Idexx Laboratories Inc
$545.16-2.1%
+$19.0B
Net Activity
+88.79% total shares
Institutions Holding
1300
Popularity Rank
#311
Avg Weight
0.20%
Total Value
$39.5B
Market Cap
$44.2B
1300 institutions currently hold IDXX, with 582 net buyers and 626 net sellers this quarter.
Institutional Moves (Q2 2026)
Neutral
Based on recent trading activity
Net Selling Institutions
626
Net Buying Institutions
582
Top 5 by Value
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Across its top 20 institutional holders, IDXX's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 8/100, avg. turnover score 34/100).
IDXX ranks #311 out of 37501 tracked stocks by institutional interest — one of the most closely watched names in our coverage.
IDXX is a top-conviction position for Capital Counsel Llc/ny — at 8.6% of their entire disclosed 13F portfolio, it's one of their largest single bets, not just a passing allocation.
The largest dollar stake in IDXX belongs to BlackRock, Inc., but the position matters far more to Capital Counsel Llc/ny, who has 8.6% of their own portfolio riding on it — a reminder that the biggest holder by size and the holder with the biggest bet aren't always the same fund.
Arrowstreet Capital, Limited Partnership has added to its IDXX position for two straight quarters, increasing it by $189.4M to reach $561.8M today.
BlackRock has trimmed its IDXX position for two straight quarters, cutting it by $1.5B while still holding $4.3B.
IDXX is down 2.1% today, but institutions show net buying of $19.0B this quarter — a divergence between today's price move and the underlying institutional flow.
IDXX posted net income of $1.1B over the trailing twelve months, and currently trades at a P/E of 38.8.
+$4.6B
Total Buy Value
$2.8B
Total Sell Value
582
Net Buyers
626
Net Sellers
IDXX
Q2 2026
Top 5 Institutional Movers
IDXX does not currently show a 13F-and-insider convergence signal — its insider confidence score is 0/100, below the threshold this product uses to flag combined buying pressure.
13F data as of 2026-06-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.
0
unique buyers
—
buy value
12-Month Buy/Sell Activity
| Action | Insider | Date | Value |
|---|---|---|---|
| Sell | Hunt Nimrata | 2026-03-03 | $1.12M |
| Sell | Jonathan Jay Mazelsky | 2026-02-26 | $1.88M |
| Sell | Jonathan Jay Mazelsky | 2026-02-26 | $713K |
| Sell | Jonathan Jay Mazelsky | 2026-02-26 | $834K |
| Sell | Jonathan Jay Mazelsky | 2026-02-26 | $1.72M |
| Sell | Jonathan Jay Mazelsky | 2026-02-26 | $662K |
| Sell | Jonathan Jay Mazelsky | 2026-02-26 | $793K |
| Sell | Jonathan Jay Mazelsky | 2026-02-26 | $1.89M |
| Action | Member | Trade Date | Amount |
|---|---|---|---|
| Sell (Full) | Thomas H Tuberville Senate | 2024-01-22 | $1K–$15K |
| Buy | Thomas H Tuberville Senate | 2023-04-03 | $1K–$15K |
| Buy | Thomas H Tuberville Senate | 2023-04-03 | $1K–$15K |
No Form 144 planned sale filings in the last 90 days
No Schedule 13D/13G filings for this ticker
1
Filings (14d)
IDEXX Laboratories published its Q2 2026 results on August 4, with the press release included as an exhibit to this 8-K. The filing itself is a routine earnings disclosure — it doesn't include any specific financial figures, just a note that the full press release is attached.
View Full Filing (SEC EDGAR)45168D104, 45168d104
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54
Articles
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Access IDXX's institutional ownership data programmatically:
REST API
curl https://alphasmo.com/api/v1/market/stock/IDXXCLI
npx alphasmo stocks get IDXX