Scholar Rock CSO sells 14,898 shares under 10b5-1

Scholar Rock Holding Corp’s chief scientific officer, Mo Qatanani, reported two stock sales on January 22, 2026 under a pre-arranged Rule 10b5-1 trading plan adopted on March 31, 2025.

Rhea-AI Filing Summary

Scholar Rock Holding Corp’s chief scientific officer, Mo Qatanani, reported two stock sales on January 22, 2026 under a pre-arranged Rule 10b5-1 trading plan adopted on March 31, 2025. He sold 2,119 shares of common stock at a weighted average price of $45.8655 and another 12,779 shares at a weighted average price of $46.8541, with each sale executed through multiple trades within the stated price ranges. After these transactions, his reported beneficial holdings consist of 85,660 restricted stock units (RSUs), and the earlier figure of 98,439 beneficially owned securities reflected 12,779 shares plus these RSUs before the second sale.

Insider Trade Summary

Net Seller: 14,898 shares

Net Sell 2 txns

Insider Qatanani Mo

Role CHIEF SCIENTIFIC OFFICER

Sold 14,898 shs ($696K)

Type	Security	Shares	Price	Value
Sale	Common Stock	2,119	$45.8655	$97K
Sale	Common Stock	12,779	$46.8541	$599K

Holdings After Transaction: Common Stock — 85,660 shares (Direct)

Footnotes (5)

1. F1. This transaction was effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted on March 31, 2025.
2. F2. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $45.43 to $46.42, inclusive. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.
3. F3. Consists of 12,779 shares of common stock and 85,660 RSUs.
4. F4. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $46.43 to $47.31, inclusive. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.
5. F5. Consists of 85,660 RSUs.

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Accepted by SEC EDGAR 01/23/2026 - 04:30 PM Learn about SEC filing dates

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)
01/22/2026

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	01/22/2026		S		2,119(1)	D	$45.8655(2)	98,439(3)	D
Common Stock	01/22/2026		S		12,779(1)	D	$46.8541(4)	85,660(5)	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

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. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $45.43 to $46.42, inclusive. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

3. Consists of 12,779 shares of common stock and 85,660 RSUs.

4. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $46.43 to $47.31, inclusive. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

5. Consists of 85,660 RSUs.

	/s/ Junlin Ho, Attorney-in-Fact for Mo Qatanani	01/23/2026
	** 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.