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:
- Q1 2026 SEC 13F filings show notable institutional position changes in IDXX.
- Sequoia Financial Advisors, Parnassus Endeavor Fund, Jensen Investment Management, Fundsmith, and Polen Capital Management were among firms reporting significant share count changes.
- Institutional ownership trends can help investors monitor hedge fund sentiment and long-term conviction in IDXX stock.
Related IDXX Insights:
| Portfolio quarter | Name | Type | Quantity | Remaining | Reported stock balance |
|---|---|---|---|---|---|
| Q1 2016 | Fundsmith | Buy | 1,719,511 | 4,210,679 | $329,780 |
| Q4 2015 | Renaissance Technologies LLC | Buy | 94,600 | 127,700 | $9,312 |
| Q4 2015 | Fundsmith | Buy | 1,610,682 | 2,491,168 | $181,656 |
| Q3 2015 | Renaissance Technologies LLC | Sell | -221,704 | 33,100 | $2,458 |
| Q3 2015 | Fundsmith | Buy | 813,646 | 880,486 | $65,376 |
| Q2 2015 | Mairs & Power Growth Fund | Buy | 1,799 | 3,998 | $256 |
| Q2 2015 | Fundsmith | Buy | 41,347 | 66,840 | $4,287 |
| Q2 2015 | Renaissance Technologies LLC | Sell | -37,148 | 254,804 | $16,343 |
| Q1 2015 | Fundsmith | Buy | 25,493 | 25,493 | $3,938 |
| Q1 2015 | Renaissance Technologies LLC | Sell | -26,800 | 291,952 | $45,101 |
| Q4 2014 | Mairs & Power Growth Fund | Sell | -1,000 | 2,199 | $326 |
| Q4 2014 | Renaissance Technologies LLC | Buy | 26,700 | 318,752 | $47,261 |
| Q3 2014 | Mairs & Power Growth Fund | Buy | 200 | 3,199 | $377 |
| Q3 2014 | Renaissance Technologies LLC | Buy | 140,652 | 292,052 | $34,412 |
| Q2 2014 | Mairs & Power Growth Fund | Sell | -2,000 | 2,999 | $401 |
| Q2 2014 | Renaissance Technologies LLC | Buy | 92,500 | 151,400 | $20,222 |
| Q1 2014 | Renaissance Technologies LLC | Sell | -14,652 | 58,900 | $7,150 |
| Q4 2013 | Mairs & Power Growth Fund | Buy | 4,999 | 4,999 | $532 |
| Q4 2013 | Renaissance Technologies LLC | Sell | -45,148 | 73,552 | $7,824 |
| Q3 2013 | Renaissance Technologies LLC | Sell | -223,752 | 118,700 | $11,828 |
| Q2 2013 | First Eagle U.S. Value | Buy | 4,000 | 4,000 | $359 |
| Q2 2013 | Renaissance Technologies LLC | Buy | 342,452 | 342,452 | $30,715 |
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.