Scholar Rock Holding Corporation Form 4 Filings

Scholar Rock Holding Corp director Michael Gilman sold 2,544 shares of common stock in open-market transactions on July 1, 2026. The sales were made under a Rule 10b-5-1 trading plan adopted on March 31, 2026 to cover tax obligations from vesting restricted stock units.

Prices ranged from about $52.97 to $55.01, reported as weighted average prices for each trade. After these transactions, Gilman holds 52,672 shares of common stock and 6,839 restricted stock units (RSUs), indicating he retains a substantial equity position in the company.

Scholar Rock Holding Corp director Kristina Burow reported routine insider sales tied to equity compensation. On July 1, 2026, she sold a total of 3,053 shares of common stock in open-market transactions at weighted average prices around $53–$54 per share. According to the filing, these trades were executed under a Rule 10b-5-1 trading plan adopted on March 31, 2026 to cover tax obligations from the vesting and settlement of restricted stock units (RSUs). After these transactions, she continues to hold 107,818 shares of common stock and 6,839 RSUs directly, and has an indirect interest in 2,345,711 shares held by ARCH Venture Fund VIII, L.P., over which she does not have voting or investment control and for which she disclaims beneficial ownership beyond any pecuniary interest.

Scholar Rock Holding Corp director Joshua Reed sold 3,053 shares of common stock in open-market transactions. The sales on July 1, 2026 were executed at weighted average prices of $53.4958 and $54.2814 per share under a pre-arranged Rule 10b5-1 trading plan. The filing notes the plan was adopted to cover tax obligations tied to the vesting and settlement of restricted stock units, indicating these are largely tax-related, scheduled sales. Following the transactions, Reed holds 19,518 equity-linked units, consisting of 12,679 shares of common stock and 6,839 RSUs.

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.

FLIER JEFFREY S. reported acquisition or exercise transactions in this Form 4 filing.

Scholar Rock Holding Corp director Jeffrey S. Flier received new equity awards as part of his compensation. He was granted 6,839 restricted stock units, each representing one share of common stock upon vesting, and 4,310 stock options to buy common stock at $45.33 per share.

The RSUs vest on the earlier of June 15, 2027 or the company’s next Annual Meeting, as long as he continues to serve the company. The options vest and become fully exercisable on the earlier of the first anniversary of the grant date or the next Annual Meeting, also subject to continued service. After the RSU grant, his direct common stock position is 30,909 shares, including 24,070 shares of common stock and 6,839 RSUs.

Scholar Rock Holding Corp director Joshua Reed received equity compensation in the form of restricted stock units and stock options. He was granted 6,839 RSUs, each representing one share of common stock upon vesting, which occurs on the earlier of June 15, 2027 or the company’s next annual meeting, subject to continued service. He also received options for 4,310 shares of common stock at an exercise price of $45.33 per share, vesting on the earlier of the first anniversary of the grant date or the next annual meeting, again subject to continued service. Following these awards, Reed directly holds or has rights to 22,571 common shares and RSUs in total, plus 4,310 stock options, indicating a routine, compensation-related increase in his equity stake rather than any open-market buying or selling.

Scholar Rock Holding Corp director Richard Brudnick received equity compensation awards rather than buying shares on the market. He was granted 6,839 restricted stock units, each representing one share of common stock that will vest on the earlier of June 15, 2027 or the company’s next Annual Meeting, subject to continued service. Following this grant, he holds 21,896 common-share interests, including these RSUs. He was also granted stock options for 4,310 shares of common stock at an exercise price of $45.33 per share, which will vest and become fully exercisable on the earlier of the first anniversary of the grant date or the next Annual Meeting, again contingent on continued service.

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.

Gilman Michael reported acquisition or exercise transactions in this Form 4 filing.

Scholar Rock Holding Corp director Michael Gilman received new equity awards. He was granted 6,839 restricted stock units, each representing one future common share, vesting on the earlier of June 15, 2027 or the next Annual Meeting, subject to continued service. He also received options to buy 4,310 shares at $45.33 per share, expiring in 2036, which vest on the earlier of one year from grant or the next Annual Meeting. Following these awards, his direct holdings total 62,055 common shares, including 55,216 shares and 6,839 RSUs, plus 4,310 stock options.

Director Katie Peng received new equity awards from Scholar Rock Holding Corp6,839 restricted stock units (RSUs), each representing one future share of common stock. These RSUs vest on the earlier of June 15, 2027 or the company’s next Annual Meeting, subject to continued service.

Peng was also granted 4,310 stock options to buy common stock at an exercise price of $45.33 per share, expiring on June 4, 2036. The options vest and become fully exercisable on the earlier of the first anniversary of the grant date or the next Annual Meeting, again subject to continued service. After these grants, she holds 39,747 shares/RSUs-equivalent in total, consisting of 26,201 common shares and 13,546 RSUs, plus 4,310 stock options.

Scholar Rock Holding Corp director Srinivas Akkaraju received new equity awards. He was granted 6,839 restricted stock units, each representing one future share of common stock upon vesting, and now directly holds 27,971 common shares including these RSUs and 21,132 already‑held shares.

He was also granted options for 4,310 shares of common stock at an exercise price of $45.33 per share, expiring on June 4, 2036. The RSUs vest on the earlier of June 15, 2027 or the next Annual Meeting, and the options vest on the earlier of the first anniversary of grant or the next Annual Meeting, in each case subject to continued service. Indirectly, entities he oversees hold 6,367,614 and 530,038 additional shares.

Scholar Rock Holding Corp director Kristina Burow exercised stock options to acquire 89,800 shares of Common Stock on April 23, 2026 at exercise prices of $8.36, $9.11, $4.75 and $26.78 per share. Following these exercises, she holds 110,871 Common Shares directly, reflecting shares obtained through option exercises with no reported same-day sales. Separately, an entity, ARCH Venture Fund VIII, L.P., holds 2,345,711 Common Shares indirectly associated with Burow; she has an economic interest but no voting or investment control over those shares, which are attributed to ARCH VIII and related ARCH entities.

Scholar Rock Holding Corp Chief Operating Officer Keith Woods completed a mandated sale of 10,220 shares of common stock at $49.5745 per share. The sale was executed solely to cover tax withholding obligations arising from the vesting of restricted stock units on April 15, 2026 and was not a discretionary trade.

After this transaction, Woods directly holds 620,055 shares. His equity position also includes 122,021 restricted stock units subject to time-based vesting and 450,000 restricted stock units subject to performance- and time-based vesting, aligning his compensation with future company performance and continued service.

Scholar Rock Holding Corp director and President of R&D Akshay Vaishnaw sold 12,246 shares of common stock in an open-market transaction at $49.5745 per share. According to the disclosure, this sale was mandated solely to cover tax withholding on restricted stock units that vested on April 15, 2026, and was executed as a required “sell to cover” transaction rather than a discretionary trade. After the sale, Vaishnaw directly holds 630,542 shares, along with vested and unvested RSU awards that continue to vest over four years, subject to ongoing service.

Scholar Rock Holding Corp's Chief Financial Officer Vikas Sinha reported an open-market sale of 10,410 shares of common stock at an average price of $49.5745 per share on April 16, 2026. According to the footnotes, this sale was required solely to cover tax withholding obligations tied to restricted stock units that vested on April 15, 2026, under the company’s equity incentive plans and was not a discretionary trade.

After this transaction, Sinha’s reported equity position totals 619,856 equity-linked interests, consisting of 47,835 shares of common stock, 122,021 time-based RSUs, and 450,000 RSUs subject to performance- and time-based vesting conditions. The RSU awards referenced in the transaction were granted on April 27, 2025 and vest annually over four years, contingent on continued service.

Scholar Rock Holding Corp's CEO David Hallal reported a tax-driven share sale tied to equity compensation. On April 15, 2026, restricted stock units vested, and 30,615 shares of common stock were sold at an average price of $49.5745 per share to cover related tax withholding obligations. The filing states this mandatory "sell to cover" transaction was executed through a designated brokerage firm and was not a discretionary trade by Hallal. After the sale, he directly held 1,639,034 shares of common stock. He also has additional exposure through 198,530 shares of common stock, 315,504 time-based RSUs, and 1,125,000 performance- and time-based RSUs, plus indirect holdings in the Hallal Family Irrevocable Trust, for which he disclaims full beneficial ownership.

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.

Scholar Rock Holding Corp's chief medical officer, Jing L. Marantz, reported an open-market sale of 4,157 shares of common stock on February 17, 2026 at a price of $46.5282 per share. This transaction was executed to cover tax withholding obligations arising from the vesting of restricted stock units on February 15, 2026 and was mandated under the company’s equity incentive plan rather than being a discretionary trade.

After this sale, Marantz held 126,012 shares of common stock, consisting of 29,388 shares of common stock and 96,624 restricted stock units that continue to vest annually over four years, subject to continued service with the company.

Scholar Rock Holding Corp’s general counsel, Junlin Ho, reported an open-market sale of 9,580 shares of common stock on February 17, 2026 at an average price of $46.5282 per share. According to the footnote, this sale was a mandated “sell to cover” transaction to fund tax withholding arising from the vesting of restricted stock units (RSUs) on February 15, 2026, and was not a discretionary trade.

The RSUs that vested were granted on February 13, 2023 and March 10, 2025, each representing the right to receive one share of common stock upon vesting. After this tax-related sale, Ho’s holdings consist of 131,646 shares of common stock and 109,899 RSUs, which vest annually over four years, subject to a continued service relationship with the company.

Scholar Rock Holding Corp's CHRO, Caryn Parlavecchio, reported a mandatory sale of common stock tied to tax withholding on vested RSUs. On this Form 4, she sold 9,035 shares of common stock in an open-market transaction at an average price of $46.5282 per share to cover tax obligations from restricted stock units that vested on February 15, 2026. The footnote explains this was a required "sell to cover" transaction under the company’s equity incentive plans and not a discretionary trade. After the sale, she beneficially owns 169,087 equity-linked interests, consisting of 86,859 shares of common stock and 82,228 RSUs that continue to vest annually over four years, subject to continued service.

Scholar Rock Holding Corp’s Chief Scientific Officer Mo Qatanani reported an open-market sale of 7,989 shares of common stock at an average price of $46.5282 per share.

According to the footnotes, this was a mandated “sell to cover” transaction to satisfy tax withholding obligations arising from restricted stock units (RSUs) that vested on February 15, 2026, under the company’s equity incentive plans, and was not a discretionary trade. After this transaction, Qatanani’s reported holdings consist of 8,484 shares of common stock and 98,445 RSUs, which together total 106,929 units of equity-related interests.

Vaishnaw Akshay reported acquisition or exercise transactions in this Form 4 filing.

Scholar Rock Holding Corp reported that President of R&D and director Akshay Vaishnaw received a grant of 47,021 restricted stock units (RSUs) of common stock on February 9, 2026, at a stated price of $0.00 per share as a compensatory award.

Each RSU represents one share of common stock upon vesting and vests in four equal annual installments over four years, starting on January 15, 2027, contingent on continued service. After this grant, Vaishnaw directly holds 642,788 equity interests, consisting of 45,767 shares of common stock, 147,021 time-based RSUs, and 450,000 performance- and time-based RSUs.

Sinha Vikas reported acquisition or exercise transactions in this Form 4 filing.

Scholar Rock Holding Corp’s Chief Financial Officer Vikas Sinha received a grant of 47,021 restricted stock units on February 9, 2026 at a stated price of $0.00 per unit. These RSUs vest in four equal annual installments starting on January 15, 2027, as long as he remains in service. After this grant, he beneficially owns 630,266 equity-linked interests, consisting of 33,245 shares of common stock, 147,021 time-based RSUs, and 450,000 performance- and time-based RSUs.

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.

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's chief scientific officer, Mo Qatanani, reported an automatic sale of company stock related to equity compensation. On January 16, 2026, Qatanani sold 8,406 shares of common stock at an average price of $44.4777 per share. According to the footnotes, this was a mandatory "sell to cover" transaction to satisfy tax withholding obligations arising from the vesting of restricted stock units on January 15, 2026, rather than a discretionary trade.

After this transaction, Qatanani beneficially owned a total of 100,558 equity-based units, consisting of 14,898 shares of common stock and 85,660 restricted stock units that are fully vested.

Scholar Rock Holding Corp’s Chief Human Resources Officer, Caryn Parlavecchio, reported a required tax-related sale of company stock. On January 16, 2026, she sold 6,600 shares of common stock at an average price of $44.4777 per share to cover tax withholding triggered by the vesting of restricted stock units on January 15, 2026. The filing notes this was a mandatory “sell to cover” transaction under the company’s equity incentive plans, not a discretionary trade. After the sale, she beneficially owned 148,864 equity interests, consisting of 78,283 shares of common stock and 70,581 RSUs.

Scholar Rock Holding Corp’s chief medical officer, Jing L. Marantz, sold 5,798 shares of common stock on January 16, 2026 at $44.4777 per share. The filing explains this sale was required to cover tax withholding from the vesting of restricted stock units (RSUs) on January 15, 2026 under the company’s equity incentive plans, and it was not a discretionary trade.

These shares relate to RSU awards granted on February 12, 2024. After the tax-related sale, Marantz beneficially owns 95,687 shares, consisting of 24,974 shares of common stock and 70,713 RSUs. Each RSU is fully vested and represents the right to receive one share of Scholar Rock common stock.

Scholar Rock Holding Corp’s general counsel, Junlin Ho, reported a small insider stock sale tied to restricted stock unit (RSU) vesting. On January 16, 2026, Ho sold 8,016 shares of common stock at an average price of $44.4777 per share.

According to the filing, this sale was mandated under the company’s equity incentive plans solely to cover tax withholding obligations from RSUs that vested on January 15, 2026, and did not represent a discretionary trade. After the transaction, Ho beneficially owned 214,553 equity-linked interests, consisting of 121,471 shares of common stock and 93,082 RSUs, all tied to fully vested awards.

Scholar Rock Holding Corp’s chief scientific officer, Mo Qatanani, reported option exercises and a share sale in company stock. On January 14, 2026, Qatanani exercised several stock options covering a total of 13,112 shares of common stock at exercise prices of $7.62, $10, $15.75, $18.08, and $35.15 per share.

On the same day, Qatanani sold 13,112 shares of common stock at a weighted average price of $45.1961 per share under a Rule 10b5-1 trading plan adopted on March 31, 2025. After these transactions, Qatanani directly holds 108,964 restricted stock units (RSUs) and still has multiple stock options outstanding with unvested portions of 961, 11,250, 47,143, and 32,142 shares, subject to continued service-based vesting.

Scholar Rock Holding Corp's Chief Financial Officer Vikas Sinha reported an automatic sale of common stock linked to equity award vesting. On January 13, 2026, he sold 16,755 shares of Scholar Rock common stock at $42.70 per share in a transaction coded "S".

According to the disclosure, the shares were sold solely to cover tax withholding obligations arising from the vesting of performance- and time-based restricted stock units (PSUs) and did not represent a discretionary trade. The vesting relates to awards granted on April 27, 2025, including 50,000 PSUs that vested on January 12, 2026, with additional PSUs scheduled to vest through April 27, 2029 if service and performance conditions are met. Following the transaction, Sinha's equity position consists of 33,245 shares of common stock, 100,000 restricted stock units, and 450,000 PSUs.

Scholar Rock Holding Corp's Chief Operating Officer, R. Keith Woods, reported a sale of common stock that was executed solely to cover taxes on recently vested performance-based restricted stock units (PSUs). On January 13, 2026, he sold 16,746 shares of common stock at $42.70 per share in a mandated "sell to cover" transaction under the company’s equity incentive plans, rather than a discretionary trade.

These shares relate to PSU awards granted on April 27, 2025, with 50,000 PSU shares vesting on January 12, 2026 and additional tranches scheduled through April 27, 2029 if service and performance conditions are met. After the tax-related sale, Woods has beneficial ownership of 583,254 share-based interests, consisting of 33,254 shares of common stock, 100,000 time-based RSUs and 450,000 PSUs.

Scholar Rock Holding Corp director and President of R&D Akshay Vaishnaw reported a mandatory tax-related share sale. On 01/13/2026, he sold 20,438 shares of common stock at $42.70 per share in a transaction coded "S." According to the notes, this was a "sell to cover" sale required to satisfy tax withholding from vesting performance- and time-based restricted stock units (PSUs), and is not a discretionary trade.

After the transaction, he beneficially owned 595,767 common share equivalents. This consists of 45,767 shares of common stock, 100,000 restricted stock units, and 450,000 PSUs that vest over time and based on Scholar Rock’s stock price performance, with unvested PSUs forfeited if not vested by April 27, 2029.

Scholar Rock Holding Corp Chief Executive Officer and director David Hallal reported a mandatory share sale linked to equity award vesting. On 01/13/2026, he sold 57,450 shares of common stock at $42.7 per share, solely to cover tax withholding arising from the vesting of performance- and time-based restricted stock units (PSUs) under the company’s equity incentive plans. The transaction was executed as a required “sell to cover” through a designated broker and is noted as not being a discretionary trade.

The vested shares relate to PSU awards granted on April 27, 2025, with 125,000 shares vesting on January 12, 2026, another 125,000 scheduled to vest on April 27, 2027, and additional tranches tied to future stock price and service-based conditions through April 27, 2029, after which any unvested PSUs are forfeited. Following the reported sale, Hallal directly holds 1,541,645 shares of common stock, and a further 205,000 shares are held indirectly by the Hallal Family Irrevocable Trust – 2012, where his spouse serves as trustee and beneficial ownership is disclaimed except for any pecuniary interest.

Scholar Rock Holding Corp director reports tax-related stock sales. A company director filed a Form 4 for two sales of common stock on 12/16/2025. The director sold 726 shares at a weighted average price of $43.8761, with individual trade prices ranging from $43.39 to $44.38. A second sale covered 280 shares at a weighted average price of $44.6344, with prices ranging from $44.39 to $45.23. These transactions were executed under a Rule 10b5-1 trading plan adopted on November 20, 2024 to cover tax obligations upon the vesting and settlement of restricted stock units. Following the transactions, the director beneficially owns 32,908 equity awards, consisting of 14,844 shares of common stock and 18,064 restricted stock units (RSUs), all held directly.

Scholar Rock Holding Corp director Srinivas Akkaraju reported multiple transactions in the company’s common stock. On 10/07/2025, he indirectly purchased 12,796, 12,400 and 4,403 shares through Samsara Opportunity Fund, L.P. at weighted average prices of $39.31, $40.18 and $40.97 per share, increasing that fund’s indirect holdings to 530,038 shares.

On 12/12/2025, warrants with a $7.35 exercise price were exercised through Samsara BioCapital, L.P., resulting in the acquisition of 1,064,804 shares of common stock and raising that entity’s indirect holdings to 6,367,614 shares, with the related warrant position reduced to zero. The form also shows 21,132 shares of common stock held directly. Footnotes explain that the 10/07/2025 purchase prices are weighted averages for multiple trades within specified price ranges.

David Hallal, who serves as Chief Executive Officer and a Director of Scholar Rock Holding Corp (SRRK), transferred 205,000 shares of the issuer's common stock to the Hallal Family Irrevocable Trust - 2012 on 10/08/2025 for no consideration (reported price $0). The filing notes the reporting person’s spouse is a trustee of the trust and that he disclaims beneficial ownership of the transferred shares except to the extent of any pecuniary interest.

After the reported transfer, the filing shows the reporting person beneficially owns 1,599,095 shares, consisting of 99,095 shares of common stock and 1,500,000 restricted stock units. The statement was signed by an attorney-in-fact on 10/09/2025.

Srinivas Akkaraju, a director, reported multiple purchases of Scholar Rock Holding Corp (SRRK) common stock in early October 2025. The filings show net additions through affiliated vehicles, primarily Samsara Opportunity Fund, L.P., bringing the fund's reported beneficial ownership to 500,439 shares following purchases executed on 10/03/2025 and 10/06/2025. Purchase prices are disclosed as weighted averages across multiple trades, with reported ranges from $35.14 up to $39.84 depending on the tranche. The report also notes prior shares held by Samsara BioCapital, L.P. and contains standard disclaimers that the reporting person disclaims beneficial ownership except to the extent of pecuniary interest.

Mo Qatanani, Chief Scientific Officer of Scholar Rock Holding Corp (SRRK), reported an insider sale on a Form 4. On 09/22/2025 the reporting person sold 3,353 shares of Scholar Rock common stock at a weighted average price of $30.6729 under a Rule 10b5-1 trading plan adopted March 31, 2025. After the sale the reporting person beneficially owns 108,964 shares represented by RSUs. The Form 4 was signed by an attorney-in-fact on behalf of the reporting person and filed on 09/24/2025. The filing discloses the sale occurred in multiple transactions at prices ranging from $30.33 to $30.85, and the weighted average reflects those executions.

Katie Peng, a director of Scholar Rock Holding Corp (SRRK), reported sales of common stock on 09/16/2025 under a Rule 10b5-1 plan adopted 11/20/2024 to cover tax obligations from RSU vesting. The filing shows two sale events: 930 shares sold at a weighted average price of $32.4761 and 76 shares sold at a weighted average price of $33.1963, executed in multiple transactions at prices ranging $31.85–$33.73. After these sales Ms. Peng beneficially owns 33,990 shares following the first reported sale and 33,914 shares following the second, held directly and including unvested RSUs. The Form 4 was signed by an attorney-in-fact on 09/17/2025.

Insider transaction summary for Scholar Rock Holding Corp (SRRK): The reporting person, Mo Qatanani, Chief Scientific Officer, completed a sell-to-cover transaction on 09/16/2025 disposing of 3,178 shares of common stock at $33.52 per share to satisfy tax withholding arising from RSU vesting. After the transaction, the reporting person beneficially owns 112,317 shares, comprised of 3,353 issued shares and 108,964 unvested restricted stock units that vest over four years from grant dates in 2021 and 2022. The sell-to-cover was executed by a brokerage firm as required under the issuer's equity plan and was not a discretionary trade by the reporting person.