GROUP ONE TRADING LLC

Position in SBLK — Star Bulk Carriers Corp.

CIK 932540 CHICAGO, IL

Position in SBLK

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

Position Value

$586,332

-$3,679,989 QoQ

Shares Held

25,526

-88.5% QoQ

Ownership

0.023%

of shares outstanding

% of Portfolio

0.02%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Sep 2020

14 quarters on record

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

Industrials · as of Mar 31, 2026

GROUP ONE TRADING LLC holds $16,897,142 across 10 Marine Shipping names. SBLK ranks #3 (3.5% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ZIM	ZIM Integrated Shipping Services Ltd.	406,472	$10,710,537
2	NMM	Navios Maritime Partners L.P.	71,481	$4,823,537
3	SBLK	Star Bulk Carriers Corp. This page	25,526	$586,332
4	GASS	StealthGas Inc.	26,845	$246,437
5	SFL	SFL Corp Ltd.	15,890	$171,453
6	GSL	Global Ship Lease, Inc.	3,539	$131,756
7	PANL	Pangaea Logistics Solutions Ltd.	14,392	$101,895
8	DSX	Diana Shipping Inc.	32,601	$81,502

14 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$586,332	25,526	-88.5%	Shares	Sole	2026-05-13
2025-12-31	$4,266,321	221,973	+21.8%	Shares	Sole	2026-02-12
2025-09-30	$3,387,098	182,200	+79.2%	Shares	Sole	2025-11-12
2025-06-30	$1,754,204	101,693	-45.1%	Shares	Sole	2025-08-14
2025-03-31	$2,882,054	185,222	+198.6%	Shares	Sole	2025-05-14
2024-12-31	$927,393	62,033	+6709.3%	Shares	Sole	2025-05-14
2024-09-30	$21,581	911	-97.9%	Shares	Sole	2024-11-14
2024-03-31	$1,038,750	43,517	+160.7%	Shares	Sole	2024-05-10
2023-12-31	$354,829	16,690	-48.6%	Shares	Sole	2024-02-14
2023-09-30	$625,809	32,459	+32.5%	Shares	Sole	2023-11-09
2023-06-30	$433,720	24,504	-69.1%	Shares	Sole	2023-08-09
2021-03-31	$1,165,680	79,406	+881.7%	Shares	Sole	2021-05-12
2020-12-31	$71,425	8,089	-58.9%	Shares	Sole	2021-02-10
2020-09-30	$135,484	19,664	—	Shares	Sole	2020-11-12
No filing history on record for this holder in this stock.