Stephen B. Shohet
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 |
|---|---|---|---|---|---|---|---|---|---|
| Dec. 10, 2018 | AMPH | M | 58,557 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Dec. 10, 2018 | AMPH | S | 58,557 | $21.72 | $1,271,858 | 30,706 Direct | -65.60% | Disposed | 16.8% (price as of 2026-10-05) |
| Dec. 10, 2018 | AMPH | M | 58,557 | $14.66 | $858,446 | 89,263 Direct | +190.70% | Acquired | 73.1% (price as of 2026-10-05) |
| June 7, 2018 | AMPH | A | 16,679 | · | · | 16,679 Direct | · | Acquired | (price as of 2026-10-05) |
| June 7, 2018 | AMPH | A | 6,590 | · | · | 30,706 Direct | +27.33% | Acquired | (price as of 2026-10-05) |
| Dec. 14, 2017 | AMPH | M | 7,866 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Dec. 14, 2017 | AMPH | S 10b5-1 | 7,866 | $18.87 | $148,431 | 24,116 Direct | -24.60% | Disposed | 34.4% (price as of 2026-10-05) |
| Dec. 14, 2017 | AMPH | M | 7,866 | $10.77 | $84,717 | 31,982 Direct | +32.62% | Acquired | 135.6% (price as of 2026-10-05) |
| Dec. 7, 2017 | AMPH | M | 7,862 | · | · | 7,866 Direct | -49.99% | Disposed | (price as of 2026-10-05) |
| Dec. 7, 2017 | AMPH | S 10b5-1 | 7,862 | $18.34 | $144,189 | 24,116 Direct | -24.59% | Disposed | 38.3% (price as of 2026-10-05) |
| Dec. 7, 2017 | AMPH | M | 7,862 | $10.77 | $84,674 | 31,978 Direct | +32.60% | Acquired | 135.6% (price as of 2026-10-05) |
| Nov. 30, 2017 | AMPH | M | 7,862 | · | · | 15,728 Direct | -33.33% | Disposed | (price as of 2026-10-05) |
| Nov. 30, 2017 | AMPH | S 10b5-1 | 7,862 | $19.25 | $151,344 | 24,116 Direct | -24.59% | Disposed | 31.8% (price as of 2026-10-05) |
| Nov. 30, 2017 | AMPH | M | 7,862 | $10.77 | $84,674 | 31,978 Direct | +32.60% | Acquired | 135.6% (price as of 2026-10-05) |
| Nov. 22, 2017 | AMPH | M | 7,862 | · | · | 23,590 Direct | -25.00% | Disposed | (price as of 2026-10-05) |
| Nov. 22, 2017 | AMPH | S 10b5-1 | 7,862 | $18.94 | $148,906 | 24,116 Direct | -24.59% | Disposed | 33.9% (price as of 2026-10-05) |
| Nov. 22, 2017 | AMPH | M | 7,862 | $10.77 | $84,674 | 31,978 Direct | +32.60% | Acquired | 135.6% (price as of 2026-10-05) |
| Nov. 16, 2017 | AMPH | M | 7,862 | · | · | 31,452 Direct | -20.00% | Disposed | (price as of 2026-10-05) |
| Nov. 16, 2017 | AMPH | S 10b5-1 | 7,862 | $18.04 | $141,830 | 24,116 Direct | -24.59% | Disposed | 40.6% (price as of 2026-10-05) |
| Nov. 16, 2017 | AMPH | M | 7,862 | $10.77 | $84,674 | 31,978 Direct | +32.60% | Acquired | 135.6% (price as of 2026-10-05) |
| Nov. 9, 2017 | AMPH | M | 7,862 | · | · | 39,314 Direct | -16.67% | Disposed | (price as of 2026-10-05) |
| Nov. 9, 2017 | AMPH | S 10b5-1 | 100 | $19.06 | $1,906 | 24,116 Direct | -0.41% | Disposed | 33.1% (price as of 2026-10-05) |
| Nov. 9, 2017 | AMPH | S 10b5-1 | 6,962 | $18.66 | $129,911 | 24,216 Direct | -22.33% | Disposed | 36.0% (price as of 2026-10-05) |
| Nov. 9, 2017 | AMPH | S 10b5-1 | 800 | $17.51 | $14,008 | 31,178 Direct | -2.50% | Disposed | 44.9% (price as of 2026-10-05) |
| Nov. 9, 2017 | AMPH | M | 7,862 | $10.77 | $84,674 | 31,978 Direct | +32.60% | Acquired | 135.6% (price as of 2026-10-05) |
| Nov. 2, 2017 | AMPH | M | 7,862 | · | · | 47,176 Direct | -14.28% | Disposed | (price as of 2026-10-05) |
| Nov. 2, 2017 | AMPH | S 10b5-1 | 7,862 | $18.37 | $144,425 | 24,116 Direct | -24.59% | Disposed | 38.1% (price as of 2026-10-05) |
| Nov. 2, 2017 | AMPH | M | 7,862 | $10.77 | $84,674 | 31,978 Direct | +32.60% | Acquired | 135.6% (price as of 2026-10-05) |
| Oct. 26, 2017 | AMPH | M | 7,862 | · | · | 55,038 Direct | -12.50% | Disposed | (price as of 2026-10-05) |
| Oct. 26, 2017 | AMPH | S 10b5-1 | 7,862 | $18.39 | $144,582 | 24,116 Direct | -24.59% | Disposed | 38.0% (price as of 2026-10-05) |
| Oct. 26, 2017 | AMPH | M | 7,862 | $10.77 | $84,674 | 31,978 Direct | +32.60% | Acquired | 135.6% (price as of 2026-10-05) |
| Oct. 19, 2017 | AMPH | M | 7,862 | · | · | 62,900 Direct | -11.11% | Disposed | (price as of 2026-10-05) |
| Oct. 19, 2017 | AMPH | S 10b5-1 | 7,862 | $18.34 | $144,189 | 24,116 Direct | -24.59% | Disposed | 38.3% (price as of 2026-10-05) |
| Oct. 19, 2017 | AMPH | M | 7,862 | $10.77 | $84,674 | 31,978 Direct | +32.60% | Acquired | 135.6% (price as of 2026-10-05) |
| Oct. 12, 2017 | AMPH | M | 7,862 | · | · | 70,762 Direct | -10.00% | Disposed | (price as of 2026-10-05) |
| Oct. 12, 2017 | AMPH | S 10b5-1 | 7,862 | $18.73 | $147,255 | 24,116 Direct | -24.59% | Disposed | 35.5% (price as of 2026-10-05) |
| Oct. 12, 2017 | AMPH | M | 7,862 | $10.77 | $84,674 | 31,978 Direct | +32.60% | Acquired | 135.6% (price as of 2026-10-05) |
| June 8, 2017 | AMPH | A | 20,291 | · | · | 20,291 Direct | · | Acquired | (price as of 2026-10-05) |
| June 8, 2017 | AMPH | A | 5,844 | · | · | 24,116 Direct | +31.98% | Acquired | (price as of 2026-10-05) |
| Aug. 16, 2016 | AMPH | M | 10,670 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Aug. 16, 2016 | AMPH | S | 10,670 | $18.35 | $195,794 | 18,272 Direct | -36.87% | Disposed | 38.3% (price as of 2026-10-05) |
| Aug. 16, 2016 | AMPH | M | 10,670 | $14.23 | $151,834 | 28,942 Direct | +58.40% | Acquired | 78.3% (price as of 2026-10-05) |
| Aug. 15, 2016 | AMPH | M | 22,917 | · | · | 10,670 Direct | -68.23% | Disposed | (price as of 2026-10-05) |
| Aug. 15, 2016 | AMPH | S | 22,917 | $18.26 | $418,464 | 18,272 Direct | -55.64% | Disposed | 38.9% (price as of 2026-10-05) |
| Aug. 15, 2016 | AMPH | M | 22,917 | $14.23 | $326,109 | 41,189 Direct | +125.42% | Acquired | 78.3% (price as of 2026-10-05) |
| Aug. 12, 2016 | AMPH | M | 4,407 | · | · | 33,587 Direct | -11.60% | Disposed | (price as of 2026-10-05) |
| Aug. 12, 2016 | AMPH | M | 10,381 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Aug. 12, 2016 | AMPH | S | 14,788 | $18.12 | $267,959 | 18,272 Direct | -44.73% | Disposed | 40.0% (price as of 2026-10-05) |
| Aug. 12, 2016 | AMPH | M | 4,407 | $14.23 | $62,712 | 33,060 Direct | +15.38% | Acquired | 78.3% (price as of 2026-10-05) |
| Aug. 12, 2016 | AMPH | M | 10,381 | $15.23 | $158,103 | 28,653 Direct | +56.81% | Acquired | 66.6% (price as of 2026-10-05) |
| June 9, 2016 | AMPH | A | 25,827 | · | · | 25,827 Direct | · | Acquired | (price as of 2026-10-05) |
| June 9, 2016 | AMPH | A | 6,086 | · | · | 18,272 Direct | +49.94% | Acquired | (price as of 2026-10-05) |
| Dec. 17, 2015 | AMPH | M | 15,191 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Dec. 17, 2015 | AMPH | S 10b5-1 | 15,191 | $14.19 | $215,560 | 12,186 Direct | -55.49% | Disposed | 78.8% (price as of 2026-10-05) |
| Dec. 17, 2015 | AMPH | M | 15,191 | $11.68 | $177,431 | 27,377 Direct | +124.66% | Acquired | 117.2% (price as of 2026-10-05) |
| Dec. 16, 2015 | AMPH | M | 15,579 | · | · | 15,191 Direct | -50.63% | Disposed | (price as of 2026-10-05) |
| Dec. 16, 2015 | AMPH | S 10b5-1 | 15,579 | $14.19 | $221,066 | 12,186 Direct | -56.11% | Disposed | 78.8% (price as of 2026-10-05) |
| Dec. 16, 2015 | AMPH | M | 15,579 | $11.68 | $181,963 | 27,765 Direct | +127.84% | Acquired | 117.2% (price as of 2026-10-05) |
| July 17, 2015 | AMPH | M | 7,692 | · | · | 30,770 Direct | -20.00% | Disposed | (price as of 2026-10-05) |
| July 17, 2015 | AMPH | S 10b5-1 | 7,692 | $17.41 | $133,918 | 12,186 Direct | -38.70% | Disposed | 45.7% (price as of 2026-10-05) |
| July 17, 2015 | AMPH | M | 7,692 | $11.68 | $89,843 | 19,878 Direct | +63.12% | Acquired | 117.2% (price as of 2026-10-05) |
| May 27, 2015 | AMPH | A | 8,686 | · | · | 12,186 Direct | +248.17% | Acquired | (price as of 2026-10-05) |
| May 27, 2015 | AMPH | A | 47,782 | · | · | 47,782 Direct | · | Acquired | (price as of 2026-10-05) |
| Aug. 15, 2014 | AMPH | P | 3,500 | $10.37 | $36,295 | 3,500 Direct | · | Acquired | 144.6% (price as of 2026-10-05) |
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 |
|---|---|---|---|---|---|---|---|
| Dec. 10, 2018 | AMPH | Stock Option (right to buy) | Common Stock | $14.66 | Dec. 20, 2018 | 58,557 | Disposed |
| June 7, 2018 | AMPH | Stock Option (right to buy) | Common Stock | $16.69 | June 7, 2026 | 16,679 | Acquired |
| Dec. 14, 2017 | AMPH | Stock Option (right to buy) | Common Stock | $10.77 | Dec. 15, 2017 | 7,866 | Disposed |
| Dec. 7, 2017 | AMPH | Stock Option (right to buy) | Common Stock | $10.77 | Dec. 15, 2017 | 7,862 | Disposed |
| Nov. 30, 2017 | AMPH | Stock Option (right to buy) | Common Stock | $10.77 | Dec. 15, 2017 | 7,862 | Disposed |
| Nov. 22, 2017 | AMPH | Stock Option (right to buy) | Common Stock | $10.77 | Dec. 15, 2017 | 7,862 | Disposed |
| Nov. 16, 2017 | AMPH | Stock Option (right to buy) | Common Stock | $10.77 | Dec. 15, 2017 | 7,862 | Disposed |
| Nov. 9, 2017 | AMPH | Stock Option (right to buy) | Common Stock | $10.77 | Dec. 15, 2017 | 7,862 | Disposed |
| Nov. 2, 2017 | AMPH | Stock Option (right to buy) | Common Stock | $10.77 | Dec. 15, 2017 | 7,862 | Disposed |
| Oct. 26, 2017 | AMPH | Stock Option (right to buy) | Common Stock | $10.77 | Dec. 15, 2017 | 7,862 | Disposed |
| Oct. 19, 2017 | AMPH | Stock Option (right to buy) | Common Stock | $10.77 | Dec. 15, 2017 | 7,862 | Disposed |
| Oct. 12, 2017 | AMPH | Stock Option (right to buy) | Common Stock | $10.77 | Dec. 15, 2017 | 7,862 | Disposed |
| June 8, 2017 | AMPH | Stock Option (right to buy) | Common Stock | $17.11 | June 8, 2022 | 20,291 | Acquired |
| Aug. 16, 2016 | AMPH | Stock Option (right to buy) | Common Stock | $14.23 | Dec. 10, 2016 | 10,670 | Disposed |
| Aug. 15, 2016 | AMPH | Stock Option (right to buy) | Common Stock | $14.23 | Dec. 10, 2016 | 22,917 | Disposed |
| Aug. 12, 2016 | AMPH | Stock Option (right to buy) | Common Stock | $14.23 | Dec. 10, 2016 | 4,407 | Disposed |
| Aug. 12, 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. 17, 2015 | AMPH | Stock Option (right to buy) | Common Stock | $11.68 | Dec. 18, 2015 | 15,191 | Disposed |
| Dec. 16, 2015 | AMPH | Stock Option (right to buy) | Common Stock | $11.68 | Dec. 18, 2015 | 15,579 | Disposed |
| July 17, 2015 | AMPH | Stock Option (right to buy) | Common Stock | $11.68 | Dec. 18, 2015 | 7,692 | 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) 5 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| 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) | 78,624 | Direct |
| June 24, 2014 | AMPH | Stock Option (Right to Buy) | 58,557 | Direct |