SEC Form 4 · Updated Daily
IDXX
— IDEXX LABORATORIES, INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| AYERS JONATHAN W | Director | 419,574 | 2024-09-06 | G |
| MAZELSKY JONATHAN JAY | Director | 106,932.302 | 2026-02-26 | M |
| Dupree Thomas J | Officer | 91,919 | 2011-02-17 | M |
| Williams Michael J PhD | Officer | 59,113 | 2016-08-11 | M |
| FRATONI S SAM | Officer | 51,156 | 2008-10-28 | M |
| MURRAY ROBERT J | Director | 36,347 | 2015-05-06 | M |
| MCKEON BRIAN P | Director | 32,118.59 | 2025-02-14 | M |
| END WILLIAM T | Director | 31,786 | 2018-05-10 | S |
| NAQUI ALI | Officer | 30,474 | 2013-05-09 | M |
| RAINES MERILEE | Director | 26,577 | 2013-02-25 | M |
| POWERS JOHNNY D | Officer | 26,441 | 2015-12-05 | M |
| GOODSPEED WILLIAM B. | Officer | 26,425 | 2011-04-26 | M |
| HULSY ROBERT S | Officer | 26,232 | 2007-03-16 | M |
| CRAIG THOMAS | Director | 24,471 | 2017-04-28 | A |
| TONELLI QUENTIN J | Officer | 23,583 | 2007-05-23 | M |
| TWIGGE GIOVANI | Officer | 20,329.48 | 2022-02-23 | M |
| WALLEN WILLIAM C | Officer | 20,057 | 2010-02-14 | M |
| POLEWACZYK JAMES F | Officer | 18,815.23 | 2024-03-06 | M |
| Hunt Nimrata | Officer | 18,140.944 | 2026-03-03 | S |
| Erickson Michael G | Officer | 18,064.351 | 2026-02-17 | M |
| HENDERSON REBECCA M | Director | 17,742 | 2021-02-23 | M |
| BROWN WILLIAM E III | Officer | 17,731 | 2013-02-14 | M |
| JOHNSON BARRY C | Director | 13,484 | 2016-08-15 | M |
| Kingsley Lawrence D | Director | 11,771 | 2026-09-04 | M |
| FENNELL GEORGE | Officer | 10,717 | 2026-06-01 | M |
| Turner Kathy V | Director | 8,379.85 | 2023-02-15 | A |
| DEADY CONAN R | Officer | 8,255 | 2013-03-05 | M |
| Lane Michael | Officer | 8,244.944 | 2026-02-14 | M |
| DESOUZA ERROL B | Director | 7,276 | 2009-04-30 | A |
| Underberg Sharon E. | Officer | 7,137.654 | 2026-03-03 | M |
| Studer Jacqueline | Officer | 6,918 | 2019-02-25 | M |
| Emerson Andrew | Officer | 4,507.444 | 2026-08-20 | M |
| Meyaard Daniel V | Officer | 4,416 | 2013-02-14 | M |
| Schreck Michael | Officer | 3,964.709 | 2026-02-14 | M |
| JUNIUS DANIEL M | Director | 3,561 | 2026-05-07 | M |
| VUMBACCO JOSEPH V | Director | 3,560 | 2012-08-09 | M |
| Johnson Michael Perkins | Officer | 2,972.687 | 2026-02-14 | M |
| Smith Martin Alexander | Officer | 2,458.659 | 2026-02-14 | M |
| ESSIG STUART | Director · Officer | 2,236 | 2025-05-06 | M |
| BLANCHE WILLARD R JR | Officer | 1,698 | 2013-05-10 | — |
| Kerr Irene C | Officer | 1,432 | 2008-02-14 | M |
| Vandebroek Sophie V. | Director | 905 | 2026-05-07 | M |
| Fiarman Jeffrey | Officer | 886 | 2014-06-01 | M |
| COLLINS Asha | Director | 779 | 2024-05-06 | M |
| SZOSTAK M ANNE | Director | 519 | 2026-05-07 | M |
| HOOLEY JOSEPH L | Director | 325 | 2026-07-30 | A |
| Britt Irene Chang | Director | 208 | 2024-05-06 | M |
| Claflin Bruce L. | Director | 161 | 2024-05-17 | S |
| Peacock Karen | Director | 102 | 2026-05-07 | M |
| CHADBOURNE JEFFERY D | Officer | 36 | 2013-05-10 | — |
| SAMAD SAM | Officer | 0 | 2019-07-16 | — |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-09-04 | Kingsley Lawrence D | Option exercise (derivative) | 2,203 | — | 0 |
| 2026-09-04 | Kingsley Lawrence D | Open-market sale | 2,203 | $532.08 | 9,568 |
| 2026-09-04 | Kingsley Lawrence D | Option exercise | 2,203 | $114.17 | 11,771 |
| 2026-08-20 | Emerson Andrew | Option exercise (derivative) | 265 | — | 925 |
| 2026-08-20 | Emerson Andrew | Tax withholding | 86 | $0.00 | 4,421.444 |
| 2026-08-20 | Emerson Andrew | Option exercise | 265 | $178.26 | 4,507.444 |
| 2026-07-30 | HOOLEY JOSEPH L | Grant / award | 49 | $558.80 | 325 |
| 2026-06-01 | FENNELL GEORGE | Option exercise (derivative) | 639 | — | 0 |
| 2026-06-01 | FENNELL GEORGE | Tax withholding | 284 | $566.79 | 10,433 |
| 2026-06-01 | FENNELL GEORGE | Option exercise | 639 | $0.00 | 10,717 |
| 2026-05-12 | Britt Irene Chang | Grant / award (derivative) | 234 | $0.00 | 753 |
| 2026-05-12 | Britt Irene Chang | Grant / award (derivative) | 525 | $0.00 | 525 |
| 2026-05-12 | Claflin Bruce L. | Grant / award (derivative) | 234 | $0.00 | 1,354 |
| 2026-05-12 | Claflin Bruce L. | Grant / award (derivative) | 525 | $0.00 | 525 |
| 2026-05-12 | ESSIG STUART | Grant / award (derivative) | 234 | $0.00 | 234 |
| 2026-05-12 | ESSIG STUART | Grant / award (derivative) | 525 | $0.00 | 525 |
| 2026-05-12 | HOOLEY JOSEPH L | Grant / award (derivative) | 234 | $0.00 | 234 |
| 2026-05-12 | HOOLEY JOSEPH L | Grant / award (derivative) | 525 | $0.00 | 525 |
| 2026-05-12 | JUNIUS DANIEL M | Grant / award (derivative) | 234 | $0.00 | 234 |
| 2026-05-12 | JUNIUS DANIEL M | Grant / award (derivative) | 525 | $0.00 | 525 |
| 2026-05-12 | Kingsley Lawrence D | Grant / award (derivative) | 75 | $0.00 | 75 |
| 2026-05-12 | Kingsley Lawrence D | Grant / award (derivative) | 234 | $0.00 | 234 |
| 2026-05-12 | Kingsley Lawrence D | Grant / award (derivative) | 168 | $0.00 | 168 |
| 2026-05-12 | Kingsley Lawrence D | Grant / award (derivative) | 525 | $0.00 | 525 |
| 2026-05-12 | Peacock Karen | Grant / award (derivative) | 234 | $0.00 | 234 |
| 2026-05-12 | Peacock Karen | Grant / award (derivative) | 525 | $0.00 | 525 |
| 2026-05-12 | SAMAD SAM | Grant / award (derivative) | 234 | $0.00 | 1,354 |
| 2026-05-12 | SAMAD SAM | Grant / award (derivative) | 525 | $0.00 | 525 |
| 2026-05-12 | Vandebroek Sophie V. | Grant / award (derivative) | 234 | $0.00 | 234 |
| 2026-05-12 | Vandebroek Sophie V. | Grant / award (derivative) | 525 | $0.00 | 525 |
| 2026-05-07 | HOOLEY JOSEPH L | Option exercise (derivative) | 158 | — | 0 |
| 2026-05-07 | HOOLEY JOSEPH L | Option exercise | 158 | $0.00 | 276 |
| 2026-05-07 | JUNIUS DANIEL M | Option exercise (derivative) | 257 | — | 0 |
| 2026-05-07 | JUNIUS DANIEL M | Option exercise | 257 | $0.00 | 3,561 |
| 2026-05-07 | Kingsley Lawrence D | Option exercise (derivative) | 257 | — | 0 |
| 2026-05-07 | Kingsley Lawrence D | Option exercise | 82 | $0.00 | 9,568 |
| 2026-05-07 | Kingsley Lawrence D | Option exercise | 257 | $0.00 | 9,486 |
| 2026-05-07 | Peacock Karen | Option exercise (derivative) | 101 | — | 0 |
| 2026-05-07 | Peacock Karen | Option exercise | 101 | $0.00 | 102 |
| 2026-05-07 | SZOSTAK M ANNE | Option exercise (derivative) | 257 | — | 0 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.