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$ABOS All transactions

Acumen Pharmaceuticals, Inc.

A

$ Value

$0

Shares

19,500

Price

$0

Filed

Jun 5

Insider

Name

RA CAPITAL MANAGEMENT, L.P.

Title

CIK

0001346824

Roles

Director 10% Owner

Transaction Details

Transaction Date

2025-06-04

Code

A

Table

Derivative

Ownership

Indirect

Equity Swap

No

Shares After

19,500

Footnotes

Represents the grant of a restricted stock unit ("RSU") award to Laura Stoppel pursuant to the Issuer's non-employee director compensation policy. Each RSU represents a contingent right to receive one share of the Issuer's Common Stock. The RSUs will vest in full on the earlier of June 4, 2026 or the Issuer's 2026 annual stockholder meeting, subject to Dr. Stoppel's continuous service as a director through such vesting date. | RA Capital Management, L.P. (the "Adviser") is the investment manager for 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 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. Each of the Adviser, the Adviser GP, the Fund, the Nexus Fund II, Dr. Kolchinsky, and Mr. Shah disclaim beneficial ownership of any of the reported securities, except to the extent of its or his respective pecuniary interest therein. | Under Dr. Stoppel's arrangement with the Adviser, Dr. Stoppel holds the RSU and the option for the benefit of the Fund and the Nexus Fund II. Dr. Stoppel is obligated to turn over to the Adviser any net cash or stock received upon exercise of the option or settlement of the RSU, as applicable, which will offset advisory fees owed by the Fund and the Nexus Fund II to the Adviser. The Reporting Persons therefore disclaim beneficial ownership of the RSU, the option and underlying common stock. | Held directly by the Fund. | Held directly by the Nexus Fund II. | Held directly by the Account. | Represents the grant of an option to Dr. Stoppel pursuant to the Issuer's non-employee director compensation policy. The shares subject to the option will vest on the earlier of June 4, 2026 or the 2026 annual stockholder meeting, subject to Dr. Stoppel's continuous service as a director through such vesting date.

Filing Info

Accession No.

0001415889-25-015836

Form Type

4

Issuer CIK

0001576885

RA CAPITAL MANAGEMENT, L.P.'s History

Date Ticker Type Value
2026-04-22 ACRV A $7.0M
2026-04-20 VOR $2.7M
2026-04-17 VOR $7.5M
2026-04-15 VOR $859K
2026-04-14 VOR $2.5M
2026-04-13 VOR $8.6M
2026-04-10 VOR $13K
2026-04-09 VOR $2.2M
2026-04-08 VOR $5.8M
2026-04-08 VOR $2.2M

Other Insiders at ABOS (90d)

Insider Bought Sold Last
RA CAPITAL MANAGEMENT, L.P. 2026-03-16
Meisner Derek M
Chief Legal Officer & Corp Sec
$88K 2026-03-06