IDXX Institutional Ownership Changes & 13F Activity


IDEXX LABORATORIES INC (IDXX) institutional ownership data tracks hedge funds, asset managers, pension funds, and institutional investors holding Amazon shares based on recent SEC 13F filings (Q1 2026). Recent filings show notable position changes from firms including Sequoia Financial Advisors, Parnassus Endeavor Fund, Jensen Investment Management, Fundsmith, and Polen Capital Management. This page analyzes institutional buying and selling activity, increased and reduced positions, new holdings, and sold-out positions to help investors understand institutional sentiment, portfolio allocation trends, and hedge fund conviction in IDEXX LABORATORIES INC stock.


Key Insights:

Related IDXX Insights:

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q3 2023FundsmithBuy3,0032,964,554$1,296,310,528
Q3 2023Renaissance Technologies LLCBuy66,800124,804$54,573
Q3 2023Sequoia Financial AdvisorsBuy151,687$737,675
Q2 2023Torray FundSell-3479,784$4,913,818
Q2 2023Fundsmith Investment ServicesBuy15,1081,019,528$512,037,547
Q2 2023FundsmithBuy7,3552,961,551$1,487,379,759
Q2 2023Sequoia Financial AdvisorsBuy341,672$839,729
Q1 2023Torray FundSell-18310,131$5,066,310
Q1 2023Fundsmith Investment ServicesBuy3241,004,420$502,290,354
Q1 2023FundsmithSell-489,5362,954,196$1,477,334,336
Q1 2023Sequoia Financial AdvisorsBuy551,638$819,132
Q1 2023Mairs & Power Growth FundSell-2672,828$1,414,226
Q1 2023Parnassus Endeavor FundSell-13,41248,983$24,495,419
Q4 2022Torray FundSell-10910,314$4,207,699
Q4 2022Fundsmith Investment ServicesBuy6,2201,004,096$409,631,004
Q4 2022FundsmithSell-177,0453,443,732$1,404,904,907
Q4 2022Sequoia Financial AdvisorsBuy7161,583$645,863
Q4 2022Mairs & Power Growth FundSell-4083,095$1,262,636
Q4 2022Durable Capital PartnersBuy316208,030$84,867,919
Q3 2022Torray FundBuy1,14810,423$3,396
Q3 2022Fundsmith Investment ServicesSell-1,389997,876$325,108
Q3 2022FundsmithBuy1,9023,620,777$1,179,649
Q3 2022Sequoia Financial AdvisorsSell-124867$282
Q3 2022Mairs & Power Growth FundSell-943,503$1,141
Q3 2022Renaissance Technologies LLCSell-159,50058,004$18,898
Q3 2022Durable Capital PartnersBuy94,548207,714$67,673
Q2 2022Torray FundBuy89,275$3,253
Q2 2022Fundsmith Investment ServicesBuy46,837999,265$350,472
Q2 2022FundsmithBuy8133,618,875$1,269,248
Q2 2022Sequoia Financial AdvisorsSell-1991$348

Frequently asked questions about IDXX activity

  • Which institutional owners are buying IDXX?

    Institutional owners buying IDXX include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in IDXX activity?

    "Buy" means an investor increased their reported position in IDXX compared to the prior reporting period. This reflects growing exposure to IDEXX LABORATORIES INC (IDXX) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in IDXX increasing?

    Institutional interest in IDXX can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.