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Of the 20 tracked institutions holding IDXX, 13 have a 3-year clone track record — 9 of them beat the S&P. Average holder's clone alpha: +2.7pt. It's a gauge of who owns the name, not just how many.
Among the 20 tracked institutional investors we monitor, IDXX (IDEXX LABS INC) is held with a combined value of $16.04B across 26,522,275 shares. The largest holder is VANGUARD GROUP INC with a position worth $6.73B (0.10% of their portfolio). RENAISSANCE TECHNOLOGIES LLC opened a new position in the most recent quarter. 13 funds increased their holdings. 6 funds reduced their position.
Total Institutional Value
$16.04B
Total Shares Held
26,522,275
Institutional Holders
20
% of Shares Outstanding
33.6%
of 78.88M shares · SEC 2026-04-30
Days to Cover
2.5-9.4%
1.94M shares short · FINRA 2026-06-30
Tracked 13F institutions hold 33.6% of IDXX's shares outstanding. This is a floor: 13F filings arrive on a ~45-day lag and we track only a subset of institutional filers, so true institutional ownership is higher. Shares-outstanding is the latest SEC cover-page figure (as of 2026-04-30), not a live float.
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | VANGUARD GROUP INC | $6.73B | 0.10% | -0.2% |
| 2 | BlackRock, Inc. | $4.70B | 0.08% | -2.0% |
| 3 | STATE STREET CORP | $2.06B | 0.07% | +0.5% |
| 4 | Fundsmith LLP | $823.61M | 6.42% | -21.9% |
| 5 | Capital Research Global Investors | $439.01M | 0.07% | +28.6% |
| 6 | WELLINGTON MANAGEMENT GROUP LLP | $413.26M | 0.08% | -5.6% |
| 7 | PRICE T ROWE ASSOCIATES INC /MD/ | $358.52M | 0.04% | -33.0% |
| 8 | FMR LLC | $159.00M | 0.01% | +12.6% |
| 9 | Point72 Asset Management, L.P. | $72.64M | 0.13% | +1053.9% |
| 10 | MILLENNIUM MANAGEMENT LLC | $60.15M | 0.03% | +83.7% |
| Member | Type | Date |
|---|---|---|
| April McClain Delaney | Sell | Jan 13, 2026 |
| April McClain Delaney | Sell | Oct 16, 2025 |
| Byron Donalds | Buy | Sep 4, 2025 |
| April McClain Delaney | Sell |
As of the latest SEC 13F filings, VANGUARD GROUP INC is the largest institutional holder of IDXX with a position worth $6.73B, representing 0.10% of their portfolio. In total, 20 institutional investors hold IDXX with a combined value of $16.04B.
In the most recent quarter, 1 fund opened a new position in IDXX. Additionally, 13 increased their holdings and 6 reduced their positions.
Institutional investors hold $16.04B worth of IDXX stock across 20 positions. The largest institutional holder is VANGUARD GROUP INC with $6.73B in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For IDXX, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their IDXX positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
| Aug 7, 2025 |
| April McClain Delaney | Sell | Jul 9, 2025 |
| Rob Bresnahan | Buy | May 15, 2025 |
| Jefferson Shreve | Sell | May 12, 2025 |
| April McClain Delaney | Buy | Apr 9, 2025 |
Showing 8 of 15. STOCK Act disclosures lag up to 45 days.
Last Close
$544.32
2026-07-24
YTD
-18.8%
12% of 52-week range
