SIMPLEX TRADING, LLC

Position in CRL — Charles River Laboratories International, Inc.

CIK 1488542 CHICAGO, IL

Position in CRL

as of Jun 30, 2026 · filed Aug 12, 2026 Compact

Position Value

$4,353,460

+$3,635,133 QoQ

Shares Held

19,196

+433.1% QoQ

Ownership

0.040%

of shares outstanding

% of Portfolio

0.14%

of 13F equity value

Holder Rank

#138

of 558 holders

Holding Since

Mar 2021

12 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Healthcare · as of Jun 30, 2026

SIMPLEX TRADING, LLC holds $17,754,789 across 23 Diagnostics & Research names. CRL ranks #1 (24.5% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	CRL	Charles River Laboratories International, Inc. This page	19,196	$4,353,460
2	NTRA	Natera, Inc.	14,519	$3,941,182
3	IQV	Iqvia Holdings Inc.	10,126	$1,956,545
4	MTD	Mettler Toledo International Inc/	1,327	$1,695,255
5	TMO	Thermo Fisher Scientific Inc.	2,213	$1,109,509
6	QGEN	Qiagen N.V.	26,002	$1,016,678
7	TWST	Twist Bioscience Corp	8,078	$831,064
8	NEO	Neogenomics Inc	54,589	$796,453

12 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$4,353,460	19,196	+433.1%	Shares	Sole	2026-08-12
2025-12-31	$718,327	3,601	+814.0%	Shares	Sole	2026-02-11
2025-03-31	$59,304	394	-80.5%	Shares	Sole	2025-05-12
2024-12-31	$372,707	2,019	-36.3%	Shares	Sole	2025-02-11
2024-09-30	$624,197	3,169	+6.7%	Shares	Sole	2024-11-08
2024-03-31	$804,721	2,970	+37.4%	Shares	Sole	2024-04-25
2023-12-31	$511,096	2,162	-13.1%	Shares	Sole	2024-02-02
2023-06-30	$522,891	2,487	+140.3%	Shares	Sole	2023-08-04
2022-12-31	$225,526	1,035	+15.5%	Shares	Sole	2023-02-02
2022-09-30	$176,332	896	-86.7%	Shares	Sole	2022-11-04
2021-12-31	$2,539,497	6,740	+481.0%	Shares	Sole	2022-02-23
2021-03-31	$336,202	1,160	—	Shares	Sole	2021-04-26
No filing history on record for this holder in this stock.