2025: 0.69% and May 1, 2026: 0.55%. Gross assets as referred to herein are calculated by deducting accrued liabilities of the Trust except the principal amount of any indebtedness for money borrowed, including debt securities issued by the Trust. For the six months ended December 31, 2024, the Trust’s investment adviser fee amounted to $584,068.
    The Trust may invest in a money market fund, the Institutional Class of the Morgan Stanley Institutional Liquidity Funds - Government Portfolio (the "Liquidity Fund"), an open-end management investment company managed by Morgan Stanley Investment Management Inc., a wholly-owned subsidiary of Morgan Stanley. The investment adviser fee paid by the Trust is reduced by an amount equal to its pro rata share of the advisory and administration fees paid by the Trust due to its investment in the Liquidity Fund. For the six months ended December 31, 2024, the investment adviser fee paid was reduced by $8,335 relating to the Trust’s investment in the Liquidity Fund. The administration fee is earned by EVM for administering the business affairs of the Trust and is computed at an annual rate of 0.25% of the Trust’s average weekly gross assets. For the six months ended December 31, 2024, the administration fee amounted to $208,596.
    Trustees and officers of the Trust who are members of EVM’s organization receive remuneration for their services to the Trust out of the investment adviser fee. Trustees of the Trust who are not affiliated with EVM may elect to defer receipt of all or a percentage of their annual fees in accordance with the terms of the Trustees Deferred Compensation Plan. Certain officers and Trustees of the Trust are officers of EVM.
    5  Purchases and Sales of Investments
    Purchases and sales of investments, other than short-term obligations and including maturities, paydowns and principal repayments on Senior Loans, aggregated $24,687,565 and $19,102,107, respectively, for the six months ended December 31, 2024.
    6  Common Shares of Beneficial Interest and Shelf Offering
    The Trust may issue common shares pursuant to its dividend reinvestment plan. Common shares issued by the Trust pursuant to its dividend reinvestment plan were 17,137 and 24,424 for the six months ended December 31, 2024 and for the year ended June 30, 2024, respectively.
    On May 12, 2021, the Trust announced that it will conduct cash tender offers in the fourth quarter of each of 2022, 2023 and 2024 (each, a “Conditional Tender Offer”) for up to 10% of the Trust’s then-outstanding common shares if, from January to August of the relevant year, the Trust’s shares trade at an average daily discount to NAV of more than 10%, based upon the Trust’s volume-weighted average market price and NAV on each business day during the period. If triggered, common shares tendered and accepted in a Conditional Tender Offer would be repurchased at a price per share equal to 98% of the Trust’s NAV as of the close of regular trading on the New York Stock Exchange on the date such Conditional Tender Offer expires.
    On September 26, 2023, the Trust commenced a cash tender offer for up to 1,753,886 of its outstanding common shares. The tender offer expired at 5:00 P.M. Eastern Time on October 25, 2023. The number of shares properly tendered was 1,753,886. The purchase price of the properly tendered shares was equal to $5.9756 per share for an aggregate purchase price of $10,480,521. The condition to trigger a tender offer by the Trust in the fourth quarter of 2022 and 2024 was not met.
    In November 2013, the Board of Trustees initially approved a share repurchase program for the Trust. Pursuant to the reauthorization of the share repurchase program by the Board of Trustees in March 2019, the Trust is authorized to repurchase up to 10% of its common shares outstanding as of the last day of the prior calendar year at market prices when shares are trading at a discount to net asset value. The share repurchase program does not obligate the Trust to purchase a specific amount of shares. There were no repurchases of common shares by the Trust pursuant to the share repurchase program for the six months ended December 31, 2024 and for the year ended June 30, 2024.
    29

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Notes to Financial Statements (Unaudited) — continued

    Pursuant to a registration statement filed with the SEC, the Trust is authorized to issue up to an additional 4,551,438 common shares through an equity shelf offering program (the “shelf offering”). Under the shelf offering, the Trust, subject to market conditions, may raise additional capital from time to time and in varying amounts and offering methods at a net price at or above the Trust’s net asset value per common share.
    During the six months ended December 31, 2024 and the year ended June 30, 2024, the Trust sold 671,490 and 1,586,077 common shares, respectively, and received proceeds (net of offering costs) of $4,216,649 and $10,090,739, respectively, through its shelf offering. The net proceeds in excess of the net asset value of the shares sold were $92,143 for the six months ended December 31, 2024 and $245,093 for the year ended June 30, 2024. Offering costs (other than the applicable sales commissions) incurred in connection with the shelf offering were borne directly by EVM. Eaton Vance Distributors, Inc. (EVD), an affiliate of EVM, is the distributor of the Trust’s shares and is entitled to receive a sales commission from the Trust of 1.00% of the gross sales price per share, a portion of which is re-allowed to sales agents. The Trust was informed that the sales commissions retained by EVD during the six months ended December 31, 2024 and the year ended June 30, 2024 were $8,519 and $20,386, respectively.
    7  Financial Instruments
    The Trust may trade in financial instruments with off-balance sheet risk in the normal course of its investing activities. These financial instruments may include forward foreign currency exchange contracts and may involve, to a varying degree, elements of risk in excess of the amounts recognized for financial statement purposes. The notional or contractual amounts of these instruments represent the investment the Trust has in particular classes of financial instruments and do not necessarily represent the amounts potentially subject to risk. The measurement of the risks associated with these instruments is meaningful only when all related and offsetting transactions are considered. A summary of obligations under these financial instruments at December 31, 2024 is included in the Portfolio of Investments. At December 31, 2024, the Trust had sufficient cash and/or securities to cover commitments under these contracts.
    The Trust is subject to foreign exchange risk in the normal course of pursuing its investment objective. Because the Trust holds foreign currency denominated investments, the value of these investments and related receivables and payables may change due to future changes in foreign currency exchange rates. To hedge against this risk, the Trust enters into forward foreign currency exchange contracts.
    The Trust enters into forward foreign currency exchange contracts that may contain provisions whereby the counterparty may terminate the contract under certain conditions, including but not limited to a decline in the Trust’s net assets below a certain level over a certain period of time, which would trigger a payment by the Trust for those derivatives in a liability position. At December 31, 2024, the fair value of derivatives with credit-related contingent features in a net liability position was $1,144. At December 31, 2024, there were no assets pledged as collateral by the Trust for such liability.
    The over-the-counter (OTC) derivatives in which the Trust invests are subject to the risk that the counterparty to the contract fails to perform its obligations under the contract. To mitigate this risk, the Trust has entered into an International Swaps and Derivatives Association, Inc. Master Agreement (“ISDA Master Agreement”) or similar agreement with substantially all its derivative counterparties. An ISDA Master Agreement is a bilateral agreement between the Trust and a counterparty that governs certain OTC derivatives and typically contains, among other things, set-off provisions in the event of a default and/or termination event as defined under the relevant ISDA Master Agreement. Under an ISDA Master Agreement, the Trust may, under certain circumstances, offset with the counterparty certain derivative financial instruments’ payables and/or receivables with collateral held and/or posted and create one single net payment. The provisions of the ISDA Master Agreement typically permit a single net payment in the event of default including the bankruptcy or insolvency of the counterparty. However, bankruptcy or insolvency laws of a particular jurisdiction may impose restrictions on or prohibitions against the right of offset in bankruptcy or insolvency. Certain ISDA Master Agreements allow counterparties to OTC derivatives to terminate derivative contracts prior to maturity in the event the Trust’s net assets decline by a stated percentage or the Trust fails to meet the terms of its ISDA Master Agreements, which would cause the counterparty to accelerate payment by the Trust of any net liability owed to it.
    The collateral requirements for derivatives traded under an ISDA Master Agreement are governed by a Credit Support Annex to the ISDA Master Agreement. Collateral requirements are determined at the close of business each day and are typically based on changes in market values for each transaction under an ISDA Master Agreement and netted into one amount for such agreement. Generally, the amount of collateral due from or to a counterparty is subject to a minimum transfer threshold amount before a transfer is required, which may vary by counterparty. Collateral pledged for the benefit of the Trust and/or counterparty is held in segregated accounts by the Trust’s custodian and cannot be sold, re-pledged, assigned or otherwise used while pledged. The portion of such collateral representing cash, if any, is reflected as deposits for derivatives collateral and, in the case of cash pledged by a counterparty for the benefit of the Trust, a corresponding liability on the Statement of Assets and Liabilities. Securities pledged by the Trust as collateral, if any, are identified as such in the Portfolio of Investments.
    30

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    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Notes to Financial Statements (Unaudited) — continued

    The fair value of open derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) and whose primary underlying risk exposure is foreign exchange risk at December 31, 2024 was as follows:
      Fair Value
    Derivative Asset Derivative(1) Liability Derivative(2)
    Forward foreign currency exchange contracts $149,538 $(1,144)
    (1) Statement of Assets and Liabilities location: Receivable for open forward foreign currency exchange contracts.
    (2) Statement of Assets and Liabilities location: Payable for open forward foreign currency exchange contracts.
    The Trust's derivative assets and liabilities at fair value by type, which are reported gross in the Statement of Assets and Liabilities, are presented in the table above. The following tables present the Trust's derivative assets and liabilities by counterparty, net of amounts available for offset under a master netting agreement and net of the related collateral received by the Trust for such assets and pledged by the Trust for such liabilities as of December 31, 2024.
    Counterparty Derivative
    Assets Subject to
    Master Netting
    Agreement
    Derivatives
    Available
    for Offset
    Non-cash
    Collateral
    Received(a)
    Cash
    Collateral
    Received(a)
    Net Amount
    of Derivative
    Assets(b)
    Australia and New Zealand Banking Group Limited $20,912 $ — $ — $ — $20,912
    Goldman Sachs International 6,033  —  — (6,033)  —
    HSBC Bank USA, N.A. 23,038  —  —  — 23,038
    Standard Chartered Bank 89,359 (1,144)  —  — 88,215
    State Street Bank and Trust Company 10,196  —  —  — 10,196
      $149,538 $(1,144) $— $(6,033) $142,361
        
    Counterparty Derivative
    Liabilities Subject to
    Master Netting
    Agreement
    Derivatives
    Available
    for Offset
    Non-cash
    Collateral
    Pledged(a)
    Cash
    Collateral
    Pledged(a)
    Net Amount
    of Derivative
    Liabilities(c)
    Standard Chartered Bank $(1,144) $1,144 $ — $ — $ —
    (a) In some instances, the total collateral received and/or pledged may be more than the amount shown due to overcollateralization.
    (b) Net amount represents the net amount due from the counterparty in the event of default.
    (c) Net amount represents the net amount payable to the counterparty in the event of default.
    The effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) on the Statement of Operations and whose primary underlying risk exposure is foreign exchange risk for the six months ended December 31, 2024 was as follows:
    Derivative Realized Gain (Loss)
    on Derivatives Recognized
    in Income(1)
    Change in Unrealized
    Appreciation (Depreciation) on
    Derivatives Recognized in Income(2)
    Forward foreign currency exchange contracts $310,708 $47,265
    (1) Statement of Operations location: Net realized gain (loss): Forward foreign currency exchange contracts.
    (2) Statement of Operations location: Change in unrealized appreciation (depreciation): Forward foreign currency exchange contracts.
    31

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    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Notes to Financial Statements (Unaudited) — continued

    The average notional amount of forward foreign currency exchange contracts (based on the absolute value of notional amounts of currency purchased and currency sold) outstanding during the six months ended December 31, 2024, which is indicative of the volume of this derivative type, was approximately $14,029,000.
    8  Revolving Credit and Security Agreement
    The Trust has entered into a Credit Agreement, as amended, (the Agreement) with a bank to borrow up to a limit of $35 million pursuant to a revolving line of credit. Borrowings under the Agreement are secured by the assets of the Trust. Interest is generally charged at a rate above the Secured Overnight Financing Rate (SOFR) and is payable monthly. Under the terms of the Agreement, in effect through May 1, 2025, the Trust pays a facility fee of 0.15% on the borrowing limit. In connection with the renewal of the Agreement, the Trust also paid upfront fees of $17,500, which are being amortized to interest expense through May 1, 2025. The unamortized balance at December 31, 2024 is approximately $6,000 and is included in prepaid upfront fees on notes payable on the Statement of Assets and Liabilities. The Trust is required to maintain certain net asset levels during the term of the Agreement. At December 31, 2024, the Trust had borrowings outstanding under the Agreement of $21,000,000 at an annual interest rate of 5.33%. Based on the short-term nature of the borrowings under the Agreement and the variable interest rate, the carrying amount of the borrowings at December 31, 2024 approximated its fair value. If measured at fair value, borrowings under the Agreement would have been considered as Level 2 in the fair value hierarchy (see Note 10) at December 31, 2024. For the six months ended December 31, 2024, the average borrowings under the Agreement and the average annual interest rate (excluding fees) were $18,103,261 and 5.86%, respectively.
    9  Affiliated Investments
    At December 31, 2024, the value of the Trust's investment in funds that may be deemed to be affiliated was $3,313,614, which represents 3.0% of the Trust's net assets applicable to common shares. Transactions in such investments by the Trust for the six months ended December 31, 2024 were as follows:
    Name Value,
    beginning
    of period
    Purchases Sales
    proceeds
    Net realized
    gain (loss)
    Change in
    unrealized
    appreciation
    (depreciation)
    Value, end
    of period
    Dividend
    income
    Shares,
    end of period
    Short-Term Investments 
    Liquidity Fund $4,538,748 $558,737,069 $(559,962,203) $ — $ — $3,313,614 $147,852 3,313,614
    10  Fair Value Measurements
    Under generally accepted accounting principles for fair value measurements, a three-tier hierarchy to prioritize the assumptions, referred to as inputs, is used in valuation techniques to measure fair value. The three-tier hierarchy of inputs is summarized in the three broad levels listed below.
    • Level 1 – quoted prices in active markets for identical investments
    • Level 2 – other significant observable inputs (including quoted prices for similar investments, interest rates, prepayment speeds, credit risk, etc.)
    • Level 3 – significant unobservable inputs (including a fund's own assumptions in determining the fair value of investments)
    In cases where the inputs used to measure fair value fall in different levels of the fair value hierarchy, the level disclosed is determined based on the lowest level input that is significant to the fair value measurement in its entirety. The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities.
    At December 31, 2024, the hierarchy of inputs used in valuing the Trust’s investments and open derivative instruments, which are carried at fair value, were as follows:
    Asset Description  Level 1 Level 2 Level 3* Total
    Asset-Backed Securities $       — $  8,325,696 $      — $  8,325,696
    Common Stocks    30,094   1,947,167        0   1,977,261
    Corporate Bonds        —   5,597,191       —   5,597,191
    Preferred Stocks        —      69,878       —      69,878
    Senior Floating-Rate Loans (Less Unfunded Loan Commitments)        — 147,917,138  541,570 148,458,708
    32

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    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Notes to Financial Statements (Unaudited) — continued

    Asset Description (continued) Level 1 Level 2 Level 3* Total
    Warrants $       — $         — $       0 $          0
    Miscellaneous        —          —        0           0
    Short-Term Investments 3,313,614          —       —   3,313,614
    Total Investments $3,343,708 $163,857,070 $ 541,570 $167,742,348
    Forward Foreign Currency Exchange Contracts $       — $    149,538 $      — $    149,538
    Total $3,343,708 $164,006,608 $ 541,570 $167,891,886
    Liability Description         
    Forward Foreign Currency Exchange Contracts $       — $     (1,144) $      — $     (1,144)
    Total $       — $     (1,144) $      — $     (1,144)
    * None of the unobservable inputs for Level 3 assets, individually or collectively, had a material impact on the Trust.
    Level 3 investments at the beginning and/or end of the period in relation to net assets were not significant and accordingly, a reconciliation of Level 3 assets for the six months ended December 31, 2024 is not presented.
    11  Risks and Uncertainties
    Risks Associated with Foreign Investments
    Foreign investments can be adversely affected by political, economic and market developments abroad, including the imposition of economic and other sanctions by the United States or another country, and by acts of terrorism and war. There may be less publicly available information about foreign issuers because they may not be subject to reporting practices, requirements or regulations comparable to those to which United States companies are subject. Foreign markets may be smaller, less liquid and more volatile than the major markets in the United States. Trading in foreign markets typically involves higher expense than trading in the United States. The Trust may have difficulties enforcing its legal or contractual rights in a foreign country. Securities that trade or are denominated in currencies other than the U.S. dollar may be adversely affected by fluctuations in currency exchange rates.
    Credit Risk
    The Trust invests primarily in below investment grade floating-rate loans, which are considered speculative because of the credit risk of their issuers. Changes in economic conditions or other circumstances are more likely to reduce the capacity of issuers of these securities to make principal and interest payments. Such companies are more likely to default on their payments of interest and principal owed than issuers of investment grade bonds. An economic downturn generally leads to a higher non-payment rate, and a loan or other debt obligation may lose significant value before a default occurs. Lower rated investments also may be subject to greater price volatility than higher rated investments. Moreover, the specific collateral used to secure a loan may decline in value or become illiquid, which would adversely affect the loan’s value.
    12  Additional Information
    On August 27, 2020, Saba Capital Master Fund, Ltd., a hedge fund (“Saba”), filed claims against the Trust in a lawsuit in Suffolk County Superior Court in Massachusetts asserting breach of contract and fiduciary duty by the Trust and certain of its affiliates, the Trust's adviser, and the Board, following the implementation by the Trust of a by-law amendment that requires trustee nominees in contested elections to obtain affirmative votes of a majority of eligible shares in order to be elected. With respect to the Trust, Saba sought rescission of this by-law provision and certain related relief. On March 31, 2021, the court allowed in part and denied in part a motion to dismiss Saba's claims. On January 23, 2023, in ruling on the parties’ cross-motions for partial summary judgment, the court dismissed Saba’s claims for breach of fiduciary duty against the Board. Following a bench trial that took place September 9-17, 2024, the court ruled in the Trust’s favor on October 21, 2024 on Saba’s remaining claims, finding that the majority voting standard by-law did not violate the 1940 Act or breach the Trust’s declaration of trust as Saba alleged. The trial court proceedings are now complete, as Saba has indicated it will not seek appeal of the court’s decision.
    33

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    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Notes to Financial Statements (Unaudited) — continued

    13  Commitments and Contingencies
    In connection with the Serta Chapter 11 bankruptcy proceeding, on December 31, 2024, the U.S. Fifth Circuit Court of Appeals reversed a bankruptcy court’s ruling that held permissible an “uptier” agreement (the “2020 Agreement”) entered into by Serta with certain participating lenders, including the Trust. The 2020 Agreement had the effect of subordinating the existing debt of certain non-participating lenders to that of the participating lenders. The non-participating lenders brought claims for breach of contract, arguing that the participating lenders had breached an earlier agreement by entering into the 2020 Agreement. The appellate court found that the bankruptcy court had erred in determining that the 2020 Agreement was permitted by the terms of the earlier agreement and remanded the breach of contract claims for further consideration by the bankruptcy court. The appellate court further held that indemnification of the participating lenders in the 2020 Agreement was impermissible under the U.S. Bankruptcy Code.
    A request by the Trust and the other participating lenders for a rehearing of this matter before the Fifth Circuit en banc was denied. The matter will be remanded to the bankruptcy court to determine whether the participating lenders are liable for the breach of contract claims. At this time, the Trust cannot reliably predict the outcome of these proceedings or the effect, if any, on the Trust’s net asset value.
    34

    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Annual Meeting of Shareholders (Unaudited)

    The Trust held its Annual Meeting of Shareholders on October 9, 2024. The following actions were taken by the shareholders.
    Proposal 1: The election of Mark R. Fetting, Keith Quinton and Scott E. Wennerholm, to be elected as Class II Trustees of the Trust for a three-year term expiring in 2027.
    The following votes were cast by the Trust’s common and APS shareholders, voting together as a single class:
          Number of Shares
    Nominees for Trustee     For Withheld
    Mark R. Fetting     12,033,140 532,263
    Keith Quinton     12,030,476 534,927
    Scott E. Wennerholm     12,027,953 537,450
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    Table of Contents
    Eaton Vance
    Senior Income Trust
    December 31, 2024
    Officers and Trustees

    Officers
    Kenneth A. Topping
    President
    Nicholas S. Di Lorenzo
    Secretary
    Deidre E. Walsh
    Vice President and Chief Legal Officer
    Laura T. Donovan
    Chief Compliance Officer
    James F. Kirchner
    Treasurer
     
    Trustees  
    George J. Gorman
    Chairperson
     
    Alan C. Bowser  
    Mark R. Fetting  
    Cynthia E. Frost  
    Valerie A. Mosley  
    Keith Quinton  
    Marcus L. Smith  
    Nancy Wiser Stefani  
    Susan J. Sutherland  
    Scott E. Wennerholm  
     
    36

    Table of Contents
    Eaton Vance Funds
    U.S. Customer Privacy Notice March 2024

    FACTS WHAT DOES EATON VANCE DO WITH YOUR PERSONAL INFORMATION?
    Why?  Financial companies choose how they share your personal information. Federal law gives consumers the right to limit some but not all sharing. Federal law also requires us to tell you how we collect, share, and protect your personal information. Please read this notice carefully to understand what we do. 
    What?  The types of personal information we collect and share depend on the product or service you have with us. This information can include:
    ■ Social Security number and income
    ■ investment experience and risk tolerance
    ■ checking account information and wire transfer instructions 
    How?  All financial companies need to share customers’ personal information to run their everyday business. In the section below, we list the reasons financial companies can share their customers’ personal information; the reasons Eaton Vance chooses to share; and whether you can limit this sharing. 
    Reasons we can share your personal information Does Eaton Vance
    share?
    Can you limit
    this sharing?
    For our everyday business purposes — such as to process your transactions, maintain your account(s), respond to court orders and legal investigations, or report to credit bureaus Yes No
    For our marketing purposes — to offer our products and services to you Yes No
    For joint marketing with other financial companies No We don’t share
    For our affiliates’ everyday business purposes — information about your transactions and experiences Yes No*
    For our affiliates’ everyday business purposes — information about your creditworthiness Yes Yes*
    For our affiliates to market to you Yes Yes*
    For nonaffiliates to market to you No We don’t share
    To limit our
    sharing 
    Call toll-free 1-800-262-1122 or email: [email protected]
    Please note:
    If you are a new customer, we can begin sharing your information 30 days from the date we sent this notice. When you are no longer our customer, we continue to share your information as described in this notice. However, you can contact us at any time to limit our sharing. 
    Questions?   Call toll-free 1-800-262-1122 or email: [email protected] 
        
    37

    Table of Contents
    Eaton Vance Funds
    U.S. Customer Privacy Notice — continued March 2024

    Page 2
    Who we are
    Who is providing this notice? Eaton Vance Management and our investment management affiliates (“Eaton Vance”) (see Affiliates definition below.)
    What we do
    How does Eaton Vance
    protect my personal
    information?
    To protect your personal information from unauthorized access and use, we use security measures that comply with federal law. These measures include computer safeguards and secured files and buildings. We have policies governing the proper handling of customer information by personnel and requiring third parties that provide support to adhere to appropriate security standards with respect to such information.
    How does Eaton Vance
    collect my personal
    information?
    We collect your personal information, for example, when you
    ■ open an account or make deposits or withdrawals from your account
    ■ buy securities from us or make a wire transfer
    ■ give us your contact information
    We also collect your personal information from others, such as credit bureaus, affiliates, or other companies.
    Why can’t I limit all sharing? Federal law gives you the right to limit only
    ■ sharing for affiliates’ everyday business purposes — information about your creditworthiness
    ■ affiliates from using your information to market to you
    ■ sharing for nonaffiliates to market to you
    State laws and individual companies may give you additional rights to limit sharing. (See below for more on your rights under state law.)
    What happens when I limit
    sharing for an account I hold
    jointly with someone else?
    Your choices will apply to everyone on your account.
    Definitions
    Affiliates Companies related by common ownership or control. They can be financial and nonfinancial companies.
    ■ Our affiliates include registered investment advisers such as Eaton Vance Management, Eaton Vance Advisers International Ltd., Boston Management and Research, Calvert Research and Management, Parametric Portfolio Associates LLC, Atlanta Capital Management Company LLC, Morgan Stanley Investment Management Inc., Morgan Stanley Investment Management Co.; registered broker-dealers such as Morgan Stanley Distributors Inc. and Eaton Vance Distributors, Inc. (together, the “Investment Management Affiliates”); and companies with a Morgan Stanley name and financial companies such as Morgan Stanley Smith Barney LLC and Morgan Stanley & Co. (the “Morgan Stanley Affiliates”).
    Nonaffiliates Companies not related by common ownership or control. They can be financial and nonfinancial companies.
    ■ Eaton Vance does not share with nonaffiliates so they can market to you.
    Joint marketing A formal agreement between nonaffiliated financial companies that together market financial products or services to you.
    ■ Eaton Vance does not jointly market.
    Other important information
    38

    Table of Contents
    Eaton Vance Funds
    U.S. Customer Privacy Notice — continued March 2024

    Page 3
    *PLEASE NOTE: Eaton Vance does not share your creditworthiness information or your transactions and experiences information with the Morgan Stanley Affiliates, nor does Eaton Vance enable the Morgan Stanley Affiliates to market to you. Your opt outs will prevent Eaton Vance from sharing your creditworthiness information with the Investment Management Affiliates and will prevent the Investment Management Affiliates from marketing their products to you.
    Vermont: Except as permitted by law, we will not share personal information we collect about Vermont residents with Nonaffiliates unless you provide us with your written consent to share such information.
    California: Except as permitted by law, we will not share personal information we collect about California residents with Nonaffiliates and we will limit sharing such personal information with our Affiliates to comply with California privacy laws that apply to us.
    39

    Table of Contents
    Eaton Vance Funds
    IMPORTANT NOTICES

    Delivery of Shareholder Documents. The Securities and Exchange Commission (SEC) permits funds to deliver only one copy of shareholder documents, including prospectuses, proxy statements and shareholder reports, to fund investors with multiple accounts at the same residential or post office box address. This practice is often called “householding” and it helps eliminate duplicate mailings to shareholders. Equiniti Trust Company, LLC (“EQ”), the closed-end funds transfer agent, or your financial intermediary, may household the mailing of your documents indefinitely unless you instruct EQ, or your financial intermediary, otherwise. If you would prefer that your Eaton Vance documents not be householded, please contact EQ or your financial intermediary. Your instructions that householding not apply to delivery of your Eaton Vance documents will typically be effective within 30 days of receipt by EQ or your financial intermediary.
    Portfolio Holdings. Each Eaton Vance Fund and its underlying Portfolio(s) (if applicable) files a schedule of portfolio holdings on Part F to Form N-PORT with the SEC. Certain information filed on Form N-PORT may be viewed on the Eaton Vance website at www.eatonvance.com, by calling Eaton Vance at 1-800-262-1122 or in the EDGAR database on the SEC’s website at www.sec.gov.
    Proxy Voting. From time to time, funds are required to vote proxies related to the securities held by the funds. The Eaton Vance Funds or their underlying Portfolios (if applicable) vote proxies according to a set of policies and procedures approved by the Funds’ and Portfolios’ Boards. You may obtain a description of these policies and procedures and information on how the Funds or Portfolios voted proxies relating to portfolio securities during the most recent 12-month period ended June 30, without charge, upon request, by calling 1-800-262-1122 and by accessing the SEC’s website at www.sec.gov. You may also access proxy voting information for the Eaton Vance Funds or their underlying Portfolios at www.eatonvance.com/
    proxyvoting.
    Share Repurchase Program. The Fund’s Board of Trustees has approved a share repurchase program authorizing the Fund to repurchase up to 10% of its common shares outstanding as of the last day of the prior calendar year in open-market transactions at a discount to net asset value. The repurchase program does not obligate the Fund to purchase a specific amount of shares. The Fund’s repurchase activity, including the number of shares purchased, average price and average discount to net asset value, is disclosed in the Fund’s annual and semi-annual reports to shareholders.
    Additional Notice to Shareholders. If applicable, a Fund may also redeem or purchase its outstanding preferred shares in order to maintain compliance with regulatory requirements, borrowing or rating agency requirements or for other purposes as it deems appropriate or necessary.
    Closed-End Fund Information. Eaton Vance closed-end funds make fund performance data and certain information about portfolio characteristics available on the Eaton Vance website shortly after the end of each month. Other information about the funds is available on the website. The funds’ net asset value per share is readily accessible on the Eaton Vance website. Portfolio holdings for the most recent month-end are also posted to the website approximately 30 days following the end of the month. This information is available at www.eatonvance.com on the fund information pages under “Closed-End Funds & Term Trusts.”
    40

    Table of Contents
    Investment Adviser and Administrator
    Eaton Vance Management
    One Post Office Square
    Boston, MA 02109
    Custodian
    State Street Bank and Trust Company
    One Congress Street, Suite 1
    Boston, MA 02114-2016
    Transfer Agent
    Equiniti Trust Company, LLC (“EQ”)
    P.O. Box 500
    Newark, NJ 07101
    Fund Offices
    One Post Office Square
    Boston, MA 02109

    Table of Contents
    7700    12.31.24


    (a)

    (b) Not applicable.

    Item 2. Code of Ethics

    Not required in this filing.

    Item 3. Audit Committee Financial Expert

    Not required in this filing.

    Item 4. Principal Accountant Fees and Services

    Not required in this filing.


    Item 5. Audit Committee of Listed Registrants

    Not required in this filing.

    Item 6. Schedule of Investments

     

    (a)

    Please see schedule of investments contained in the Report to Stockholders included under Item 1 of this Form N-CSR.

     

    (b)

    Not applicable.

    Item 7. Financial Statements and Financial Highlights for Open-End Management Investment Companies

    Not applicable.

    Item 8. Changes in and Disagreements with Accountants for Open-End Management Investment Companies

    Not applicable.

    Item 9. Proxy Disclosures for Open-End Management Investment Companies

    Not applicable.

    Item 10. Remuneration Paid to Directors, Officers, and Others of Open-End Management Investment Companies

    Not applicable.

    Item 11. Statement Regarding Basis for Approval of Investment Advisory Contract

    Not applicable.

    Item 12. Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies

    Not required in this filing.

    Item 13. Portfolio Managers of Closed-End Management Investment Companies

    Not required in this filing.

    Item 14. Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers

    No such purchases this period.

    Item 15. Submission of Matters to a Vote of Security Holders

    There have been no material changes to the procedures by which shareholders may recommend nominee to the Trust’s Board of Trustees since the Trust last provided disclosure in response to this item.


    Item 16. Controls and Procedures

     

    (a)

    It is the conclusion of the registrant’s principal executive officer and principal financial officer that the effectiveness of the registrant’s current disclosure controls and procedures (such disclosure controls and procedures having been evaluated within 90 days of the date of this filing) provide reasonable assurance that the information required to be disclosed by the registrant has been recorded, processed, summarized and reported within the time period specified in the Commission’s rules and forms and that the information required to be disclosed by the registrant has been accumulated and communicated to the registrant’s principal executive officer and principal financial officer in order to allow timely decisions regarding required disclosure.

     

    (b)

    There have been no changes in the registrant’s internal control over financial reporting during the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting.

    Item 17. Disclosure of Securities Lending Activities for Closed-End Management Investment Companies

    No activity to report for the registrant’s most recent fiscal year end.

    Item 18. Recovery of Erroneously Awarded Compensation

    Not applicable.

    Item 19. Exhibits

     

    (a)(1)   Registrant’s Code of Ethics – Not applicable (please see Item 2).
    (a)(2)(i)   Principal Financial Officer’s Section 302 certification.
    (a)(2)(ii)   Principal Executive Officer’s Section 302 certification.
    (b)   Combined Section 906 certification.

     


    Signatures

    Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

     

    Eaton Vance Senior Income Trust
    By:  

    /s/ Kenneth A. Topping

      Kenneth A. Topping
      Principal Executive Officer
    Date:   February 26, 2025

    Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

     

    By:  

    /s/ James F. Kirchner

      James F. Kirchner
      Principal Financial Officer
    Date:   February 26, 2025
    By:  

    /s/ Kenneth A. Topping

      Kenneth A. Topping
      Principal Executive Officer
    Date:   February 26, 2025

     

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