Howard Lee
Insider
First SEC filing: June 24, 2014 · Latest: June 24, 2014
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 2, 2026 | AMPH | F | 769 | $18.45 | $14,188 | 159,350 Direct | -0.48% | Disposed | 37.8% (price as of 2026-10-02) |
| June 1, 2026 | AMPH | A | 17,365 | · | · | 17,365 Direct | · | Acquired | (price as of 2026-10-02) |
| June 1, 2026 | AMPH | A | 8,143 | · | · | 160,119 Direct | +5.36% | Acquired | (price as of 2026-10-02) |
| June 3, 2025 | AMPH | F | 923 | $26.01 | $24,007 | 151,976 Direct | -0.60% | Disposed | -2.2% (price as of 2026-10-02) |
| June 2, 2025 | AMPH | A | 5,122 | · | · | 152,899 Direct | +3.47% | Acquired | (price as of 2026-10-02) |
| June 2, 2025 | AMPH | A | 11,402 | · | · | 11,402 Direct | · | Acquired | (price as of 2026-10-02) |
| June 5, 2024 | AMPH | F | 579 | $42.04 | $24,341 | 147,777 Direct | -0.39% | Disposed | -39.5% (price as of 2026-10-02) |
| June 3, 2024 | AMPH | A | 3,076 | · | · | 148,356 Direct | +2.12% | Acquired | (price as of 2026-10-02) |
| June 3, 2024 | AMPH | A | 6,864 | · | · | 6,864 Direct | · | Acquired | (price as of 2026-10-02) |
| June 10, 2023 | AMPH | F | 375 | $45.67 | $17,126 | 145,280 Direct | -0.26% | Disposed | -44.3% (price as of 2026-10-02) |
| June 5, 2023 | AMPH | A | 7,016 | · | · | 7,016 Direct | · | Acquired | (price as of 2026-10-02) |
| June 5, 2023 | AMPH | A | 2,716 | · | · | 145,655 Direct | +1.90% | Acquired | (price as of 2026-10-02) |
| June 1, 2023 | AMPH | M | 16,679 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| June 1, 2023 | AMPH | S | 16,679 | $45.02 | $750,889 | 142,939 Direct | -10.45% | Disposed | -43.5% (price as of 2026-10-02) |
| June 1, 2023 | AMPH | M | 16,679 | $16.69 | $278,373 | 159,618 Direct | +11.67% | Acquired | 52.4% (price as of 2026-10-02) |
| June 10, 2022 | AMPH | A | 10,984 | · | · | 10,984 Direct | · | Acquired | (price as of 2026-10-02) |
| June 10, 2022 | AMPH | A | 4,163 | · | · | 142,939 Direct | +3.00% | Acquired | (price as of 2026-10-02) |
| June 6, 2022 | AMPH | M | 10,291 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| June 6, 2022 | AMPH | S | 10,291 | $37.79 | $388,897 | 138,776 Direct | -6.90% | Disposed | -32.7% (price as of 2026-10-02) |
| June 6, 2022 | AMPH | M | 10,291 | $17.11 | $176,079 | 149,067 Direct | +7.42% | Acquired | 48.6% (price as of 2026-10-02) |
| May 23, 2022 | AMPH | M | 10,000 | · | · | 10,291 Direct | -49.28% | Disposed | (price as of 2026-10-02) |
| May 23, 2022 | AMPH | S | 10,000 | $34.93 | $349,300 | 138,776 Direct | -6.72% | Disposed | -27.2% (price as of 2026-10-02) |
| May 23, 2022 | AMPH | M | 10,000 | $17.11 | $171,100 | 148,776 Direct | +7.21% | Acquired | 48.6% (price as of 2026-10-02) |
| June 12, 2021 | AMPH | F | 157 | $19.92 | $3,127 | 138,776 Direct | -0.11% | Disposed | 27.7% (price as of 2026-10-02) |
| June 8, 2021 | AMPH | D | 8,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| June 8, 2021 | AMPH | S | 8,000 | $19.31 | $154,480 | 138,933 Direct | -5.44% | Disposed | 31.7% (price as of 2026-10-02) |
| June 8, 2021 | AMPH | M | 8,000 | $16.43 | $131,440 | 146,933 Direct | +5.76% | Acquired | 54.8% (price as of 2026-10-02) |
| June 7, 2021 | AMPH | A | 17,182 | · | · | 17,182 Direct | · | Acquired | (price as of 2026-10-02) |
| June 7, 2021 | AMPH | D | 7,827 | · | · | 8,000 Direct | -49.45% | Disposed | (price as of 2026-10-02) |
| June 7, 2021 | AMPH | A | 6,019 | · | · | 138,933 Direct | +4.53% | Acquired | (price as of 2026-10-02) |
| June 7, 2021 | AMPH | S | 7,827 | $19.28 | $150,905 | 132,914 Direct | -5.56% | Disposed | 31.9% (price as of 2026-10-02) |
| June 7, 2021 | AMPH | M | 7,827 | $16.43 | $128,598 | 140,741 Direct | +5.89% | Acquired | 54.8% (price as of 2026-10-02) |
| May 20, 2021 | AMPH | S | 10,000 | $19.74 | $197,400 | 132,914 Direct | -7.00% | Disposed | 28.8% (price as of 2026-10-02) |
| May 20, 2021 | AMPH | M | 10,000 | · | · | 15,827 Direct | -38.72% | Disposed | (price as of 2026-10-02) |
| May 20, 2021 | AMPH | M | 10,000 | $16.43 | $164,300 | 142,914 Direct | +7.52% | Acquired | 54.8% (price as of 2026-10-02) |
| June 12, 2020 | AMPH | F | 355 | $19.58 | $6,951 | 132,914 Direct | -0.27% | Disposed | 29.9% (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 | · | · | 133,269 Direct | +4.59% | Acquired | (price as of 2026-10-02) |
| June 7, 2020 | AMPH | F | 663 | $19.52 | $12,942 | 127,418 Direct | -0.52% | Disposed | 30.3% (price as of 2026-10-02) |
| May 26, 2020 | AMPH | M | 10,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 26, 2020 | AMPH | S | 10,000 | $18.60 | $186,000 | 128,081 Direct | -7.24% | Disposed | 36.7% (price as of 2026-10-02) |
| May 26, 2020 | AMPH | M | 10,000 | $15.11 | $151,100 | 138,081 Direct | +7.81% | Acquired | 68.3% (price as of 2026-10-02) |
| May 22, 2020 | AMPH | M | 10,000 | · | · | 10,000 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| May 22, 2020 | AMPH | S | 10,000 | $18.36 | $183,600 | 128,081 Direct | -7.24% | Disposed | 38.5% (price as of 2026-10-02) |
| May 22, 2020 | AMPH | M | 10,000 | $15.11 | $151,100 | 138,081 Direct | +7.81% | Acquired | 68.3% (price as of 2026-10-02) |
| May 21, 2020 | AMPH | M | 10,000 | · | · | 20,000 Direct | -33.33% | Disposed | (price as of 2026-10-02) |
| May 21, 2020 | AMPH | S | 10,000 | $18.47 | $184,700 | 128,081 Direct | -7.24% | Disposed | 37.7% (price as of 2026-10-02) |
| May 21, 2020 | AMPH | M | 10,000 | $15.11 | $151,100 | 138,081 Direct | +7.81% | Acquired | 68.3% (price as of 2026-10-02) |
| May 20, 2020 | AMPH | M | 17,782 | · | · | 30,000 Direct | -37.21% | Disposed | (price as of 2026-10-02) |
| May 20, 2020 | AMPH | S | 17,782 | $18.43 | $327,722 | 128,081 Direct | -12.19% | Disposed | 38.0% (price as of 2026-10-02) |
| May 20, 2020 | AMPH | M | 17,782 | $15.11 | $268,686 | 145,863 Direct | +13.88% | Acquired | 68.3% (price as of 2026-10-02) |
| June 12, 2019 | AMPH | A | 5,491 | · | · | 128,081 Direct | +4.48% | Acquired | (price as of 2026-10-02) |
| June 12, 2019 | AMPH | A | 13,915 | · | · | 13,915 Direct | · | Acquired | (price as of 2026-10-02) |
| June 7, 2019 | AMPH | F | 791 | $20.11 | $15,907 | 122,590 Direct | -0.64% | Disposed | 26.5% (price as of 2026-10-02) |
| Dec. 7, 2018 | AMPH | M | 9,278 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Dec. 7, 2018 | AMPH | S | 9,278 | $21.89 | $203,095 | 123,381 Direct | -6.99% | Disposed | 16.2% (price as of 2026-10-02) |
| Dec. 7, 2018 | AMPH | M | 9,278 | $14.66 | $136,015 | 132,659 Direct | +7.52% | Acquired | 73.5% (price as of 2026-10-02) |
| Dec. 6, 2018 | AMPH | M | 10,000 | · | · | 9,278 Direct | -51.87% | Disposed | (price as of 2026-10-02) |
| Dec. 6, 2018 | AMPH | S | 5,794 | $21.45 | $124,281 | 123,381 Direct | -4.49% | Disposed | 18.6% (price as of 2026-10-02) |
| Dec. 6, 2018 | AMPH | S | 4,206 | $20.91 | $87,947 | 129,175 Direct | -3.15% | Disposed | 21.6% (price as of 2026-10-02) |
| Dec. 6, 2018 | AMPH | M | 10,000 | $14.66 | $146,600 | 133,381 Direct | +8.10% | Acquired | 73.5% (price as of 2026-10-02) |
| Dec. 4, 2018 | AMPH | M | 10,000 | · | · | 19,278 Direct | -34.16% | Disposed | (price as of 2026-10-02) |
| Dec. 4, 2018 | AMPH | S | 1,011 | $22.55 | $22,798 | 123,381 Direct | -0.81% | Disposed | 12.8% (price as of 2026-10-02) |
| Dec. 4, 2018 | AMPH | S | 8,989 | $21.84 | $196,320 | 124,392 Direct | -6.74% | Disposed | 16.4% (price as of 2026-10-02) |
| Dec. 4, 2018 | AMPH | M | 10,000 | $14.66 | $146,600 | 133,381 Direct | +8.10% | Acquired | 73.5% (price as of 2026-10-02) |
| June 8, 2018 | AMPH | F | 1,754 | $16.67 | $29,239 | 123,381 Direct | -1.40% | Disposed | 52.5% (price as of 2026-10-02) |
| June 7, 2018 | AMPH | A | 16,679 | · | · | 16,679 Direct | · | Acquired | (price as of 2026-10-02) |
| June 7, 2018 | AMPH | A | 6,590 | · | · | 125,135 Direct | +5.56% | Acquired | (price as of 2026-10-02) |
| June 9, 2017 | AMPH | F | 1,826 | $16.84 | $30,750 | 118,545 Direct | -1.52% | Disposed | 51.0% (price as of 2026-10-02) |
| June 8, 2017 | AMPH | A | 20,291 | · | · | 20,291 Direct | · | Acquired | (price as of 2026-10-02) |
| June 8, 2017 | AMPH | A | 5,844 | · | · | 120,371 Direct | +5.10% | Acquired | (price as of 2026-10-02) |
| Nov. 15, 2016 | AMPH | M | 17,994 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Nov. 15, 2016 | AMPH | S | 17,994 | $20.76 | $373,555 | 114,527 Direct | -13.58% | Disposed | 22.5% (price as of 2026-10-02) |
| Nov. 15, 2016 | AMPH | M | 17,994 | $14.23 | $256,055 | 132,521 Direct | +15.71% | Acquired | 78.7% (price as of 2026-10-02) |
| Nov. 14, 2016 | AMPH | M | 20,000 | · | · | 17,994 Direct | -52.64% | Disposed | (price as of 2026-10-02) |
| Nov. 14, 2016 | AMPH | S | 20,000 | $20.56 | $411,200 | 114,527 Direct | -14.87% | Disposed | 23.7% (price as of 2026-10-02) |
| Nov. 14, 2016 | AMPH | M | 20,000 | $14.23 | $284,600 | 134,527 Direct | +17.46% | Acquired | 78.7% (price as of 2026-10-02) |
| Sept. 1, 2016 | AMPH | M | 10,381 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Sept. 1, 2016 | AMPH | S | 10,381 | $18.78 | $194,955 | 114,527 Direct | -8.31% | Disposed | 35.4% (price as of 2026-10-02) |
| Sept. 1, 2016 | AMPH | M | 10,381 | $15.23 | $158,103 | 125 Direct | · | Acquired | 67.0% (price as of 2026-10-02) |
| June 9, 2016 | AMPH | A | 25,827 | · | · | 25,827 Direct | · | Acquired | (price as of 2026-10-02) |
| June 9, 2016 | AMPH | A | 6,086 | · | · | 114,527 Direct | +5.61% | Acquired | (price as of 2026-10-02) |
| May 27, 2016 | AMPH | F | 1,460 | $15.75 | $22,995 | 108,441 Direct | -1.33% | Disposed | 61.5% (price as of 2026-10-02) |
| Dec. 16, 2015 | AMPH | M | 1,926 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Dec. 16, 2015 | AMPH | S | 1,926 | $14.33 | $27,600 | 109,901 Direct | -1.72% | Disposed | 77.5% (price as of 2026-10-02) |
| Dec. 16, 2015 | AMPH | M | 1,926 | $11.68 | $22,496 | 111,827 Direct | +1.75% | Acquired | 117.7% (price as of 2026-10-02) |
| Dec. 15, 2015 | AMPH | M | 36,536 | · | · | 1,926 Direct | -94.99% | Disposed | (price as of 2026-10-02) |
| Dec. 15, 2015 | AMPH | S | 36,536 | $14.34 | $523,926 | 109,901 Direct | -24.95% | Disposed | 77.3% (price as of 2026-10-02) |
| Dec. 15, 2015 | AMPH | M | 36,536 | $11.68 | $426,740 | 146,437 Direct | +33.24% | Acquired | 117.7% (price as of 2026-10-02) |
| May 27, 2015 | AMPH | A | 8,686 | · | · | 109,901 Direct | +8.58% | Acquired | (price as of 2026-10-02) |
| May 27, 2015 | AMPH | A | 47,782 | · | · | 47,782 Direct | · | Acquired | (price as of 2026-10-02) |
| Aug. 25, 2014 | AMPH | P | 6,000 | $10.84 | $65,040 | 101,215 Direct | +6.30% | Acquired | 134.6% (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 1, 2026 | AMPH | Stock Option (right to buy) | Common Stock | $18.42 | June 1, 2036 | 17,365 | Acquired |
| June 2, 2025 | AMPH | Stock Option (right to buy) | Common Stock | $25.38 | June 2, 2035 | 11,402 | Acquired |
| June 3, 2024 | AMPH | Stock Option (right to buy) | Common Stock | $42.25 | June 3, 2034 | 6,864 | Acquired |
| June 5, 2023 | AMPH | Stock Option (right to buy) | Common Stock | $46.01 | June 5, 2031 | 7,016 | Acquired |
| June 1, 2023 | AMPH | Stock Option (right to buy) | Common Stock | $16.69 | June 7, 2026 | 16,679 | Disposed |
| June 10, 2022 | AMPH | Stock Option (right to buy) | Common Stock | $30.02 | June 10, 2030 | 10,984 | Acquired |
| June 6, 2022 | AMPH | Stock Option (right to buy) | Common Stock | $17.11 | June 8, 2022 | 10,291 | Disposed |
| May 23, 2022 | AMPH | Stock Option (right to buy) | Common Stock | $17.11 | June 8, 2022 | 10,000 | Disposed |
| June 8, 2021 | AMPH | Stock Option (right to buy) | Common Stock | $16.43 | June 9, 2021 | 8,000 | Disposed |
| June 7, 2021 | AMPH | Stock Option (right to buy) | Common Stock | $19.52 | June 7, 2029 | 17,182 | Acquired |
| June 7, 2021 | AMPH | Stock Option (right to buy) | Common Stock | $16.43 | June 9, 2021 | 7,827 | Disposed |
| May 20, 2021 | AMPH | Stock Option (right to buy) | Common Stock | $16.43 | June 9, 2021 | 10,000 | Disposed |
| June 8, 2020 | AMPH | Stock Option (right to buy) | Common Stock | $20.08 | June 8, 2028 | 16,004 | Acquired |
| May 26, 2020 | AMPH | Stock Option (right to buy) | Common Stock | $15.11 | May 27, 2020 | 10,000 | Disposed |
| May 22, 2020 | AMPH | Stock Option (right to buy) | Common Stock | $15.11 | May 27, 2020 | 10,000 | Disposed |
| May 21, 2020 | AMPH | Stock Option (right to buy) | Common Stock | $15.11 | May 27, 2020 | 10,000 | Disposed |
| May 20, 2020 | AMPH | Stock Option (right to buy) | Common Stock | $15.11 | May 27, 2020 | 17,782 | Disposed |
| June 12, 2019 | AMPH | Stock Option (right to buy) | Common Stock | $20.03 | June 12, 2027 | 13,915 | Acquired |
| Dec. 7, 2018 | AMPH | Stock Option (right to buy) | Common Stock | $14.66 | Dec. 20, 2018 | 9,278 | Disposed |
| Dec. 6, 2018 | AMPH | Stock Option (right to buy) | Common Stock | $14.66 | Dec. 20, 2018 | 10,000 | Disposed |
| Dec. 4, 2018 | AMPH | Stock Option (right to buy) | Common Stock | $14.66 | Dec. 20, 2018 | 10,000 | Disposed |
| June 7, 2018 | AMPH | Stock Option (right to buy) | Common Stock | $16.69 | June 7, 2026 | 16,679 | Acquired |
| June 8, 2017 | AMPH | Stock Option (right to buy) | Common Stock | $17.11 | June 8, 2022 | 20,291 | Acquired |
| Nov. 15, 2016 | AMPH | Stock Option (right to buy) | Common Stock | $14.23 | Dec. 10, 2016 | 17,994 | Disposed |
| Nov. 14, 2016 | AMPH | Stock Option (right to buy) | Common Stock | $14.23 | Dec. 10, 2016 | 20,000 | Disposed |
| Sept. 1, 2016 | AMPH | Stock Option (right to buy) | Common Stock | $15.23 | Oct. 3, 2016 | 10,381 | Disposed |
| June 9, 2016 | AMPH | Stock Option (right to buy) | Common Stock | $16.43 | June 9, 2021 | 25,827 | Acquired |
| Dec. 16, 2015 | AMPH | Stock Option (right to buy) | Common Stock | $11.68 | Dec. 18, 2015 | 1,926 | Disposed |
| Dec. 15, 2015 | AMPH | Stock Option (right to buy) | Common Stock | $11.68 | Dec. 18, 2015 | 36,536 | Disposed |
| May 27, 2015 | AMPH | Stock Option (right to buy) | Common Stock | $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) | 38,462 | Direct |
| June 24, 2014 | AMPH | Stock Option (Right to Buy) | 10,381 | Direct |
| June 24, 2014 | AMPH | Stock Option (Right to Buy) | 37,994 | Direct |
| June 24, 2014 | AMPH | Stock Option (Right to Buy) | 29,278 | Direct |