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 |
|---|---|---|---|---|
| MAZELSKY JONATHAN JAY | Director | 83,803.302 | 2026-02-27 | M |
| Hunt Nimrata | Officer | 18,140.944 | 2026-03-03 | S |
| Erickson Michael G | Officer | 15,092.351 | 2026-02-19 | M |
| FENNELL GEORGE | Officer | 10,433 | 2026-06-01 | F |
| Kingsley Lawrence D | Director | 9,568 | 2026-09-04 | S |
| Lane Michael | Officer | 8,023.944 | 2026-02-14 | F |
| Underberg Sharon E. | Officer | 7,137.654 | 2026-03-03 | M |
| Emerson Andrew | Officer | 4,421.444 | 2026-08-20 | F |
| JUNIUS DANIEL M | Director | 3,561 | 2026-05-07 | M |
| Schreck Michael | Officer | 3,088.709 | 2026-02-14 | F |
| Johnson Michael Perkins | Officer | 2,794.687 | 2026-02-14 | F |
| Smith Martin Alexander | Officer | 2,156.659 | 2026-02-14 | F |
| Vandebroek Sophie V. | Director | 905 | 2026-05-07 | M |
| SZOSTAK M ANNE | Director | 519 | 2026-05-07 | M |
| HOOLEY JOSEPH L | Director | 325 | 2026-07-30 | A |
| Peacock Karen | Director | 102 | 2026-05-07 | M |
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.