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    CHIEF SCIENTIFIC OFFICER Qatanani Mo exercised 13,112 shares at a strike of $18.53 and sold $592,611 worth of shares (13,112 units at $45.20) (SEC Form 4)

    1/16/26 6:37:18 PM ET
    $SRRK
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    Get the next $SRRK alert in real time by email
    SEC FORM 4 SEC Form 4
    FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
    Washington, D.C. 20549

    STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

    Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
    or Section 30(h) of the Investment Company Act of 1940
    OMB APPROVAL
    OMB Number: 3235-0287
    Estimated average burden
    hours per response: 0.5
      
    Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
    X
    Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
    1. Name and Address of Reporting Person*
    Qatanani Mo

    (Last) (First) (Middle)
    301 BINNEY STREET

    (Street)
    CAMBRIDGE MA 02142

    (City) (State) (Zip)
    2. Issuer Name and Ticker or Trading Symbol
    Scholar Rock Holding Corp [ SRRK ]
    5. Relationship of Reporting Person(s) to Issuer
    (Check all applicable)
    Director 10% Owner
    X Officer (give title below) Other (specify below)
    CHIEF SCIENTIFIC OFFICER
    3. Date of Earliest Transaction (Month/Day/Year)
    01/14/2026
    4. If Amendment, Date of Original Filed (Month/Day/Year)
    6. Individual or Joint/Group Filing (Check Applicable Line)
    X Form filed by One Reporting Person
    Form filed by More than One Reporting Person
    Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
    1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
    Code V Amount (A) or (D) Price
    Common Stock 01/14/2026 M 1,407(1) A $18.08 110,371(2) D
    Common Stock 01/14/2026 M 321(1) A $7.62 110,692(3) D
    Common Stock 01/14/2026 M 2,813(1) A $10 113,505(4) D
    Common Stock 01/14/2026 M 5,893(1) A $15.75 119,398(5) D
    Common Stock 01/14/2026 M 2,678(1) A $35.15 122,076(6) D
    Common Stock 01/14/2026 S 13,112(1) D $45.1961(7) 108,964(8) D
    Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
    (e.g., puts, calls, warrants, options, convertible securities)
    1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
    Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
    Stock Option (Right to Buy) $18.08 01/14/2026 M(1) 1,407 (9) 02/14/2032 Common Stock 1,407 $0 0 D
    Stock Option (Right to Buy) $7.62 01/14/2026 M(1) 321 (10) 10/10/2032 Common Stock 321 $0 961 D
    Stock Option (Right to Buy) $10 01/14/2026 M(1) 2,813 (11) 02/13/2033 Common Stock 2,813 $0 11,250 D
    Stock Option (Right to Buy) $15.75 01/14/2026 M(1) 5,893 (12) 02/12/2034 Common Stock 5,893 $0 47,143 D
    Stock Option (Right to Buy) $35.15 01/14/2026 M(1) 2,678 (13) 03/10/2035 Common Stock 2,678 $0 32,142 D
    Explanation of Responses:
    1. This transaction was effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted on March 31, 2025.
    2. Consists of 1,407 shares of common stock and 108,964 RSUs.
    3. Consists of 1,728 shares of common stock and 108,964 RSUs.
    4. Consists of 4,541 shares of common stock and 108,964 RSUs.
    5. Consists of 10,434 shares of common stock and 108,964 RSUs.
    6. Consists of 13,112 shares of common stock and 108,964 RSUs.
    7. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $45.00 to $45.45, inclusive. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.
    8. Consists of 108,964 RSUs.
    9. No shares remain unvested under this stock option.
    10. 961 shares remain unvested under this stock option. The first vesting event occurred on January 5, 2023 and the remainder vests in fifteen quarterly installments thereafter; provided the reporting person continues to have a service relationship with the Issuer on such vesting date.
    11. 11,250 shares remain unvested under this stock option. The first vesting event occurred on April 1, 2023 and the remainder vests in fifteen quarterly installments thereafter; provided the reporting person continues to have a service relationship with the Issuer on such vesting date.
    12. 47,143 shares remain unvested under this stock option. The first vesting event occurred on April 1, 2024 and the remainder vests in fifteen quarterly installments thereafter; provided the reporting person continues to have a service relationship with the Issuer on such vesting date.
    13. 32,142 shares remain unvested under this stock option. The first vesting event occurred on April 1, 2025 and the remainder vests in fifteen quarterly installments thereafter; provided the reporting person continues to have a service relationship with the Issuer on such vesting date.
    /s/ Junlin Ho, Attorney-in-Fact for Mo Qatanani 01/16/2026
    ** Signature of Reporting Person Date
    Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
    * If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
    ** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
    Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
    Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
    Get the next $SRRK alert in real time by email

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