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Scholar Rock Holding Corp's Chief Scientific Officer, Mo Qatanani, reported an equity compensation award in the form of restricted stock units. On February 9, 2026, Qatanani acquired 29,258 RSUs at a stated price of $0.00 per share as a grant or award.
Each RSU represents the right to receive one share of common stock upon vesting. The 29,258 RSUs vest in four equal annual installments over four years, with the first installment scheduled to vest on January 15, 2027, and additional installments vesting annually thereafter, contingent on continued service with the company.
Following this award, Qatanani beneficially owns 114,918 RSUs directly, reflecting total time-based equity incentives tied to ongoing service with Scholar Rock.
Parlavecchio Caryn reported acquisition or exercise transactions in this Form 4 filing.
Scholar Rock Holding Corp’s Chief Human Resources Officer, Caryn Parlavecchio, received a grant of 29,258 restricted stock units (RSUs) of common stock on February 9, 2026 at a price of $0.00 per share.
The RSUs vest in four equal annual installments, with the first installment vesting on January 15, 2027 and the remaining installments vesting annually thereafter, contingent on continued service. Following this award, Parlavecchio directly holds 178,122 common-stock-related interests, consisting of 78,283 shares of common stock and 99,839 RSUs.
Marantz Jing L. reported acquisition or exercise transactions in this Form 4 filing.
Scholar Rock Holding Corp’s Chief Medical Officer, Jing L. Marantz, received a grant of 34,482 restricted stock units (RSUs) of common stock on February 9, 2026. The award was reported at a price of $0.00 per share as a compensation grant.
Each RSU represents the right to receive one share of common stock upon vesting. The RSUs vest in four equal annual installments over four years, with the first installment scheduled for January 15, 2027, as long as Dr. Marantz continues a service relationship with the company on each vesting date. After this grant, she directly holds 130,169 common shares and RSUs in total, consisting of 24,974 common shares and 105,195 RSUs.
Ho Junlin reported acquisition or exercise transactions in this Form 4 filing.
Scholar Rock Holding Corp’s general counsel, Junlin Ho, received a grant of 36,572 shares of common stock in the form of restricted stock units. These RSUs vest in four annual installments, starting on January 15, 2027, as long as Ho remains in service with the company.
After this award, Ho directly beneficially owns 251,125 units in total, consisting of 121,471 shares of common stock and 129,654 RSUs, aligning compensation with the long-term performance of Scholar Rock’s stock.
Hallal David reported acquisition or exercise transactions in this Form 4 filing.
Scholar Rock Holding Corp reported that Chief Executive Officer and director David Hallal received a grant of 128,004 restricted stock units (RSUs) of common stock on February 9, 2026 at a price of $0.00 per share. These RSUs vest in four annual installments, starting on January 15, 2027, subject to his continued service.
Following this award, Hallal beneficially owns 1,669,649 shares of common stock directly, consisting of shares and both time-based and performance-based RSUs. In addition, 205,000 shares are held indirectly by the Hallal Family Irrevocable Trust, where his spouse is a trustee and he disclaims beneficial ownership beyond his pecuniary interest.
Woods Keith reported acquisition or exercise transactions in this Form 4 filing.
Scholar Rock Holding Corp’s Chief Operating Officer Keith Woods was awarded 47,021 shares of common stock in the form of restricted stock units on February 9, 2026 at a grant price of $0.00. These RSUs vest in four equal annual installments starting January 15, 2027, as long as he remains in service.
After this award, Woods beneficially owns 630,275 equity interests, consisting of 33,254 shares of common stock, 147,021 time-based RSUs, and 450,000 RSUs subject to both performance and time-based vesting conditions.
Wellington Management Group and affiliated entities filed a Schedule 13G reporting a passive ownership stake in Scholar Rock Holding Corporation common stock. They report beneficial ownership of 5,759,428 shares, representing 5.65% of the outstanding common stock as of 12/31/2025.
The Wellington entities report no sole voting or dispositive power, but significant shared voting and dispositive power across the group, with Wellington Management Company LLP holding shared voting power over 4,973,254 shares. The filing states the position is held in the ordinary course of business and not for the purpose of changing or influencing control of Scholar Rock.
Scholar Rock Holding Corp saw a large warrant exercise by a 10% owner–affiliated group. On December 11, 2025, a warrant to buy 1,575,008 shares of common stock at $7.35 per share was exercised, eliminating the warrant position.
Following the transaction, entities associated with Invus Global Management, LLC, Siren, L.L.C. and related investment vehicles held 10,825,013 shares of Scholar Rock common stock directly. The filing notes a chain of control from Invus Public Equities, L.P. up through Invus Global Management, Siren, and ultimately to Mr. Raymond Debbane, with standard disclaimers of beneficial ownership among the reporting persons.
Scholar Rock Holding Corp’s chief scientific officer, Mo Qatanani, reported two stock sales on January 22, 2026 under a pre-arranged Rule 10b5-1 trading plan adopted on March 31, 2025. He sold 2,119 shares of common stock at a weighted average price of $45.8655 and another 12,779 shares at a weighted average price of $46.8541, with each sale executed through multiple trades within the stated price ranges. After these transactions, his reported beneficial holdings consist of 85,660 restricted stock units (RSUs), and the earlier figure of 98,439 beneficially owned securities reflected 12,779 shares plus these RSUs before the second sale.
Scholar Rock Holding Corp. filed a Form 144 notice for a planned sale of 14,898 shares of its common stock. The shares are to be sold through J.P. Morgan Securities LLC on Nasdaq, with an aggregate market value of 686,053. The securities were acquired on 01/15/2026 as a restricted stock award from the issuer, with the same date listed for payment and the nature of payment noted as “NA.”
The filing notes that 102,007,457 shares of common stock were outstanding, providing context for the planned sale. It also discloses that a seller named Mohammed Qatanani sold 136,462 common shares for gross proceeds of 6,169,788 on 12/04/2025, and 13,112 common shares for 592,611 on 01/14/2026, over the prior three months.