Form 4: Scholar Rock CSO Sells Shares for Tax Obligations

Scholar Rock's Chief Scientific Officer, Mo Qatanani, sold 8,406 shares of common stock to cover tax withholding obligations related to vested restricted stock units.

Summary

• Mo Qatanani, Chief Scientific Officer of Scholar Rock Holding Corp (SRRK), reported a sale of common stock.
• The transaction involved 8,406 shares sold at a price of $44.4777 per share on January 16, 2026.
• This sale was a 'sell to cover' transaction, mandated by the issuer to fund tax withholding obligations associated with the vesting of restricted stock units (RSUs).
• The RSUs vested on January 15, 2026, and were granted on February 14, 2022, and February 12, 2024.
• Following the transaction, Mo Qatanani beneficially owns 100,558 securities, consisting of 14,898 shares of common stock and 85,660 RSUs.

Sentiment

Score: 5

Explanation: The transaction is a non-discretionary 'sell to cover' for tax purposes, which is a routine event and does not reflect a change in the executive's investment sentiment or the company's prospects.

Positives

• Restricted stock units (RSUs) granted to the Chief Scientific Officer have fully vested, indicating successful achievement of vesting conditions.

Future Outlook

N/A

Management Comments

• The sale represents the number of shares required to be sold by the Reporting Person to cover the tax withholding obligation in connection with the vesting of restricted stock units, and does not represent a discretionary trade by the Reporting Person.

Industry Context

N/A

Stakeholder Impact

• Shareholders: Minimal impact as the transaction is a routine, non-discretionary sale for tax purposes, not indicative of a change in insider sentiment.
• Employees: Reflects standard equity compensation practices within the company.

Key Dates

Recommendation

The reported transaction is a non-discretionary 'sell to cover' sale by the Chief Scientific Officer to satisfy tax withholding obligations upon the vesting of restricted stock units. This is a standard practice for equity compensation and does not indicate a change in the company's fundamentals or the executive's long-term view, thus warranting a 'hold' recommendation based solely on this filing.

Keywords

Scholar Rock, SRRK, Mo Qatanani, Chief Scientific Officer, CSO, Form 4, insider transaction, stock sale, RSU, restricted stock units, equity compensation, tax withholding