Scholar Rock (SRRK) Insider Sale: Katie Peng Discloses 10b5-1 Sales on 09/16/2025

Rhea-AI Filing Summary

Katie Peng, a director of Scholar Rock Holding Corp (SRRK), reported sales of common stock on 09/16/2025 under a Rule 10b5-1 plan adopted 11/20/2024 to cover tax obligations from RSU vesting. The filing shows two sale events: 930 shares sold at a weighted average price of $32.4761 and 76 shares sold at a weighted average price of $33.1963, executed in multiple transactions at prices ranging $31.85–$33.73. After these sales Ms. Peng beneficially owns 33,990 shares following the first reported sale and 33,914 shares following the second, held directly and including unvested RSUs. The Form 4 was signed by an attorney-in-fact on 09/17/2025.

Positive

• Use of a Rule 10b5-1 plan adopted 11/20/2024 signals pre-planned, non-opportunistic trading
• Full disclosure of weighted average prices and price ranges with an offer to provide per-transaction details to the SEC staff
• Beneficial ownership reported after the transactions, including breakdowns that distinguish common shares and RSUs

Negative

• None.

Insights

Securities Analyst

TL;DR: Insider sold a small number of shares under a pre-established 10b5-1 plan to cover RSU tax obligations; no unusual activity indicated.

The transactions are explicitly described as sales under a Rule 10b5-1 trading plan adopted November 20, 2024 to satisfy tax obligations from RSU vesting and settlement. Reported sale volumes (930 and 76 shares) are small relative to total outstanding shares of a listed issuer and were executed at weighted average prices disclosed in the filing. The filing discloses remaining beneficial ownership counts including both vested shares and RSUs. No derivative transactions or other compensatory arrangements beyond the RSU reference are reported.

Corporate Governance Expert

TL;DR: Director followed a pre-established trading plan and properly disclosed sales; disclosure appears compliant and routine.

The Form 4 identifies the reporting person as a director and specifies use of a 10b5-1 plan adopted on 11/20/2024, which aligns with standard governance practice for avoiding claims of opportunistic insider trading. The filing provides weighted average prices and notes price ranges for multiple executions, with the filer offering to furnish detailed per-transaction amounts to the SEC staff upon request. The form is executed by an attorney-in-fact and includes beneficial ownership totals post-transaction, supporting transparency of the director's holdings.

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).

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)
09/16/2025

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	09/16/2025		S		930(1)	D	$32.4761(2)	33,990(3)	D
Common Stock	09/16/2025		S		76(1)	D	$33.1963(4)	33,914(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 10b5-1 trading plan adopted on November 20, 2024 to cover tax obligations upon the vesting and settlement of restricted stock units ("RSUs").

2. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $31.85 to $32.83, 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 13,690 shares of common stock and 20,300 RSUs.

4. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $32.85 to $33.73, 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 13,614 shares of common stock and 20,300 RSUs.

	/s/ Junlin Ho, Attorney-in-Fact for Katie Peng	09/17/2025
	** 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 did Katie Peng (SRRK) disclose on the Form 4 filed 09/17/2025?

The filing reports sales on 09/16/2025 under a Rule 10b5-1 plan to cover RSU tax obligations, showing weighted average prices of $32.4761 and $33.1963 and post-sale beneficial ownership of 33,990 and 33,914 shares respectively.

Why were the shares sold according to the Form 4 for SRRK?

The filing states the sales were 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 shares were sold by the reporting person in each transaction?

The Form 4 reports 930 shares sold in the first reported sale and 76 shares sold in the second reported sale on 09/16/2025, representing combinations of common stock and RSUs as explained in the filing.

What price ranges are disclosed for the SRRK sales reported on the Form 4?

The filing discloses execution price ranges of $31.85 to $32.83 for the first set of sales and $32.85 to $33.73 for the second set; weighted average prices are provided in the table.

Who signed the Form 4 for Katie Peng?

The Form 4 was signed by Junlin Ho, Attorney-in-Fact for Katie Peng on 09/17/2025.