Summary
Updated Aug 30, 2026
Thomas Kempster is Director of Data Storage Corp (DTST). 6 SEC Form 4 filings on record going back to 2024, most recently on 2 February 2026. Most recent open-market trade: sold $34K of DTST on 13 December 2025. Lifetime open-market sales: $34K.
Recent Transactions
7Every recent SEC Form 4 transaction Thomas Kempster has reported, most recent first.
Other Insiders Active in the Same Stocks
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 of DTST open-market activity in the last 12 months
- Christos Panagiotakos - $55K of DTST 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 Thomas Kempster?
Thomas Kempster is a corporate insider, tracked as Director of Data Storage Corp (DTST). InsiderAlpha holds 6 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Thomas Kempster last file a Form 4?
The most recent primary Form 4 on record is dated 2 February 2026, one of 6 filings going back to 2024.
Has Thomas Kempster been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($34K) across all tracked filings.
Where can I see all of Thomas Kempster'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.
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