IDXX
IDEXX Laboratories Inc
NASDAQ: IDXX · HEALTHCARE · DIAGNOSTICS & RESEARCH
$562.91
+0.30% today
Updated 2026-10-28
Market cap
$44.15B
P/E ratio
39.38
P/S ratio
9.70x
EPS (TTM)
$14.23
Dividend yield
—
52W range
$501 – $770
Volume
0.5M
IDEXX Laboratories Inc (IDXX) Insider transactions
Net insider activity
Net selling (29,868 shares)
Buy transactions
46
Sell transactions
54
All transactions
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-09-04 | KINGSLEY, LAWRENCE D | Director | Sale | 2,203 | — | — |
| 2026-09-04 | KINGSLEY, LAWRENCE D | Director | Buy | 2,203 | $114.17 | $251516.51 |
| 2026-08-20 | EMERSON, ANDREW | EVP, CFO and Treasurer | Sale | 265 | — | — |
| 2026-08-20 | EMERSON, ANDREW | EVP, CFO and Treasurer | Buy | 265 | $178.26 | $47238.90 |
| 2026-08-20 | EMERSON, ANDREW | EVP, CFO and Treasurer | Sale | 86 | — | — |
| 2026-07-30 | HOOLEY, JOSEPH L | Director | Buy | 49 | $558.80 | $27381.20 |
| 2026-06-01 | FENNELL, GEORGE | Executive Vice President | Sale | 639 | — | — |
| 2026-06-01 | FENNELL, GEORGE | Executive Vice President | Buy | 639 | — | — |
| 2026-06-01 | FENNELL, GEORGE | Executive Vice President | Sale | 284 | $566.79 | $160968.36 |
| 2026-05-12 | VANDEBROEK, SOPHIE V. | Director | Buy | 234 | — | — |
| 2026-05-12 | VANDEBROEK, SOPHIE V. | Director | Buy | 525 | — | — |
| 2026-05-12 | SAMAD, SAM | Director | Buy | 525 | — | — |
| 2026-05-12 | SAMAD, SAM | Director | Buy | 234 | — | — |
| 2026-05-12 | PEACOCK, KAREN | Director | Buy | 525 | — | — |
| 2026-05-12 | PEACOCK, KAREN | Director | Buy | 234 | — | — |
| 2026-05-12 | KINGSLEY, LAWRENCE D | Director | Buy | 234 | — | — |
| 2026-05-12 | KINGSLEY, LAWRENCE D | Director | Buy | 75 | — | — |
| 2026-05-12 | KINGSLEY, LAWRENCE D | Director | Buy | 525 | — | — |
| 2026-05-12 | KINGSLEY, LAWRENCE D | Director | Buy | 168 | — | — |
| 2026-05-12 | JUNIUS, DANIEL M | Director | Buy | 234 | — | — |
| 2026-05-12 | JUNIUS, DANIEL M | Director | Buy | 525 | — | — |
| 2026-05-12 | HOOLEY, JOSEPH L | Director | Buy | 525 | — | — |
| 2026-05-12 | HOOLEY, JOSEPH L | Director | Buy | 234 | — | — |
| 2026-05-12 | ESSIG, STUART | Director | Buy | 234 | — | — |
| 2026-05-12 | ESSIG, STUART | Director | Buy | 525 | — | — |
| 2026-05-12 | CLAFLIN, BRUCE L. | Director | Buy | 525 | — | — |
| 2026-05-12 | CLAFLIN, BRUCE L. | Director | Buy | 234 | — | — |
| 2026-05-12 | BRITT, IRENE CHANG | Director | Buy | 525 | — | — |
| 2026-05-12 | BRITT, IRENE CHANG | Director | Buy | 234 | — | — |
| 2026-05-07 | VANDEBROEK, SOPHIE V. | Director | Sale | 257 | — | — |
| 2026-05-07 | VANDEBROEK, SOPHIE V. | Director | Buy | 257 | — | — |
| 2026-05-07 | SZOSTAK, M ANNE | Director | Sale | 257 | — | — |
| 2026-05-07 | SZOSTAK, M ANNE | Director | Buy | 257 | — | — |
| 2026-05-07 | PEACOCK, KAREN | Director | Sale | 101 | — | — |
| 2026-05-07 | PEACOCK, KAREN | Director | Buy | 101 | — | — |
| 2026-05-07 | KINGSLEY, LAWRENCE D | Director | Sale | 257 | — | — |
| 2026-05-07 | KINGSLEY, LAWRENCE D | Director | Sale | 82 | — | — |
| 2026-05-07 | KINGSLEY, LAWRENCE D | Director | Buy | 257 | — | — |
| 2026-05-07 | KINGSLEY, LAWRENCE D | Director | Buy | 82 | — | — |
| 2026-05-07 | JUNIUS, DANIEL M | Director | Sale | 257 | — | — |
| 2026-05-07 | JUNIUS, DANIEL M | Director | Buy | 257 | — | — |
| 2026-05-07 | HOOLEY, JOSEPH L | Director | Sale | 158 | — | — |
| 2026-05-07 | HOOLEY, JOSEPH L | Director | Buy | 158 | — | — |
| 2026-04-30 | HOOLEY, JOSEPH L | Director | Buy | 43 | $560.80 | $24114.40 |
| 2026-03-03 | UNDERBERG, SHARON E. | EVP, GC & Corporate Secretary | Sale | 197 | — | — |
| 2026-03-03 | UNDERBERG, SHARON E. | EVP, GC & Corporate Secretary | Buy | 197 | $505.53 | $99589.41 |
| 2026-03-03 | HUNT, NIMRATA | Executive Vice President | Sale | 1,758 | $634.57 | $1.12M |
| 2026-02-27 | MAZELSKY, JONATHAN JAY | Director, President and CEO | Sale | 197 | — | — |
| 2026-02-27 | MAZELSKY, JONATHAN JAY | Director, President and CEO | Buy | 197 | $505.53 | $99589.41 |
| 2026-02-26 | MAZELSKY, JONATHAN JAY | Director, President and CEO | Sale | 23,326 | — | — |
| 2026-02-26 | MAZELSKY, JONATHAN JAY | Director, President and CEO | Buy | 23,326 | $141.60 | $3.30M |
| 2026-02-26 | MAZELSKY, JONATHAN JAY | Director, President and CEO | Sale | 3,660 | $658.92 | $2.41M |
| 2026-02-26 | MAZELSKY, JONATHAN JAY | Director, President and CEO | Sale | 2,860 | $657.84 | $1.88M |
| 2026-02-26 | MAZELSKY, JONATHAN JAY | Director, President and CEO | Sale | 2,859 | $659.75 | $1.89M |
| 2026-02-26 | MAZELSKY, JONATHAN JAY | Director, President and CEO | Sale | 2,589 | $663.04 | $1.72M |
| 2026-02-26 | MAZELSKY, JONATHAN JAY | Director, President and CEO | Sale | 1,669 | $652.49 | $1.09M |
| 2026-02-26 | MAZELSKY, JONATHAN JAY | Director, President and CEO | Sale | 1,488 | $655.85 | $975904.50 |
| 2026-02-26 | MAZELSKY, JONATHAN JAY | Director, President and CEO | Sale | 1,343 | $656.85 | $882142.97 |
| 2026-02-26 | MAZELSKY, JONATHAN JAY | Director, President and CEO | Sale | 1,281 | $650.67 | $833507.63 |
| 2026-02-26 | MAZELSKY, JONATHAN JAY | Director, President and CEO | Sale | 1,200 | $661.10 | $793317.12 |
| 2026-02-26 | MAZELSKY, JONATHAN JAY | Director, President and CEO | Sale | 1,171 | $653.68 | $765454.95 |
| 2026-02-26 | MAZELSKY, JONATHAN JAY | Director, President and CEO | Sale | 1,111 | $654.63 | $727293.26 |
| 2026-02-26 | MAZELSKY, JONATHAN JAY | Director, President and CEO | Sale | 1,095 | $651.49 | $713377.83 |
| 2026-02-26 | MAZELSKY, JONATHAN JAY | Director, President and CEO | Sale | 1,000 | $662.16 | $662156.70 |
| 2026-02-26 | HUNT, NIMRATA | Executive Vice President | Sale | 2,693 | $661.54 | $1.78M |
| 2026-02-19 | ERICKSON, MICHAEL G | Executive Vice President | Sale | 817 | — | — |
| 2026-02-19 | ERICKSON, MICHAEL G | Executive Vice President | Sale | 719 | — | — |
| 2026-02-19 | ERICKSON, MICHAEL G | Executive Vice President | Sale | 483 | — | — |
| 2026-02-19 | ERICKSON, MICHAEL G | Executive Vice President | Sale | 197 | — | — |
| 2026-02-19 | ERICKSON, MICHAEL G | Executive Vice President | Sale | 183 | — | — |
| 2026-02-19 | ERICKSON, MICHAEL G | Executive Vice President | Buy | 817 | $178.26 | $145638.42 |
| 2026-02-19 | ERICKSON, MICHAEL G | Executive Vice President | Buy | 719 | $141.60 | $101810.40 |
| 2026-02-19 | ERICKSON, MICHAEL G | Executive Vice President | Buy | 483 | $206.94 | $99952.02 |
| 2026-02-19 | ERICKSON, MICHAEL G | Executive Vice President | Buy | 197 | $505.53 | $99589.41 |
| 2026-02-19 | ERICKSON, MICHAEL G | Executive Vice President | Buy | 183 | $544.08 | $99566.64 |
| 2026-02-17 | VANDEBROEK, SOPHIE V. | Director | Sale | 945 | — | — |
| 2026-02-17 | VANDEBROEK, SOPHIE V. | Director | Sale | 945 | $628.65 | $594070.47 |
| 2026-02-17 | VANDEBROEK, SOPHIE V. | Director | Sale | 519 | $628.56 | $326222.64 |
| 2026-02-17 | ERICKSON, MICHAEL G | Executive Vice President | Sale | 4,180 | — | — |
| 2026-02-17 | ERICKSON, MICHAEL G | Executive Vice President | Sale | 1,191 | — | — |
| 2026-02-17 | ERICKSON, MICHAEL G | Executive Vice President | Buy | 4,180 | $178.26 | $745126.80 |
| 2026-02-17 | ERICKSON, MICHAEL G | Executive Vice President | Sale | 2,694 | $628.22 | $1.69M |
| 2026-02-17 | ERICKSON, MICHAEL G | Executive Vice President | Sale | 1,288 | $626.26 | $806618.24 |
| 2026-02-17 | ERICKSON, MICHAEL G | Executive Vice President | Buy | 1,191 | $141.60 | $168645.60 |
| 2026-02-17 | ERICKSON, MICHAEL G | Executive Vice President | Sale | 689 | $629.09 | $433443.42 |
| 2026-02-17 | ERICKSON, MICHAEL G | Executive Vice President | Sale | 456 | $623.76 | $284433.74 |
| 2026-02-17 | ERICKSON, MICHAEL G | Executive Vice President | Sale | 204 | $625.24 | $127549.43 |
| 2026-02-17 | ERICKSON, MICHAEL G | Executive Vice President | Sale | 40 | $629.86 | $25194.50 |
| 2026-02-14 | UNDERBERG, SHARON E. | EVP, GC & Corporate Secretary | Sale | 265 | — | — |
| 2026-02-14 | UNDERBERG, SHARON E. | EVP, GC & Corporate Secretary | Sale | 218 | — | — |
| 2026-02-14 | UNDERBERG, SHARON E. | EVP, GC & Corporate Secretary | Sale | 176 | — | — |
| 2026-02-14 | UNDERBERG, SHARON E. | EVP, GC & Corporate Secretary | Sale | 173 | — | — |
| 2026-02-14 | UNDERBERG, SHARON E. | EVP, GC & Corporate Secretary | Buy | 265 | — | — |
| 2026-02-14 | UNDERBERG, SHARON E. | EVP, GC & Corporate Secretary | Sale | 251 | $629.35 | $157966.85 |
| 2026-02-14 | UNDERBERG, SHARON E. | EVP, GC & Corporate Secretary | Buy | 218 | — | — |
| 2026-02-14 | UNDERBERG, SHARON E. | EVP, GC & Corporate Secretary | Buy | 176 | — | — |
| 2026-02-14 | UNDERBERG, SHARON E. | EVP, GC & Corporate Secretary | Buy | 173 | — | — |
| 2026-02-14 | SMITH, MARTIN ALEXANDER | Executive Vice President | Sale | 367 | — | — |
| 2026-02-14 | SMITH, MARTIN ALEXANDER | Executive Vice President | Sale | 301 | — | — |
| 2026-02-14 | SMITH, MARTIN ALEXANDER | Executive Vice President | Sale | 188 | — | — |
Frequently asked questions
Are IDXX insiders buying or selling?
Over the transactions on record, IDXX insiders have been net sellers, with about $22.84M in stock sold across 54 sales, against 14 open-market purchases.
Does insider selling at IDXX mean the stock will fall?
Not by itself. Most executive selling is pre-scheduled through 10b5-1 plans filed months in advance, and insiders sell for diversification, taxes, and liquidity far more often than out of any view on the price. Insider buying is the stronger signal, especially when several insiders buy around the same time, because there is usually only one reason to put personal cash into the stock.
Which IDXX insiders are selling the most?
Recent selling is concentrated in a few names. MAZELSKY, JONATHAN JAY accounts for the largest share on record, with about $15.34M sold. Selling by one or two individuals matters less than broad selling across the whole leadership team, which is the pattern worth watching.