GROUP ONE TRADING LLC

Position in ABOS — Acumen Pharmaceuticals, Inc.

CIK 932540 CHICAGO, IL

Position in ABOS

as of Mar 31, 2026 · filed May 13, 2026 Compact

Position Value

$3,481

-$6,545 QoQ

Shares Held

1,475

-69.0% QoQ

Ownership

0.002%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

#69

of 84 holders

Holding Since

Sep 2022

14 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Healthcare · as of Mar 31, 2026

GROUP ONE TRADING LLC holds $126,503,470 across 207 Biotechnology names. ABOS ranks #160 (0.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	CYTK	Cytokinetics Inc	363,997	$23,991,042
2	BNTX	BioNTech SE	103,948	$9,238,898
3	VKTX	Viking Therapeutics, Inc.	211,817	$6,892,525
4	AGIO	Agios Pharmaceuticals, Inc.	173,279	$5,862,028
5	CRSP	CRISPR Therapeutics AG	96,001	$4,566,767
6	VRTX	Vertex Pharmaceuticals Inc / Ma	9,357	$4,178,274
7	REGN	Regeneron Pharmaceuticals, Inc.	5,399	$4,171,483
8	ABVX	Abivax S.A.	35,767	$3,982,655

14 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$3,481	1,475	-69.0%	Shares	Sole	2026-05-13
2025-12-31	$10,026	4,752	-39.1%	Shares	Sole	2026-02-12
2025-09-30	$13,334	7,798	-8.5%	Shares	Sole	2025-11-12
2025-06-30	$9,887	8,524	+253.5%	Shares	Sole	2025-08-14
2025-03-31	$2,652	2,411	-91.6%	Shares	Sole	2025-05-14
2024-12-31	$49,618	28,848	-76.5%	Shares	Sole	2025-05-14
2024-09-30	$304,020	122,589	-1.9%	Shares	Sole	2024-11-14
2024-06-30	$302,558	125,024	+345.9%	Shares	Sole	2024-08-14
2024-03-31	$113,549	28,037	+271.7%	Shares	Sole	2024-05-10
2023-12-31	$28,965	7,543	-77.0%	Shares	Sole	2024-02-14
2023-06-30	$157,768	32,800	+662.8%	Shares	Sole	2023-08-09
2023-03-31	$17,458	4,300	-68.2%	Shares	Sole	2023-05-12
2022-12-31	$72,948	13,509	+4.9%	Shares	Sole	2023-02-09
2022-09-30	$129,186	12,880	—	Shares	Sole	2022-11-09
No filing history on record for this holder in this stock.