Idexx Laboratories Inc /De (IDXX) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

80,675,000Shares Outstanding

84,450,363Shares held by institutions

$44,936,038,152Value of institutional holdings

104.68%Institutional ownership %

16.73%Shares Changed QoQ

1,347No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Idexx Laboratories Inc /De (NASDAQ:IDXX) showed up in the 13F filings of 1,341 institutional investors as of December 2025.

Their combined ownership stood at 103.3% of outstanding shares in December 2025, up from 91.3% in September 2025.
Their total shares held in IDXX increased 16.4% quarter over quarter, and separately, investors owning Idexx Laboratories increased 22.58% from a year ago.
Among the 1,341 funds, 650 bought more Idexx Laboratories shares, 472 sold down, and 219 held their ground.
Altogether, these fund groups held 83.38Mn shares in IDXX by December 2025, up by 11.75Mn shares quarter on quarter, and up 8.56Mn shares year over year.
As of December 31, 2025, the biggest holder of Idexx Laboratories is Pictet Asset Management Holding SA at 287.94K shares, representing 0.36% of shares outstanding.
The largest buyers of Idexx Laboratories for the quarter ending December 2025 were Pictet Asset Management Holding SA (115.7K), OP Asset Management Ltd (19.95K), CONGRESS ASSET MANAGEMENT CO (12.78K), Boston Trust Walden Corp (10.64K), Assenagon Asset Management S.A. (10.23K).
The largest sellers of Idexx Laboratories for the quarter ending December 2025 were BEACON INVESTMENT ADVISORY SERVICES, INC. (67.09K), SG Americas Securities, LLC (32.79K), AEGON ASSET MANAGEMENT UK PLC (23.77K), Seilern Investment Management Ltd (19.96K), Chicago Capital, LLC (8.0K).
Per Business Quant, the top 10 investors in IDXX for the quarter ending December 2025 include Pictet Asset Management Holding SA (287.94K), Robeco Institutional Asset Management B.V. (189.76K), CONGRESS ASSET MANAGEMENT CO (166.69K), LORING WOLCOTT & COOLIDGE FIDUCIARY ADVISORS LLP/MA (122.3K), Bank Pictet & Cie (Europe) AG (89.0K), Assenagon Asset Management S.A. (85.84K), MOGY JOEL R INVESTMENT COUNSEL INC (85.49K), RIVERBRIDGE PARTNERS LLC (82.52K), Seilern Investment Management Ltd (80.83K), Chicago Capital, LLC (77.38K).

1,359 Institutional Holders

84,450,363 Total Shares Held

Rows:

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Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
VANGUARD GROUP INC	31 Dec, 2025	9,945,328	-16,697	-0.17%	$6,728,312,752.00
BlackRock, Inc.	31 Dec, 2025	8,534,886	329,875	4.02%	$5,774,106,652.00
Elyxium Wealth, LLC	31 Dec, 2025	5,419,507	5,419,507	0.00%	$5,443,826.00
J. Stern & Co. LLP	31 Dec, 2025	5,306,702	5,295,551	47,489.47%	$5,306,702.00
State Street Corp	31 Dec, 2025	3,656,626	138,956	3.95%	$2,473,817,188.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	2,583,939	86,263	3.45%	$1,749,379,966.00
Fundsmith LLP	31 Dec, 2025	1,876,035	-734,422	-28.13%	$1,269,193,959.00
BAMCO INC /NY/	31 Dec, 2025	1,798,041	-86,088	-4.57%	$1,216,428,678.00
Goldman Sachs Group Inc	31 Dec, 2025	1,664,100	952,158	133.74%	$1,125,814,247.00
Bank of New York Mellon Corp	31 Dec, 2025	1,624,469	-432,211	-21.01%	$1,099,001,748.00
Morgan Stanley	31 Dec, 2025	1,553,731	-68,759	-4.24%	$1,051,147,718.00
Invesco Ltd.	31 Dec, 2025	1,502,218	181,955	13.78%	$1,016,295,593.00
NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO	31 Dec, 2025	1,446,901	1,444,630	63,612.07%	$41,940,195.00
BLAIR WILLIAM & CO/IL	31 Dec, 2025	1,001,375	-30,411	-2.95%	$677,459,976.00
Principal Financial Group Inc	31 Dec, 2025	968,946	-346,776	-26.36%	$655,561,672.00
POLEN CAPITAL MANAGEMENT LLC	31 Dec, 2025	960,537	-166,610	-14.78%	$649,831,919.00
Northern Trust Corp	31 Dec, 2025	923,152	-19,216	-2.04%	$624,540,025.00
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	31 Dec, 2025	859,887	-15,662	-1.79%	$581,739,353.00
WELLINGTON MANAGEMENT GROUP LLP	31 Dec, 2025	779,214	592,834	318.08%	$527,161,647.00
Jpmorgan Chase & Co	31 Dec, 2025	673,228	-1,066,632	-61.31%	$455,459,820.00

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