| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| MAZELSKY JONATHAN JAY | President and CEO, Director | ONE IDEXX DRIVE, WESTBROOK | /s/ Lily J. Lu, Attorney-in-Fact for Jonathan Jay Mazelsky | 02 Mar 2026 | 0001556270 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | IDXX | Common Stock | Options Exercise | $3,302,962 | +23,326 | +28% | $141.60 | 106,932 | 26 Feb 2026 | Direct | |
| transaction | IDXX | Common Stock | Sale | $833,508 | -1,281 | -1.2% | $650.67 | 105,651 | 26 Feb 2026 | Direct | F1 |
| transaction | IDXX | Common Stock | Sale | $713,378 | -1,095 | -1% | $651.49 | 104,556 | 26 Feb 2026 | Direct | F2 |
| transaction | IDXX | Common Stock | Sale | $1,089,013 | -1,669 | -1.6% | $652.49 | 102,887 | 26 Feb 2026 | Direct | F3 |
| transaction | IDXX | Common Stock | Sale | $765,455 | -1,171 | -1.1% | $653.68 | 101,716 | 26 Feb 2026 | Direct | F4 |
| transaction | IDXX | Common Stock | Sale | $727,293 | -1,111 | -1.1% | $654.63 | 100,605 | 26 Feb 2026 | Direct | F5 |
| transaction | IDXX | Common Stock | Sale | $975,905 | -1,488 | -1.5% | $655.85 | 99,117 | 26 Feb 2026 | Direct | F6 |
| transaction | IDXX | Common Stock | Sale | $882,143 | -1,343 | -1.4% | $656.85 | 97,774 | 26 Feb 2026 | Direct | F7 |
| transaction | IDXX | Common Stock | Sale | $1,881,433 | -2,860 | -2.9% | $657.84 | 94,914 | 26 Feb 2026 | Direct | F8 |
| transaction | IDXX | Common Stock | Sale | $2,411,635 | -3,660 | -3.9% | $658.92 | 91,254 | 26 Feb 2026 | Direct | F9 |
| transaction | IDXX | Common Stock | Sale | $1,886,224 | -2,859 | -3.1% | $659.75 | 88,395 | 26 Feb 2026 | Direct | F10 |
| transaction | IDXX | Common Stock | Sale | $793,317 | -1,200 | -1.4% | $661.10 | 87,195 | 26 Feb 2026 | Direct | F11 |
| transaction | IDXX | Common Stock | Sale | $662,157 | -1,000 | -1.1% | $662.16 | 86,195 | 26 Feb 2026 | Direct | F12 |
| transaction | IDXX | Common Stock | Sale | $1,716,621 | -2,589 | -3% | $663.04 | 83,606 | 26 Feb 2026 | Direct | F13 |
| transaction | IDXX | Common Stock | Options Exercise | $99,589 | +197 | +0.24% | $505.53 | 83,803 | 27 Feb 2026 | Direct |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | IDXX | Non-Qualified Stock Option (right-to-buy) | Options Exercise | $0 | -23,326 | -100% | $0.000000 | 0 | 26 Feb 2026 | Common Stock | 23,326 | $141.60 | Direct | F14 |
| transaction | IDXX | Incentive Stock Option (right-to-buy) | Options Exercise | $0 | -197 | -100% | $0.000000 | 0 | 27 Feb 2026 | Common Stock | 197 | $505.53 | Direct | F15 |
| Id | Content |
|---|---|
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| F14 | Grant of option to buy shares of Issuer common stock that vested in five annual installments beginning February 14, 2018. |
| F15 | Grant of option to buy shares of Issuer common stock that vested on February 14, 2026. |