Richard Koo
CIK 1611219 · View on SEC EDGAR ↗
Insider
First SEC filing: June 24, 2014 · Latest: June 24, 2014
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 20 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
20 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| June 1, 2021 | AMPH | S | 25,827 | $19.28 | $497,945 | 253,270 Direct | -9.25% | Disposed | 10.9% (price as of 2026-08-20) |
| May 27, 2020 | AMPH | S | 47,782 | $18.18 | $868,677 | 247,419 Direct | -16.19% | Disposed | 17.6% (price as of 2026-08-20) |
| Dec. 11, 2018 | AMPH | S | 29,278 | $21.32 | $624,207 | 241,928 Direct | -10.80% | Disposed | 0.3% (price as of 2026-08-20) |
| Aug. 15, 2014 | AMPH | P | 4,900 | $10.08 | $49,392 | 214,722 Direct | +2.34% | Acquired | 112.1% (price as of 2026-08-20) |
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 (17,182) | $19.52 | June 7, 2029 | 17,182 | Acquired |
| June 1, 2021 | AMPH | Stock Option (right to buy) | Common Stock (25,827) | $16.43 | June 9, 2021 | 25,827 | Disposed |
| June 8, 2020 | AMPH | Stock Option (right to buy) | Common Stock (16,004) | $20.08 | June 8, 2028 | 16,004 | Acquired |
| May 27, 2020 | AMPH | Stock Option (right to buy) | Common Stock (47,782) | $15.11 | May 27, 2020 | 47,782 | Disposed |
| June 12, 2019 | AMPH | Stock Option (right to buy) | Common Stock (13,915) | $20.03 | June 12, 2027 | 13,915 | Acquired |
| Dec. 11, 2018 | AMPH | Stock Option (right to buy) | Common Stock (29,278) | $14.66 | Dec. 20, 2018 | 29,278 | Disposed |
| June 7, 2018 | AMPH | Stock Option (right to buy) | Common Stock (16,679) | $16.69 | June 7, 2026 | 16,679 | Acquired |
| June 8, 2017 | AMPH | Stock Option (right to buy) | Common Stock (20,291) | $17.11 | June 8, 2022 | 20,291 | Acquired |
| June 9, 2016 | AMPH | Stock Option (right to buy) | Common Stock (25,827) | $16.43 | June 9, 2021 | 25,827 | Acquired |
| May 27, 2015 | AMPH | Stock Option (right to buy) | Common Stock (47,782) | $15.11 | May 27, 2020 | 47,782 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 4 holdings
Securities held when first becoming an insider, per SEC Form 3.