Scholar Rock CSO sells 8,484 shares in plan trade

Scholar Rock Holding Corp’s chief scientific officer, Mo Qatanani, sold a total of 8,484 shares of common stock in open‑market transactions on February 23, 2026.

Rhea-AI Filing Summary

Scholar Rock Holding Corp’s chief scientific officer, Mo Qatanani, sold a total of 8,484 shares of common stock in open‑market transactions on February 23, 2026. The sales were executed under a pre‑established Rule 10b5‑1 trading plan adopted on March 31, 2025.

The transactions were split into three tranches: 7,427 shares at a weighted average price of $46.9422, 857 shares at $47.8588, and 200 shares at $48.4800, with each tranche covering multiple trades within stated price ranges. Following these sales, Qatanani’s reported holdings consist of 98,445 RSUs.

Insider Trade Summary

Net Seller: 8,484 shares

Net Sell 3 txns

Insider Qatanani Mo

Role CHIEF SCIENTIFIC OFFICER

Sold 8,484 shs ($399K)

Type	Security	Shares	Price	Value
Sale	Common Stock	7,427	$46.9422	$349K
Sale	Common Stock	857	$47.8588	$41K
Sale	Common Stock	200	$48.48	$10K

Holdings After Transaction: Common Stock — 98,445 shares (Direct)

Footnotes (7)

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 $46.52 to $47.48, 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 1,057 shares of common stock and 98,445 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 $47.55 to $48.19, 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 200 shares of common stock and 98,445 RSUs.
6. F6. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $48.30 to $48.66, inclusive. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.
7. F7. Consists of 98,445 RSUs.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many Scholar Rock (SRRK) shares did Mo Qatanani sell?

Mo Qatanani sold a total of 8,484 shares of Scholar Rock common stock. The sales occurred in three separate open‑market transactions on February 23, 2026, under a pre‑arranged Rule 10b5‑1 trading plan.

On what date did the Scholar Rock (SRRK) insider stock sales occur?

The reported insider stock sales occurred on February 23, 2026. Mo Qatanani executed three open‑market transactions in Scholar Rock common stock on that date, all conducted under a previously adopted Rule 10b5‑1 trading plan.

What prices did Mo Qatanani receive for the sold SRRK shares?

The sold shares had weighted average prices of $46.9422, $47.8588, and $48.4800. Each tranche was executed through multiple trades within narrow price ranges disclosed in the filing’s footnotes.

Were the SRRK insider sales made under a Rule 10b5-1 trading plan?

Yes, the sales were made under a Rule 10b5‑1 trading plan. The filing states the plan was adopted on March 31, 2025, and the February 23, 2026 trades were effected pursuant to that pre‑established plan.

How many SRRK equity awards does Mo Qatanani hold after the sales?

After the reported sales, Mo Qatanani’s holdings consist of 98,445 RSUs. Footnotes clarify that the post‑transaction balance reflects only restricted stock units, rather than additional shares of common stock.

What role does the insider involved in the SRRK Form 4 hold?

The reporting person, Mo Qatanani, serves as Scholar Rock’s chief scientific officer. The Form 4 details his open‑market sales of company common stock and the remaining balance of restricted stock units following those transactions.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 02/25/2026 - 05:55 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)
02/23/2026

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	02/23/2026		S		7,427(1)	D	$46.9422(2)	99,502(3)	D
Common Stock	02/23/2026		S		857(1)	D	$47.8588(4)	98,645(5)	D
Common Stock	02/23/2026		S		200(1)	D	$48.48(6)	98,445(7)	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 $46.52 to $47.48, 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 1,057 shares of common stock and 98,445 RSUs.

4. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $47.55 to $48.19, 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 200 shares of common stock and 98,445 RSUs.

6. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $48.30 to $48.66, inclusive. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.

7. Consists of 98,445 RSUs.

	/s/ Junlin Ho, Attorney-in-Fact for Mo Qatanani	02/25/2026
	** 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.