Acumen Pharmaceuticals, Inc.

ABOS·NASDAQ·$2.42Share Price as of 11/2·$147MMarket Cap as of 11/2

Financials

10-QQ3 ended 09/30/2610/26/26 10-QQ2 ended 06/30/2608/12/26 10-QQ1 ended 03/31/2605/12/26 10-KFY 202503/26/26 10-QQ3 ended 09/30/2511/12/25

Disclosures

8-KCurrent report10/30/26 8-KCurrent report10/26/26 8-KCurrent report09/16/26 8-KCurrent report08/12/26 8-KCurrent report06/16/26

Prospectuses and Registrations

S-3Shelf registration10/26/26 S-8Registration of securities for employees08/12/26 424B3Prospectus04/01/26 S-3Shelf registration03/26/26 S-8Registration of securities for employees03/26/26

Proxies

DEF 14ADefinitive proxy04/23/26 DEFA14AAdditional proxy materials04/23/26 DEF 14ADefinitive proxy04/23/25 DEFA14AAdditional proxy materials04/23/25 DEF 14ADefinitive proxy04/22/24

Ownership

144Proposed sale of securities06/17/26 Form 4Insider transaction06/17/26 144Proposed sale of securities06/16/26 144Proposed sale of securities06/15/26 Form 4Insider transaction06/10/26

Other

EFFECTRequest for effectiveness10/28/26 DRSDRS08/12/26 ARSAnnual report to shareholders04/23/26 EFFECTRequest for effectiveness04/01/26 CORRESPCorrespondence with the SEC03/30/26