Jonathan Jay Mazelsky insider trades: Idexx Laboratories (IDXX) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Jonathan reports to the SEC
Open-market buys and sales
14 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Nov 4, 2026 | IDXX | ↓ Sell | 25,140 | $703.19 | $17.7M | Direct | Nov 5, 2026 (1d) |
| Jun 12, 2026 | XRAY | ↑ Buy | 10,000 | $10.14 | $101K | Direct | Jun 18, 2026 (6d) |
| Feb 26, 2026 | IDXX | ↓ Sell | 23,326 | $657.55 | $15.3M | Direct | Mar 2, 2026 (4d) |
| Aug 6, 2025 | IDXX | ↓ Sell | 29,260 | $631.98 | $18.5M | Direct | Aug 8, 2025 (2d) |
| Feb 7, 2024 | IDXX | ↓ Sell | 12,000 | $572.61 | $6.9M | Direct | Feb 9, 2024 (2d) |
| Dec 4, 2023 | IDXX | ↓ Sell | 7,128 | $513.05 | $3.7M | Direct | Dec 6, 2023 (2d) |
| Aug 31, 2023 | IDXX | ↓ Sell | 13,424 | $512.01 | $6.9M | Direct | Sep 5, 2023 (5d) |
| Nov 14, 2022 | IDXX | ↓ Sell | 10,500 | $434.47 | $4.6M | Direct | Nov 16, 2022 (2d) |
| Nov 7, 2022 | IDXX | ↓ Sell | 13,230 | $382.49 | $5.1M | Direct | Nov 9, 2022 (2d) |
| Aug 16, 2021 | IDXX | ↓ Sell | 6,000 | $675.21 | $4.1M | Direct | Aug 17, 2021 (1d) |
| Feb 17, 2021 | IDXX | ↓ Sell | 13,868 | $537.21 | $7.4M | Direct | Feb 19, 2021 (2d) |
| Nov 5, 2020 | IDXX | ↓ Sell | 5,206 | $469.31 | $2.4M | Direct | Nov 9, 2020 (4d) |
| Feb 5, 2020 | IDXX | ↓ Sell10b5-1 | 8,000 | $277.84 | $2.2M | Direct | Feb 7, 2020 (2d) |
| Aug 5, 2019 | IDXX | ↓ Sell | 10,000 | $258.40 | $2.6M | Direct | Aug 7, 2019 (2d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other IDXX insiders
Open-market trades in the last 12 months
About Jonathan Jay Mazelsky's insider trades
Jonathan Jay Mazelsky is Executive Chair of the Board at Idexx Laboratories (IDXX). Since Aug 5, 2019, Jonathan has reported 1 open-market purchase worth $101K and 13 sales worth $97.3M on SEC Form 4. In the last 12 months: 1 buy ($101K) and 2 sales ($33.0M).
1 sale (2% of the value sold) was made under a Rule 10b5-1 trading plan, which is set up months in advance and runs on a schedule, so it says little about how the insider sees the stock today.
Their filings also include option exercises (50 filings), grants and awards (46 filings), shares withheld for taxes (28 filings), gifts (6 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every IDXX insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.