Stock Ownership/IDXX

IDEXX LABS INC (IDXX): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in IDXX · Health Care. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
33
13F filers
Aggregate Value
$2.5B
Across holders
Last Price
$559.51
2026-08-24
Sector
Health Care
GICS
Quarterly fund activity23 increased10 reduced7 exited
Full exits: Fisher Asset Management, LLC, Verition Fund Management LLC, Grantham, Mayo, Van Otterloo & Co. LLC, TUDOR INVESTMENT CORP ET AL, Select Equity Group, L.P., SHAW D E & CO INC, Walleye Capital LLC
Institutional Holders of IDXX
↗
33 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 0001164508
Hedge Fund1.07M$561.8M22.7%0.2%Added+$120.2MQ2 2026
Fundsmith LLP
CIK 0001569205
Institutional Manager1.02M$536.9M21.7%3.9%Reduced$-234.7MQ2 2026
Clearbridge Investments, LLC
CIK 0001348883
Hedge Fund380K$199.8M8.1%0.2%Added+$37.4MQ2 2026
BAILLIE GIFFORD & CO
CIK 0001088875
Institutional Manager354K$186.3M7.5%0.2%Added—Q2 2026
Squarepoint Ops LLC
CIK 0001642575
Hedge Fund315K$165.9M6.7%0.2%Added+$113.1MQ2 2026
Point72 Asset Management, L.P.
CIK 0001603466
Hedge Fund263K$138.4M5.6%0.2%Added+$70.3MQ2 2026
Holocene Advisors, LP
CIK 0001700574
Hedge Fund176K$92.4M3.7%0.2%Added+$14.7MQ2 2026
Qube Research & Technologies Ltd
CIK 0001729829
Hedge Fund148K$78.1M3.2%0.1%Added+$33.0MQ2 2026
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
Hedge Fund110K$57.8M2.3%0.1%Added+$32.3MQ2 2026
TCW GROUP INC
CIK 0000850401
Hedge Fund109K$57.4M2.3%0.4%Reduced+$42.4MQ2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPAdded
Hedge Fund
$561.8M· 22.7% of total· 0.2% port· 1.07M sh· +$120.2M QoQ· Q2 2026
Fundsmith LLPReduced
Institutional Manager
$536.9M· 21.7% of total· 3.9% port· 1.02M sh· $-234.7M QoQ· Q2 2026
Clearbridge Investments, LLCAdded
Hedge Fund
$199.8M· 8.1% of total· 0.2% port· 380K sh· +$37.4M QoQ· Q2 2026
BAILLIE GIFFORD & COAdded
Institutional Manager
$186.3M· 7.5% of total· 0.2% port· 354K sh· — QoQ· Q2 2026
Squarepoint Ops LLCAdded
Hedge Fund
$165.9M· 6.7% of total· 0.2% port· 315K sh· +$113.1M QoQ· Q2 2026
Point72 Asset Management, L.P.Added
Hedge Fund
$138.4M· 5.6% of total· 0.2% port· 263K sh· +$70.3M QoQ· Q2 2026
Holocene Advisors, LPAdded
Hedge Fund
$92.4M· 3.7% of total· 0.2% port· 176K sh· +$14.7M QoQ· Q2 2026
Qube Research & Technologies LtdAdded
Hedge Fund
$78.1M· 3.2% of total· 0.1% port· 148K sh· +$33.0M QoQ· Q2 2026
RENAISSANCE TECHNOLOGIES LLCAdded
Hedge Fund
$57.8M· 2.3% of total· 0.1% port· 110K sh· +$32.3M QoQ· Q2 2026
TCW GROUP INCReduced
Hedge Fund
$57.4M· 2.3% of total· 0.4% port· 109K sh· +$42.4M QoQ· Q2 2026
MARSHALL WACE, LLPAdded
Hedge Fund
$49.0M· 2.0% of total· 0.0% port· 93K sh· +$43.8M QoQ· Q2 2026
MILLENNIUM MANAGEMENT LLCAdded
Hedge Fund
$41.6M· 1.7% of total· 0.0% port· 79K sh· +$39.9M QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCReduced
Hedge Fund
$40.4M· 1.6% of total· 0.0% port· 77K sh· +$40.3M QoQ· Q2 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.Added
Hedge Fund
$37.0M· 1.5% of total· 0.1% port· 70K sh· +$1.1M QoQ· Q2 2026
JUPITER ASSET MANAGEMENT LTDAdded
Hedge Fund
$33.8M· 1.4% of total· 0.2% port· 64K sh· +$11.4M QoQ· Q2 2026
PineBridge Investments, L.P.Reduced
Hedge Fund
$31.6M· 1.3% of total· 0.2% port· 50K sh· $-24.0M QoQ· Q3 2025
Man Group plcAdded
Hedge Fund
$27.0M· 1.1% of total· 0.0% port· 51K sh· $-14.7M QoQ· Q2 2026
Rockefeller Capital Management L.P.Reduced
Hedge Fund
$27.0M· 1.1% of total· 0.0% port· 51K sh· $-101.2M QoQ· Q2 2026
Gotham Asset Management, LLCReduced
Hedge Fund
$24.8M· 1.0% of total· 0.1% port· 47K sh· $-17.5M QoQ· Q2 2026
CITADEL ADVISORS LLCReduced
Hedge Fund
$20.5M· 0.8% of total· 0.0% port· 39K sh· +$1.9M QoQ· Q2 2026
Bridgewater Associates, LPAdded
Hedge Fund
$17.7M· 0.7% of total· 0.1% port· 34K sh· +$12.2M QoQ· Q2 2026
FRED ALGER MANAGEMENT, LLCReduced
Hedge Fund
$10.3M· 0.4% of total· 0.0% port· 20K sh· $-2.5M QoQ· Q2 2026
Woodline Partners LPAdded
Hedge Fund
$9.0M· 0.4% of total· 0.0% port· 17K sh· +$8.2M QoQ· Q2 2026
ExodusPoint Capital Management, LPAdded
Hedge Fund
$6.8M· 0.3% of total· 0.0% port· 13K sh· — QoQ· Q2 2026
Brevan Howard Capital Management LPAdded
Hedge Fund
$5.6M· 0.2% of total· 0.0% port· 11K sh· — QoQ· Q2 2026
FARALLON CAPITAL MANAGEMENT LLCAdded
Hedge Fund
$4.7M· 0.2% of total· 0.0% port· 9K sh· — QoQ· Q2 2026
Schonfeld Strategic Advisors LLCReduced
Hedge Fund
$4.1M· 0.2% of total· 0.0% port· 8K sh· $-3.8M QoQ· Q2 2026
Magnetar Financial LLCAdded
Hedge Fund
$968K· 0.0% of total· 0.0% port· 2K sh· +$274K QoQ· Q2 2026
BALYASNY ASSET MANAGEMENT LLCAdded
Hedge Fund
$952K· 0.0% of total· 0.0% port· 2K sh· $-425K QoQ· Q2 2026
Fulcrum Asset Management LLPAdded
Hedge Fund
$565K· 0.0% of total· 0.1% port· 1K sh· +$10K QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPAdded
Hedge Fund
$537K· 0.0% of total· 0.0% port· 1K sh· +$42K QoQ· Q2 2026
Hudson Bay Capital Management LPAdded
Hedge Fund
$358K· 0.0% of total· 0.0% port· 680 sh· — QoQ· Q2 2026
HARRIS ASSOCIATES L PReduced
Institutional Manager
$240K· 0.0% of total· 0.0% port· 455 sh· $-14K QoQ· Q2 2026
1–10 of 33
1 / 4
Loading recent insider activity…
← Stock ownership