Insiders who reported open-market trades in the last 12 months at the companies Thomas Kempster 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.
Charles M. Piluso - $434K in DTST purchases and sales in the last 12 months
Thomas Kempster is a corporate insider, tracked as Director of Data Storage Corp (DTST). 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 Thomas Kempster submitted recently?
2 primary Form 4 filings in the last 90 days, covering 1 company.
Has Thomas Kempster been buying or selling stock?
Recorded transactions: 0 open-market purchases and 2 open-market sales ($44K) across all tracked filings.
Thomas Kempster is Director of Data Storage Corp (DTST). 8 SEC Form 4 filings on record going back to 2024, most recently on 15 September 2026. Most recent open-market trade: sold $10K of DTST on 15 September 2026. Lifetime open-market sales: $44K.
Recent transactions
10
The latest 10 SEC Form 4 transactions reported by Thomas Kempster.
InsiderAlpha's records for Thomas Kempster go back to 2024: 8 primary Form 4 filings, an average of 2.7 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.