Jonathan Jay Mazelsky serves as Executive at IDEXX LABORATORIES INC /DE, where they oversee executive responsibilities. Since joining the company, Jonathan Jay Mazelsky has executed 135 insider transactions totaling $61.7M, demonstrating a bearish approach to their equity position. Their most recent transaction on Oct 10, 2025 involved receiving (via award) 359.58 shares valued at $0.
Jonathan Jay Mazelsky currently holds 28,451.38 shares of IDEXX LABORATORIES INC /DE (IDXX), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Jonathan Jay Mazelsky has been a net seller of IDXX stock. They have purchased $0 and sold $61.7M worth of shares.
Jonathan Jay Mazelsky's most recent insider trade was on Oct 10, 2025, when they sold 359.58 shares at $0.00 per share.
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| $N/A |
| Discretionary |
| Aug 8, 2025 | IDXX | $109.5K | Option Exercise | 183 | $598.49 | Discretionary |
| Aug 6, 2025 | IDXX | $4.6M | Sale | 7,299 | $631.61 | Discretionary |
| Aug 6, 2025 | IDXX | $560.4K | Sale | 880 | $636.81 | Discretionary |
| Aug 6, 2025 | IDXX | $1.2M | Sale | 1,822 | $636.15 | Discretionary |
| Aug 6, 2025 | IDXX | $2.2M | Sale | 3,526 | $635.13 | Discretionary |
| Aug 6, 2025 | IDXX | $1.9M | Sale | 3,000 | $632.56 | Discretionary |
| Aug 6, 2025 | IDXX | $422.0K | Sale | 660 | $639.37 | Discretionary |
| Aug 6, 2025 | IDXX | $3.8M | Sale | 6,056 | $630.59 | Discretionary |
| Aug 6, 2025 | IDXX | $2.1M | Sale | 3,397 | $629.82 | Discretionary |
| Aug 6, 2025 | IDXX | $958.1K | Sale | 1,525 | $628.27 | Discretionary |
| Aug 6, 2025 | IDXX | $686.5K | Sale | 1,095 | $626.90 | Discretionary |
| Aug 6, 2025 | IDXX | $2.0M | Option Exercise | 29,260 | $67.85 | Discretionary |
| Jul 11, 2025 | XRAY | $0 | Award | 279.35 | $N/A | Discretionary |
| Aug 5, 2024 | IDXX | $0 | Option Exercise | 384 | $N/A | Discretionary |
| Aug 5, 2024 | IDXX | $77.4K | Payment | 170 | $455.08 | Discretionary |
| Jul 12, 2024 | XRAY | $0 | Award | 86.73 | $N/A | Discretionary |
| May 23, 2024 | XRAY | $0 | Award | 7,994 | $N/A | Discretionary |
| Apr 12, 2024 | XRAY | $0 | Award | 26.43 | $N/A | Discretionary |
| Feb 29, 2024 | IDXX | $0 | Gift | 550 | $N/A | Discretionary |
| Feb 21, 2024 | IDXX | $100.0K | Option Exercise | 483 | $206.94 | Discretionary |
| Feb 14, 2024 | IDXX | $1.0M | Payment | 1,839 | $560.56 | Discretionary |
| Feb 14, 2024 | IDXX | $0 | Option Exercise | 435 | $N/A | Discretionary |
| Feb 14, 2024 | IDXX | $0 | Option Exercise | 974 | $N/A | Discretionary |
| Feb 14, 2024 | IDXX | $0 | Option Exercise | 689 | $N/A | Discretionary |
| Feb 14, 2024 | IDXX | $0 | Option Exercise | 958 | $N/A | Discretionary |
| Feb 14, 2024 | IDXX | $0 | Option Exercise | 1,100 | $N/A | Discretionary |
| Feb 7, 2024 | IDXX | $2.4M | Sale | 4,124 | $572.53 | Discretionary |
| Feb 7, 2024 | IDXX | $814.2K | Option Exercise | 12,000 | $67.85 | Discretionary |