IDXX · Insider Trading
Idexx Laboratories Inc
Every open-market purchase and sale reported by IDXX officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-09 | Lawrence D Kingsley | Director | MIXED | — | −$920.66K |
| 2026-08-24 | Andrew Emerson | EVP, CFO and Treasurer | MIXED | +179 | +$47.24K |
| 2026-08-03 | Joseph L Hooley | Director | A | +49 | +$27.38K |
| 2026-06-02 | George Fennell | Executive Vice President | MIXED | +355 | −$160.97K |
| 2026-05-14 | Irene Chang Britt | Director | A | +759 deriv. | — |
| 2026-05-14 | Bruce L. Claflin | Director | A | +759 deriv. | — |
| 2026-05-14 | Stuart Essig | Director | A | +759 deriv. | — |
| 2026-05-14 | Joseph L Hooley | Director | A | +759 deriv. | — |
| 2026-05-14 | Daniel M Junius | Director | A | +759 deriv. | — |
| 2026-05-14 | Lawrence D Kingsley | Director | A | +1,002 deriv. | — |
| 2026-05-14 | Karen Peacock | Director | A | +759 deriv. | — |
| 2026-05-14 | Sam Samad | Director | A | +759 deriv. | — |
| 2026-05-14 | Sophie V. Vandebroek | Director | A | +759 deriv. | — |
| 2026-05-11 | Joseph L Hooley | Director | M | +158 | — |
| 2026-05-11 | Daniel M Junius | Director | M | +257 | — |
| 2026-05-11 | Lawrence D Kingsley | Director | M | +339 | — |
| 2026-05-11 | Karen Peacock | Director | M | +101 | — |
| 2026-05-11 | M Anne Szostak | Director | M | +257 | — |
| 2026-05-11 | Sophie V. Vandebroek | Director | M | +257 | — |
| 2026-05-04 | Joseph L Hooley | Director | A | +43 | +$24.11K |
| 2026-03-05 | Nimrata Hunt | Executive Vice President | Sell | −1,758 | −$1.12M |
| 2026-03-05 | Sharon E. Underberg | EVP, GC & Corporate Secretary | M | +197 | +$99.59K |
| 2026-03-03 | Michael G Erickson | Executive Vice President | A | — | — |
| 2026-03-02 | Jonathan Jay Mazelsky | President and CEO | MIXED | +197 | −$11.94M |
| 2026-02-27 | Nimrata Hunt | Executive Vice President | Sell | −2,693 | −$1.78M |
| 2026-02-19 | Sophie V. Vandebroek | Director | MIXED | −519 | −$604.76K |
| 2026-02-19 | Michael G Erickson | Executive Vice President | MIXED | +2,399 | −$1.91M |
| 2026-02-17 | Andrew Emerson | EVP, CFO and Treasurer | MIXED | +333 | −$77.41K |
| 2026-02-17 | Michael G Erickson | Executive Vice President | MIXED | +1,389 | −$612.99K |
| 2026-02-17 | George Fennell | Executive Vice President | MIXED | +255 | −$125.24K |
| 2026-02-17 | Nimrata Hunt | Executive Vice President | MIXED | +1,433 | −$726.27K |
| 2026-02-17 | Michael Perkins Johnson | Executive Vice President | MIXED | +395 | −$112.02K |
| 2026-02-17 | Michael Lane | Executive Vice President | MIXED | +871 | −$139.09K |
| 2026-02-17 | Jonathan Jay Mazelsky | President and CEO | MIXED | +1,142 | −$575.86K |
| 2026-02-17 | Michael Schreck | Executive Vice President | MIXED | +1,083 | −$551.31K |
| 2026-02-17 | Martin Alexander Smith | Executive Vice President | MIXED | +702 | −$190.06K |
| 2026-02-17 | Sharon E. Underberg | EVP, GC & Corporate Secretary | MIXED | +581 | −$157.97K |
| 2026-02-11 | George Fennell | Executive Vice President | MIXED | +1,476 | −$6.47M |
| 2026-02-03 | Joseph L Hooley | Director | A | +36 | +$24.14K |
| 2025-12-03 | Karen Peacock | Director | A | +332 deriv. | — |
| 2025-11-10 | Nimrata Hunt | Executive Vice President | MIXED | +3,105 | −$1.84M |
| 2025-11-03 | Joseph L Hooley | Director | A | +39 | +$24.51K |
| 2025-09-04 | Jonathan Jay Mazelsky | President and CEO | G | −1,051 | — |
| 2025-09-03 | Joseph L Hooley | Director | A | +522 deriv. | — |
| 2025-09-03 | Martin Alexander Smith | Executive Vice President | MIXED | +13 | −$3.24K |
| 2025-08-26 | M Anne Szostak | Director | MIXED | — | −$963.82K |
| 2025-08-14 | Michael G Erickson | Executive Vice President | Sell | −405 | −$263.81K |
| 2025-08-13 | Nimrata Hunt | Executive Vice President | MIXED | +26 | −$488.50K |
| 2025-08-12 | Jonathan Jay Mazelsky | President and CEO | M | +183 | +$109.52K |
| 2025-08-12 | Sharon E. Underberg | EVP, GC & Corporate Secretary | MIXED | +183 | −$2.32M |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Jonathan Jay Mazelsky | President and CEO | 104,556 | $58.59M |
| Brian P McKeon | EVP, CFO and Treasurer | 49,599 | $27.79M |
| Nimrata Hunt | Executive Vice President | 18,300 | $10.26M |
| Michael G Erickson | Executive Vice President | 15,092 | $8.46M |
| George Fennell | Executive Vice President | 10,433 | $5.85M |
| Lawrence D Kingsley | Director | 9,568 | $5.36M |
| Sophie V. Vandebroek | Director | 9,078 | $5.09M |
| Michael Lane | Executive Vice President | 8,168 | $4.58M |
| Sharon E. Underberg | EVP, GC & Corporate Secretary | 7,137 | $4.00M |
| Andrew Emerson | EVP, CFO and Treasurer | 4,507 | $2.53M |
| Daniel M Junius | Director | 3,561 | $2.00M |
| Michael Perkins Johnson | Executive Vice President | 2,972 | $1.67M |
| Michael Schreck | Executive Vice President | 2,592 | $1.45M |
| Stuart Essig | Director | 2,236 | $1.25M |
| Martin Alexander Smith | Executive Vice President | 2,156 | $1.21M |
| Bruce L. Claflin | Director | 1,721 | $964.38K |
| M Anne Szostak | Director | 778 | $435.96K |
| Joseph L Hooley | Director | 325 | $182.12K |
| Irene Chang Britt | Director | 208 | $116.55K |
| Karen Peacock | Director | 102 | $57.16K |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the IDXX quote page; the site-wide leaderboard is on the insider transactions hub.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.