GROUP ONE TRADING LLC

Position in TMDX — TransMedics Group, Inc.

CIK 932540 CHICAGO, IL

Position in TMDX

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

Position Value

$629,861

+$120,026 QoQ

Shares Held

6,336

+51.2% QoQ

Ownership

0.018%

of shares outstanding

% of Portfolio

0.02%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2021

11 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 $10,358,883 across 50 Medical Devices names. TMDX ranks #4 (6.1% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	BSX	Boston Scientific Corp	66,446	$4,169,486
2	INMD	InMode Ltd.	55,958	$765,505
3	ABT	Abbott Laboratories	6,555	$673,001
4	TMDX	TransMedics Group, Inc. This page	6,336	$629,861
5	GEHC	GE HealthCare Technologies Inc.	8,051	$573,070
6	NEOG	Neogen Corp	55,753	$517,945
7	PACB	Pacific Biosciences Of California, Inc.	365,021	$481,827
8	BFLY	Butterfly Network, Inc.	94,468	$381,650

11 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$629,861	6,336	+51.2%	Shares	Sole	2026-05-13
2025-12-31	$509,835	4,191	+120.7%	Shares	Sole	2026-02-12
2025-03-31	$127,764	1,899	-45.0%	Shares	Sole	2025-05-14
2024-12-31	$215,232	3,452	+38.5%	Shares	Sole	2025-05-14
2024-03-31	$184,258	2,492	-75.7%	Shares	Sole	2024-05-10
2023-09-30	$562,173	10,268	+376.0%	Shares	Sole	2023-11-09
2022-03-31	$58,109	2,157	-40.9%	Shares	Sole	2022-05-12
2021-12-31	$69,953	3,651	-12.0%	Shares	Sole	2022-02-11
2021-09-30	$137,224	4,147	+16.0%	Shares	Sole	2021-11-12
2021-06-30	$118,618	3,575	-53.3%	Shares	Sole	2021-08-10
2021-03-31	$317,937	7,663	—	Shares	Sole	2021-05-12
No filing history on record for this holder in this stock.