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
Q4 2024Jensen Investment ManagementBuy9309,020$3,729,229
Q4 2024Sequoia Financial AdvisorsBuy981,685$696,573
Q4 2024Mairs & Power Growth FundSell-1002,402$993,083
Q4 2024Renaissance Technologies LLCSell-10,70025,000$10,336,000
Q4 2024Parnassus Endeavor FundSell-63648,347$19,988,584
Q4 2024FundsmithSell-1,3072,662,855$1,100,930,771
Q3 2024Jensen Investment ManagementBuy2,9708,090$4,087,230
Q3 2024Fundsmith Investment ServicesBuy1,846865,008$437,019,342
Q3 2024FundsmithBuy9702,664,162$1,345,987,926
Q3 2024Sequoia Financial AdvisorsSell-21,587$801,694
Q3 2024Renaissance Technologies LLCBuy15,09635,700$18,036,354
Q2 2024Jensen Investment ManagementBuy5,1205,120$2,494,464
Q2 2024Fundsmith Investment ServicesBuy42,281863,162$420,532,526
Q2 2024FundsmithSell-51,5702,663,192$1,297,507,142
Q2 2024Sequoia Financial AdvisorsBuy1171,589$774,074
Q2 2024Mairs & Power Growth FundSell-802,502$1,218,974
Q2 2024Renaissance Technologies LLCSell-13,20020,604$10,038,269
Q1 2024Torray FundBuy58,13458,518$207,333
Q1 2024Fundsmith Investment ServicesBuy2,262820,881$443,218,278
Q1 2024FundsmithSell-14,1552,714,762$1,465,781,447
Q1 2024Renaissance Technologies LLCSell-91,00033,804$18,252
Q1 2024Sequoia Financial AdvisorsSell-5071,472$794,680
Q1 2024Mairs & Power Growth FundSell-1952,582$1,394,099
Q4 2023Torray FundSell-9,008384$213,139
Q4 2023Fundsmith Investment ServicesSell-170,973818,619$454,374,476
Q4 2023FundsmithSell-235,6372,728,917$1,514,685,381
Q4 2023Sequoia Financial AdvisorsBuy2921,979$1,098,346
Q4 2023Mairs & Power Growth FundSell-512,777$1,541,374
Q3 2023Torray FundSell-3929,392$4,106,840
Q3 2023Fundsmith Investment ServicesSell-29,936989,592$432,718,894

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.