STATE OF WISCONSIN INVESTMENT BOARD

Position in IDXX — Idexx Laboratories Inc /De

CIK 854157 MADISON, WI

Position in IDXX

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

Position Value

$28,868,784

-$6,108,493 QoQ

Shares Held

51,378

-0.6% QoQ

Ownership

0.065%

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

STATE OF WISCONSIN INVESTMENT BOARD holds $358,537,463 across 25 Diagnostics & Research names. IDXX ranks #3 (8.1% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	TMO	Thermo Fisher Scientific Inc.	205,695	$101,105,263
2	DHR	Danaher Corp /De/	341,842	$64,813,243
3	IDXX	Idexx Laboratories Inc /De This page	51,378	$28,868,784
4	A	Agilent Technologies, Inc.	151,816	$17,303,987
5	WAT	Waters Corp /De/	52,777	$15,716,990
6	IQV	Iqvia Holdings Inc.	91,193	$15,552,054
7	DGX	Quest Diagnostics Inc	73,355	$14,376,112
8	MTD	Mettler Toledo International Inc/	11,239	$14,174,626

25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$28,868,784	51,378	-0.6%	Shares	Sole	2026-05-15
2025-12-31	$34,977,277	51,701	+0.0%	Shares	Sole	2026-02-17
2025-09-30	$33,022,307	51,687	+6.9%	Shares	Sole	2025-11-14
2025-06-30	$25,942,229	48,369	-17.4%	Shares	Sole	2025-08-14
2025-03-31	$24,580,933	58,533	+10.3%	Shares	Sole	2025-05-15
2024-12-31	$21,946,222	53,082	-14.3%	Shares	Sole	2025-02-14
2024-09-30	$31,305,452	61,964	-1.1%	Shares	Sole	2024-11-14
2024-06-30	$30,518,208	62,640	-4.8%	Shares	Sole	2024-08-14
2024-03-31	$35,513,895	65,775	+1.1%	Shares	Sole	2024-05-14
2023-12-31	$36,095,456	65,031	-8.6%	Shares	Sole	2024-02-12
2023-09-30	$31,114,384	71,156	+23.9%	Shares	Sole	2023-11-14
2023-06-30	$28,848,593	57,441	+8.6%	Shares	Sole	2023-08-14
2023-03-31	$26,457,232	52,906	+18.2%	Shares	Sole	2023-05-15
2022-12-31	$18,254,578	44,746	-20.3%	Shares	Sole	2023-02-14
2022-09-30	$18,298,231	56,164	-16.4%	Shares	Sole	2022-11-14
2022-06-30	$23,564,145	67,186	+4.4%	Shares	Sole	2022-08-15
2022-03-31	$35,204,952	64,353	+19.2%	Shares	Sole	2022-05-13
2021-12-31	$35,539,061	53,973	-21.0%	Shares	Sole	2022-02-11
2021-09-30	$42,463,332	68,280	+5.2%	Shares	Sole	2021-11-12
2021-06-30	$40,986,963	64,899	-4.7%	Shares	Sole	2021-08-12
2021-03-31	$33,308,310	68,072	+32.8%	Shares	Sole	2021-05-17
2020-12-31	$25,622,336	51,258	+12.0%	Shares	Sole	2021-02-03
2020-09-30	$17,995,789	45,778	-28.4%	Shares	Sole	2020-11-16
2020-06-30	$21,105,147	63,924	+53.9%	Shares	Sole	2020-08-12
2020-03-31	$10,058,773	41,524	—	Shares	Sole	2020-05-06
No filing history on record for this holder in this stock.