IDXX
IDEXX Laboratories, Inc. · Healthcare · Medical - Diagnostics & Research
Momentum inputs (comparable managers):
holder breadth -11.8% ·
share flow -0.4% ·
net new positions -13.3%
· formula
Broad distribution: falling shares and fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q3 2026 | 7 | 0 | 471.56K | $245.77M | n/a | n/a |
| Q2 2026 | 168 | 0 | 55.55M | $29.26B | +7 | −6 |
| Q1 2026 | 170 | +1 | 53.67M | $30.16B | +5 | −5 |
| Q4 2025 | 168 | +2 | 58.18M | $39.32B | +3 | n/a |
| Q3 2025 | 21 | +1 | 29.88M | $19.09B | +1 | −1 |
| Q2 2025 | 18 | 0 | 26.38M | $14.14B | +1 | −1 |
| Q1 2025 | 15 | -2 | 9.43M | $3.96B | n/a | −2 |
| Q4 2024 | 17 | -1 | 9.47M | $3.92B | n/a | −1 |
| Q3 2024 | 17 | +1 | 5.70M | $2.88B | +1 | n/a |
| Q2 2024 | 16 | n/a | 5.12M | $2.49B | n/a | n/a |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | State Street Global Advisors ✦ (passive) | 3.65M | +0.3% | $1.53B | 0.1% | ▲ Add | 2 | SEC ↗ |
| 2 | Geode Capital Management ✦ (passive) | 2.41M | +4.9% | $1.01B | 0.1% | ▲ Add | 4 | SEC ↗ ×2 |
| 3 | T. Rowe Price ✦ | 1.99M | +71.0% | $835.24M | 0.1% | ▲ Add | 4 | SEC ↗ ×2 |
| 4 | Norges Bank ✦ (passive) | 347.96K | -65.1% | $146.13M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 5 | D. E. Shaw & Co. ✦ | 238.23K | +12.3% | $100.05M | 0.1% | ▲ Add | 4 | SEC ↗ ×2 |
| 6 | Wellington Management ✦ | 219.57K | +12.4% | $92.21M | 0.0% | ▲ Add | 4 | SEC ↗ ×4 |
| 7 | Arrowstreet Capital ✦ | 190.91K | +34.3% | $80.17M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 8 | AQR Capital Management ✦ | 175.78K | +43.3% | $72.79M | 0.1% | ▲ Add | 4 | SEC ↗ ×6 |
| 9 | Marshall Wace ✦ | 110.55K | -46.6% | $46.43M | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 10 | Millennium Management ✦ | 39.51K | -84.6% | $16.59M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 11 | Two Sigma Investments ✦ | 34.34K | -60.8% | $14.42M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 12 | Gotham Asset Management ✦ | 20.45K | +48.6% | $8.59M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 13 | Bridgewater Associates ✦ | 3.43K | -61.2% | $1.44M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 14 | Citadel Advisors ✦ | 1.07K | -98.6% | $450,186 | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 15 | Fisher Asset Management ✦ | 643 | -7.8% | $270,227 | 0.0% | ▼ Trim | 4 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
Exited
| Adage Capital Partners | $11.98M | was 0.0% |
| Renaissance Technologies | $10.34M | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 1,302 holders, 70.72M shares, $38.50B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold: shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Director · 2.20K sh · $1.17M
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology