Jonathan Jay Mazelsky Net Worth
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Jonathan Jay Mazelsky has an estimated net worth of at least $101.5 million*, as of Oct. 29, 2025. They own 83,803 shares of IDXX stock. They have sold 114,868 shares of IDXX stock since 2021, for an estimated $49.6 million.
Jonathan Jay Mazelsky $IDXX SEC Form 4 Insider Trading
Jonathan Jay Mazelsky has filed a total of 49 insider trades in $IDXX since 2021. Their most recent trade was a sale of 1,171 shares, made on Feb 26, 2026. Their largest trade was a sale of 13,424 shares, made on Aug 31, 2023. We estimate that they now own 83,803 shares of $IDXX, worth an estimated $51.9 million.
Insider Trading at $IDXX
There have been a total of 224 insider trades reported at $IDXX since 2021, with 0 shares purchased and 425,600 shares sold. The most active insider traders in $IDXX stock have been Jonathan Jay Mazelsky, Michael Lane, and James F Polewaczyk. The most recent trade was a sale of 1,171 shares reported by JONATHAN JAY MAZELSKY (President and CEO), made on Feb 26, 2026.
History of Insider Stock Trades by Jonathan Jay Mazelsky
| Company Ticker | Purchase / Sale | Shares | Date | Disclosed (EST) |
|---|---|---|---|---|
IDXX
|
Sale | 1,171 | Feb 26, 2026 | March 2, 2026, 6 p.m. |
IDXX
|
Sale | 1,111 | Feb 26, 2026 | March 2, 2026, 6 p.m. |
IDXX
|
Sale | 1,488 | Feb 26, 2026 | March 2, 2026, 6 p.m. |
IDXX
|
Sale | 1,343 | Feb 26, 2026 | March 2, 2026, 6 p.m. |
IDXX
|
Sale | 2,860 | Feb 26, 2026 | March 2, 2026, 6 p.m. |
IDXX
|
Sale | 3,660 | Feb 26, 2026 | March 2, 2026, 6 p.m. |
IDXX
|
Sale | 2,859 | Feb 26, 2026 | March 2, 2026, 6 p.m. |
IDXX
|
Sale | 1,200 | Feb 26, 2026 | March 2, 2026, 6 p.m. |
IDXX
|
Sale | 1,000 | Feb 26, 2026 | March 2, 2026, 6 p.m. |
IDXX
|
Sale | 2,589 | Feb 26, 2026 | March 2, 2026, 6 p.m. |
IDXX
|
Sale | 1,281 | Feb 26, 2026 | March 2, 2026, 6 p.m. |
IDXX
|
Sale | 1,095 | Feb 26, 2026 | March 2, 2026, 6 p.m. |
IDXX
|
Sale | 1,669 | Feb 26, 2026 | March 2, 2026, 6 p.m. |
IDXX
|
Sale | 1,095 | Aug 06, 2025 | Aug. 8, 2025, 8:38 p.m. |
IDXX
|
Sale | 1,525 | Aug 06, 2025 | Aug. 8, 2025, 8:38 p.m. |
IDXX
|
Sale | 3,397 | Aug 06, 2025 | Aug. 8, 2025, 8:38 p.m. |
IDXX
|
Sale | 6,056 | Aug 06, 2025 | Aug. 8, 2025, 8:38 p.m. |
IDXX
|
Sale | 7,299 | Aug 06, 2025 | Aug. 8, 2025, 8:38 p.m. |
IDXX
|
Sale | 3,000 | Aug 06, 2025 | Aug. 8, 2025, 8:38 p.m. |
IDXX
|
Sale | 3,526 | Aug 06, 2025 | Aug. 8, 2025, 8:38 p.m. |
IDXX
|
Sale | 1,822 | Aug 06, 2025 | Aug. 8, 2025, 8:38 p.m. |
IDXX
|
Sale | 880 | Aug 06, 2025 | Aug. 8, 2025, 8:38 p.m. |
IDXX
|
Sale | 660 | Aug 06, 2025 | Aug. 8, 2025, 8:38 p.m. |
IDXX
|
Sale | 705 | Feb 07, 2024 | Feb. 9, 2024, 6 p.m. |
IDXX
|
Sale | 1,353 | Feb 07, 2024 | Feb. 9, 2024, 6 p.m. |
IDXX
|
Sale | 462 | Feb 07, 2024 | Feb. 9, 2024, 6 p.m. |
IDXX
|
Sale | 4,124 | Feb 07, 2024 | Feb. 9, 2024, 6 p.m. |
IDXX
|
Sale | 5,356 | Feb 07, 2024 | Feb. 9, 2024, 6 p.m. |
IDXX
|
Sale | 5,804 | Dec 04, 2023 | Dec. 6, 2023, 6:01 p.m. |
IDXX
|
Sale | 1,324 | Dec 04, 2023 | Dec. 6, 2023, 6:01 p.m. |
IDXX
|
Sale | 13,424 | Aug 31, 2023 | Sept. 5, 2023, 5:01 p.m. |
IDXX
|
Sale | 972 | Nov 14, 2022 | Nov. 16, 2022, 6 p.m. |
IDXX
|
Sale | 6,385 | Nov 14, 2022 | Nov. 16, 2022, 6 p.m. |
IDXX
|
Sale | 2,543 | Nov 14, 2022 | Nov. 16, 2022, 6 p.m. |
IDXX
|
Sale | 600 | Nov 14, 2022 | Nov. 16, 2022, 6 p.m. |
IDXX
|
Sale | 3,018 | Nov 07, 2022 | Nov. 9, 2022, 6 p.m. |
IDXX
|
Sale | 392 | Nov 07, 2022 | Nov. 9, 2022, 6 p.m. |
IDXX
|
Sale | 900 | Nov 07, 2022 | Nov. 9, 2022, 6 p.m. |
IDXX
|
Sale | 2,000 | Nov 07, 2022 | Nov. 9, 2022, 6 p.m. |
IDXX
|
Sale | 500 | Nov 07, 2022 | Nov. 9, 2022, 6 p.m. |
IDXX
|
Sale | 3,704 | Nov 07, 2022 | Nov. 9, 2022, 6 p.m. |
IDXX
|
Sale | 2,716 | Nov 07, 2022 | Nov. 9, 2022, 6 p.m. |
IDXX
|
Sale | 182 | Aug 16, 2021 | Aug. 16, 2021, 8 p.m. |
IDXX
|
Sale | 3,417 | Aug 13, 2021 | Aug. 16, 2021, 8 p.m. |
IDXX
|
Sale | 488 | Aug 16, 2021 | Aug. 16, 2021, 8 p.m. |
IDXX
|
Sale | 533 | Aug 16, 2021 | Aug. 16, 2021, 8 p.m. |
IDXX
|
Sale | 337 | Aug 13, 2021 | Aug. 16, 2021, 8 p.m. |
IDXX
|
Sale | 983 | Aug 13, 2021 | Aug. 16, 2021, 8 p.m. |
IDXX
|
Sale | 60 | Aug 16, 2021 | Aug. 16, 2021, 8 p.m. |
$IDXX Executives and Stock Owners with Insider Trades
-
Jonathan Jay Mazelsky, President and CEO
-
Michael Lane, Executive Vice President
-
James F Polewaczyk, Executive Vice President
-
Brian P Mckeon, Executive VP & CFO
-
Jonathan Jay Mazelsky, President & CEO
-
Nimrata Hunt, Executive Vice President
-
Brian P Mckeon, EVP, CFO and Treasurer
-
George Fennell, Executive Vice President
-
Kathy V Turner, Senior Vice President
-
Michael G Erickson, Executive Vice President
-
George Fennell, SVP, Chief Revenue Officer
-
Giovani Twigge, Senior Vice President
-
Sharon E. Underberg, EVP, GC & Corporate Secretary
*This is only based off of information found in SEC filings, and may not reflect actual net worth. There may also be inaccuracies due to privately holdings filing errors, parsing errors, accidental double-counting of shares, incorrect classification of indirectly owned shares, sales prior to dataset start date, or any other number of issues.