Idexx Laboratories
IDXX
1,302 hedge funds and large institutions have $46.1B invested in Idexx Laboratories in 2025 Q3 according to their latest regulatory filings, with 162 funds opening new positions, 416 increasing their positions, 491 reducing their positions, and 75 closing their positions.
116% more first-time investments, than exits
New positions opened: 162 | Existing positions closed: 75
23% more funds holding in top 10
Funds holding in top 10: 22 → 27 (+5)
21% more call options, than puts
Call options by funds: $175M | Put options by funds: $144M
15% more capital invested
Capital invested by funds: $40B → $46.1B (+$6.14B)
6% more funds holding
Funds holding: 1,234 → 1,302 (+68)
2.42% less ownership
Funds ownership: 92.67% → 90.25% (-2.4%)
15% less repeat investments, than reductions
Existing positions increased: 416 | Existing positions reduced: 491
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Bank of New York Mellon
New York
|
+$367M |
| 2 |
JP Morgan Chase
New York
|
+$198M |
| 3 |
ZIG
Zurich Insurance Group
Zurich,
Switzerland
|
+$137M |
| 4 |
Principal Financial Group
Des Moines,
Iowa
|
+$114M |
| 5 |
Invesco
Atlanta,
Georgia
|
+$98.2M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
GIM
Generation Investment Management
London,
United Kingdom
|
-$186M |
| 2 |
Select Equity Group
New York
|
-$177M |
| 3 |
Vontobel Holding
Zurich,
Switzerland
|
-$162M |
| 4 |
William Blair Investment Management
Chicago,
Illinois
|
-$137M |
| 5 |
MBI
Montrusco Bolton Investments
Montreal,
Quebec, Canada
|
-$120M |
IDXX Hedge Fund Activity: Q3 2025 in Review
1,302 of the 7,620 institutional investors tracked by Wall St. Rank reported a position in Idexx Laboratories (IDXX) for Q3 2025, worth a combined $46.1B — up 15% from $40B a quarter earlier.
Buyers outnumbered sellers: 162 funds opened new IDXX positions and 75 closed out — a net gain of 87 holders — while 416 added to existing stakes and 491 trimmed.
The largest buyer was Bank of New York Mellon, adding an estimated $367M. The largest seller was Generation Investment Management, cutting an estimated $186M.
- 1,302 institutional investors held Idexx Laboratories (IDXX) as of Q3 2025, up from 1,234 in Q2 2025.
- Funds reported $46.1B of Idexx Laboratories stock for Q3 2025, up 15% quarter-over-quarter.
- 162 funds opened new Idexx Laboratories positions in Q3 2025 and 75 closed out, a net change of +87 holders.
- The largest Idexx Laboratories buyer in Q3 2025 was Bank of New York Mellon, an estimated $367M added.
- The largest Idexx Laboratories seller in Q3 2025 was Generation Investment Management, an estimated $186M sold.
Based on aggregated 13F filings for Q3 2025.