Mo Qatanani - 04 Dec 2025 Form 4 Insider Report for Scholar Rock Holding Corp (SRRK)

Role
CHIEF SCIENTIFIC OFFICER
Signature
/s/ Junlin Ho, Attorney-in-Fact for Mo Qatanani
Issuer symbol
SRRK
Transactions as of
04 Dec 2025
Net transactions value
-$3,275,711
Form type
4
Filing time
05 Dec 2025, 16:53:27 UTC
Previous filing
24 Sep 2025
Next filing
16 Jan 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Qatanani Mo CHIEF SCIENTIFIC OFFICER 301 BINNEY STREET, CAMBRIDGE /s/ Junlin Ho, Attorney-in-Fact for Mo Qatanani 05 Dec 2025 0001980298

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction SRRK Common Stock Options Exercise $1,709,531 +65,625 +60% $26.05 174,589 04 Dec 2025 Direct F1, F2
transaction SRRK Common Stock Options Exercise $381,361 +21,093 +12% $18.08 195,682 04 Dec 2025 Direct F1, F3
transaction SRRK Common Stock Options Exercise $27,250 +5,607 +2.9% $4.86 201,289 04 Dec 2025 Direct F1, F4
transaction SRRK Common Stock Options Exercise $9,761 +1,281 +0.64% $7.62 202,570 04 Dec 2025 Direct F1, F5
transaction SRRK Common Stock Options Exercise $112,500 +11,250 +5.6% $10.00 213,820 04 Dec 2025 Direct F1, F6
transaction SRRK Common Stock Options Exercise $371,243 +23,571 +11% $15.75 237,391 04 Dec 2025 Direct F1, F7
transaction SRRK Common Stock Options Exercise $282,430 +8,035 +3.4% $35.15 245,426 04 Dec 2025 Direct F1, F8
transaction SRRK Common Stock Sale $6,169,788 -136,462 -56% $45.21 108,964 04 Dec 2025 Direct F1, F9, F10

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction SRRK Stock Option (Right to Buy) Options Exercise $0 -65,625 -94% $0.000000 4,375 04 Dec 2025 Common Stock 65,625 $26.05 Direct F1, F11
transaction SRRK Stock Option (Right to Buy) Options Exercise $0 -21,093 -94% $0.000000 1,407 04 Dec 2025 Common Stock 21,093 $18.08 Direct F1, F12
transaction SRRK Stock Option (Right to Buy) Options Exercise $0 -5,607 -100% $0.000000 0 04 Dec 2025 Common Stock 5,607 $4.86 Direct F1, F11
transaction SRRK Stock Option (Right to Buy) Options Exercise $0 -1,281 -50% $0.000000 1,282 04 Dec 2025 Common Stock 1,281 $7.62 Direct F1, F11
transaction SRRK Stock Option (Right to Buy) Options Exercise $0 -11,250 -44% $0.000000 14,063 04 Dec 2025 Common Stock 11,250 $10.00 Direct F1, F13
transaction SRRK Stock Option (Right to Buy) Options Exercise $0 -23,571 -31% $0.000000 53,036 04 Dec 2025 Common Stock 23,571 $15.75 Direct F1, F14
transaction SRRK Stock Option (Right to Buy) Options Exercise $0 -8,035 -19% $0.000000 34,820 04 Dec 2025 Common Stock 8,035 $35.15 Direct F1, F15
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

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).

Explanation of Responses:

Id Content
F1 This transaction was effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted on March 31, 2025.
F2 Consists of 65,625 shares of common stock and 108,964 RSUs.
F3 Consists of 86,718 shares of common stock and 108,964 RSUs.
F4 Consists of 92,325 shares of common stock and 108,964 RSUs
F5 Consists of 93,606 shares of common stock and 108,964 RSUs.
F6 Consists of 104,856 shares of common stock and 108,964 RSUs.
F7 Consists of 128,427 shares of common stock and 108,964 RSUs.
F8 Consists of 136,462 shares of common stock and 108,964 RSUs.
F9 The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $45.00 to $45.46, inclusive. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff upon request.
F10 Consists of 108,964 RSUs.
F11 1,282 shares remain unvested under this stock option. The first vesting event occurred on January 5, 2023 and the remainder vest in fifteen quarterly installments thereafter; provided the reporting person continues to have a service relationship with the Issuer on such vesting date.
F12 1,407 shares remain unvested under this stock option. The first vesting event occurred on April 1, 2022 and the remainder vests in fifteen quarterly installments thereafter; provided the Reporting Person continues to have a service relationship with the Issuer on such vesting date.
F13 14,063 shares remain unvested under this stock option. The first vesting event occurred on April 1, 2023 and the remainder vests in fifteen quarterly installments thereafter; provided the Reporting Person continues to have a service relationship with the Issuer on such vesting date.
F14 53,036 shares remain unvested under this stock option. The first vesting event occurred on April 1, 2024 and the remainder vests in fifteen quarterly installments thereafter; provided the Reporting Person continues to have a service relationship with the Issuer on such vesting date.
F15 34,820 shares remain unvested under this stock option. The first vesting event occurred on April 1, 2025 and the remainder vests in fifteen quarterly installments thereafter; provided the Reporting Person continues to have a service relationship with the Issuer on such vesting date.