GROUP ONE TRADING LLC

Position in NTRA — Natera, Inc.

CIK 932540 CHICAGO, IL

Position in NTRA

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

Position Value

$7,520,250

+$5,962,128 QoQ

Shares Held

27,704

+255.6% QoQ

Ownership

0.019%

of shares outstanding

% of Portfolio

0.26%

of 13F equity value

Holder Rank

#224

of 844 holders

Holding Since

Dec 2020

11 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Healthcare · as of Jun 30, 2026

GROUP ONE TRADING LLC holds $17,681,744 across 13 Diagnostics & Research names. NTRA ranks #1 (42.5% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	NTRA	Natera, Inc. This page	27,704	$7,520,250
2	DHR	Danaher Corp /De/	31,163	$5,935,928
3	ILMN	Illumina, Inc.	15,390	$2,706,023
4	CRL	Charles River Laboratories International, Inc.	1,573	$356,740
5	IQV	Iqvia Holdings Inc.	1,665	$321,711
6	TMO	Thermo Fisher Scientific Inc.	437	$219,094
7	GRAL	GRAIL, Inc.	2,326	$158,796
8	ICLR	Icon PLC	893	$155,123

11 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$7,520,250	27,704	+255.6%	Shares	Sole	2026-08-14
2026-03-31	$1,558,122	7,791	-34.7%	Shares	Sole	2026-05-13
2025-12-31	$2,732,127	11,926	+257.9%	Shares	Sole	2026-02-12
2025-06-30	$562,908	3,332	+501.4%	Shares	Sole	2025-08-14
2025-03-31	$78,341	554	-92.6%	Shares	Sole	2025-05-14
2023-12-31	$469,987	7,503	+84.0%	Shares	Sole	2024-02-14
2023-06-30	$198,386	4,077	-72.6%	Shares	Sole	2023-08-09
2022-09-30	$652,085	14,881	-59.2%	Shares	Sole	2022-11-09
2022-03-31	$1,484,820	36,500	+1912.1%	Shares	Sole	2022-05-12
2021-03-31	$184,193	1,814	+47.6%	Shares	Sole	2021-05-12
2020-12-31	$122,310	1,229	—	Shares	Sole	2021-02-10
No filing history on record for this holder in this stock.