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 2017Mairs & Power Growth FundBuy6004,598$711
Q4 2016Renaissance Technologies LLCSell-81,104613,200$71,910
Q4 2016FundsmithSell-14,0174,476,866$528,629
Q3 2016Renaissance Technologies LLCBuy156,900694,304$78,269
Q3 2016FundsmithBuy21,5474,490,883$506,257
Q2 2016FundsmithBuy258,6574,469,336$415,023
Q2 2016Renaissance Technologies LLCBuy99,900537,404$49,903
Q1 2016FundsmithBuy1,719,5114,210,679$329,780
Q1 2016Renaissance Technologies LLCBuy309,804437,504$34,265
Q4 2015FundsmithBuy1,610,6822,491,168$181,656
Q4 2015Renaissance Technologies LLCBuy94,600127,700$9,312
Q3 2015FundsmithBuy813,646880,486$65,376
Q3 2015Renaissance Technologies LLCSell-221,70433,100$2,458
Q2 2015FundsmithBuy41,34766,840$4,287
Q2 2015Renaissance Technologies LLCSell-37,148254,804$16,343
Q2 2015Mairs & Power Growth FundBuy1,7993,998$256
Q1 2015Renaissance Technologies LLCSell-26,800291,952$45,101
Q1 2015FundsmithBuy25,49325,493$3,938
Q4 2014Renaissance Technologies LLCBuy26,700318,752$47,261
Q4 2014Mairs & Power Growth FundSell-1,0002,199$326
Q3 2014Renaissance Technologies LLCBuy140,652292,052$34,412
Q3 2014Mairs & Power Growth FundBuy2003,199$377
Q2 2014Renaissance Technologies LLCBuy92,500151,400$20,222
Q2 2014Mairs & Power Growth FundSell-2,0002,999$401
Q1 2014Renaissance Technologies LLCSell-14,65258,900$7,150
Q4 2013Renaissance Technologies LLCSell-45,14873,552$7,824
Q4 2013Mairs & Power Growth FundBuy4,9994,999$532
Q3 2013Renaissance Technologies LLCSell-223,752118,700$11,828
Q2 2013Renaissance Technologies LLCBuy342,452342,452$30,715
Q2 2013First Eagle U.S. ValueBuy4,0004,000$359

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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