Stocks
ABOS Acumen Pharmaceuticals, Inc.

ABOS

Acumen Pharmaceuticals, Inc.

Company with tickers: ABOS

CIK

1576885

CUSIP

00509G209

Shares Outstanding

72,227,580

13F Activity (30d)

76 filings 76 filers

Date	Insider	Role	Type	Shares	Price	Value	After
2026-03-16	RA CAPITAL MANAGEMENT, L.P.	Director	Other	588,850	—	—	588,850
2026-03-16	RA CAPITAL MANAGEMENT, L.P.	Director	Other	1,300,034	—	—	1,300,034
2026-03-16	RA CAPITAL MANAGEMENT, L.P.	Director	Award	6,060,606	$3.30	$20,000,000	19,103,785
2026-03-06	Meisner Derek M	Chief Legal Officer & Corp Sec	Convert	2,090	—	—	71,048
2026-03-06	Meisner Derek M	Chief Legal Officer & Corp Sec	Convert	2,090	$1.85	$3,867	176,089
2026-03-06	Meisner Derek M	Chief Legal Officer & Corp Sec	Sell	2,090	$3.26	$6,813	173,999
2026-02-27	Meisner Derek M	Chief Legal Officer & Corp Sec	Sell	9,406	$3.01	$28,311	173,999
2026-02-27	Meisner Derek M	Chief Legal Officer & Corp Sec	Convert	9,406	$1.85	$17,401	183,405
2026-02-27	Meisner Derek M	Chief Legal Officer & Corp Sec	Convert	9,406	—	—	73,138
2026-01-28	Meisner Derek M	Chief Legal Officer & Corp Sec	Convert	2,671	—	—	82,544
2026-01-28	Meisner Derek M	Chief Legal Officer & Corp Sec	Convert	2,671	$1.85	$4,941	176,670
2026-01-28	Meisner Derek M	Chief Legal Officer & Corp Sec	Sell	2,671	$3.00	$8,017	173,999
2026-01-26	Meisner Derek M	Chief Legal Officer & Corp Sec	Sell	15,085	$3.00	$45,263	173,999
2026-01-26	Meisner Derek M	Chief Legal Officer & Corp Sec	Convert	15,085	$1.85	$27,907	189,084
2026-01-26	Meisner Derek M	Chief Legal Officer & Corp Sec	Convert	15,085	—	—	85,215
2026-01-23	Meisner Derek M	Chief Legal Officer & Corp Sec	Sell	5,633	$1.90	$10,718	173,999
2026-01-22	Meisner Derek M	Chief Legal Officer & Corp Sec	Sell	1,054	$1.84	$1,939	179,632
2026-01-22	Siemers Eric	Chief Medical Officer	Sell	895	$1.82	$1,629	255,371
2026-01-22	Barton Russell	Chief Operating Officer	Sell	462	$1.84	$850	205,092
2026-01-22	Zuga Matt	Director, 10% Owner	Sell	1,687	$1.86	$3,138	304,924
2026-01-22	OConnell Daniel Joseph	Director, Chief Executive Officer	Sell	2,689	$1.88	$5,066	881,275
2026-01-21	Zuga Matt	Director, 10% Owner	Sell	2,473	$1.81	$4,469	306,611
2026-01-21	Meisner Derek M	Chief Legal Officer & Corp Sec	Sell	2,247	$1.81	$4,063	180,686
2026-01-21	Siemers Eric	Chief Medical Officer	Sell	2,331	$1.80	$4,204	256,266
2026-01-21	Barton Russell	Chief Operating Officer	Sell	2,315	$1.81	$4,181	205,554
2026-01-21	OConnell Daniel Joseph	Director, Chief Executive Officer	Sell	9,346	$1.81	$16,927	883,964
2026-01-20	OConnell Daniel Joseph	Director, Chief Executive Officer	Award	299,800	—	—	893,310
2026-01-20	OConnell Daniel Joseph	Director, Chief Executive Officer	Award	450,000	—	—	450,000
2026-01-16	Zuga Matt	Director, 10% Owner	Award	99,133	—	—	309,084
2026-01-16	Zuga Matt	Director, 10% Owner	Award	148,700	—	—	148,700
2026-01-16	Meisner Derek M	Chief Legal Officer & Corp Sec	Award	99,133	—	—	182,933
2026-01-16	Meisner Derek M	Chief Legal Officer & Corp Sec	Award	148,700	—	—	148,700
2026-01-16	Siemers Eric	Chief Medical Officer	Award	99,133	—	—	258,597
2026-01-16	Siemers Eric	Chief Medical Officer	Award	148,700	—	—	148,700
2026-01-16	Barton Russell	Chief Operating Officer	Award	84,600	—	—	207,869
2026-01-16	Barton Russell	Chief Operating Officer	Award	126,900	—	—	126,900
2026-01-16	Schacterle Amy	Chief Regulatory Officer	Award	126,900	—	—	126,900
2026-01-16	Schacterle Amy	Chief Regulatory Officer	Award	84,600	—	—	92,303
2026-01-16	Doherty James J.	President and CDO	Award	166,867	—	—	220,900
2026-01-16	Doherty James J.	President and CDO	Award	250,300	—	—	250,300
2026-01-12	Meisner Derek M	Chief Legal Officer & Corp Sec	Sell	8,548	$1.71	$14,658	83,800
2026-01-12	OConnell Daniel Joseph	Director, Chief Executive Officer	Sell	5,388	$1.73	$9,307	593,510
2026-01-09	Meisner Derek M	Chief Legal Officer & Corp Sec	Sell	5,200	$1.76	$9,169	92,348
2026-01-09	OConnell Daniel Joseph	Director, Chief Executive Officer	Sell	12,941	$1.76	$22,832	598,898
2026-01-08	Doherty James J.	President and CDO	Sell	6,467	$1.82	$11,769	54,033
2026-01-08	Zuga Matt	Director, 10% Owner	Sell	6,888	$1.82	$12,513	209,951
2026-01-08	Barton Russell	Chief Operating Officer	Sell	3,530	$1.86	$6,562	123,269
2026-01-08	Meisner Derek M	Chief Legal Officer & Corp Sec	Sell	30,092	$1.82	$54,867	97,548
2026-01-08	Meisner Derek M	Chief Legal Officer & Corp Sec	Sell	6,819	$1.82	$12,379	127,640
2026-01-08	OConnell Daniel Joseph	Director, Chief Executive Officer	Sell	8,143	$1.82	$14,815	611,839
2026-01-07	Doherty James J.	President and CDO	Sell	1,700	$1.99	$3,379	60,500
2026-01-07	Meisner Derek M	Chief Legal Officer & Corp Sec	Sell	1,700	$1.99	$3,379	144,529
2026-01-07	Meisner Derek M	Chief Legal Officer & Corp Sec	Sell	10,070	$1.99	$20,035	134,459
2026-01-07	Barton Russell	Chief Operating Officer	Sell	1,700	$1.99	$3,378	126,799
2026-01-07	Schacterle Amy	Chief Regulatory Officer	Sell	1,097	$1.98	$2,176	7,703
2026-01-07	Zuga Matt	Director, 10% Owner	Sell	4,105	$2.00	$8,189	218,539
2026-01-07	Zuga Matt	Director, 10% Owner	Sell	1,700	$1.99	$3,377	216,839
2026-01-07	OConnell Daniel Joseph	Director, Chief Executive Officer	Sell	37,755	$1.99	$74,981	619,982
2026-01-06	Meisner Derek M	Chief Legal Officer & Corp Sec	Sell	7,097	$1.97	$13,961	150,030
2026-01-06	Meisner Derek M	Chief Legal Officer & Corp Sec	Sell	3,801	$1.97	$7,477	146,229
2026-01-06	Barton Russell	Chief Operating Officer	Sell	3,618	$1.97	$7,114	128,499
2026-01-06	Zuga Matt	Director, 10% Owner	Sell	5,100	$1.97	$10,028	222,644
2026-01-06	Siemers Eric	Chief Medical Officer	Sell	6,834	$1.97	$13,442	159,464
2026-01-06	OConnell Daniel Joseph	Director, Chief Executive Officer	Sell	5,102	$1.97	$10,032	657,737
2026-01-05	Meisner Derek M	Chief Legal Officer & Corp Sec	Sell	4,000	$1.96	$7,838	157,127
2026-01-05	Zuga Matt	Director, 10% Owner	Sell	4,000	$1.96	$7,842	227,744
2026-01-05	Siemers Eric	Chief Medical Officer	Sell	4,000	$1.96	$7,835	166,298
2026-01-05	OConnell Daniel Joseph	Director, Chief Executive Officer	Sell	4,649	$1.97	$9,163	662,839
2026-01-05	Barton Russell	Chief Operating Officer	Sell	4,000	$1.96	$7,832	132,117
2025-11-06	Golumbeski George	Director	Award	50,000	—	—	50,000
2025-11-06	Golumbeski George	Director	Other	0	—	—	0
2025-06-04	RA CAPITAL MANAGEMENT, L.P.	Director	Award	12,800	—	—	12,800
2025-06-04	RA CAPITAL MANAGEMENT, L.P.	Director	Other	1,300,034	—	—	1,300,034
2025-06-04	RA CAPITAL MANAGEMENT, L.P.	Director	Other	13,043,179	—	—	13,043,179
2025-06-04	RA CAPITAL MANAGEMENT, L.P.	Director	Award	19,500	—	—	19,500
2025-06-04	RA CAPITAL MANAGEMENT, L.P.	Director	Other	588,850	—	—	588,850
2025-06-04	Drapkin Kimberlee C	Director	Award	19,500	—	—	19,500
2025-06-04	Drapkin Kimberlee C	Director	Award	12,800	—	—	12,800
2025-06-04	Ives Jeffrey L.	Director	Award	12,800	—	—	12,800
2025-06-04	Ives Jeffrey L.	Director	Award	19,500	—	—	19,500
2025-06-04	Porter Derrell	Director	Award	12,800	—	—	12,800
2025-06-04	Porter Derrell	Director	Award	19,500	—	—	19,500
2025-06-04	Stoppel Laura	Director	Award	19,500	—	—	19,500
2025-06-04	Stoppel Laura	Director	Award	12,800	—	—	12,800
2025-06-04	Stalfort John A III	Director	Award	12,800	—	—	185,124
2025-06-04	Stalfort John A III	Director	Award	19,500	—	—	19,500
2025-06-04	Fountain Nathan B	Director	Award	19,500	—	—	19,500
2025-06-04	Fountain Nathan B	Director	Award	12,800	—	—	19,050
2025-01-23	Zuga Matt	Director, 10% Owner	Sell	28,902	$1.72	$49,633	231,744
2025-01-21	Zuga Matt	Director, 10% Owner	Sell	4,364	$1.60	$6,986	260,646
2025-01-21	Barton Russell	Chief Operating Officer	Sell	2,914	$1.61	$4,692	136,117
2025-01-21	Siemers Eric	Chief Medical Officer	Sell	3,219	$1.59	$5,118	170,298
2025-01-21	OConnell Daniel Joseph	Director, Chief Executive Officer	Sell	12,619	$1.59	$20,102	667,488
2025-01-21	Meisner Derek M	Chief Legal Officer & Corp Sec	Sell	3,418	$1.59	$5,435	161,127
2025-01-07	OConnell Daniel Joseph	Director, Chief Executive Officer	Award	225,400	—	—	680,107
2025-01-07	OConnell Daniel Joseph	Director, Chief Executive Officer	Award	338,000	—	—	338,000
2025-01-06	Barton Russell	Chief Operating Officer	Award	49,800	—	—	139,031
2025-01-06	Barton Russell	Chief Operating Officer	Award	74,700	—	—	74,700
2025-01-06	Meisner Derek M	Chief Legal Officer & Corp Sec	Award	66,800	—	—	164,545
2025-01-06	Meisner Derek M	Chief Legal Officer & Corp Sec	Award	100,300	—	—	100,300