Jonathan Jay Mazelsky

Sits on 3 boards. Last updated September 27, 2026

Time on boards

Boards served
3
Current seats
3
Board service
7 years
Director since
2023

7 years of board service in total across 3 boards, counting each seat separately. Longest: IDEXX Laboratories Inc., 3 years.

IDEXX Laboratories Inc. Director ยท President and CEO
3 years ยท Since 2023
3 years ยท Since 2023
2 months ยท Since 2026

Chief executive roles

IDEXX Laboratories Inc. ยท President and CEO
Dates unknown

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
Jul 1, 2026 Insulet Corporation Grant or award +1,355 โ€” โ€”
Jun 12, 2026 DENTSPLY SIRONA Inc. Grant or award +10,000 $10.14 $101,400
Jun 3, 2026 DENTSPLY SIRONA Inc. Grant or award +22,822 โ€” โ€”
Feb 27, 2026 IDEXX Laboratories Inc. Option exercise +197 $505.53 $99,589
Feb 26, 2026 IDEXX Laboratories Inc. Option exercise +23,326 $141.60 $3,302,962
Feb 26, 2026 IDEXX Laboratories Inc. Open-market sale โˆ’1,281 $650.67 $833,508
Feb 26, 2026 IDEXX Laboratories Inc. Open-market sale โˆ’1,095 $651.49 $713,382
Feb 26, 2026 IDEXX Laboratories Inc. Open-market sale โˆ’1,669 $652.49 $1,089,006
Feb 26, 2026 IDEXX Laboratories Inc. Open-market sale โˆ’1,171 $653.68 $765,459
Feb 26, 2026 IDEXX Laboratories Inc. Open-market sale โˆ’1,111 $654.63 $727,294
Feb 26, 2026 IDEXX Laboratories Inc. Open-market sale โˆ’1,488 $655.85 $975,905
Feb 26, 2026 IDEXX Laboratories Inc. Open-market sale โˆ’1,343 $656.85 $882,150
Feb 26, 2026 IDEXX Laboratories Inc. Open-market sale โˆ’2,860 $657.84 $1,881,422
Feb 26, 2026 IDEXX Laboratories Inc. Open-market sale โˆ’3,660 $658.92 $2,411,647
Feb 26, 2026 IDEXX Laboratories Inc. Open-market sale โˆ’2,859 $659.75 $1,886,225

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