0001576885 2026-08-12 2026-08-12 0001576885 1 2026-08-12 2026-08-12 iso4217:USD pure shares S-8 S-8 EX-FILING FEES 0001576885 Acumen Pharmaceuticals, Inc. N/A false S-8 Acumen Pharmaceuticals, Inc. Equity Common stock, $0.0001 par value per share true 10000000 2.29 22900000.00 0.0001381 3162.49 22900000.00 3162.49 0.00 3162.49 1a. Pursuant to Rule 416(a) promulgated under the Securities Act of 1933, as amended (the "Securities Act"), this Registration Statement on Form S-8 shall also cover any additional shares of common stock of Acumen Pharmaceuticals, Inc. (the "Registrant") that may become issuable under the Registrant's Amended and Restated 2021 Equity Incentive Plan (the "Plan") by reason of any stock dividend, stock split, recapitalization, or other similar transaction effected that results in an increase to the number of outstanding shares of the Registrant's common stock, as applicable. 1b. Estimated solely for purposes of calculating the registration fee pursuant to Rule 457(c) and Rule 457(h) based on the average of the high and low prices of Registrant's Common Stock as reported on the Nasdaq Global Select Market on August 6, 2026. 1c. Represents 10,000,000 shares of Common Stock added to the shares available for issuance pursuant to the Plan, which was adopted by the Registrant's Board of Directors on April 21, 2026 and approved by the Registrant's stockholders at the Registrant's 2026 Annual Meeting of Stockholders held on June 3, 2026.