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    Amendment: SEC Form SCHEDULE 13D/A filed by Alumis Inc.

    11/17/25 4:56:24 PM ET
    $ALMS
    Biotechnology: Pharmaceutical Preparations
    Health Care
    Get the next $ALMS alert in real time by email



    SECURITIES AND EXCHANGE COMMISSION
    Washington, D.C. 20549


    SCHEDULE 13D

    Under the Securities Exchange Act of 1934

    (Amendment No. 2)


    ALUMIS INC.

    (Name of Issuer)


    Common Stock, par value $0.0001 per share

    (Title of Class of Securities)


    022307102

    (CUSIP Number)


    Abrar Hussain
    Samsara BioCapital GP, LLC, 628 Middlefield Road
    Palo Alto, CA, 94301
    (650) 285-4270

    (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)
    11/13/2025

    (Date of Event Which Requires Filing of This Statement)


    If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. Checkbox not checked

    The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).






    SCHEDULE 13D

    CUSIP No.
    022307102


    1 Name of reporting person

    Samsara BioCapital, L.P.
    2Check the appropriate box if a member of a Group (See Instructions)

    Checkbox not checked  (a)
    Checkbox checked  (b)
    3SEC use only
    4 Source of funds (See Instructions)

    WC
    5 Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

    Checkbox not checked
    6Citizenship or place of organization

    DELAWARE
    Number of Shares Beneficially Owned by Each Reporting Person With:
    7Sole Voting Power

    0.00
    8Shared Voting Power

    4,491,731.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    4,491,731.00
    11Aggregate amount beneficially owned by each reporting person

    4,491,731.00
    12Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

    Checkbox not checked
    13Percent of class represented by amount in Row (11)

    4.6 %
    14Type of Reporting Person (See Instructions)

    PN



    SCHEDULE 13D

    CUSIP No.
    022307102


    1 Name of reporting person

    Samsara BioCapital GP, LLC
    2Check the appropriate box if a member of a Group (See Instructions)

    Checkbox not checked  (a)
    Checkbox checked  (b)
    3SEC use only
    4 Source of funds (See Instructions)

    AF
    5 Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

    Checkbox not checked
    6Citizenship or place of organization

    DELAWARE
    Number of Shares Beneficially Owned by Each Reporting Person With:
    7Sole Voting Power

    0.00
    8Shared Voting Power

    4,491,731.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    4,491,731.00
    11Aggregate amount beneficially owned by each reporting person

    4,491,731.00
    12Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

    Checkbox not checked
    13Percent of class represented by amount in Row (11)

    4.6 %
    14Type of Reporting Person (See Instructions)

    OO



    SCHEDULE 13D

    CUSIP No.
    022307102


    1 Name of reporting person

    Samsara Opportunity Fund, L.P.
    2Check the appropriate box if a member of a Group (See Instructions)

    Checkbox not checked  (a)
    Checkbox checked  (b)
    3SEC use only
    4 Source of funds (See Instructions)

    WC
    5 Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

    Checkbox not checked
    6Citizenship or place of organization

    DELAWARE
    Number of Shares Beneficially Owned by Each Reporting Person With:
    7Sole Voting Power

    0.00
    8Shared Voting Power

    276,179.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    276,179.00
    11Aggregate amount beneficially owned by each reporting person

    276,179.00
    12Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

    Checkbox not checked
    13Percent of class represented by amount in Row (11)

    0.3 %
    14Type of Reporting Person (See Instructions)

    PN



    SCHEDULE 13D

    CUSIP No.
    022307102


    1 Name of reporting person

    Samsara Opportunity Fund GP, LLC
    2Check the appropriate box if a member of a Group (See Instructions)

    Checkbox not checked  (a)
    Checkbox checked  (b)
    3SEC use only
    4 Source of funds (See Instructions)

    AF
    5 Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

    Checkbox not checked
    6Citizenship or place of organization

    DELAWARE
    Number of Shares Beneficially Owned by Each Reporting Person With:
    7Sole Voting Power

    0.00
    8Shared Voting Power

    276,179.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    276,179.00
    11Aggregate amount beneficially owned by each reporting person

    276,179.00
    12Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

    Checkbox not checked
    13Percent of class represented by amount in Row (11)

    0.3 %
    14Type of Reporting Person (See Instructions)

    OO



    SCHEDULE 13D

    CUSIP No.
    022307102


    1 Name of reporting person

    Srinivas Akkaraju
    2Check the appropriate box if a member of a Group (See Instructions)

    Checkbox not checked  (a)
    Checkbox checked  (b)
    3SEC use only
    4 Source of funds (See Instructions)

    AF
    5 Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

    Checkbox not checked
    6Citizenship or place of organization

    UNITED STATES
    Number of Shares Beneficially Owned by Each Reporting Person With:
    7Sole Voting Power

    0.00
    8Shared Voting Power

    4,767,910.00
    9Sole Dispositive Power

    0.00
    10Shared Dispositive Power

    4,767,910.00
    11Aggregate amount beneficially owned by each reporting person

    4,767,910.00
    12Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

    Checkbox not checked
    13Percent of class represented by amount in Row (11)

    4.9 %
    14Type of Reporting Person (See Instructions)

    IN



    SCHEDULE 13D

    Item 1.Security and Issuer
    (a)Title of Class of Securities:

    Common Stock, par value $0.0001 per share
    (b)Name of Issuer:

    ALUMIS INC.
    (c)Address of Issuer's Principal Executive Offices:

    280 East Grand Avenue, South San Francisco, CALIFORNIA , 94080.
    Item 1 Comment:
    This Amendment No. 2 (this "Amendment No. 2" or this "Schedule 13D/A") amends and supplements the statement on Schedule 13D originally filed with the Securities and Exchange Commission (the "SEC") on August 27, 2024 and amended on May 23, 2025 (the "Statement") by Samsara LP, Samsara GP and Dr. Akkaraju. Unless otherwise defined herein, capitalized terms used in this Amendment No. 2 shall have the meanings ascribed to them in the Statement. Unless amended or supplemented below, the information in the Statement remains unchanged.
    Item 2.Identity and Background
    (a)
    This Schedule 13D/A is being filed on behalf of Samsara BioCapital, L.P. ("Samsara LP"), Samsara BioCapital GP, LLC ("Samsara GP"), Samsara Opportunity Fund, L.P. ("Samsara Opportunity Fund") Samsara Opportunity Fund GP, LLC ("Samsara Opportunity GP") and Dr. Srinivas Akkaraju ("Dr. Akkaraju"). Samsara LP, Samsara GP, Samsara Opportunity Fund, Samsara Opportunity GP and Dr. Akkaraju are collectively referred to herein as the "Reporting Persons." The agreement among the Reporting Persons to file this Schedule 13D/A jointly in accordance with Rule 13d-1(k) of the Securities Exchange Act of 1934, as amended, (the "Act") is attached hereto as Exhibit 99.1. Each of the Reporting Persons expressly disclaims the existence of a "group" for purposes of this Schedule 13D/A.
    (b)
    The address of the principal business office of each of the Reporting Persons is 628 Middlefield Road, Palo Alto, CA 94301.
    (c)
    The principal business of the Reporting Persons is venture capital investments. Dr. Akkaraju serves as the Managing Member of each of Samsara GP, which is the general partner of Samsara LP, and Samsara Opportunity GP, which is the general partner of Samsara Opportunity Fund.
    (d)
    During the last five years, none of the Reporting Persons has been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).
    (e)
    During the last five years, none of the Reporting Persons was a party to a civil proceeding of a judicial of administrative body of competent jurisdiction or were subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.
    (f)
    Each of Samsara LP, Samsara GP, Samsara Opportunity Fund and Samsara Opportunity GP was organized in the state of Delaware and Dr. Akkaraju is a citizen of the United States.
    Item 3.Source and Amount of Funds or Other Consideration
     
    Item 3 of the Statement is hereby amended and supplemented as follows: On November 13, 2025, Samsara Opportunity Fund purchased 276,179 shares of voting common stock from Samsara LP in a private sale for $5.25 per share, or an aggregate purchase price of approximately $1,450,000. These shares represented shares held by Samsara LP for the exclusive benefit of limited partners who had redeemed their respective interests in Samsara LP and in which neither Samsara GP nor Dr. Akkaraju had any economic interest. These purchases were for cash and were funded by capital contributions from the general and limited partners of Samsara Opportunity Fund.
    Item 5.Interest in Securities of the Issuer
    (a)
    Rows 11 and 13 of each Reporting Person's cover page to this Schedule 13D/A set forth the aggregate number of shares of voting common stock and percentages of the shares of voting common stock beneficially owned by such Reporting Person and are incorporated by reference. The percentage set forth in each row 13 is based upon 97,208,495 shares of voting common stock outstanding as of November 6, 2025, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on November 13, 2025. The Reporting Persons' beneficial ownership of the Issuer's securities consists of (i) 4,491,731 shares of voting common stock directly held by Samsara LP; and (ii) 276,179 shares of voting common stock directly held by Samsara Opportunity Fund. Samsara GP is the sole general partner of Samsara LP and Dr. Akkaraju is the managing member of Samsara GP. Each of Samsara GP and Dr. Akkaraju possesses power to direct the voting and disposition of the securities held by Samsara LP. Samsara Opportunity GP is the sole general partner of Samsara Opportunity Fund and Dr. Akkaraju is the managing member of Samsara Opportunity GP. Each of Samsara Opportunity GP and Dr. Akkaraju possesses power to direct the voting and disposition of the securities held by Samsara Opportunity Fund.
    (b)
    Rows 7 through 10 of each Reporting Person's cover page to this Schedule 13D/A set forth the number of shares of voting common stock as to which such Reporting Person has the sole or shared power to vote or direct the vote and sole or shared power to dispose or to direct the disposition and are incorporated by reference.
    (c)
    On November 13, 2025, Samsara LP also sold 33,460 shares in an open market transaction at $5.28 per share. These shares were held by Samsara for the exclusive benefit of limited partners who had redeemed their respective interests in Samsara LP and in which neither Samsara GP nor Dr. Akkaraju had any economic interest. Except as set forth in the preceding sentence and elsewhere herein, none of the Reporting Persons has effected any transactions with respect to the securities of the Issuer during the past sixty days.
    (d)
    No other person is known to have the right to receive or the power to direct the receipt of dividends from, or any proceeds from the sale of, the securities beneficially owned by any of the Reporting Persons.
    (e)
    The Reporting Persons ceased to beneficially own greater than 5% of the voting common stock on November 13, 2025.
    Item 7.Material to be Filed as Exhibits.
     
    Exhibit 99.1 Joint Filing Agreement

        SIGNATURE 
     
    After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

     
    Samsara BioCapital, L.P.
     
    Signature:/s/ Srinivas Akkaraju
    Name/Title:By Samsara BioCapital GP, LLC, its General Partner, By Srinivas Akkaraju, Managing Member
    Date:11/17/2025
     
    Samsara BioCapital GP, LLC
     
    Signature:/s/ Srinivas Akkaraju
    Name/Title:By Srinivas Akkaraju, Managing Member
    Date:11/17/2025
     
    Samsara Opportunity Fund, L.P.
     
    Signature:/s/ Srinivas Akkaraju
    Name/Title:By Samsara Opportunity Fund GP, LLC, its General Partner, By Srinivas Akkaraju, Managing Member
    Date:11/17/2025
     
    Samsara Opportunity Fund GP, LLC
     
    Signature:/s/ Srinivas Akkaraju
    Name/Title:By Srinivas Akkaraju, Managing Member
    Date:11/17/2025
     
    Srinivas Akkaraju
     
    Signature:/s/ Srinivas Akkaraju
    Name/Title:Srinivas Akkaraju
    Date:11/17/2025
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