Form 4 for IDXX Idexx Laboratories
Accepted 2026-03-02 00:00:00 ET · period of report 2026-02-26 · accession 0000874716-26-000043 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DM | 2026-03-02 | 2026-02-26 | IDXX | MAZELSKY JONATHAN JAY | Pres, CEO, Dir | S - Sale+OE | $657.55 | -23.3K | 91.3K | -20% | -$15.34M |
| DM | 2026-03-02 | 2026-02-26+ | IDXX | MAZELSKY JONATHAN JAY | Pres, CEO, Dir | M - OptEx | $144.65 | +23.5K | 83.8K | +39% | +$3.40M |
| DM | 2026-03-02 | 2026-02-26+ | IDXX | MAZELSKY JONATHAN JAY | Pres, CEO, Dir | M - OptEx | $0.00 | -23.5K | 0 | -100% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-02-26 | S | D | 2,860 | $657.84 | 94,914.30 | D | — | — | (F8) Represents the weighted average price of the shares sold ranging from a low of $657.305 to a high of $658.275 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price. |
| 2 | Common | Common Stock | 2026-02-26 | S | D | 1,095 | $651.49 | 104,556.30 | D | — | — | (F2) Represents the weighted average price of the shares sold ranging from a low of $651.06 to a high of $651.85 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price. |
| 3 | Common | Common Stock | 2026-02-26 | S | D | 1,281 | $650.67 | 105,651.30 | D | — | — | (F1) Represents the weighted average price of the shares sold ranging from a low of $650.00 to a high of $650.96 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price. |
| 4 | Common | Common Stock | 2026-02-26 | M | A | 23,326 | $141.60 | 106,932.30 | D | — | — | |
| 5 | Common | Common Stock | 2026-02-27 | M | A | 197 | $505.53 | 83,803.30 | D | — | — | |
| 6 | Common | Common Stock | 2026-02-26 | S | D | 2,589 | $663.04 | 83,606.30 | D | — | — | (F13) Represents the weighted average price of the shares sold ranging from a low of $662.72 to a high of $663.505 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price. |
| 7 | Common | Common Stock | 2026-02-26 | S | D | 1,000 | $662.16 | 86,195.30 | D | — | — | (F12) Represents the weighted average price of the shares sold ranging from a low of $661.65 to a high of $662.55 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price. |
| 8 | Common | Common Stock | 2026-02-26 | S | D | 1,200 | $661.10 | 87,195.30 | D | — | — | (F11) Represents the weighted average price of the shares sold ranging from a low of $660.59 to a high of $661.55 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price. |
| 9 | Common | Common Stock | 2026-02-26 | S | D | 2,859 | $659.75 | 88,395.30 | D | — | — | (F10) Represents the weighted average price of the shares sold ranging from a low of $659.31 to a high of $660.275 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price. |
| 10 | Common | Common Stock | 2026-02-26 | S | D | 1,669 | $652.49 | 102,887.30 | D | — | — | (F3) Represents the weighted average price of the shares sold ranging from a low of $652.105 to a high of $653.06 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price. |
| 11 | Common | Common Stock | 2026-02-26 | S | D | 1,171 | $653.68 | 101,716.30 | D | — | — | (F4) Represents the weighted average price of the shares sold ranging from a low of $653.19 to a high of $654.155 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price. |
| 12 | Common | Common Stock | 2026-02-26 | S | D | 1,111 | $654.63 | 100,605.30 | D | — | — | (F5) Represents the weighted average price of the shares sold ranging from a low of $654.24 to a high of $655.2175 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price. |
| 13 | Common | Common Stock | 2026-02-26 | S | D | 1,488 | $655.85 | 99,117.30 | D | — | — | (F6) Represents the weighted average price of the shares sold ranging from a low of $655.275 to a high of $656.205 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price. |
| 14 | Common | Common Stock | 2026-02-26 | S | D | 1,343 | $656.85 | 97,774.30 | D | — | — | (F7) Represents the weighted average price of the shares sold ranging from a low of $656.28 to a high of $657.27 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price. |
| 15 | Common | Common Stock | 2026-02-26 | S | D | 3,660 | $658.92 | 91,254.30 | D | — | — | (F9) Represents the weighted average price of the shares sold ranging from a low of $658.30 to a high of $659.24 per share. The undersigned undertakes, upon request by the Commission staff, the issuer or a security holder of the issuer, to provide full information regarding the number of shares purchased at each separate price. |
| 16 | Derivative | Incentive Stock Option (right-to-buy) | 2026-02-27 | M | D | 197 | $0.00 | 0 | D | $505.53 · — to 2032-02-13 | 197 Common Stock | (F15) Grant of option to buy shares of Issuer common stock that vested on February 14, 2026. |
| 17 | Derivative | Non-Qualified Stock Option (right-to-buy) | 2026-02-26 | M | D | 23,326 | $0.00 | 0 | D | $141.60 · — to 2027-02-13 | 23,326 Common Stock | (F14) Grant of option to buy shares of Issuer common stock that vested in five annual installments beginning February 14, 2018. |