FENNELL GEORGE 4

What Happened

• George Fennell, Executive Vice President of IDEXX Laboratories (IDXX), had 639 restricted stock units (RSUs) vest and convert to common shares on June 1, 2026. The RSUs were recorded as acquired at $0.00 (vesting).
• To satisfy tax withholding, 284 of those vested shares were surrendered/withheld at a price of $566.79 per share, generating proceeds of $160,968 (reported as a disposition under code F). The net shares retained from this vesting are 355 (639 vested − 284 withheld). The filing was submitted on June 2, 2026 (timely).

Key Details

• Transaction date: June 1, 2026 (filed June 2, 2026)
• Acquired: 639 shares via RSU vesting (code M — conversion/exercise of derivative)
• Withheld/Disposed for taxes: 284 shares at $566.79 each, totaling $160,968 (code F)
• Net shares retained from this vesting: 355 (639 − 284)
• Footnote: F1 — Each RSU represents one share and vested in one installment on June 1, 2026. F2 — Not applicable.
• Shares owned after the transaction: total holdings not reported in this Form 4.

Context

• This is a compensation-related vesting event (RSUs converting to shares) with shares withheld to cover tax obligations — a routine insider transaction and not an open-market buy/sell signaling a personal investment decision.
• Transaction codes: M = exercise/conversion of derivative (in this case RSU settlement to shares); F = tax withholding for the related award.