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
Q1 2026Jensen Investment ManagementSell-13,570$2,005,947
Q1 2026Sequoia Financial AdvisorsBuy1,4644,701$2,641,220
Q1 2026Parnassus Endeavor FundSell-16832,709$18,378,860
Q4 2025Jensen Investment ManagementSell-8593,571$2,415,889
Q4 2025Mairs & Power Growth FundSell-132,131$1,441,685
Q4 2025Polen Capital ManagementSell-166,610960,537$649,831,919
Q4 2025FundsmithSell-734,4221,876,035$1,269,193,959
Q3 2025Jensen Investment ManagementSell-5,9804,430$2,830,283
Q3 2025Mairs & Power Growth FundSell-802,144$1,369,780
Q3 2025Sequoia Financial AdvisorsBuy5433,237$2,067,820
Q3 2025Parnassus Endeavor FundSell-36032,877$21,004,787
Q3 2025Fundsmith Investment ServicesSell-156,259688,357$439,784,404
Q3 2025Polen Capital ManagementSell-68,2781,127,147$720,123,065
Q3 2025FundsmithSell-28,8322,610,457$1,667,794,873
Q2 2025Jensen Investment ManagementBuy2,22010,410$5,583,299
Q2 2025Lountzis Asset ManagementBuy1232,708$17,542,609
Q2 2025Mairs & Power Growth FundSell-822,224$1,192,820
Q2 2025Sequoia Financial AdvisorsBuy7572,694$1,445,099
Q2 2025Parnassus Endeavor FundSell-3,41633,237$17,826,333
Q2 2025Fundsmith Investment ServicesSell-9,743844,616$453,001,345
Q2 2025Polen Capital ManagementBuy1,195,4251,195,425$641,154,277
Q2 2025FundsmithSell-9,0422,639,289$1,415,556,262
Q1 2025Jensen Investment ManagementSell-8308,190$3,439,391
Q1 2025Lountzis Asset ManagementBuy32,69632,696$14,189,737
Q1 2025Sequoia Financial AdvisorsBuy2521,937$813,368
Q1 2025Mairs & Power Growth FundSell-962,306$968,405
Q1 2025Parnassus Endeavor FundSell-11,69436,653$15,392,427
Q1 2025Durable Capital PartnersBuy156,727364,757$153,179,702
Q1 2025Fundsmith Investment ServicesSell-10,649854,359$358,788,062
Q1 2025FundsmithSell-14,5242,648,331$1,112,166,603

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.