Form 4: Scholar Rock CSO Sells Shares Under 10b5-1 Plan

Scholar Rock's Chief Scientific Officer, Mo Qatanani, sold 8,484 shares of common stock on February 23, 2026, under a pre-arranged 10b5-1 trading plan.

Summary

• Mo Qatanani, Chief Scientific Officer of Scholar Rock Holding Corp (SRRK), sold a total of 8,484 shares of common stock.
• The sales occurred on February 23, 2026, across three separate transactions.
• The transactions were executed pursuant to a Rule 10b5-1 trading plan adopted on March 31, 2025.
• Weighted average sale prices for the shares ranged from $46.52 to $48.66 per share, with reported weighted averages of $46.9422, $47.8588, and $48.48.
• Following these transactions, Mo Qatanani beneficially owns 98,445 Restricted Stock Units (RSUs).

Sentiment

Score: 6

Explanation: StockSavvy.ai views this as a routine insider transaction under a pre-established plan, which typically has a neutral to slightly negative market sentiment as it's not an acquisition of shares, but the pre-planned nature mitigates significant concern.

Positives

• The sale was conducted under a pre-arranged Rule 10b5-1 trading plan, indicating a scheduled transaction rather than an opportunistic one based on immediate non-public information.

Negatives

• The Chief Scientific Officer reduced their direct common stock ownership by 8,484 shares, which can sometimes be perceived as a slight negative by the market, even if pre-planned.

Future Outlook

No forward-looking statements or guidance were provided in this insider transaction report.

Industry Context

StockSavvy.ai notes that insider sales, particularly by C-suite executives, are routinely monitored by investors for insights into management's perception of future company performance. However, sales executed under a Rule 10b5-1 plan are generally viewed as less indicative of future performance concerns, as they are pre-scheduled and not based on immediate, non-public information.

Stakeholder Impact

• Shareholders might note the reduction in direct common stock ownership by a key executive, though the presence of RSUs and the 10b5-1 plan mitigate immediate concerns about management's confidence.

Key Dates

Recommendation

The sale by the Chief Scientific Officer was conducted under a pre-arranged 10b5-1 trading plan, which suggests a planned liquidity event rather than a reaction to new material non-public information. While insider selling can sometimes be a bearish signal, the pre-scheduled nature mitigates immediate concerns, warranting a 'hold' recommendation as this transaction alone does not provide sufficient new information to alter a fundamental investment thesis.

Keywords

Scholar Rock, SRRK, insider trading, Form 4, stock sale, Mo Qatanani, Chief Scientific Officer, 10b5-1 plan