Scholar Rock (NASDAQ: SRRK) director receives new RSU and stock option grants

Rhea-AI Filing Summary

Scholar Rock Holding Corp director Kristina Burow reported new equity awards and updated her holdings. She received 6,839 restricted stock units, each representing one common share upon vesting, bringing her direct holdings to 110,871 common shares plus 6,839 RSUs. She also received an option grant for 4,310 shares of common stock at an exercise price of $45.33 per share, expiring on June 4, 2036, which will vest on the earlier of the first anniversary of grant or the company’s next annual meeting, subject to continued service. Separately, 2,345,711 common shares are reported as indirectly held by ARCH Venture Fund VIII, L.P. and related entities, over which she has no voting or investment control and for which she disclaims beneficial ownership except to the extent of her pecuniary interest.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider Burow Kristina

Role null

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (Right to Buy)	4,310	$0.00	--
Grant/Award	Common Stock	6,839	$0.00	--
holding	Common Stock	--	--	--

Holdings After Transaction: Stock Option (Right to Buy) — 4,310 shares (Direct, null); Common Stock — 117,710 shares (Direct, null); Common Stock — 2,345,711 shares (Indirect, See footnote)

Footnotes (1)

1. Each restricted stock unit ("RSU") represents the contingent right to receive, upon vesting of the RSU, one share of the Issuer's common stock. The shares subject to this RSU vest on the earlier of June 15, 2027 or on the date of the Issuer's next Annual Meeting subject to continued service to the Issuer through such date. Consists of 110,871 shares of common stock and 6,839 RSUs. The shares are held by ARCH Venture Fund VIII, L.P. ("ARCH VIII"). ARCH Venture Partners VIII, L.P. ("GPLP"), as the sole general partner of ARCH VIII, may be deemed to beneficially own the shares held by ARCH VIII. ARCH Venture Partners VIII, LLC ("GPLLC"), as the sole general partner of GPLP, may be deemed to beneficially own the shares held by GPLP. The GPLP and GPLLC disclaim beneficial ownership of such securities, except to the extent of any pecuniary interest therein. The managing directors of the GPLLC are Keith L. Crandell, Clinton Bybee and Robert Nelsen, and they may be deemed to beneficially own the shares held by ARCH VIII. Messrs. Crandell, Bybee and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. The Reporting Person is a managing director of the GPLP. The Reporting Person owns an interest in the GPLP but does not have voting or investment control over the shares held by ARCH VIII. The Reporting Person disclaims ownership of such shares, except to the extent of her pecuniary interest therein. Options to vest and become fully exercisable on the earlier of the first anniversary following the date of grant or on the date of the Issuer's next Annual Meeting, subject to continued service to the Issuer through such date.

Key Figures

RSU grant: 6,839 RSUs Option grant size: 4,310 options Option exercise price: $45.33 per share +4 more

7 metrics

RSU grant 6,839 RSUs Each RSU converts into one common share upon vesting

Option grant size 4,310 options Stock Option (Right to Buy) granted on June 4, 2026

Option exercise price $45.33 per share Conversion/exercise price for 4,310 stock options

Option expiration June 4, 2036 Expiration date of stock option grant

Direct common shares 110,871 shares Common stock directly held after the RSU grant

Total direct equity units 117,710 shares/RSUs Common shares plus 6,839 RSUs following transaction

Indirect holdings via ARCH 2,345,711 shares Common shares held by ARCH VIII and related entities

Key Terms

restricted stock unit ("RSU"), Stock Option (Right to Buy), beneficially own, pecuniary interest, +1 more

5 terms

restricted stock unit ("RSU") financial

"Each restricted stock unit ("RSU") represents the contingent right to receive, upon vesting of the RSU, one share..."

Stock Option (Right to Buy) financial

"Stock Option (Right to Buy) with underlying security title of Common Stock..."

beneficially own financial

"ARCH Venture Partners VIII, L.P. ("GPLP"), as the sole general partner of ARCH VIII, may be deemed to beneficially own the shares..."

Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.

pecuniary interest financial

"The GPLP and GPLLC disclaim beneficial ownership of such securities, except to the extent of any pecuniary interest therein."

disclaims ownership financial

"The Reporting Person disclaims ownership of such shares, except to the extent of her pecuniary interest therein."

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/08/2026 - 04:53 PM Accepted by SEC EDGAR 06/08/2026 - 04:52 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).

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^*

Burow Kristina

(Last) (First) (Middle)

301 BINNEY STREET

(Street)

CAMBRIDGE MASSACHUSETTS 02142

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/04/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	06/04/2026		A		6,839(1)	A	$0.00	117,710(2)	D
Common Stock								2,345,711	I	See footnote(3)(4)

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)	$45.33	06/04/2026		A		4,310		(5)	06/04/2036	Common Stock	4,310	$0	4,310	D

Explanation of Responses:

1. Each restricted stock unit ("RSU") represents the contingent right to receive, upon vesting of the RSU, one share of the Issuer's common stock. The shares subject to this RSU vest on the earlier of June 15, 2027 or on the date of the Issuer's next Annual Meeting subject to continued service to the Issuer through such date.

2. Consists of 110,871 shares of common stock and 6,839 RSUs.

3. The shares are held by ARCH Venture Fund VIII, L.P. ("ARCH VIII"). ARCH Venture Partners VIII, L.P. ("GPLP"), as the sole general partner of ARCH VIII, may be deemed to beneficially own the shares held by ARCH VIII. ARCH Venture Partners VIII, LLC ("GPLLC"), as the sole general partner of GPLP, may be deemed to beneficially own the shares held by GPLP. The GPLP and GPLLC disclaim beneficial ownership of such securities, except to the extent of any pecuniary interest therein.

4. The managing directors of the GPLLC are Keith L. Crandell, Clinton Bybee and Robert Nelsen, and they may be deemed to beneficially own the shares held by ARCH VIII. Messrs. Crandell, Bybee and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein. The Reporting Person is a managing director of the GPLP. The Reporting Person owns an interest in the GPLP but does not have voting or investment control over the shares held by ARCH VIII. The Reporting Person disclaims ownership of such shares, except to the extent of her pecuniary interest therein.

5. Options to vest and become fully exercisable on the earlier of the first anniversary following the date of grant or on the date of the Issuer's next Annual Meeting, subject to continued service to the Issuer through such date.

	/s/ Junlin Ho, Attorney-in-Fact for Kristina Burow	06/08/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What equity awards did Kristina Burow receive from Scholar Rock (SRRK)?

Kristina Burow received 6,839 restricted stock units and a stock option grant for 4,310 shares at an exercise price of $45.33 per share. These awards represent routine director compensation and increase her potential future ownership in Scholar Rock common stock.

How many Scholar Rock (SRRK) shares does Kristina Burow hold directly after this filing?

After the reported awards, Kristina Burow directly holds 110,871 shares of Scholar Rock common stock and 6,839 restricted stock units. The RSUs each convert into one share upon vesting, giving her a mix of current and future equity exposure.

When do Kristina Burow’s new Scholar Rock (SRRK) RSUs vest?

The 6,839 RSUs vest on the earlier of June 15, 2027 or the date of Scholar Rock’s next annual meeting, subject to her continued service. Once vested, each RSU converts into one share of the company’s common stock.

What are the terms of Kristina Burow’s new stock options in Scholar Rock (SRRK)?

She received options for 4,310 shares of Scholar Rock common stock at an exercise price of $45.33 per share. These options vest on the earlier of the first anniversary of grant or the next annual meeting and expire on June 4, 2036.

Are the 2,345,711 Scholar Rock (SRRK) shares reported as indirectly held controlled by Kristina Burow?

No. The 2,345,711 shares are held by ARCH Venture Fund VIII, L.P. and related entities. Footnotes state Burow does not have voting or investment control over these shares and disclaims beneficial ownership except for her pecuniary interest.

Does this Scholar Rock (SRRK) Form 4 show any insider share sales by Kristina Burow?

The Form 4 does not report any open-market sales by Kristina Burow. It primarily reflects grants of RSUs and stock options as compensation, plus a holding entry for shares held by ARCH-related entities where she lacks voting and investment control.