Acumen Pharmaceuticals, Inc. — Director's Dealing 2021

Jul 1, 2021

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: Acumen Pharmaceuticals, Inc. (ABOS)
CIK: 0001576885
Period of Report: 2021-06-30

Reporting Person: Sands Capital Ventures Discovery Fund III, L.P. (10% Owner)
Reporting Person: Sands Capital Global Venture Fund II, L.P. (10% Owner)
Reporting Person: Sands Capital Life Sciences Pulse Fund, LLC (10% Owner)
Reporting Person: SANDS FRANK M. (10% Owner)

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Series A-1 Preferred Stock	$		Common Stock (1124729)		Direct
Series B Preferred Stock	$		Common Stock (1842346)		Direct

Footnotes

F1: Each share of Series A-1 Preferred Stock and each share of Series B Preferred Stock will automatically convert into one share of Common Stock of the Issuer upon the closing of the Issuer's initial public offering. The Series A-1 Preferred and the Series B Preferred Stock have no expiration date.

F2: Represents Series A-1 Preferred Stock held by Sands Capital Ventures Discovery Fund III, L.P. ("Sands Discovery Fund "). Sands Capital Ventures Discovery Fund III-GP, LLC ("Sands Discovery GP") is the general partner of Sands Discovery Fund. Sands Discovery GP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. Frank M. Sands holds ultimate voting and investment power over these securities and may be deemed to beneficially own the securities.

F3: Represents 921,173 shares of Series B Preferred Stock held by Sands Capital Global Venture Fund II, L.P. ("Sands Venture Fund") and 921,173 shares of Series B Preferred Stock held by Sands Capital Life Sciences Pulse Fund, LLC ("Sands Pulse Fund"). Sands Capital Global Venture Fund II-GP, L.P. ("Sands Venture GP L.P.") is the general partner of Sands Venture Fund. Sands Capital Global Venture Discovery Fund II-GP, LLC ("Sands Venture GP LLC") is the general partner of Sands Venture GP L.P. Sands Venture GP L.P. and Sands Venture GP LLC each disclaim beneficial ownership of such securities except to the extent of their relative pecuniary interest therein.

F4: Frank M. Sands holds ultimate voting and investment power over securities held by Sands Discovery Fund, Sands Venture Fund and Sands Pulse Fund. Mr. Sands disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.