SZOSTAK M ANNE 4

What Happened
M. Anne Szostak, a director of IDEXX Laboratories (IDXX), had 257 restricted stock units (RSUs) vest and convert into 257 shares on May 7, 2026. The filing shows the shares were acquired at $0.00 (no cash paid) as a conversion/vesting event (transaction code M). There is no indication these shares were sold immediately.

Key Details

• Transaction date: May 7, 2026 (reported on Form 4 filed May 11, 2026). Filing appears timely (filed by the SEC deadline).
• Shares acquired: 257 shares via RSU conversion; reported acquisition price: $0.00 (no cash outlay).
• Shares disposed: the filing shows the derivative conversion entry but no market sale of the resulting shares.
• Shares owned after transaction: not specified in the portion of the filing provided.
• Notable footnotes:
  • F3 confirms each RSU converted to one share and vested in one installment on May 7, 2026.
  • F1–F2 note Szostak’s roles with a trust and a family foundation and that she has a pecuniary interest in shares held by those entities.

Context
This was a routine vesting/conversion of director RSUs (an award being settled in shares), not an open-market purchase or sale. Such vesting events typically create ordinary-income tax consequences for the recipient but do not by themselves signal buying or selling intent in the market.