IDEXX LABORATORIES INC (IDXX) Institutional Ownership Changes & 13F Activity

IDEXX LABORATORIES INC (IDXX). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings. This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Fundsmith, Polen Capital Management, Fundsmith Investment Services, Renaissance Technologies LLC, and Parnassus Endeavor Fund.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2024Mairs & Power Growth FundSell-1952,582$1,394,099
Q4 2023FundsmithSell-235,6372,728,917$1,514,685,381
Q4 2023Fundsmith Investment ServicesSell-170,973818,619$454,374,476
Q4 2023Torray FundSell-9,008384$213,139
Q4 2023Sequoia Financial AdvisorsBuy2921,979$1,098,346
Q4 2023Mairs & Power Growth FundSell-512,777$1,541,374
Q3 2023Renaissance Technologies LLCBuy66,800124,804$54,573
Q3 2023Fundsmith Investment ServicesSell-29,936989,592$432,718,894
Q3 2023FundsmithBuy3,0032,964,554$1,296,310,528
Q3 2023Torray FundSell-3929,392$4,106,840
Q3 2023Sequoia Financial AdvisorsBuy151,687$737,675
Q2 2023Fundsmith Investment ServicesBuy15,1081,019,528$512,037,547
Q2 2023FundsmithBuy7,3552,961,551$1,487,379,759
Q2 2023Torray FundSell-3479,784$4,913,818
Q2 2023Sequoia Financial AdvisorsBuy341,672$839,729
Q1 2023FundsmithSell-489,5362,954,196$1,477,334,336
Q1 2023Parnassus Endeavor FundSell-13,41248,983$24,495,419
Q1 2023Fundsmith Investment ServicesBuy3241,004,420$502,290,354
Q1 2023Mairs & Power Growth FundSell-2672,828$1,414,226
Q1 2023Torray FundSell-18310,131$5,066,310
Q1 2023Sequoia Financial AdvisorsBuy551,638$819,132
Q4 2022FundsmithSell-177,0453,443,732$1,404,904,907
Q4 2022Fundsmith Investment ServicesBuy6,2201,004,096$409,631,004
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
Q4 2022Torray FundSell-10910,314$4,207,699
Q3 2022Renaissance Technologies LLCSell-159,50058,004$18,898
Q3 2022Durable Capital PartnersBuy94,548207,714$67,673
Q3 2022FundsmithBuy1,9023,620,777$1,179,649

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.

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