Idexx Laboratories
IDXX
1,318 hedge funds and large institutions have $41.2B invested in Idexx Laboratories in 2026 Q1 according to their latest regulatory filings, with 124 funds opening new positions, 438 increasing their positions, 515 reducing their positions, and 174 closing their positions.
48% more call options, than puts
Call options by funds: $77.4M | Put options by funds: $52.2M
0.94% less ownership
Funds ownership: 93.15% → 92.2% (-0.94%)
5% less funds holding
Funds holding: 1,386 → 1,318 (-68)
15% less repeat investments, than reductions
Existing positions increased: 438 | Existing positions reduced: 515
18% less capital invested
Capital invested by funds: $50.3B → $41.2B (-$9.1B)
29% less first-time investments, than exits
New positions opened: 124 | Existing positions closed: 174
36% less funds holding in top 10
Funds holding in top 10: 25 → 16 (-9)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Capital World Investors
Los Angeles,
California
|
+$319M |
| 2 |
Arrowstreet Capital
Boston,
Massachusetts
|
+$185M |
| 3 |
Alyeska Investment Group
Chicago,
Illinois
|
+$130M |
| 4 |
Capital Research Global Investors
Los Angeles,
California
|
+$111M |
| 5 |
MBI
Montrusco Bolton Investments
Montreal,
Quebec, Canada
|
+$106M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fundsmith LLP
London,
United Kingdom
|
-$263M |
| 2 |
T. Rowe Price Associates
Baltimore,
Maryland
|
-$201M |
| 3 |
Polen Capital Management
Boca Raton,
Florida
|
-$170M |
| 4 |
Morgan Stanley
New York
|
-$152M |
| 5 |
BlackRock
New York
|
-$109M |
IDXX Hedge Fund Activity: Q1 2026 in Review
1,318 of the 8,208 institutional investors tracked by Wall St. Rank reported a position in Idexx Laboratories (IDXX) for Q1 2026, worth a combined $41.2B — down 18% from $50.3B a quarter earlier.
Sellers outnumbered buyers: 174 funds closed out of IDXX and 124 opened new positions — a net loss of 50 holders — while 515 trimmed existing stakes and 438 added.
The largest buyer was Capital World Investors, opening a new position worth an estimated $319M. The largest seller was Fundsmith LLP, cutting an estimated $263M.
- 1,318 institutional investors held Idexx Laboratories (IDXX) as of Q1 2026, down from 1,386 in Q4 2025.
- Funds reported $41.2B of Idexx Laboratories stock for Q1 2026, down 18% quarter-over-quarter.
- 124 funds opened new Idexx Laboratories positions in Q1 2026 and 174 closed out, a net change of -50 holders.
- The largest Idexx Laboratories buyer in Q1 2026 was Capital World Investors, an estimated $319M added.
- The largest Idexx Laboratories seller in Q1 2026 was Fundsmith LLP, an estimated $263M sold.
Based on aggregated 13F filings for Q1 2026.