Insiders who reported open-market trades in the last 12 months at the companies Mark Lawrence Plaumann 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 Lawrence Plaumann is a corporate insider, tracked as Director of MAMMOTH ENERGY SERVICES, INC. (TUSK). InsiderAlpha holds 8 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 Lawrence Plaumann submitted recently?
2 primary Form 4 filings in the last 90 days, covering 2 companies.
Has Mark Lawrence Plaumann been buying or selling stock?
Recorded transactions: 1 open-market purchase ($15K) and 4 open-market sales ($560K) across all tracked filings.
Mark Lawrence Plaumann is Director of MAMMOTH ENERGY SERVICES, INC. (TUSK). 8 SEC Form 4 filings on record going back to 2024, most recently on 17 September 2026. Most recent open-market trade: bought $15K of TUSK on 17 September 2026. Lifetime open-market purchases: $15K. Lifetime open-market sales: $560K.
Recent transactions
12
The latest 12 SEC Form 4 transactions reported by Mark Lawrence Plaumann.
InsiderAlpha's records for Mark Lawrence Plaumann go back to 2024: 8 primary Form 4 filings, an average of 2.7 per year. The typical open-market purchase is $15K (1 buy totaling $15K). The largest single buy on record is $15K of TUSK in 2026. Sales side: 4 recorded sales totaling $560K, so the filing history runs sell-heavy by dollar value. No recorded transaction carries a Rule 10b5-1 plan flag. An absent flag does not establish whether a transaction was pre-arranged or discretionary.
