Summary
Updated Aug 31, 2026
Mark Zagorski is Chief Executive Officer, Director of DoubleVerify Holdings, Inc. (DV). 13 SEC Form 4 filings on record going back to 2024, most recently on 1 July 2026. Lifetime open-market purchases: $11K.
Recent Transactions
20Every recent SEC Form 4 transaction Mark Zagorski has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Mark Zagorski go back to 2024: 13 primary Form 4 filings, an average of 4.3 per year. The typical open-market purchase is $11K (1 buy totaling $11K). The largest single buy on record is $11K of DV in 2024. 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 Mark Zagorski 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.
- Providence VII U.S. Holdings L.P. - $524K of DV open-market activity in the last 12 months
- Andrew E. Grimmig - $153K of DV open-market activity in the last 12 months
- Lucy Stamell Dobrin - $93K of DV 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 Mark Zagorski?
Mark Zagorski is a corporate insider, tracked as Chief Executive Officer, Director of DoubleVerify Holdings, Inc. (DV). InsiderAlpha holds 13 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Mark Zagorski submitted recently?
3 primary Form 4 filings in the last 90 days, covering 1 company.
Has Mark Zagorski been buying or selling stock?
Recorded transactions: 1 open-market purchase ($11K) and 0 open-market sales across all tracked filings.
Where can I see all of Mark Zagorski'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.
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