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Scholar Rock (SRRK) director Katie Peng sells 5,446 shares under 10b5-1 tax plan

Filing Impact
(Moderate)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Scholar Rock Holding Corp director Katie Peng reported selling 5,446 shares of common stock in open-market transactions on July 1, 2026. The sales were made under a Rule 10b5-1 trading plan adopted on March 20, 2026 to cover tax obligations from the vesting and settlement of restricted stock units.

After these transactions, Peng’s reported holdings consist of 21,500 shares of common stock and 12,801 RSUs, indicating she retains a meaningful equity stake tied to both current ownership and future vesting.

Positive

  • None.

Negative

  • None.
Insider Peng Katie
Role null
Sold 5,446 shs ($293K)
Type Security Shares Price Value
Sale Common Stock 2,988 $53.5598 $160K
Sale Common Stock 2,437 $54.2526 $132K
Sale Common Stock 21 $54.9641 $1K
Holdings After Transaction: Common Stock — 36,759 shares (Direct, null)
Footnotes (1)
  1. This sale was effected pursuant to a Rule 10b-5-1 trading plan adopted on March 20, 2026 to cover tax obligations upon the vesting and settlement of restricted stock units (RSUs). The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $52.970 to $53.965, inclusive. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request. Consists of 23,958 shares of common stock and 12,801 RSUs. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $53.967 to $54.815, inclusive. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request. Consists of 21,521 shares of common stock and 12,801 RSUs. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $54.860 to $55.016, inclusive. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request. Consists of 21,500 shares of common stock and 12,801 RSUs.
Total shares sold 5,446 shares Aggregate open-market sales on July 1, 2026
Sale price (transaction 1) $54.9641 per share Weighted average price for 21 shares sold
Sale price (transaction 2) $54.2526 per share Weighted average price for 2,437 shares sold
Sale price (transaction 3) $53.5598 per share Weighted average price for 2,988 shares sold
Post-transaction common shares 21,500 shares Common stock held after reported sales
Restricted stock units 12,801 RSUs Equity awards referenced in footnotes
Price range (low) $52.970 per share Lowest individual trade price cited in footnotes
Price range (high) $55.016 per share Highest individual trade price cited in footnotes
Rule 10b5-1 trading plan regulatory
"This sale was effected pursuant to a Rule 10b-5-1 trading plan adopted on March 20, 2026"
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
restricted stock units (RSUs) financial
"to cover tax obligations upon the vesting and settlement of restricted stock units (RSUs)"
Restricted stock units (RSUs) are a type of company promise to give employees shares of stock in the future, usually after certain conditions like working for a set time. They are like a gift promised today that you receive later, which can become valuable if the company's stock price goes up. RSUs matter because they are a way companies reward employees and can be a significant part of compensation.
weighted average price financial
"The price reported in Column 4 is a weighted average price."
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
open-market sale financial
"transaction_action": "open-market sale""
An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.
tax obligations financial
"to cover tax obligations upon the vesting and settlement of restricted stock units"
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Form 4 Insider Transactions: What Each Field Means →

FAQ

What insider transaction did Scholar Rock (SRRK) disclose for Katie Peng?
Scholar Rock director Katie Peng reported selling 5,446 shares of common stock on July 1, 2026. The Form 4 describes these as open-market transactions executed under a pre-arranged Rule 10b5-1 trading plan tied to tax obligations on vested RSUs.

At what prices did Katie Peng sell Scholar Rock (SRRK) shares?
The reported sales used weighted average prices, with detailed ranges in the footnotes. Transactions occurred at prices between $52.970 and $55.016 per share, reflecting multiple trades across that band rather than a single execution price for each reported line.

How many Scholar Rock (SRRK) shares does Katie Peng hold after this Form 4?
Following the reported sales, Katie Peng’s position consists of 21,500 shares of common stock and 12,801 restricted stock units. This mix shows ongoing direct ownership plus additional equity that will be delivered as RSUs vest in the future.

Was Katie Peng’s Scholar Rock (SRRK) share sale part of a Rule 10b5-1 plan?
Yes. The filing states the sale was effected under a Rule 10b5-1 trading plan adopted on March 20, 2026. Such pre-arranged plans automate trades over time and are often used to manage liquidity and tax obligations more systematically.

Why did Katie Peng sell Scholar Rock (SRRK) shares according to the filing?
The Form 4 footnote explains that the sale was conducted to cover tax obligations from the vesting and settlement of restricted stock units. This indicates the disposition was primarily tax-related rather than a discretionary reduction of her overall equity exposure.

How many Scholar Rock (SRRK) shares did Katie Peng sell in total?
Across three open-market transactions, Katie Peng sold an aggregate of 5,446 shares of Scholar Rock common stock. The trades are itemized in the Form 4, each with its own share count and weighted average sale price, all on July 1, 2026.
SEC Form 4
FORM 4UNITED 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 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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
07/01/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock07/01/2026S2,988(1)D$53.5598(2)36,759(3)D
Common Stock07/01/2026S2,437(1)D$54.2526(4)34,322(5)D
Common Stock07/01/2026S21(1)D$54.9641(6)34,301(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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. This sale was effected pursuant to a Rule 10b-5-1 trading plan adopted on March 20, 2026 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 $52.970 to $53.965, 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 23,958 shares of common stock and 12,801 RSUs.
4. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $53.967 to $54.815, 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 21,521 shares of common stock and 12,801 RSUs.
6. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $54.860 to $55.016, 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 21,500 shares of common stock and 12,801 RSUs.
/s/ Junlin Ho, attorney-in-fact for Katie Peng07/06/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR