ACUMEN PHARMACEUTICALS INC

Ticker: ABOS CUSIP: 00509G209 Class: Common Stock

DRIEHAUS CAPITAL MANAGEMENT LLC's Holding History (CIK: 0000938206)

Note: Option positions (PUT/CALL) are excluded.

Q1 2023

Shares 550,349 Value ($000) $2,234 Avg Close $5.22 Range $3.74 - $6.83

Q4 2022

Shares 563,864 Value ($000) $3,045 Avg Close $6.72 Range $4.58 - $10.68

Q3 2022

Shares 571,424 Value ($000) $5,731 Avg Close $5.74 Range $4.09 - $10.97

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2023	550,349	$2,234	$5.22	$3.74 - $6.83
Q4 2022	563,864	$3,045	$6.72	$4.58 - $10.68
Q3 2022	571,424	$5,731	$5.74	$4.09 - $10.97