Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies David W. Mason 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.
- Eugenie Levin - $4.81M of SEMR open-market activity in the last 12 months
- Oleg Shchegolev - $2.39M of SEMR open-market activity in the last 12 months
- Andrew Warden - $487K of SEMR open-market activity in the last 12 months
- Dmitry Melnikov - $10K of SEMR 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 David W. Mason?
David W. Mason is a corporate insider, tracked as Chief Legal Officer of SEMrush Holdings, Inc. (SEMR). InsiderAlpha holds 7 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did David W. Mason last file a Form 4?
The most recent primary Form 4 on record is dated 29 April 2026, one of 7 filings going back to 2024.
Has David W. Mason been buying or selling stock?
Recorded transactions: 0 open-market purchases and 2 open-market sales ($1.18M) across all tracked filings.
Where can I see all of David W. Mason'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 David W. Mason 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
