GROUP ONE TRADING LLC

Position in FULC — Fulcrum Therapeutics, Inc.

CIK 932540 CHICAGO, IL

Position in FULC

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

Position Value

$412,308

+$19,286 QoQ

Shares Held

53,756

+54.7% QoQ

Ownership

0.081%

of shares outstanding

% of Portfolio

0.02%

of 13F equity value

Holder Rank

#71

of 168 holders

Holding Since

Sep 2021

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. FULC ranks #43 (0.3% 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	$412,308	53,756	+54.7%	Shares	Sole	2026-05-13
2025-12-31	$393,022	34,750	+503.3%	Shares	Sole	2026-02-12
2025-09-30	$52,992	5,760	+2.5%	Shares	Sole	2025-11-12
2025-06-30	$38,658	5,619	-17.3%	Shares	Sole	2025-08-14
2025-03-31	$19,560	6,792	-77.0%	Shares	Sole	2025-05-14
2024-12-31	$138,598	29,489	-57.4%	Shares	Sole	2025-05-14
2024-09-30	$247,044	69,200	+16.5%	Shares	Sole	2024-11-14
2024-06-30	$368,249	59,395	+184.8%	Shares	Sole	2024-08-14
2024-03-31	$196,852	20,853	+2.4%	Shares	Sole	2024-05-10
2023-12-31	$137,423	20,359	+200.6%	Shares	Sole	2024-02-14
2023-09-30	$30,072	6,773	+669.7%	Shares	Sole	2023-11-09
2022-09-30	$7,119	880	+867.0%	Shares	Sole	2022-11-09
2022-06-30	$445	91	-98.2%	Shares	Sole	2022-08-11
2021-09-30	$140,288	4,973	—	Shares	Sole	2021-11-12
No filing history on record for this holder in this stock.