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    SEC Form SCHEDULE 13G filed by Metsera Inc.

    6/3/25 4:30:15 PM ET
    $MTSR
    Biotechnology: Pharmaceutical Preparations
    Health Care
    Get the next $MTSR alert in real time by email



    SECURITIES AND EXCHANGE COMMISSION
    Washington, D.C. 20549


    SCHEDULE 13G


    UNDER THE SECURITIES EXCHANGE ACT OF 1934
    Metsera, Inc.

    (Name of Issuer)


    Common Stock

    (Title of Class of Securities)


    59267L107

    (CUSIP Number)


    03/31/2025

    (Date of Event Which Requires Filing of this Statement)


    Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
    Checkbox not checked   Rule 13d-1(b)
    Checkbox not checked   Rule 13d-1(c)
    Checkbox checked   Rule 13d-1(d)






    SCHEDULE 13G

    CUSIP No.
    59267L107


    1Names of Reporting Persons

    Validae Health, L.P.
    2Check the appropriate box if a member of a Group (see instructions)

    Checkbox not checked  (a)
    Checkbox not checked  (b)
    3Sec Use Only
    4Citizenship or Place of Organization

    DELAWARE
    Number of Shares Beneficially Owned by Each Reporting Person With:
    5Sole Voting Power

    0.00
    6Shared Voting Power

    12,767,462.00
    7Sole Dispositive Power

    0.00
    8Shared Dispositive Power

    12,767,462.00
    9Aggregate Amount Beneficially Owned by Each Reporting Person

    12,767,462.00
    10Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

    Checkbox not checked
    11Percent of class represented by amount in row (9)

    12.2 %
    12Type of Reporting Person (See Instructions)

    PN


    SCHEDULE 13G

    CUSIP No.
    59267L107


    1Names of Reporting Persons

    Population Health Partners GP, LLC
    2Check the appropriate box if a member of a Group (see instructions)

    Checkbox not checked  (a)
    Checkbox not checked  (b)
    3Sec Use Only
    4Citizenship or Place of Organization

    DELAWARE
    Number of Shares Beneficially Owned by Each Reporting Person With:
    5Sole Voting Power

    0.00
    6Shared Voting Power

    12,767,462.00
    7Sole Dispositive Power

    0.00
    8Shared Dispositive Power

    12,767,462.00
    9Aggregate Amount Beneficially Owned by Each Reporting Person

    12,767,462.00
    10Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

    Checkbox not checked
    11Percent of class represented by amount in row (9)

    12.2 %
    12Type of Reporting Person (See Instructions)

    OO

    Comment for Type of Reporting Person:  Limited Liability Company


    SCHEDULE 13G

    CUSIP No.
    59267L107


    1Names of Reporting Persons

    Christopher Whitten Bernard
    2Check the appropriate box if a member of a Group (see instructions)

    Checkbox not checked  (a)
    Checkbox not checked  (b)
    3Sec Use Only
    4Citizenship or Place of Organization

    UNITED STATES
    Number of Shares Beneficially Owned by Each Reporting Person With:
    5Sole Voting Power

    369,182.00
    6Shared Voting Power

    12,767,462.00
    7Sole Dispositive Power

    369,182.00
    8Shared Dispositive Power

    12,767,462.00
    9Aggregate Amount Beneficially Owned by Each Reporting Person

    13,136,644.00
    10Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

    Checkbox not checked
    11Percent of class represented by amount in row (9)

    12.5 %
    12Type of Reporting Person (See Instructions)

    IN


    SCHEDULE 13G

    CUSIP No.
    59267L107


    1Names of Reporting Persons

    Christopher T. Cox
    2Check the appropriate box if a member of a Group (see instructions)

    Checkbox not checked  (a)
    Checkbox not checked  (b)
    3Sec Use Only
    4Citizenship or Place of Organization

    UNITED STATES
    Number of Shares Beneficially Owned by Each Reporting Person With:
    5Sole Voting Power

    18,914.00
    6Shared Voting Power

    12,767,462.00
    7Sole Dispositive Power

    18,914.00
    8Shared Dispositive Power

    12,767,462.00
    9Aggregate Amount Beneficially Owned by Each Reporting Person

    12,786,376.00
    10Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

    Checkbox not checked
    11Percent of class represented by amount in row (9)

    12.2 %
    12Type of Reporting Person (See Instructions)

    IN


    SCHEDULE 13G

    CUSIP No.
    59267L107


    1Names of Reporting Persons

    Clive A. Meanwell
    2Check the appropriate box if a member of a Group (see instructions)

    Checkbox not checked  (a)
    Checkbox not checked  (b)
    3Sec Use Only
    4Citizenship or Place of Organization

    UNITED KINGDOM
    Number of Shares Beneficially Owned by Each Reporting Person With:
    5Sole Voting Power

    67,438.00
    6Shared Voting Power

    12,767,462.00
    7Sole Dispositive Power

    67,438.00
    8Shared Dispositive Power

    12,767,462.00
    9Aggregate Amount Beneficially Owned by Each Reporting Person

    12,834,900.00
    10Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

    Checkbox not checked
    11Percent of class represented by amount in row (9)

    12.2 %
    12Type of Reporting Person (See Instructions)

    IN


    SCHEDULE 13G

    Item 1. 
    (a)Name of issuer:

    Metsera, Inc.
    (b)Address of issuer's principal executive offices:

    3 World Trade Center, 175 Greenwich Street, New York, NY, 10007
    Item 2. 
    (a)Name of person filing:

    Each of the following is hereinafter individually referred to as a "Reporting Person" and collectively as the "Reporting Persons." This statement is filed on behalf of: Validae Health, L.P. Population Health Partners GP, LLC Christopher Whitten Bernard Christopher T. Cox Clive A. Meanwell
    (b)Address or principal business office or, if none, residence:

    The principal business address of each of the Reporting Persons is c/o Population Health Partners, L.P., 1200 Morris Turnpike, Suite 3005, Short Hills, NJ 07078.
    (c)Citizenship:

    Validae Health, L.P. and Population Health Partners GP, LLC are organized under the laws of the State of Delaware. Clive A. Meanwell is a citizen of the United Kingdom. The remaining Reporting Persons are citizens of the United States.
    (d)Title of class of securities:

    Common Stock
    (e)CUSIP No.:

    59267L107
    Item 3.If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
    (a)Checkbox not checked   Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
    (b)Checkbox not checked   Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
    (c)Checkbox not checked   Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
    (d)Checkbox not checked   Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
    (e)Checkbox not checked   An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
    (f)Checkbox not checked   An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
    (g)Checkbox not checked   A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
    (h)Checkbox not checked   A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
    (i)Checkbox not checked   A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
    (j)Checkbox not checked   A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
           please specify the type of institution:
    (k)Checkbox not checked   Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
     
    Item 4.Ownership
    (a)Amount beneficially owned:

    The information contained on the cover pages to this Schedule 13G is incorporated by reference into this Item 4. The ownership information presented herein represents beneficial ownership of Common Stock as of the date of this filing, based upon 105,055,538 shares of Common Stock outstanding as of May 6, 2025, as disclosed in the Issuer's Quarterly Report on Form 10-Q, filed with the Securities and Exchange Commission on May 12, 2025. Validae Health, L.P. is the record holder 12,767,462 shares of Common Stock. Population Health Partners GP, LLC ("PHP GP LLC"), is the sole general partner of Validae Health, L.P., and may be deemed to beneficially own the shares of Common Stock held by Validae Health, L.P. Christopher Whitten Bernard, Christopher T. Cox and Clive A. Meanwell are members of PHP GP LLC and may be deemed to share the power to direct the disposition and vote of the shares held by Validae Health, L.P. Additionally, Christopher Whitten Bernard is the beneficial owner of 369,182 shares of Common Stock underlying stock options that are vested or will vest within 60 days of the date hereof, Christopher T. Cox is the beneficial owner of 18,914 shares of Common Stock underlying stock options that are vested or will vest within 60 days of the date hereof and Clive A. Meanwell is the beneficial owner of 67,438 shares of Common Stock underlying stock options that are vested or will vest within 60 days of the date hereof.
    (b)Percent of class:

    See cover pages
    (c)Number of shares as to which the person has:
     (i) Sole power to vote or to direct the vote:

    See cover pages

     (ii) Shared power to vote or to direct the vote:

    See cover pages

     (iii) Sole power to dispose or to direct the disposition of:

    See cover pages

     (iv) Shared power to dispose or to direct the disposition of:

    See cover pages

    Item 5.Ownership of 5 Percent or Less of a Class.
     
    Item 6.Ownership of more than 5 Percent on Behalf of Another Person.
     
    Not Applicable
    Item 7.Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
     
    Not Applicable
    Item 8.Identification and Classification of Members of the Group.
     
    Not Applicable
    Item 9.Notice of Dissolution of Group.
     
    Not Applicable

    Item 10.Certifications:
     
    Not Applicable

        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.

     
    Validae Health, L.P.
     
    Signature:/s/ Christopher Cox
    Name/Title:Christopher Cox, President
    Date:06/03/2025
     
    Population Health Partners GP, LLC
     
    Signature:/s/ Christopher Cox
    Name/Title:Christopher Cox, Member
    Date:06/03/2025
     
    Christopher Whitten Bernard
     
    Signature:/s/ Christopher Whitten Bernard
    Name/Title:Christopher Whitten Bernard
    Date:06/03/2025
     
    Christopher T. Cox
     
    Signature:/s/ Christopher T. Cox
    Name/Title:Christopher T. Cox
    Date:06/03/2025
     
    Clive A. Meanwell
     
    Signature:/s/ Clive A. Meanwell
    Name/Title:Clive A. Meanwell
    Date:06/03/2025
    Exhibit Information

    Exhibit 99: Joint Filing Agreement

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