Insiders who reported open-market trades in the last 12 months at the companies Mark C. Thurmond 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.
Mark C. Thurmond is a corporate insider, tracked as Co-Chief Executive Officer, Director of Tenable Holdings, Inc. (TENB). InsiderAlpha holds 12 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 C. Thurmond submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Mark C. Thurmond been buying or selling stock?
Recorded transactions: 0 open-market purchases and 8 open-market sales ($1.35M) across all tracked filings.
Mark C. Thurmond is Co-Chief Executive Officer, Director of Tenable Holdings, Inc. (TENB). 12 SEC Form 4 filings on record going back to 2024, most recently on 25 August 2026. Lifetime open-market sales: $1.35M.
Recent transactions
20
The latest 20 SEC Form 4 transactions reported by Mark C. Thurmond.
InsiderAlpha's records for Mark C. Thurmond go back to 2024: 12 primary Form 4 filings, an average of 4.0 per year. 4 recorded transactions carry a Rule 10b5-1 plan flag. This identifies the marked transactions as reported under a trading plan; it does not establish the plan status of unmarked transactions.
