Scholar Rock (SRRK) director files Form 4 for tax-related share sales

Rhea-AI Filing Summary

Scholar Rock Holding Corp director reports tax-related stock sales. A company director filed a Form 4 for two sales of common stock on 12/16/2025. The director sold 726 shares at a weighted average price of $43.8761, with individual trade prices ranging from $43.39 to $44.38. A second sale covered 280 shares at a weighted average price of $44.6344, with prices ranging from $44.39 to $45.23. These transactions were executed under a Rule 10b5-1 trading plan adopted on November 20, 2024 to cover tax obligations upon the vesting and settlement of restricted stock units. Following the transactions, the director beneficially owns 32,908 equity awards, consisting of 14,844 shares of common stock and 18,064 restricted stock units (RSUs), all held directly.

Insider Trade Summary

Net Seller: 1,006 shares ($44,352)

Net Sell 2 txns

Insider Peng Katie

Role Director

Sold 1,006 shs ($44K)

Type	Security	Shares	Price	Value
Sale	Common Stock	726	$43.8761	$32K
Sale	Common Stock	280	$44.6344	$12K

Holdings After Transaction: Common Stock — 33,188 shares (Direct)

Footnotes (1)

1. This sale was effected pursuant to a Rule 10b-5-1 trading plan adopted on November 20, 2024 to cover tax obligations upon the vesting and settlement of restricted stock units. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $43.39 to $44.38, inclusive. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request. Consists of 15,124 shares of common stock and 18,064 RSUs. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $44.39 to $45.23, inclusive. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request. Consists of 14,844 shares of common stock and 18,064 RSUs.

Form 4 Insider Transactions: What Each Field Means →

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^*

Peng Katie

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
12/16/2025

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	12/16/2025		S		726(1)	D	$43.8761(2)	33,188(3)	D
Common Stock	12/16/2025		S		280(1)	D	$44.6344(4)	32,908(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 sale was effected pursuant to a Rule 10b-5-1 trading plan adopted on November 20, 2024 to cover tax obligations upon the vesting and settlement of restricted stock units.

2. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $43.39 to $44.38, 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 15,124 shares of common stock and 18,064 RSUs.

4. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $44.39 to $45.23, 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 14,844 shares of common stock and 18,064 RSUs.

	/s/ Junlin Ho, Attorney-in-Fact for Katie Peng	12/18/2025
	** 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.

FAQ

What insider transaction did Scholar Rock (SRRK) report in this Form 4?

A director of Scholar Rock Holding Corp (SRRK) reported two sales of common stock on 12/16/2025, totaling 1,006 shares sold under a pre-arranged trading plan.

How many Scholar Rock (SRRK) shares were sold and at what prices?

The director sold 726 shares at a weighted average price of $43.8761 and 280 shares at a weighted average price of $44.6344. The first set of trades ranged from $43.39 to $44.38, and the second from $44.39 to $45.23.

Was the Scholar Rock (SRRK) insider sale made under a Rule 10b5-1 trading plan?

Yes. The filing states the sale was effected pursuant to a Rule 10b5-1 trading plan adopted on November 20, 2024 to cover tax obligations upon the vesting and settlement of restricted stock units.

How many Scholar Rock (SRRK) shares and RSUs does the director still beneficially own?

After the reported transactions, the director beneficially owns 32,908 equity awards, consisting of 14,844 shares of common stock and 18,064 restricted stock units (RSUs), held directly.

What is the stated purpose of the insider stock sales at Scholar Rock (SRRK)?

The explanation notes that the sale was made to cover tax obligations arising from the vesting and settlement of restricted stock units, in accordance with the director’s Rule 10b5-1 trading plan.

Who signed the Scholar Rock (SRRK) Form 4 reporting these transactions?

The Form 4 was signed by Junlin Ho as Attorney-in-Fact for Katie Peng on 12/18/2025.