Idexx Laboratories Inc /De (IDXX) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

80,767,647Shares Outstanding

438,461Shares held by institutions

$274,551,124Value of institutional holdings

94.93%Institutional ownership %

12.57%Shares Changed QoQ

1,302No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Idexx Laboratories Inc /De (NASDAQ:IDXX) currently has 1302 active institutional owners and shareholders as of today (December 2025), that have filed 13F forms with the Securities Exchange Commission (SEC).

The percentage of Idexx Laboratories owned by institutions changed from 89.0% in September 2025 to 94.9% in December 2025, marking a slight up trend.
On a quarter-over-quarter basis, institutional holdings shifted by 12.57%, with a year-over-year an increase of 19.01% in the count of filers.
During the quarter, 627 institutions bought more Idexx Laboratories shares, 456 sold shares, and 219 of the 1302 total investors held their position steady.
The aggregate institutional position in Idexx Laboratories now stands at 76.68Mn shares as of December 2025, after investors increased their holdings (up by 8.56Mn shares quarter on quarter which is up 5.45Mn shares year over year).
As of December 31, 2025, VANGUARD GROUP INC held Idexx Laboratories's largest shareholding position with over 9.95Mn shares, representing 12.31% of total outstanding shares.
Among the most significant buyers of Idexx Laboratories during December 2025 were Elyxium Wealth, LLC (5.42Mn), J. Stern & Co. LLP (2.64Mn), WELLINGTON MANAGEMENT GROUP LLP (592.83K), NORGES BANK (491.13K), NOMURA ASSET MANAGEMENT INTERNATIONAL INC. (432.06K).
Leading sellers of Idexx Laboratories stock in December 2025 included Fundsmith LLP (734.42K), MACQUARIE GROUP LTD (509.78K), Bank of New York Mellon Corp (432.21K), PRINCIPAL FINANCIAL GROUP INC (346.78K), JPMORGAN CHASE & CO (196.70K).
The top 10 institutional holders of Idexx Laboratories for the quarter ending December 2025 included VANGUARD GROUP INC (9.95Mn), BlackRock, Inc. (8.53Mn), Elyxium Wealth, LLC (5.42Mn), STATE STREET CORP (3.66Mn), J. Stern & Co. LLP (2.65Mn), GEODE CAPITAL MANAGEMENT, LLC (2.58Mn), Fundsmith LLP (1.88Mn), BAMCO INC /NY/ (1.80Mn), Bank of New York Mellon Corp (1.62Mn), MORGAN STANLEY (1.55Mn).

1,302 Institutional Holders

438,461 Total Shares Held

Rows:

Download Data

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
STATE STREET CORP	31 Dec, 2025	3,656,626	138,956	3.95%	$2,473,817,188.00
J. Stern & Co. LLP	31 Dec, 2025	2,653,351	2,642,200	23,694.74%	$2,653,351.00
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
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
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
GOLDMAN SACHS GROUP INC	31 Dec, 2025	831,911	119,969	16.85%	$562,813,086.00
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	-196,702	-22.61%	$455,459,820.00
Legal & General Group Plc	31 Dec, 2025	670,614	-4,921	-0.73%	$453,690,487.00
AMERICAN CENTURY COMPANIES INC	31 Dec, 2025	628,934	-76,224	-10.81%	$425,492,719.00

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