Christopher W. Hamm
Insider
First SEC filing: May 4, 2021 · Latest: May 4, 2021
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
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 |
|---|---|---|---|---|---|---|---|---|---|
| July 1, 2026 | AMPY | A | 43,911 | · | · | 43,911 Direct | · | Acquired | (price as of 2026-10-02) |
| July 1, 2026 | AMPY | M | 51,043 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| July 1, 2026 | AMPY | M | 51,043 | · | · | 323,121 Direct | +18.76% | Acquired | (price as of 2026-10-02) |
| July 1, 2025 | AMPY | M | 27,531 | · | · | 272,078 Direct | +11.26% | Acquired | (price as of 2026-10-02) |
| July 1, 2025 | AMPY | M | 27,531 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| July 1, 2025 | AMPY | A | 51,043 | · | · | 51,043 Direct | · | Acquired | (price as of 2026-10-02) |
| June 18, 2025 | AMPY | P | 77,176 | $3.67 | $283,236 | 244,547 Direct | +46.11% | Acquired | 18.8% (price as of 2026-10-02) |
| July 1, 2024 | AMPY | A | 27,531 | · | · | 27,531 Direct | · | Acquired | (price as of 2026-10-02) |
| July 1, 2024 | AMPY | M | 26,708 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| July 1, 2024 | AMPY | M | 26,708 | · | · | 167,371 Direct | +18.99% | Acquired | (price as of 2026-10-02) |
| July 1, 2023 | AMPY | A | 26,708 | · | · | 26,708 Direct | · | Acquired | (price as of 2026-10-02) |
| July 1, 2023 | AMPY | M | 25,045 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| July 1, 2023 | AMPY | M | 25,045 | · | · | 140,663 Direct | +21.66% | Acquired | (price as of 2026-10-02) |
| March 15, 2023 | AMPY | P | 20,000 | $6.65 | $133,000 | 115,618 Direct | +20.92% | Acquired | -34.4% (price as of 2026-10-02) |
| March 14, 2023 | AMPY | P | 20,000 | $7.14 | $142,800 | 95,618 Direct | +26.45% | Acquired | -38.9% (price as of 2026-10-02) |
| Dec. 22, 2022 | AMPY | P | 9,000 | $7.79 | $70,110 | 75,618 Direct | +13.51% | Acquired | -44.0% (price as of 2026-10-02) |
| Dec. 22, 2022 | AMPY | P | 8,000 | $7.50 | $60,000 | 66,618 Direct | +13.65% | Acquired | -41.9% (price as of 2026-10-02) |
| July 1, 2022 | AMPY | A | 25,045 | · | · | 25,045 Direct | · | Acquired | (price as of 2026-10-02) |
| July 1, 2022 | AMPY | M | 42,461 | · | · | 58,618 Direct | +262.80% | Acquired | (price as of 2026-10-02) |
| May 3, 2022 | AMPY | M | 3,333 | · | · | 16,157 Direct | +25.99% | Acquired | (price as of 2026-10-02) |
| July 1, 2021 | AMPY | A | 42,461 | · | · | 55,285 Direct | +331.11% | Acquired | (price as of 2026-10-02) |
| May 4, 2021 | AMPY | M | 2,233 | · | · | 12,824 Direct | +21.08% | Acquired | (price as of 2026-10-02) |
| May 3, 2021 | AMPY | M | 3,332 | · | · | 10,591 Direct | +45.90% | Acquired | (price as of 2026-10-02) |
| May 4, 2020 | AMPY | M | 2,232 | · | · | 5,564 Direct | +66.99% | Acquired | (price as of 2026-10-02) |
| May 4, 2020 | AMPY | M | 1,695 | · | · | 7,259 Direct | +30.46% | Acquired | (price as of 2026-10-02) |
| May 3, 2020 | AMPY | M | 3,332 | · | · | 3,332 Direct | · | Acquired | (price as of 2026-10-02) |
| Dec. 17, 2019 | AMPY | S | 1,304 | $6.82 | $8,893 | 0 Direct | -100.00% | Disposed | -36.1% (price as of 2026-10-02) |
| Sept. 23, 2019 | AMPY | S | 4,316 | $6.61 | $28,529 | 1,304 Direct | -76.80% | Disposed | -34.0% (price as of 2026-10-02) |
| Aug. 6, 2019 | AMPY | A | 16,155 | · | · | 16,155 Direct | · | Acquired | (price as of 2026-10-02) |
| Aug. 6, 2019 | AMPY | A | 5,620 | · | · | 5,620 Direct | · | Acquired | (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 |
|---|---|---|---|---|---|---|---|
| July 1, 2026 | AMPY | Restricted Stock Units | Common Stock | · | · | 43,911 | Acquired |
| July 1, 2026 | AMPY | Restricted Stock Units | Common Stock | · | · | 51,043 | Disposed |
| July 1, 2025 | AMPY | Restricted Stock Units | Common Stock | · | · | 27,531 | Disposed |
| July 1, 2025 | AMPY | Restricted Stock Units | Common Stock | · | · | 51,043 | Acquired |
| July 1, 2024 | AMPY | Restricted Stock Units | Common Stock | · | · | 27,531 | Acquired |
| July 1, 2024 | AMPY | Restricted Stock Units | Common Stock | · | · | 26,708 | Disposed |
| July 1, 2023 | AMPY | Restricted Stock Units | Common Stock | · | · | 26,708 | Acquired |
| July 1, 2023 | AMPY | Restricted Stock Units | Common Stock | · | · | 25,045 | Disposed |
| July 1, 2022 | AMPY | Restricted Stock Units | Common Stock | · | · | 25,045 | Acquired |
| Aug. 6, 2019 | AMPY | Restricted Stock Units | Common Stock | · | · | 16,155 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).