Form 4 Filing for Acumen Pharmaceuticals, Inc.

Porter Derrell, a director at Acumen Pharmaceuticals, Inc. (ABOS), reported several transactions on June 15-17, 2026. Derrell acquired 6,460 shares of Common Stock at $1.07 per share and disposed of 6,460 shares at a weighted average price of $2.345. Additionally, 12,800 shares were disposed of at $2.326 per share on June 16. On June 17, Derrell acquired another 13,040 shares at $1.07 and disposed of 13,040 shares at $2.325. These transactions involved the exercise and disposal of stock options. The weighted average sale price on June 16 was $2.326, with shares sold between $2.305 and $2.345. The options exercised vested on the date of the 2026 annual stockholder meeting and expire on June 4, 2035.