Howard Lee
CIK 1379941 · 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
+ 65 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
65 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| June 1, 2023 | AMPH | S | 16,679 | $45.02 | $750,889 | 142,939 Direct | -10.45% | Disposed | -51.7% (price as of 2026-08-19) |
| June 6, 2022 | AMPH | S | 10,291 | $37.79 | $388,897 | 138,776 Direct | -6.90% | Disposed | -42.5% (price as of 2026-08-19) |
| May 23, 2022 | AMPH | S | 10,000 | $34.93 | $349,300 | 138,776 Direct | -6.72% | Disposed | -37.7% (price as of 2026-08-19) |
| June 8, 2021 | AMPH | S | 8,000 | $19.31 | $154,480 | 138,933 Direct | -5.44% | Disposed | 12.6% (price as of 2026-08-19) |
| June 7, 2021 | AMPH | S | 7,827 | $19.28 | $150,905 | 132,914 Direct | -5.56% | Disposed | 12.8% (price as of 2026-08-19) |
| May 20, 2021 | AMPH | S | 10,000 | $19.74 | $197,400 | 132,914 Direct | -7.00% | Disposed | 10.2% (price as of 2026-08-19) |
| May 26, 2020 | AMPH | S | 10,000 | $18.60 | $186,000 | 128,081 Direct | -7.24% | Disposed | 16.9% (price as of 2026-08-19) |
| May 22, 2020 | AMPH | S | 10,000 | $18.36 | $183,600 | 128,081 Direct | -7.24% | Disposed | 18.4% (price as of 2026-08-19) |
| May 21, 2020 | AMPH | S | 10,000 | $18.47 | $184,700 | 128,081 Direct | -7.24% | Disposed | 17.7% (price as of 2026-08-19) |
| May 20, 2020 | AMPH | S | 17,782 | $18.43 | $327,722 | 128,081 Direct | -12.19% | Disposed | 18.0% (price as of 2026-08-19) |
| Dec. 7, 2018 | AMPH | S | 9,278 | $21.89 | $203,095 | 123,381 Direct | -6.99% | Disposed | -0.7% (price as of 2026-08-19) |
| Dec. 6, 2018 | AMPH | S | 5,794 | $21.45 | $124,281 | 123,381 Direct | -4.49% | Disposed | 1.4% (price as of 2026-08-19) |
| Dec. 6, 2018 | AMPH | S | 4,206 | $20.91 | $87,947 | 129,175 Direct | -3.15% | Disposed | 4.0% (price as of 2026-08-19) |
| Dec. 4, 2018 | AMPH | S | 1,011 | $22.55 | $22,798 | 123,381 Direct | -0.81% | Disposed | -3.6% (price as of 2026-08-19) |
| Dec. 4, 2018 | AMPH | S | 8,989 | $21.84 | $196,320 | 124,392 Direct | -6.74% | Disposed | -0.4% (price as of 2026-08-19) |
| Nov. 15, 2016 | AMPH | S | 17,994 | $20.76 | $373,555 | 114,527 Direct | -13.58% | Disposed | 4.7% (price as of 2026-08-19) |
| Nov. 14, 2016 | AMPH | S | 20,000 | $20.56 | $411,200 | 114,527 Direct | -14.87% | Disposed | 5.8% (price as of 2026-08-19) |
| Sept. 1, 2016 | AMPH | S | 10,381 | $18.78 | $194,955 | 114,527 Direct | -8.31% | Disposed | 15.8% (price as of 2026-08-19) |
| Dec. 16, 2015 | AMPH | S | 1,926 | $14.33 | $27,600 | 109,901 Direct | -1.72% | Disposed | 51.7% (price as of 2026-08-19) |
| Dec. 15, 2015 | AMPH | S | 36,536 | $14.34 | $523,926 | 109,901 Direct | -24.95% | Disposed | 51.6% (price as of 2026-08-19) |
| Aug. 25, 2014 | AMPH | P | 6,000 | $10.84 | $65,040 | 101,215 Direct | +6.30% | Acquired | 100.6% (price as of 2026-08-19) |
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 1, 2026 | AMPH | Stock Option (right to buy) | Common Stock (17,365) | $18.42 | June 1, 2036 | 17,365 | Acquired |
| June 5, 2023 | AMPH | Stock Option (right to buy) | Common Stock (7,016) | $46.01 | June 5, 2031 | 7,016 | Acquired |
| June 1, 2023 | AMPH | Stock Option (right to buy) | Common Stock (16,679) | $16.69 | June 7, 2026 | 16,679 | Disposed |
| June 10, 2022 | AMPH | Stock Option (right to buy) | Common Stock (10,984) | $30.02 | June 10, 2030 | 10,984 | Acquired |
| June 6, 2022 | AMPH | Stock Option (right to buy) | Common Stock (10,291) | $17.11 | June 8, 2022 | 10,291 | Disposed |
| May 23, 2022 | AMPH | Stock Option (right to buy) | Common Stock (10,000) | $17.11 | June 8, 2022 | 10,000 | Disposed |
| June 8, 2021 | AMPH | Stock Option (right to buy) | Common Stock (8,000) | $16.43 | June 9, 2021 | 8,000 | Disposed |
| June 7, 2021 | AMPH | Stock Option (right to buy) | Common Stock (17,182) | $19.52 | June 7, 2029 | 17,182 | Acquired |
| June 7, 2021 | AMPH | Stock Option (right to buy) | Common Stock (7,827) | $16.43 | June 9, 2021 | 7,827 | Disposed |
| May 20, 2021 | AMPH | Stock Option (right to buy) | Common Stock (10,000) | $16.43 | June 9, 2021 | 10,000 | Disposed |
| June 8, 2020 | AMPH | Stock Option (right to buy) | Common Stock (16,004) | $20.08 | June 8, 2028 | 16,004 | Acquired |
| May 26, 2020 | AMPH | Stock Option (right to buy) | Common Stock (10,000) | $15.11 | May 27, 2020 | 10,000 | Disposed |
| May 22, 2020 | AMPH | Stock Option (right to buy) | Common Stock (10,000) | $15.11 | May 27, 2020 | 10,000 | Disposed |
| May 21, 2020 | AMPH | Stock Option (right to buy) | Common Stock (10,000) | $15.11 | May 27, 2020 | 10,000 | Disposed |
| May 20, 2020 | AMPH | Stock Option (right to buy) | Common Stock (17,782) | $15.11 | May 27, 2020 | 17,782 | Disposed |
| June 12, 2019 | AMPH | Stock Option (right to buy) | Common Stock (13,915) | $20.03 | June 12, 2027 | 13,915 | Acquired |
| Dec. 7, 2018 | AMPH | Stock Option (right to buy) | Common Stock (9,278) | $14.66 | Dec. 20, 2018 | 9,278 | Disposed |
| Dec. 6, 2018 | AMPH | Stock Option (right to buy) | Common Stock (10,000) | $14.66 | Dec. 20, 2018 | 10,000 | Disposed |
| Dec. 4, 2018 | AMPH | Stock Option (right to buy) | Common Stock (10,000) | $14.66 | Dec. 20, 2018 | 10,000 | 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 |
| Nov. 15, 2016 | AMPH | Stock Option (right to buy) | Common Stock (17,994) | $14.23 | Dec. 10, 2016 | 17,994 | Disposed |
| Nov. 14, 2016 | AMPH | Stock Option (right to buy) | Common Stock (20,000) | $14.23 | Dec. 10, 2016 | 20,000 | Disposed |
| Sept. 1, 2016 | AMPH | Stock Option (right to buy) | Common Stock (10,381) | $15.23 | Oct. 3, 2016 | 10,381 | Disposed |
| June 9, 2016 | AMPH | Stock Option (right to buy) | Common Stock (25,827) | $16.43 | June 9, 2021 | 25,827 | Acquired |
| Dec. 16, 2015 | AMPH | Stock Option (right to buy) | Common Stock (1,926) | $11.68 | Dec. 18, 2015 | 1,926 | Disposed |
| Dec. 15, 2015 | AMPH | Stock Option (right to buy) | Common Stock (36,536) | $11.68 | Dec. 18, 2015 | 36,536 | Disposed |
| 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) 6 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| June 24, 2014 | AMPH | Common Stock | 89,758 | Direct |
| June 24, 2014 | AMPH | Common Stock | — | Direct |
| June 24, 2014 | AMPH | Stock Option (Right to Buy)→ Common Stock (38,462) | 38,462 | Direct |
| June 24, 2014 | AMPH | Stock Option (Right to Buy)→ Common Stock (10,381) | 10,381 | Direct |
| June 24, 2014 | AMPH | Stock Option (Right to Buy)→ Common Stock (37,994) | 37,994 | Direct |
| June 24, 2014 | AMPH | Stock Option (Right to Buy)→ Common Stock (29,278) | 29,278 | Direct |