Acumen Pharmaceuticals, Inc. — Director's Dealing 2021

Jul 8, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Acumen Pharmaceuticals, Inc. (ABOS)
CIK: 0001576885
Period of Report: 2021-07-06

Reporting Person: RA CAPITAL MANAGEMENT, L.P. (Director, 10% Owner)
Reporting Person: RA Capital Healthcare Fund LP (Director, 10% Owner)
Reporting Person: RA Capital Nexus Fund II, L.P. (Director)
Reporting Person: Kolchinsky Peter (Director, 10% Owner)
Reporting Person: Shah Rajeev M. (Director, 10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-07-06	Common Stock	C	6122557	—	Acquired	6122557	Indirect
2021-07-06	Common Stock	P	1759332	$16.00	Acquired	7881889	Indirect
2021-07-06	Common Stock	C	1184366	—	Acquired	1184336	Indirect
2021-07-06	Common Stock	P	115668	$16.00	Acquired	1300034	Indirect
2021-07-06	Common Stock	C	588850	—	Acquired	588850	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-07-06	Series B Preferred Stock	$	C	6122557	Disposed		Common Stock (6122557)	Indirect
2021-07-06	Series B Preferred Stock	$	C	1184366	Disposed		Common Stock (1184366)	Indirect
2021-07-06	Series B Preferred Stock	$	C	588850	Disposed		Common Stock (588850)	Indirect

Footnotes

F1: On July 6, 2021, each share of Series B Preferred Stock (the "Preferred Stock") converted into one share of Common Stock of the Issuer without payment of further consideration upon closing of the initial public offering of the Issuer's common stock. The shares had no expiration date.

F2: These securities are held directly by RA Capital Healthcare Fund, L.P. (the "Fund").

F3: These securities are held directly by RA Capital Nexus Fund II, L.P. (the "Nexus Fund II").

F4: These securities are held directly by a separately managed account (the "Account").

F5: RA Capital Management, L.P. (the "Adviser") is the investment manager for the Fund and the Nexus Fund II and the Account. The general partner of the Adviser is RA Capital Management GP, LLC (the "Adviser GP"), of which Dr. Peter Kolchinsky and Mr. Rajeev Shah are the managing members. The Adviser, the Adviser GP, Dr. Kolchinsky and Mr. Shah disclaim beneficial ownership of any of the reported securities, except to the extent of their pecuniary interest therein.