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 February 13, 2026, 5:13pm based on SEC 13F filings Last update: February 13, 2026, 5:13pm

No.	Hedge Fund	Shares	Value	Activity	% Port
1.	Alyeska Investment Group Anand Parekh	939,603	$1,982,562		0.01%
2.	Laurion Capital Management Benjamin A. Smith	867,046	$1,829,467		0.07%
3.	Hudson Bay Capital Management Sander Gerber	725,000	$1,529,750	-1%	0.01%
4.	Renaissance Technologies Jim Simons	423,100	$892,741	-28%	0%
5.	Marshall Wace LLP Paul Marshall And Ian Wace	20,907	$44,114		0%

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
Meisner Officer	$3.00	2,671	$8,017.27	173,999	2026-01-28	Filing
Meisner Officer	$3.00	15,085	$45,262.54	173,999	2026-01-26	Filing
Meisner Officer	$1.90	5,633	$10,717.91	173,999	2026-01-23	Filing
Meisner Officer	$1.84	1,054	$1,939.36	179,632	2026-01-22	Filing
Meisner Officer	$1.81	2,247	$4,063.25	180,686	2026-01-21	Filing

Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Sands Capital Ventures, Llc	3,417,075	$7,210,028	1.39%
2.	Franklin Resources Inc	2,305,096	$4,863,753	0%
3.	Vanguard Group Inc	1,653,772	$3,489,459	0%
4.	Knollwood Investment Advisory, Llc	1,628,510	$3,436,156	0.32%
5.	Pathstone Holdings, Llc	859,110	$1,812,722	0.01%