GROUP ONE TRADING LLC

Position in TMDX — TransMedics Group, Inc.

CIK 932540 CHICAGO, IL

Position in TMDX

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$632,783

+$2,922 QoQ

Shares Held

9,527

+50.4% QoQ

Ownership

0.027%

of shares outstanding

% of Portfolio

0.02%

of 13F equity value

Holder Rank

#159

of 368 holders

Holding Since

Mar 2021

12 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Healthcare · as of Jun 30, 2026

GROUP ONE TRADING LLC holds $20,255,911 across 37 Medical Devices names. TMDX ranks #7 (3.1% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	BSX	Boston Scientific Corp	154,900	$6,611,132
2	MDT	Medtronic plc	44,220	$3,459,330
3	ABT	Abbott Laboratories	37,819	$3,431,696
4	BFLY	Butterfly Network, Inc.	189,442	$1,595,101
5	AHCO	AdaptHealth Corp.	146,994	$1,531,677
6	DXCM	Dexcom Inc	11,059	$744,823
7	TMDX	TransMedics Group, Inc. This page	9,527	$632,783
8	GEHC	GE HealthCare Technologies Inc.	8,647	$553,494

12 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$632,783	9,527	+50.4%	Shares	Sole	2026-08-14
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.