Rafferty Asset Management, LLC

Position in IDXX — Idexx Laboratories Inc /De

CIK 1389426 New York, NY

Position in IDXX

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$14,552,389

-$3,113,162 QoQ

Shares Held

25,899

-0.8% QoQ

Ownership

0.033%

of shares outstanding

% of Portfolio

0.08%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

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

Healthcare · as of Mar 31, 2026

Rafferty Asset Management, LLC holds $69,634,221 across 18 Diagnostics & Research names. IDXX ranks #1 (20.9% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	IDXX	Idexx Laboratories Inc /De This page	25,899	$14,552,389
2	TMO	Thermo Fisher Scientific Inc.	29,028	$14,268,132
3	DHR	Danaher Corp /De/	48,612	$9,216,835
4	NTRA	Natera, Inc.	22,942	$4,588,170
5	TWST	Twist Bioscience Corp	96,255	$4,574,037
6	VCYT	Veracyte, Inc.	104,212	$3,356,668
7	GRAL	GRAIL, Inc.	55,423	$2,864,260
8	A	Agilent Technologies, Inc.	21,858	$2,491,374

25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$14,552,389	25,899	-0.8%	Shares	Sole	2026-05-15
2025-12-31	$17,665,551	26,112	-5.2%	Shares	Sole	2026-02-13
2025-09-30	$17,595,669	27,541	-11.1%	Shares	Sole	2025-11-12
2025-06-30	$16,617,958	30,984	-17.9%	Shares	Sole	2025-08-14
2025-03-31	$15,850,592	37,744	-7.7%	Shares	Sole	2025-05-14
2024-12-31	$16,909,696	40,900	+27.7%	Shares	Sole	2025-02-14
2024-09-30	$16,182,196	32,030	-7.8%	Shares	Sole	2024-11-13
2024-06-30	$16,920,456	34,730	+5.9%	Shares	Sole	2024-08-13
2024-03-31	$17,698,905	32,780	+11.7%	Shares	Sole	2024-05-13
2023-12-31	$16,294,602	29,357	+4.3%	Shares	Sole	2024-02-13
2023-09-30	$12,305,652	28,142	+20.1%	Shares	Sole	2023-11-13
2023-06-30	$11,772,271	23,440	+21.1%	Shares	Sole	2023-08-11
2023-03-31	$9,680,048	19,357	+7.3%	Shares	Sole	2023-05-11
2022-12-31	$7,359,598	18,040	-25.2%	Shares	Sole	2023-02-13
2022-09-30	$7,852,431	24,102	+11.0%	Shares	Sole	2022-11-14
2022-06-30	$7,615,751	21,714	+38.2%	Shares	Sole	2022-08-12
2022-03-31	$8,597,047	15,715	+64.9%	Shares	Sole	2022-05-13
2021-12-31	$6,275,123	9,530	+5.0%	Shares	Sole	2022-02-10
2021-09-30	$5,645,608	9,078	+11.1%	Shares	Sole	2021-11-10
2021-06-30	$5,161,658	8,173	-11.6%	Shares	Sole	2021-08-10
2021-03-31	$4,522,203	9,242	-2.4%	Shares	Sole	2021-05-10
2020-12-31	$4,731,269	9,465	-1.6%	Shares	Sole	2021-02-10
2020-09-30	$3,781,718	9,620	-13.1%	Shares	Sole	2020-11-13
2020-06-30	$3,655,201	11,071	-53.2%	Shares	Sole	2020-08-07
2020-03-31	$5,735,516	23,677	—	Shares	Sole	2020-05-15
No filing history on record for this holder in this stock.