David Maris
Insider
First SEC filing: June 9, 2020 · Latest: June 9, 2020
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 |
|---|---|---|---|---|---|---|---|---|---|
| June 7, 2021 | AMPH | A | 17,182 | · | · | 17,182 Direct | · | Acquired | (price as of 2026-10-02) |
| June 7, 2021 | AMPH | A | 6,019 | · | · | 19,170 Direct | +45.77% | Acquired | (price as of 2026-10-02) |
| Aug. 14, 2020 | AMPH | P | 1,000 | $20.26 | $20,260 | 13,151 Direct | +8.23% | Acquired | 25.5% (price as of 2026-10-02) |
| June 8, 2020 | AMPH | A | 16,004 | · | · | 16,004 Direct | · | Acquired | (price as of 2026-10-02) |
| June 8, 2020 | AMPH | A | 5,851 | · | · | 12,151 Direct | +92.87% | 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 |
|---|---|---|---|---|---|---|---|
| June 7, 2021 | AMPH | Stock Option (right to buy) | Common Stock | $19.52 | June 7, 2029 | 17,182 | Acquired |
| June 8, 2020 | AMPH | Stock Option (right to buy) | Common Stock | $20.08 | June 8, 2028 | 16,004 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| June 9, 2020 | AMPH | Common Stock | 6,300 | Direct |