Summary
Updated Aug 31, 2026
M. Anne Szostak is Director of IDEXX LABORATORIES INC /DE (IDXX). 4 SEC Form 4 filings on record going back to 2025, most recently on 11 May 2026. Most recent open-market trade: sold $1.42M of IDXX on 22 August 2025. Lifetime open-market sales: $2.60M.
Recent Transactions
9Every recent SEC Form 4 transaction M. Anne Szostak has reported, most recent first.
Trading Pattern
InsiderAlpha's records for M. Anne Szostak go back to 2025: 4 primary Form 4 filings, an average of 2.0 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies M. Anne Szostak files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Jonathan Jay Mazelsky - $15.34M of IDXX open-market activity in the last 12 months
- Nimrata Hunt - $9.53M of IDXX open-market activity in the last 12 months
- George Fennell - $7.34M of IDXX open-market activity in the last 12 months
- Michael G. Erickson - $3.37M of IDXX open-market activity in the last 12 months
- Sophie V. Vandebroek - $920K of IDXX open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is M. Anne Szostak?
M. Anne Szostak is a corporate insider, tracked as Director of IDEXX LABORATORIES INC /DE (IDXX). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did M. Anne Szostak last file a Form 4?
The most recent primary Form 4 on record is dated 11 May 2026, one of 4 filings going back to 2025.
Has M. Anne Szostak been buying or selling stock?
Recorded transactions: 0 open-market purchases and 3 open-market sales ($2.60M) across all tracked filings.
Where can I see all of M. Anne Szostak's SEC 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.
Learn More
Follow M. Anne Szostak and every insider like them
A free account opens the full scored daily plan and every past day, a watchlist for any ticker, and 3 months of price history on every company page. No card.
Free plan available · Paid plans start with a 7-day free trial