Insider · CIK 0001688904
Thomas Kempster
Files at DTST (Data Storage Corp). First filing Jan 6, 2025, latest Sep 14, 2026.
In brief
Thomas Kempster files SEC Form 4 as officer, director and 10% owner at DTST (Data Storage Corp). Since Jan 6, 2025, Thomas Kempster has reported 0 open-market buys worth $0 and 5 open-market sells worth $64k, the latest filed on Sep 14, 2026.
A track record needs three past buys with six months of prices behind them; Thomas Kempster has 0, so none is measured yet.
The newest scored trade: sold $10k of DTST on Sep 11, 2026, filed Sep 14, 2026, scored 35 (weak). In the last 12 months: 0 buys worth $0 and 2 sells worth $44k.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
DTST: Data Storage Corp
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 35Weak | Data Storage Corp | $10k 3,500 shares | -16% | - | |
| 36Weak | Data Storage Corp | $34k 6,846 shares | -1% | +68% from low-5% from high | |
| 0Weak | Data Storage Corp | $7,582 2,333 shares | -0% | +12% from low-35% from high | |
| 0Weak | Data Storage Corp | $5,259 1,373 shares | -0% | - | |
| 30Weak | Data Storage Corp | $6,738 1,593 shares | -0% | - |
Transactions
Every row this insider has filed, 24 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 11, 2026 | DTST Data Storage Corp | SOpen-market sale Common Stock | -3,500 | $2.93 | $10k | 18,500 | 29 d ago |
| Sep 2, 2026 | DTST Data Storage Corp | MOption exercise Common Stock | +10,000 | $0.00 | $0 | 10,000 | 39 d ago |
| Sep 2, 2026 | DTST Data Storage Corp | AGrant or award Common Stock | +12,000 | $0.00 | $0 | 22,000 | 39 d ago |
| Sep 2, 2026 | DTST Data Storage Corp | MOption exercise Restricted Stock Unitderivative | -10,000 | $0.00 | $0 | 0 | 39 d ago |
| Jan 29, 2026 | DTST Data Storage Corp | AGrant or award Restricted Stock Unitderivative | +10,000 | $0.00 | $0 | 10,000 | Feb 2, 2026 |
| Jan 14, 2026 | DTST Data Storage Corp | DDisposition to issuer Common Stock | -881,472 | $5.20 | $4.6M | 0 | Jan 16, 2026 |
| Dec 10, 2025 | DTST Data Storage Corp | SOpen-market sale Common Stock | -6,846 | $4.99 | $34k | 871,972 | Dec 12, 2025 |
| Sep 11, 2025 | DTST Data Storage Corp | MOption exercise Common Stock | +4,902 | - | - | 870,484 | Sep 15, 2025 |
| Sep 11, 2025 | DTST Data Storage Corp | MOption exercise Common Stock | +8,334 | - | - | 878,818 | Sep 15, 2025 |
| Sep 11, 2025 | DTST Data Storage Corp | MOption exercise Restricted Stock Unitderivative | -4,902 | $0.00 | $0 | 0 | Sep 15, 2025 |
| Sep 11, 2025 | DTST Data Storage Corp | MOption exercise Restricted Stock Unitderivative | -8,334 | $0.00 | $0 | 0 | Sep 15, 2025 |
| Aug 4, 2025 | DTST Data Storage Corp | MOption exercise Common Stock | +16,666 | $2.00 | $33k | 855,778 | Aug 5, 2025 |
| Aug 4, 2025 | DTST Data Storage Corp | MOption exercise Common Stock | +9,804 | $1.96 | $19k | 865,582 | Aug 5, 2025 |
| Aug 4, 2025 | DTST Data Storage Corp | MOption exercise Stock Optionderivative | -16,666 | $0.00 | $0 | 8,334 | Aug 5, 2025 |
| Aug 4, 2025 | DTST Data Storage Corp | MOption exercise Stock Optionderivative | -9,804 | $0.00 | $0 | 4,902 | Aug 5, 2025 |
| Apr 10, 2025 | DTST Data Storage Corp | MOption exercise Common Stock10b5-1 | +8,333 | - | - | 841,445 | Apr 14, 2025 |
| Apr 10, 2025 | DTST Data Storage Corp | SOpen-market sale Common Stock10b5-1 | -2,333 | $3.25 | $7,582 | 839,112 | Apr 14, 2025 |
| Apr 10, 2025 | DTST Data Storage Corp | MOption exercise Restricted Stock Unitderivative10b5-1 | -8,333 | - | - | 8,334 | Apr 14, 2025 |
| Feb 28, 2025 | DTST Data Storage Corp | MOption exercise Common Stock10b5-1 | +4,902 | - | - | 834,485 | Mar 4, 2025 |
| Mar 3, 2025 | DTST Data Storage Corp | SOpen-market sale Common Stock10b5-1 | -1,373 | $3.83 | $5,259 | 833,112 | Mar 4, 2025 |
| Feb 28, 2025 | DTST Data Storage Corp | MOption exercise Restricted Stock Unitderivative10b5-1 | -4,902 | - | - | 4,902 | Mar 4, 2025 |
| Jan 2, 2025 | DTST Data Storage Corp | SOpen-market sale Common Stock | -1,593 | $4.23 | $6,738 | 829,583 | Jan 6, 2025 |
| Dec 10, 2024 | DTST Data Storage Corp | MOption exercise Common Stock | +2,500 | $2.40 | $6,000 | 831,176 | Dec 12, 2024 |
| Dec 10, 2024 | DTST Data Storage Corp | MOption exercise Stock Optionderivative | -2,500 | $0.00 | $0 | 0 | Dec 12, 2024 |
Questions about Thomas Kempster
Answered from the filings on this page, as of the latest one.
Is Thomas Kempster buying or selling?
In the last 12 months Thomas Kempster reported 0 open-market buys worth $0 and 2 open-market sells worth $44k on SEC Form 4; the latest was sold $10k of DTST on Sep 11, 2026. Grants, option exercises and tax withholding are not counted.
How did Thomas Kempster's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Thomas Kempster has 0.
Where does Thomas Kempster file Form 4?
Thomas Kempster has filed Form 4 at DTST (Data Storage Corp) as EVP. A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.