Updated Jul 16, 2026
MAZELSKY JONATHAN JAY has filed 5 SEC Form 4 filings across 2 companies in the last 90 days — active on both sides. Lifetime open-market purchases: $101K. Lifetime open-market sales: $33.83M.
Jonathan Jay Mazelsky is the President and CEO of Dentsply Sirona Inc., a leading manufacturer of dental equipment and supplies. He has also served as a director for IDEXX Laboratories Inc., contributing to the strategic direction of both companies.
| Role | Director |
|---|---|
| Notability | 50/100 |
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-07-02 | PODD | INSULET CORP | A — Grant or award | 1.4K | $0.00 | |
| 2026-06-18 | XRAY | DENTSPLY SIRONA Inc. | P — Open-market purchase | 10.0K | $10.14 | $101K |
| 2026-06-15 | XRAY | DENTSPLY SIRONA Inc. | A — Grant or award | 10.0K | $10.14 | $101K |
| 2026-06-05 | XRAY | DENTSPLY SIRONA Inc. | A — Grant or award | 22.8K | $0.00 | |
| 2026-03-02 | IDXX | IDEXX LABORATORIES INC /DE | M — Option exercise | 197 | $505.53 | $100K |
| 2026-03-02 | IDXX | IDEXX LABORATORIES INC /DE | S — Open-market sale | 2.6K | $663.04 | $1.72M |
| 2026-03-02 | IDXX | IDEXX LABORATORIES INC /DE | S — Open-market sale | 1.0K | $662.16 | $662K |
| 2026-03-02 | IDXX | IDEXX LABORATORIES INC /DE | S — Open-market sale | 1.2K | $661.10 | $793K |
| 2026-03-02 | IDXX | IDEXX LABORATORIES INC /DE | S — Open-market sale | 2.9K | $659.75 | $1.89M |
| 2026-03-02 | IDXX | IDEXX LABORATORIES INC /DE | S — Open-market sale | 3.7K | $658.92 | $2.41M |
| 2026-03-02 | IDXX | IDEXX LABORATORIES INC /DE | S — Open-market sale | 2.9K | $657.84 | $1.88M |
| 2026-03-02 | IDXX | IDEXX LABORATORIES INC /DE | S — Open-market sale | 1.3K | $656.85 | $882K |
| 2026-03-02 | IDXX | IDEXX LABORATORIES INC /DE | S — Open-market sale | 1.5K | $655.85 | $976K |
| 2026-03-02 | IDXX | IDEXX LABORATORIES INC /DE | S — Open-market sale | 1.1K | $654.63 | $727K |
| 2026-03-02 | IDXX | IDEXX LABORATORIES INC /DE | S — Open-market sale | 1.2K | $653.68 | $765K |
| 2026-03-02 | IDXX | IDEXX LABORATORIES INC /DE | S — Open-market sale | 1.7K | $652.49 | $1.09M |
| 2026-03-02 | IDXX | IDEXX LABORATORIES INC /DE | S — Open-market sale | 1.1K | $651.49 | $713K |
| 2026-03-02 | IDXX | IDEXX LABORATORIES INC /DE | S — Open-market sale | 1.3K | $650.67 | $834K |
| 2026-03-02 | IDXX | IDEXX LABORATORIES INC /DE | M — Option exercise | 23.3K | $141.60 | $3.30M |
| 2026-02-18 | IDXX | IDEXX LABORATORIES INC /DE | F — Tax withholding / forfeiture | 915 | $629.35 | $576K |
Jonathan Jay Mazelsky is the President and CEO of Dentsply Sirona Inc., a leading manufacturer of dental equipment and supplies. He has also served as a director for IDEXX Laboratories Inc., contributing to the strategic direction of both companies.…
5 primary Form 4 filings in the last 90 days, covering 2 companies.
Recorded transactions: 1 open-market purchases ($101K) and 23 open-market sales ($33.83M) across all tracked filings.
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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