Eric Siemers

CIK: 0001866239

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)6 (75.0%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)2 (25.0%)

Compensation grants

Other (G, F, J, C, D, …)0 (0.0%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

ABOS

Acumen Pharmaceuticals, Inc.

Officer

Discretionary Trading P&L

Holdings

Transaction History (8 total)

ABOS
Acumen Pharmaceuticals, Inc.
Jan 22, 2026
Sale(S)
Direct
895 shares at avg. $1.82$2K
ABOS
Acumen Pharmaceuticals, Inc.
Jan 21, 2026
Sale(S)
Direct
2.3K shares at avg. $1.80$4K
ABOS
Acumen Pharmaceuticals, Inc.
Jan 16, 2026
Award(A)
Direct
99.1K shares-
ABOS
Acumen Pharmaceuticals, Inc.
Jan 6, 2026
Sale(S)
Direct
6.8K shares at avg. $1.97$13K
ABOS
Acumen Pharmaceuticals, Inc.
Jan 5, 2026
Sale(S)
Direct
4K shares at avg. $1.96$8K
ABOS
Acumen Pharmaceuticals, Inc.
Jan 21, 2025
Sale(S)
Direct
3.2K shares at avg. $1.59$5K
ABOS
Acumen Pharmaceuticals, Inc.
Jan 6, 2025
Award(A)
Direct
66.8K shares-
ABOS
Acumen Pharmaceuticals, Inc.
Jan 3, 2025
Sale(S)
Direct
10.9K shares at avg. $1.85$20K

		Type	Shares	Price		Ownership
Jan 22, 2026	ABOS Acumen Pharmaceuticals, Inc.	Sale(S)	895	$1.82	$1,629	Direct
Jan 21, 2026	ABOS Acumen Pharmaceuticals, Inc.	Sale(S)	2,331	$1.80	$4,204	Direct
Jan 16, 2026	ABOS Acumen Pharmaceuticals, Inc.	Award(A)	99,133	-	$0	Direct
Jan 6, 2026	ABOS Acumen Pharmaceuticals, Inc.	Sale(S)	6,834	$1.97	$13,442	Direct
Jan 5, 2026	ABOS Acumen Pharmaceuticals, Inc.	Sale(S)	4,000	$1.96	$7,835	Direct
Jan 21, 2025	ABOS Acumen Pharmaceuticals, Inc.	Sale(S)	3,219	$1.59	$5,118	Direct
Jan 6, 2025	ABOS Acumen Pharmaceuticals, Inc.	Award(A)	66,800	-	$0	Direct
Jan 3, 2025	ABOS Acumen Pharmaceuticals, Inc.	Sale(S)	10,859	$1.85	$20,047	Direct

1-8 of 8 transactions

About Siemers Eric

Siemers Eric (SEC CIK 0001866239) files insider reports with the SEC as Chief Medical Officer of Acumen Pharmaceuticals, Inc. (ABOS).

Signal8 holds 5 ownership filings by Siemers Eric, all Form 4s, filed between Jan 7, 2025 and Jan 23, 2026. Those filings report 8 transactions, from Jan 3, 2025 to Jan 22, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Siemers Eric's filings is in NEWTON, MA.

Recent filings by Siemers Eric

Jan 22, 2026: Open-market sale of ABOS shares (Form 4, code S).
Jan 21, 2026: Open-market sale of ABOS shares (Form 4, code S).
Jan 16, 2026: Grant or award of ABOS shares (Form 4, code A).
Jan 6, 2026: Open-market sale of ABOS shares (Form 4, code S).
Jan 5, 2026: Open-market sale of ABOS shares (Form 4, code S).

Other insiders filing for Acumen Pharmaceuticals, Inc. (ABOS)

How to read Form 4 transaction codes