Idexx Laboratories IDXX Institutional Ownership

NASDAQ IDXX

$544.80 -8.64 (-1.56%)

As of: Aug 27, 2026 · 3:59 PM EDT

Institutions by Trading Activity

1,281 Institutions

Increased 584 45.6%

Unchanged 204 15.9%

Reduced 493 38.5%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

94.53%

▲+5.23 pp QoQ

Shares Held by Institutions

74.64Mn

of 78.95Mn outstanding

▲+6.24% QoQ

Shares Outstanding

78.95Mn

4.32Mn held outside 13F filers

Institutional Investors

1,281

filed 13F for Jun 2026

▼-18 vs prior quarter

Net Shares Added (QoQ)

+4.39Mn

accumulated since last quarter

Value of Holdings

$41.31Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Idexx Laboratories Inc /De (NASDAQ:IDXX) appears in 1,282 institutional 13F filings for the quarter ending March 2026.

Their combined ownership stood at 89.2% of outstanding shares in March 2026, down from 105.0% in December 2025.
Their total shares held in IDXX decreased -2.9% quarter over quarter, and separately, investors owning Idexx Laboratories increased 13.75% from a year ago.
During the quarter, 554 of these 1,282 funds increased positions in IDXX, 497 reduced exposure, and 231 held steady.
Combined, these investors held 71.02Mn shares in IDXX for March 2026, down by 2.12Mn shares quarter on quarter, and down 7.22Mn shares year over year.
BlackRock, Inc. is the top holder of Idexx Laboratories as of March 31, 2026, with 8.37Mn shares representing 10.5% of outstanding stock.
The largest buyers of Idexx Laboratories for the quarter ending March 2026 were VANGUARD CAPITAL MANAGEMENT LLC (5.18Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (3.91Mn), PRICE T ROWE ASSOCIATES INC /MD/ (638.06K), Capital World Investors (497.85K), VANGUARD FIDUCIARY TRUST CO (460.66K).
Top sellers of IDXX stock for the quarter ending March 2026 included Elyxium Wealth, LLC (5.41Mn), J. Stern & Co. LLP (5.3Mn), NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO (1.44Mn), Goldman Sachs Group Inc (947.18K), Fundsmith LLP (410.25K).
Idexx Laboratories's 10 largest shareholders as of March 2026 include BlackRock, Inc. (8.37Mn), VANGUARD CAPITAL MANAGEMENT LLC (5.18Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (3.91Mn), State Street Corp (3.67Mn), GEODE CAPITAL MANAGEMENT, LLC (2.66Mn), Invesco Ltd. (1.68Mn), BAMCO INC /NY/ (1.63Mn), Bank of New York Mellon Corp (1.5Mn), Fundsmith LLP (1.47Mn), Morgan Stanley (1.32Mn) per Business Quant data.

Form 13F Holdings

1,281 Institutional Holders

Report period 30 Jun, 2026

Total shares held 74.64Mn

Of outstanding 94.53%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	8,170,178	10.35%	▼195,375	-2.34%	$4.30Bn
2	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	5,152,213	6.53%	▼30,294	-0.58%	$2.71Bn
3	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	3,896,521	4.94%	▼14,342	-0.37%	$2.05Bn
4	State Street Corp	0000093751	3,748,660	4.75%	▲74,475	+2.03%	$1.97Bn
5	Invesco Ltd.	0000914208	3,611,416	4.57%	▲1,933,371	+115.22%	$1.90Bn
6	GEODE CAPITAL MANAGEMENT, LLC	0001214717	2,562,886	3.25%	▼98,113	-3.69%	$1.35Bn
7	BAMCO INC /NY/	0001017918	1,976,778	2.50%	▲343,411	+21.02%	$1.04Bn
8	Morgan Stanley	0000895421	1,356,103	1.72%	▲40,149	+3.05%	$713.91Mn
9	Bank of New York Mellon Corp	0001390777	1,193,343	1.51%	▼311,189	-20.68%	$628.22Mn
10	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	0001164508	1,067,078	1.35%	▲228,239	+27.21%	$561.75Mn
11	Fundsmith LLP	0001569205	1,019,887	1.29%	▼445,899	-30.42%	$536.91Mn
12	BLAIR WILLIAM & CO/IL	0000902367	918,556	1.16%	▼27,780	-2.94%	$483.56Mn
13	Northern Trust Corp	0000073124	918,137	1.16%	▲6,244	+0.68%	$483.34Mn
14	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	0000861177	911,489	1.15%	▲39,700	+4.55%	$479.84Mn
15	FMR LLC	0000315066	822,643	1.04%	▲539,667	+190.71%	$433.07Mn
16	AMERICAN CENTURY COMPANIES INC	0000748054	808,358	1.02%	▲208,427	+34.74%	$425.55Mn
17	Capital Research Global Investors	0001422848	789,111	1.00%	▲7,766	+0.99%	$415.47Mn
18	Jpmorgan Chase & Co	0000019617	755,791	0.96%	▼24,091	-3.09%	$405.05Mn
19	Principal Financial Group Inc	0001126328	743,246	0.94%	▼137,943	-15.65%	$391.30Mn
20	Goldman Sachs Group Inc	0000886982	738,708	0.94%	▲21,787	+3.04%	$388.89Mn

Showing 1 to 20 of 1,281 holders