Form 4 Filing for Cogent Biosciences, Inc.

This filing details transactions by Arlene Morris, a director at Cogent Biosciences, Inc. (COGT), on August 27, 2026. Morris acquired 41,927 shares of Common Stock at $5.64 per share and an additional 3,583 shares at $2.52 per share, all under a Rule 10b5-1 trading plan. Concurrently, Morris disposed of 42,349 shares at a weighted average price of $37.0925 and 3,161 shares at a weighted average price of $37.5396. The filing also notes the exercise of stock options for 41,927 shares and 3,583 shares, with exercise prices of $5.64 and $2.52 respectively. Following these transactions, Morris holds 0 shares directly, with 2,773 shares from vested options remaining.