Thomas Kempster
CIK: 0001688904
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
Data Storage Corp
Discretionary Trading P&L
Holdings
Transaction History (16 total)
- Sep 11, 2026DTST
Data Storage Corp
Sale(S)Direct3.5K shares at avg. $2.92$10K - Sep 2, 2026DTST
Data Storage Corp
Exercise(M)Direct10K shares- - Sep 2, 2026DTST
Data Storage Corp
Award(A)Direct12K shares- - Jan 29, 2026DTST
Data Storage Corp
Award(A)DirectRestricted Stock Unit
10K shares- - Jan 14, 2026DTST
Data Storage Corp
Disposition(D)Direct881.5K shares at avg. $5.20$4.6M - Dec 10, 2025DTST
Data Storage Corp
Sale(S)Direct6.8K shares at avg. $4.99$34K - Sep 11, 2025DTST
Data Storage Corp
Exercise(M)Direct4.9K shares- - Sep 11, 2025DTST
Data Storage Corp
Exercise(M)Direct8.3K shares- - Aug 4, 2025DTST
Data Storage Corp
Exercise(M)Direct16.7K shares at avg. $2.00$33K - Aug 4, 2025DTST
Data Storage Corp
Exercise(M)Direct9.8K shares at avg. $1.96$19K - Apr 10, 2025DTST
Data Storage Corp
Exercise(M)Direct8.3K shares- - Apr 10, 2025DTST
Data Storage Corp
Sale(S)Direct2.3K shares at avg. $3.25$8K - Mar 3, 2025DTST
Data Storage Corp
Sale(S)Direct1.4K shares at avg. $3.83$5K - Feb 28, 2025DTST
Data Storage Corp
Exercise(M)Direct4.9K shares- - Jan 2, 2025DTST
Data Storage Corp
Sale(S)Direct1.6K shares at avg. $4.23$7K - Dec 10, 2024DTST
Data Storage Corp
Exercise(M)Direct2.5K shares at avg. $2.40$6K
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Sep 11, 2026 | DTST Data Storage Corp | Sale(S) | 3,500 | $2.92 | $10,238 | Direct |
| Sep 2, 2026 | DTST Data Storage Corp | Exercise(M) | 10,000 | - | $0 | Direct |
| Sep 2, 2026 | DTST Data Storage Corp | Award(A) | 12,000 | - | $0 | Direct |
| Jan 29, 2026 | DTST Data Storage Corp | Award(A) Restricted Stock Unit | 10,000 | - | - | Direct |
| Jan 14, 2026 | DTST Data Storage Corp | Disposition(D) | 881,472 | $5.20 | $4,583,654 | Direct |
| Dec 10, 2025 | DTST Data Storage Corp | Sale(S) | 6,846 | $4.99 | $34,185 | Direct |
| Sep 11, 2025 | DTST Data Storage Corp | Exercise(M) | 4,902 | - | - | Direct |
| Sep 11, 2025 | DTST Data Storage Corp | Exercise(M) | 8,334 | - | - | Direct |
| Aug 4, 2025 | DTST Data Storage Corp | Exercise(M) | 16,666 | $2.00 | $33,332 | Direct |
| Aug 4, 2025 | DTST Data Storage Corp | Exercise(M) | 9,804 | $1.96 | $19,216 | Direct |
| Apr 10, 2025 | DTST Data Storage Corp | Exercise(M) | 8,333 | - | - | Direct |
| Apr 10, 2025 | DTST Data Storage Corp | Sale(S) | 2,333 | $3.25 | $7,582 | Direct |
| Mar 3, 2025 | DTST Data Storage Corp | Sale(S) | 1,373 | $3.83 | $5,259 | Direct |
| Feb 28, 2025 | DTST Data Storage Corp | Exercise(M) | 4,902 | - | - | Direct |
| Jan 2, 2025 | DTST Data Storage Corp | Sale(S) | 1,593 | $4.23 | $6,738 | Direct |
| Dec 10, 2024 | DTST Data Storage Corp | Exercise(M) | 2,500 | $2.40 | $6,000 | Direct |
1-16 of 16 transactions
About Kempster Thomas
Kempster Thomas (SEC CIK 0001688904) files insider reports with the SEC as Director of Data Storage Corp (DTST).
Signal8 holds 11 ownership filings by Kempster Thomas, all Form 4s, filed between Dec 12, 2024 and Sep 14, 2026. Those filings report 16 transactions, from Dec 10, 2024 to Sep 11, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on Kempster Thomas's filings is in NEW YORK, NY.
Recent filings by Kempster Thomas
- Sep 11, 2026: Open-market sale of DTST shares (Form 4, code S).
- Sep 2, 2026: Option exercise of DTST shares (Form 4, code M).
- Sep 2, 2026: Grant or award of DTST shares (Form 4, code A).
- Jan 29, 2026: Grant or award of DTST derivative securities (Form 4, code A).
- Jan 14, 2026: Disposition to issuer transaction of DTST shares (Form 4, code D).
Other insiders filing for Data Storage Corp (DTST)
- Argen John, Director
- Stein Clifford, Director
- Mitchell Uwayne A., Director
- Correll Todd A., Director
- Schwartz Harold J, Director
- Stallone Nancy, Director