| David C. Sullivan, Esq. Adam M. Schlichtmann, Esq. Ropes & Gray LLP Prudential Tower, 800 Boylston Street Boston, Massachusetts 02199 | Douglas P. Dick, Esq. Adam T. Teufel, Esq. Dechert LLP 1900 K Street, N.W. Washington, D.C. 20006 | 
| Check box if the only securities being registered on  this Form are being offered pursuant to dividend or  interest reinvestment plans. | Check box if this Form is a registration statement  pursuant to General Instruction B or a post-effective  amendment thereto that will become effective upon  filing with the Commission pursuant to Rule 462(e)  under the Securities Act. | ||
| Check box if any securities being registered on this  Form will be offered on a delayed or continuous basis  in reliance on Rule 415 under the Securities Act of  1933 (“Securities Act”), other than securities offered  in connection with a dividend reinvestment plan. | Check box if this Form is a post-effective amendment  to a registration statement filed pursuant to General  Instruction B to register additional securities or  additional classes of securities pursuant to  Rule 413(b) under the Securities Act. | ||
| Check box if this Form is a registration statement  pursuant to General Instruction A.2 or a post-effective  amendment thereto. | 
| It is proposed that this filing will become effective (check appropriate box): | |
| when declared effective pursuant to Section 8(c), or as follows: | |
| If appropriate, check the following box: | |||
| This post-effective amendment designates a new  effective date for a previously filed post-effective  amendment. | This Form is a post-effective amendment filed  pursuant to Rule 462(c) under the Securities Act, and  the Securities Act registration statement number of  the earlier effective registration statement for the  same offering is: | ||
| This Form is filed to register additional securities for  an offering pursuant to Rule 462(b) under the  Securities Act, and the Securities Act registration  statement number of the earlier effective registration  statement for the same offering is: | This Form is a post-effective amendment filed  pursuant to Rule 462(d) under the Securities Act, and  the Securities Act registration statement number of  the earlier effective registration statement for the  same offering is:  | ||
| Check each box that appropriately characterizes the Registrant: | |||
| Registered Closed-End Fund (closed-end company  that is registered under the Investment Company Act  of 1940 (“Investment Company Act”)). | Well-Known Seasoned Issuer (as defined by Rule 405  under the Securities Act). | ||
| Business Development Company (closed-end  company that intends or has elected to be regulated as  a business development company under the  Investment Company Act). | Emerging Growth Company (as defined by  Rule 12b-2 under the Securities Exchange Act of  1934 (“Exchange Act”). | ||
| Interval Fund (Registered Closed-End Fund or a  Business Development Company that makes periodic  repurchase offers under Rule 23c-3 under the  Investment Company Act). | ☐ | If an Emerging Growth Company, indicate by check  mark if the registrant has elected not to use the  extended transition period for complying with any  new or revised financial accounting standards  provided pursuant to Section 7(a)(2)(B) of Securities  Act. | |
| A.2 Qualified (qualified to register securities pursuant  to General Instruction A.2 of this Form). | New Registrant (registered or regulated under the  Investment Company Act for less than 12 calendar  months preceding this filing). | ||
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| (b) |  | |
| (c) |  | None. | 
| (d) | (1) | Article III (Shares) and Article V (Shareholders’ Voting Powers and Meetings) of the Amended and  Restated Agreement and Declaration of Trust (see (a)(1) above). | 
|  | (2) | Article 10 (Shareholders’ Voting Powers and Meetings) of the Amended and Restated Bylaws of  Registrant (see (b) above). | 
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| (e) |  | |
| (f) |  | None. | 
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| (i) |  | None. | 
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| (m) |  | None. | 
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| (o) |  | None. | 
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| (q) |  | None. | 
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| Securities and Exchange Commission Fees | $32,445 | 
| Financial Industry Regulatory Authority, Inc. Fees | $53,150 | 
| Printing and Engraving Expenses | $15,000 | 
| Legal Fees | $300,000 | 
| New York Stock Exchange Fees | $94,235 | 
| Accounting Expenses | $72,030 | 
| Transfer Agent Fees | $0 | 
| Trustee Fees | $0 | 
| Marketing Expenses | $0 | 
| Miscellaneous Expenses | $0 | 
| Total | $566,860 | 
| Title of Class | Number of Record Holders | 
| Common Shares, par value $0.00001 | 171,049,828 | 
| PIMCO HIGH INCOME FUND | |
| By: | Joshua D. Ratner* | 
| Name: | Joshua D. Ratner | 
| Title: | President | 
| Name | Capacity | Date | 
| Joshua D. Ratner* Joshua D. Ratner | President (Principal Executive Officer) | May 1, 2025 | 
| Bijal Y. Parikh* Bijal Y. Parikh | Treasurer (Principal Financial & Accounting Officer) | May 1, 2025 | 
| Libby D. Cantrill* Libby D. Cantrill | Trustee | May 1, 2025 | 
| Sarah E. Cogan* Sarah E. Cogan | Trustee | May 1, 2025 | 
| Deborah A. DeCotis* Deborah A. DeCotis | Trustee | May 1, 2025 | 
| David Flattum* David Flattum | Trustee | May 1, 2025 | 
| Kathleen McCartney* Kathleen McCartney | Trustee | May 1, 2025 | 
| Alan Rappaport* Alan Rappaport | Trustee | May 1, 2025 | 
| E. Grace Vandercruze* E. Grace Vandercruze | Trustee | May 1, 2025 | 
| *By: | /s/ David C. Sullivan David C. Sullivan as attorney-in-fact |