Jonathan Jay Mazelsky
President & CEO at IDEXX Laboratories Inc.
Sits on 3 boards. Last updated September 28, 2026
Time on boards
- Boards served
- 3
- Current seats
- 3
- Board service
- 8 years
- Director since
- 2023
8 years of board service in total across 3 boards, counting each seat separately. Longest: IDEXX Laboratories Inc., 3 years.
Chief executive roles
Shareholder support
Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
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DENTSPLY SIRONA Inc. June 2, 202698.1%
-
DENTSPLY SIRONA Inc. May 21, 202599.2%
-
DENTSPLY SIRONA Inc. May 22, 202499.1%
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Nov 4, 2026 | IDEXX Laboratories Inc. | Option exercise | +25,140 | $178.26 | $4,481,456 |
| Nov 4, 2026 | IDEXX Laboratories Inc. | Open-market sale | −1,945 | $698.26 | $1,358,121 |
| Nov 4, 2026 | IDEXX Laboratories Inc. | Open-market sale | −4,075 | $699.33 | $2,849,761 |
| Nov 4, 2026 | IDEXX Laboratories Inc. | Open-market sale | −1,667 | $700.33 | $1,167,442 |
| Nov 4, 2026 | IDEXX Laboratories Inc. | Open-market sale | −4,540 | $701.36 | $3,184,158 |
| Nov 4, 2026 | IDEXX Laboratories Inc. | Open-market sale | −2,136 | $702.21 | $1,499,922 |
| Nov 4, 2026 | IDEXX Laboratories Inc. | Open-market sale | −3,950 | $703.45 | $2,778,624 |
| Nov 4, 2026 | IDEXX Laboratories Inc. | Open-market sale | −240 | $705.59 | $169,342 |
| Nov 4, 2026 | IDEXX Laboratories Inc. | Open-market sale | −840 | $707.00 | $593,880 |
| Nov 4, 2026 | IDEXX Laboratories Inc. | Open-market sale | −1,840 | $707.84 | $1,302,434 |
| Nov 4, 2026 | IDEXX Laboratories Inc. | Open-market sale | −1,300 | $709.00 | $921,702 |
| Nov 4, 2026 | IDEXX Laboratories Inc. | Open-market sale | −1,501 | $710.12 | $1,065,891 |
| Nov 4, 2026 | IDEXX Laboratories Inc. | Open-market sale | −775 | $711.31 | $551,264 |
| Nov 4, 2026 | IDEXX Laboratories Inc. | Open-market sale | −331 | $711.95 | $235,655 |
| Sep 30, 2026 | Insulet Corporation | Grant or award | +141 | $130.47 | $18,396 |
Questions about Jonathan Jay Mazelsky
What boards is Jonathan Jay Mazelsky on?
Jonathan Jay Mazelsky sits on the boards of DENTSPLY SIRONA Inc., IDEXX Laboratories Inc. and Insulet Corporation.
What company is Jonathan Jay Mazelsky the CEO of?
Jonathan Jay Mazelsky is President & CEO of IDEXX Laboratories Inc.
How long has Jonathan Jay Mazelsky served on boards?
Our records show at least 8 years of board service across 3 boards, the earliest from 2023.
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