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 in SEMR purchases and sales in the last 12 months
Oleg Shchegolev - $2.39M in SEMR purchases and sales in the last 12 months
Andrew Warden - $487K in SEMR purchases and sales in the last 12 months
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.
David W. Mason is Chief Legal Officer of SEMrush Holdings, Inc. (SEMR). 7 SEC Form 4 filings on record going back to 2024, most recently on 29 April 2026. Most recent open-market trade: sold $1.16M of SEMR on 9 March 2026. Lifetime open-market sales: $1.18M.
Recent transactions
7
The latest 7 SEC Form 4 transactions reported by David W. Mason.
InsiderAlpha's records for David W. Mason go back to 2024: 7 primary Form 4 filings, an average of 2.3 per year. No recorded transaction carries a Rule 10b5-1 plan flag. An absent flag does not establish whether a transaction was pre-arranged or discretionary.
