Acumen Pharmaceuticals Inc. (ABOS)

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Sector: Biological Products, (No Disgnostic Substances)

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Hedge Fund Holdings

Filing Period:

Last updated on August 14, 2026, 5:16pm based on SEC 13F filings Last update: August 14, 2026, 5:16pm

No.	Hedge Fund	Shares	Value	Activity	% Port
1.	RA Capital Management Peter Kolchinsky	20,992,669	$56,050,426		0.49%
2.	Alyeska Investment Group Anand Parekh	2,454,754	$6,554,193		0.02%
3.	ADAR1 Capital Management Daniel Schneeberger	2,111,334	$5,637,262	-3%	0.26%
4.	Ikarian Capital Neil Shahrestani	1,053,797	$2,813,638		0.3%
5.	Hudson Bay Capital Management Sander Gerber	955,000	$2,549,850	-2%	0.01%

Insider Trading: Purchases See All

Insider	Price	Amount	Total Value	Remaining Holdings	Date	Form 4
Ra Large Shareholder, Director	$7.75	5,161,290	$39,999,997.50	13,043,179	2023-07-21	Filing
Stalfort Director	$16.00	35,000	$560,000.00	172,324	2021-07-06	Filing
Hardie Large Shareholder	$16.00	312,500	$5,000,000.00	3,352,693	2021-07-06	Filing
Hardie Large Shareholder	$16.00	750,000	$12,000,000.00	3,951,156	2021-07-06	Filing
Fountain Director	$16.00	6,250	$100,000.00	6,250	2021-07-06	Filing

Insider Trading: Sales See All

Insider	Price	Amount	Total Value	Remaining Holdings	Date	Form 4
Porter Director	$2.33	13,040	$30,318.00	35,500	2026-06-17	Filing
Porter Director	$2.33	12,800	$29,772.80	35,500	2026-06-16	Filing
Porter Director	$2.35	6,460	$15,148.70	48,300	2026-06-15	Filing
Fountain Director	$2.23	6,400	$14,272.64	48,150	2026-06-09	Filing
Meisner Officer	$3.26	2,090	$6,813.40	173,999	2026-03-06	Filing

Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Sands Capital Ventures, Llc	3,720,105	$9,932,680	1.62%
2.	Blackrock, Inc.	2,490,115	$6,648,607	0%
3.	Franklin Resources Inc	2,305,096	$6,154,606	0%
4.	Vanguard Capital Management Llc	1,672,072	$4,464,432	0%
5.	Knollwood Investment Advisory, Llc	1,628,510	$4,348,122	0.39%