ABOS ▲ +0.4% - Acumen Pharmaceuticals, Inc. $ABOS - Acumen Pharmaceuticals to Hold Virtual Investor Day on September 16, 2026 Acumen Pharmaceuticals rose 0.4% following an announcement that the company will host a virtual investor day on September 16, 2026, an event typically used by biotech firms to present clinical data, pipeline updates, and strategic priorities to institutional investors and analysts. 10-SEP-2026 04:00 PM ET