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IDXX · Idexx Laboratories Inc /De

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Market Cap
$43.72B
Shares
78.78M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 1,287
Total Value: $38,876,772,793
Total Shares: 73,848,633
Showing 1–100 of 1,306 holdings by value · page 1 of 14

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 1,287 13F filers · Δ vs Mar 31, 2026
Top Holder
11.1%
Sep 2023 → Jun 2026 · range 11.1% – 13.7%
−0.6 pts
Top 5
33.3%
Sep 2023 → Jun 2026 · range 33.1% – 38.5%
+0.2 pts
Top 10
44.3%
Sep 2023 → Jun 2026 · range 43.7% – 49.8%
+0.6 pts
HHI
304
Sep 2023 → Jun 2026 · range 304 – 447
Broadly held−4

Quarterly Activity

vs Mar 31, 2026
New
115
Increased
473
Decreased
499
Sold Out
147
Unchanged
200
Holder count: -32
Institutional value: -3.7%
Shares held: +2.8%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 1,306
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 874716 CUSIP 45168D104 13F (30d) 820 filings 792 filers Visit website Investor relations