Thomas Kempster
Insider
First SEC filing: Feb. 19, 2020 · Latest: Feb. 19, 2020
Insider at
Insider transactions
0 buys (P)
2 sells (S)
Net: $-44,382
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Sept. 11, 2026 | DTST | S | 3,500 | $2.92 | $10,220 | 18,500 Direct | -15.91% | Disposed | 13.7% (price as of 2026-10-02) |
| Sept. 2, 2026 | DTST | M | 10,000 | · | · | 10,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Sept. 2, 2026 | DTST | A | 12,000 | · | · | 22,000 Direct | +120.00% | Acquired | (price as of 2026-10-02) |
| Sept. 2, 2026 | DTST | M | 10,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Jan. 29, 2026 | DTST | A | 10,000 | · | · | 10,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 14, 2026 | DTST | D | 881,472 | $5.20 | $4,583,654 | 0 Direct | -100.00% | Disposed | -36.2% (price as of 2026-10-02) |
| Dec. 10, 2025 | DTST | S | 6,846 | $4.99 | $34,162 | 871,972 Direct | -0.78% | Disposed | -33.5% (price as of 2026-10-02) |
| Sept. 11, 2025 | DTST | M | 4,902 | · | · | 870,484 Direct | +0.57% | Acquired | (price as of 2026-10-02) |
| Sept. 11, 2025 | DTST | M | 8,334 | · | · | 878,818 Direct | +0.96% | Acquired | (price as of 2026-10-02) |
| Sept. 11, 2025 | DTST | M | 4,902 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Sept. 11, 2025 | DTST | M | 8,334 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Aug. 4, 2025 | DTST | M | 16,666 | $2.00 | $33,332 | 855,778 Direct | +1.99% | Acquired | 66.0% (price as of 2026-10-02) |
| Aug. 4, 2025 | DTST | M | 9,804 | $1.96 | $19,216 | 865,582 Direct | +1.15% | Acquired | 69.4% (price as of 2026-10-02) |
| Aug. 4, 2025 | DTST | M | 16,666 | · | · | 8,334 Direct | -66.66% | Disposed | (price as of 2026-10-02) |
| Aug. 4, 2025 | DTST | M | 9,804 | · | · | 4,902 Direct | -66.67% | Disposed | (price as of 2026-10-02) |
| April 10, 2025 | DTST | M 10b5-1 | 8,333 | · | · | 841,445 Direct | +1.00% | Acquired | (price as of 2026-10-02) |
| April 10, 2025 | DTST | S 10b5-1 | 2,333 | $3.25 | $7,582 | 839,112 Direct | -0.28% | Disposed | 2.2% (price as of 2026-10-02) |
| April 10, 2025 | DTST | M 10b5-1 | 8,333 | · | · | 8,334 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| March 3, 2025 | DTST | S 10b5-1 | 1,373 | $3.83 | $5,259 | 833,112 Direct | -0.16% | Disposed | -13.3% (price as of 2026-10-02) |
| Feb. 28, 2025 | DTST | M 10b5-1 | 4,902 | · | · | 834,485 Direct | +0.59% | Acquired | (price as of 2026-10-02) |
| Feb. 28, 2025 | DTST | M 10b5-1 | 4,902 | · | · | 4,902 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| Jan. 2, 2025 | DTST | S | 1,593 | $4.23 | $6,738 | 829,583 Direct | -0.19% | Disposed | -21.5% (price as of 2026-10-02) |
| Dec. 10, 2024 | DTST | M | 2,500 | $2.40 | $6,000 | 831,176 Direct | +0.30% | Acquired | 38.3% (price as of 2026-10-02) |
| Dec. 10, 2024 | DTST | M | 2,500 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| April 10, 2024 | DTST | M | 8,333 | · | · | 828,676 Direct | +1.02% | Acquired | (price as of 2026-10-02) |
| April 10, 2024 | DTST | M | 8,333 | · | · | 16,667 Direct | -33.33% | Disposed | (price as of 2026-10-02) |
| Feb. 29, 2024 | DTST | M | 4,902 | · | · | 820,343 Direct | +0.60% | Acquired | (price as of 2026-10-02) |
| Feb. 29, 2024 | DTST | M | 4,902 | · | · | 9,804 Direct | -33.33% | Disposed | (price as of 2026-10-02) |
| Jan. 2, 2024 | DTST | A | 17,065 | · | · | 815,441 Direct | +2.14% | Acquired | (price as of 2026-10-02) |
| Jan. 2, 2024 | DTST | A | 15,528 | · | · | 15,528 Direct | · | Acquired | (price as of 2026-10-02) |
| April 10, 2023 | DTST | A | 25,000 | · | · | 43,873 Direct | +132.46% | Acquired | (price as of 2026-10-02) |
| April 10, 2023 | DTST | A | 25,000 | · | · | 39,706 Direct | +170.00% | Acquired | (price as of 2026-10-02) |
| March 1, 2023 | DTST | A | 14,706 | · | · | 18,873 Direct | +352.92% | Acquired | (price as of 2026-10-02) |
| March 1, 2023 | DTST | A | 14,706 | · | · | 33,579 Direct | +77.92% | Acquired | (price as of 2026-10-02) |
| Feb. 15, 2019 | DTST | S 10b5-1 | 10,000 | $0.17 | $1,700 | 32,314,968 Direct | -0.03% | Disposed | 1852.9% (price as of 2026-10-02) |
| Jan. 18, 2019 | DTST | S 10b5-1 | 10,000 | $0.17 | $1,700 | 32,324,968 Direct | -0.03% | Disposed | 1852.9% (price as of 2026-10-02) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| Sept. 2, 2026 | DTST | Restricted Stock Unit [F1] | Common Stock | $0.00 | · | 10,000 | Disposed |
| Jan. 29, 2026 | DTST | Restricted Stock Unit [F1] | Common Stock | · | · | 10,000 | Acquired |
| Sept. 11, 2025 | DTST | Restricted Stock Unit | Common Stock | · | · | 4,902 | Disposed |
| Sept. 11, 2025 | DTST | Restricted Stock Unit | Common Stock | · | · | 8,334 | Disposed |
| Aug. 4, 2025 | DTST | Stock Option | Common Stock | $2.00 | April 9, 2028 | 16,666 | Disposed |
| Aug. 4, 2025 | DTST | Stock Option | Common Stock | $1.96 | Feb. 28, 2028 | 9,804 | Disposed |
| April 10, 2025 | DTST | Restricted Stock Unit | Common Stock | · | · | 8,333 | Disposed |
| Feb. 28, 2025 | DTST | Restricted Stock Unit | Common Stock | · | · | 4,902 | Disposed |
| Dec. 10, 2024 | DTST | Stock Option | Common Stock | $2.40 | Dec. 10, 2024 | 2,500 | Disposed |
| April 10, 2024 | DTST | Restricted Stock Unit | Common Stock | · | · | 8,333 | Disposed |
| Feb. 29, 2024 | DTST | Restricted Stock Unit | Common Stock | · | · | 4,902 | Disposed |
| Jan. 2, 2024 | DTST | Stock Options [F2] | Common Stock | $3.22 | Jan. 1, 2029 | 15,528 | Acquired |
| April 10, 2023 | DTST | Stock Options [F1] | Common Stock | · | · | 25,000 | Acquired |
| April 10, 2023 | DTST | Restricted Stock Unit [F2] | Common Stock | · | · | 25,000 | Acquired |
| March 1, 2023 | DTST | Stock Options [F1] | Common Stock | · | · | 14,706 | Acquired |
| March 1, 2023 | DTST | Restricted Stock Unit [F2] | Common Stock | · | · | 14,706 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2022 | $174,808 | $25,000 | · | · | · | · | · | $199,808 |
| 2021 | $209,301 | · | · | · | · | · | · | $209,301 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.