Laura Stoppel - Jun 30, 2021 Form 4 Insider Report for Acumen Pharmaceuticals, Inc. (ABOS)

Role: Director
Signature: /s/ Katherine Denby, Attorney-in-Fact
Stock symbol: ABOS
Transactions as of: Jun 30, 2021
Transactions value $: $0
Form type: 4
Date filed: 7/2/2021, 04:21 PM
Next filing: Jun 17, 2022

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	ABOS	Stock Option (Right to Buy)	Award	$0	+34K		$0.00	34K	Jun 30, 2021	Common Stock	34K	$16.00	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The shares subject to the option will vest in equal monthly installments over a three year period such that the option is fully vested on the third anniversary of the date of grant, subject to the Reporting Person's continuous service through each such vesting date and shall vest and become immediately exercisable prior to the effectiveness of a change in control.
F2	Under the Reporting Person's arrangement with RA Capital Management, L.P. (the "Adviser"), the Reporting Person holds the option for the benefit of the RA Capital Healthcare Fund, L.P. (the "Fund"), RA Capital Nexus Fund II, L.P. (the "Nexus Fund II") and a separately managed account (the "Account"). The Reporting Person is obligated to turn over to the Adviser any net cash or stock received upon exercise of the option, which will offset advisory fees owed by the Fund, Nexus Fund II and the Account to the Adviser. The Reporting Person therefore disclaims beneficial ownership of the option and underlying common stock.

Content

The shares subject to the option will vest in equal monthly installments over a three year period such that the option is fully vested on the third anniversary of the date of grant, subject to the Reporting Person's continuous service through each such vesting date and shall vest and become immediately exercisable prior to the effectiveness of a change in control.

Under the Reporting Person's arrangement with RA Capital Management, L.P. (the "Adviser"), the Reporting Person holds the option for the benefit of the RA Capital Healthcare Fund, L.P. (the "Fund"), RA Capital Nexus Fund II, L.P. (the "Nexus Fund II") and a separately managed account (the "Account"). The Reporting Person is obligated to turn over to the Adviser any net cash or stock received upon exercise of the option, which will offset advisory fees owed by the Fund, Nexus Fund II and the Account to the Adviser. The Reporting Person therefore disclaims beneficial ownership of the option and underlying common stock.