Yakob Liawatidewi
CIK 1743927 · View on SEC EDGAR ↗
Insider
First SEC filing: June 18, 2018 · Latest: June 18, 2018
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Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 77 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
77 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Nov. 6, 2024 | AMPH | S 10b5-1 | 5,214 | $52.05 | $271,389 | 74,938 Direct | -6.51% | Disposed | -58.5% (price as of 2026-08-21) |
| Aug. 28, 2023 | AMPH | S 10b5-1 | 28,816 | $53.13 | $1,530,994 | 69,669 Direct | -29.26% | Disposed | -59.3% (price as of 2026-08-21) |
| April 13, 2023 | AMPH | S 10b5-1 | 6,494 | $42.00 | $272,748 | 69,215 Direct | -8.58% | Disposed | -48.6% (price as of 2026-08-21) |
| April 13, 2023 | AMPH | S 10b5-1 | 5,000 | $41.00 | $205,000 | 75,709 Direct | -6.20% | Disposed | -47.3% (price as of 2026-08-21) |
| April 10, 2023 | AMPH | S 10b5-1 | 5,000 | $40.00 | $200,000 | 69,215 Direct | -6.74% | Disposed | -46.0% (price as of 2026-08-21) |
| Aug. 9, 2022 | AMPH | S 10b5-1 | 3,055 | $39.00 | $119,145 | 61,607 Direct | -4.72% | Disposed | -44.6% (price as of 2026-08-21) |
| Aug. 8, 2022 | AMPH | S 10b5-1 | 5,000 | $38.00 | $190,000 | 61,607 Direct | -7.51% | Disposed | -43.2% (price as of 2026-08-21) |
| July 15, 2022 | AMPH | S 10b5-1 | 7,359 | $36.97 | $272,062 | 61,607 Direct | -10.67% | Disposed | -41.6% (price as of 2026-08-21) |
| July 15, 2022 | AMPH | S 10b5-1 | 3,478 | $35.94 | $124,999 | 68,966 Direct | -4.80% | Disposed | -39.9% (price as of 2026-08-21) |
| Aug. 2, 2021 | AMPH | S 10b5-1 | 8,932 | $21.14 | $188,822 | 54,077 Direct | -14.18% | Disposed | 2.2% (price as of 2026-08-21) |
| July 15, 2021 | AMPH | S 10b5-1 | 31,524 | $20.01 | $630,795 | 54,077 Direct | -36.83% | Disposed | 7.9% (price as of 2026-08-21) |
| May 17, 2021 | AMPH | S | 9,637 | $19.99 | $192,644 | 53,573 Direct | -15.25% | Disposed | 8.1% (price as of 2026-08-21) |
| May 14, 2021 | AMPH | S | 3,186 | $19.92 | $63,465 | 53,573 Direct | -5.61% | Disposed | 8.4% (price as of 2026-08-21) |
| May 12, 2021 | AMPH | S | 4,592 | $19.33 | $88,763 | 56,759 Direct | -7.48% | Disposed | 11.7% (price as of 2026-08-21) |
| May 11, 2021 | AMPH | S | 10,000 | $19.06 | $190,600 | 61,351 Direct | -14.02% | Disposed | 13.3% (price as of 2026-08-21) |
| July 21, 2020 | AMPH | S 10b5-1 | 5,978 | $21.22 | $126,853 | 45,996 Direct | -11.50% | Disposed | 1.8% (price as of 2026-08-21) |
| July 20, 2020 | AMPH | S 10b5-1 | 4,186 | $21.03 | $88,032 | 45,996 Direct | -8.34% | Disposed | 2.7% (price as of 2026-08-21) |
| June 9, 2020 | AMPH | S | 23,405 | $20.41 | $477,696 | 46,124 Direct | -33.66% | Disposed | 5.8% (price as of 2026-08-21) |
| Sept. 13, 2019 | AMPH | S | 3,000 | $21.45 | $64,350 | 33,670 Direct | -8.18% | Disposed | 0.7% (price as of 2026-08-21) |
| Sept. 6, 2019 | AMPH | S | 2,395 | $21.90 | $52,450 | 2,459 Indirect | -49.34% | Disposed | -1.4% (price as of 2026-08-21) |
| Sept. 5, 2019 | AMPH | S | 1,515 | $21.24 | $32,179 | 4,854 Indirect | -23.79% | Disposed | 1.7% (price as of 2026-08-21) |
| Aug. 13, 2019 | AMPH | S 10b5-1 | 5,000 | $20.73 | $103,650 | 36,670 Direct | -12.00% | Disposed | 4.2% (price as of 2026-08-21) |
| Aug. 12, 2019 | AMPH | S 10b5-1 | 10,518 | $20.44 | $214,988 | 36,670 Direct | -22.29% | Disposed | 5.7% (price as of 2026-08-21) |
Showing latest 100 of 145 transactions
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 |
|---|---|---|---|---|---|---|---|
| March 10, 2025 | AMPH | Employee Stock Option (right to buy) | Common Stock (44,253) | $28.41 | March 10, 2035 | 44,253 | Acquired |
| Nov. 6, 2024 | AMPH | Employee Stock Option (right to buy) | Common Stock (5,214) | $13.03 | March 16, 2030 | 5,214 | Disposed |
| March 4, 2024 | AMPH | Employee Stock Option (right to buy) | Common Stock (22,655) | $46.68 | March 4, 2034 | 22,655 | Acquired |
| Aug. 28, 2023 | AMPH | Employee Stock Option (right to buy) | Common Stock (20,000) | $13.03 | March 16, 2030 | 20,000 | Disposed |
| Aug. 28, 2023 | AMPH | Employee Stock Option (right to buy) | Common Stock (5,497) | $20.23 | March 15, 2029 | 5,497 | Disposed |
| Aug. 28, 2023 | AMPH | Employee Stock Option (right to buy) | Common Stock (3,319) | $16.96 | June 14, 2028 | 3,319 | Disposed |
| April 13, 2023 | AMPH | Employee Stock Option (right to buy) | Common Stock (11,494) | $20.23 | March 15, 2029 | 11,494 | Disposed |
| April 10, 2023 | AMPH | Employee Stock Option (right to buy) | Common Stock (5,000) | $20.23 | March 15, 2029 | 5,000 | Disposed |
| March 6, 2023 | AMPH | Employee Stock Option (right to buy) | Common Stock (26,873) | $35.13 | March 6, 2033 | 26,873 | Acquired |
| Aug. 9, 2022 | AMPH | Employee Stock Option (right to buy) | Common Stock (3,055) | $19.79 | March 15, 2028 | 3,055 | Disposed |
| Aug. 8, 2022 | AMPH | Employee Stock Option (right to buy) | Common Stock (5,000) | $19.79 | March 15, 2028 | 5,000 | Disposed |
| July 15, 2022 | AMPH | Employee Stock Option (right to buy) | Common Stock (10,837) | $19.79 | March 15, 2028 | 10,837 | Disposed |
| March 15, 2022 | AMPH | Employee Stock Option (right to buy) | Common Stock (26,567) | $34.74 | March 15, 2032 | 26,567 | Acquired |
| Aug. 2, 2021 | AMPH | Employee Stock Option (right to buy) | Common Stock (8,932) | $14.95 | March 26, 2025 | 8,932 | Disposed |
| July 15, 2021 | AMPH | Employee Stock Option (right to buy) | Common Stock (23,352) | $13.35 | March 16, 2027 | 23,352 | Disposed |
| July 15, 2021 | AMPH | Employee Stock Option (right to buy) | Common Stock (7,674) | $13.03 | March 16, 2030 | 7,674 | Disposed |
| May 17, 2021 | AMPH | Empoyee Stock Option (right to buy) | Common Stock (9,637) | $11.33 | March 17, 2026 | 9,637 | Disposed |
| May 11, 2021 | AMPH | Employee Stock Option (right to buy) | Common Stock (10,000) | $11.33 | March 17, 2026 | 10,000 | Disposed |
| March 17, 2021 | AMPH | Employee Stock Option (right to buy) | Common Stock (45,420) | $17.99 | March 17, 2031 | 45,420 | Acquired |
| July 21, 2020 | AMPH | Employee Stock Option (right to buy) | Common Stock (5,978) | $11.33 | March 17, 2026 | 5,978 | Disposed |
| July 20, 2020 | AMPH | Employee Stock Option (right to buy) | Common Stock (4,186) | $11.33 | March 17, 2026 | 4,186 | Disposed |
| June 9, 2020 | AMPH | Employee Stock Option (right to buy) | Common Stock (16,000) | $10.93 | July 30, 2023 | 16,000 | Disposed |
| June 4, 2020 | AMPH | Employee Stock Option (right to buy) | Common Stock (7,091) | $19.19 | June 4, 2030 | 7,091 | Acquired |
| March 16, 2020 | AMPH | Employee Stock Option (right to buy) | Common Stock (43,850) | $13.03 | March 16, 2030 | 43,850 | Acquired |
| Aug. 13, 2019 | AMPH | Employee Stock Option (right to buy) | Common Stock (5,000) | $10.93 | July 30, 2023 | 5,000 | Disposed |
| Aug. 12, 2019 | AMPH | Employee Stock Option (right to buy) | Common Stock (5,000) | $10.93 | July 30, 2023 | 5,000 | Disposed |
| March 15, 2019 | AMPH | Employee Stock Option (right to buy) | Common Stock (21,991) | $20.23 | March 15, 2029 | 21,991 | Acquired |
| Feb. 14, 2019 | AMPH | Employee Stock Option (right to buy) | Common Stock (4,868) | $14.95 | March 26, 2025 | 4,868 | Disposed |
| Feb. 12, 2019 | AMPH | Employee Stock Option (right to buy) | Common Stock (4,000) | $14.95 | March 26, 2025 | 4,000 | Disposed |
| Feb. 5, 2019 | AMPH | Employee Stock Option (right to buy) | Common Stock (9,817) | $10.48 | Nov. 7, 2022 | 9,817 | Disposed |
| Jan. 23, 2019 | AMPH | Employee Stock Option (right to buy) | Common Stock (4,000) | $10.48 | Nov. 7, 2022 | 4,000 | Disposed |
| Jan. 22, 2019 | AMPH | Employee Stock Option (right to buy) | Common Stock (3,000) | $10.48 | Nov. 7, 2022 | 3,000 | Disposed |
| Jan. 16, 2019 | AMPH | Stock Option (right to buy) | Common Stock (3,175) | $10.48 | Nov. 7, 2022 | 3,175 | Disposed |
| Jan. 14, 2019 | AMPH | Stock Option (right to buy) | Common Stock (8) | $10.48 | Nov. 7, 2022 | 8 | Disposed |
| Nov. 30, 2018 | AMPH | Common Stock | Common Stock (11,500) | $20.26 | Aug. 5, 2019 | 11,500 | Disposed |
| Nov. 9, 2018 | AMPH | Stock Option (right to buy) | Common Stock (4,904) | $14.40 | April 14, 2024 | 4,904 | Disposed |
| Nov. 9, 2018 | AMPH | Stock Option (right to buy) | Common Stock (4,903) | $14.23 | Dec. 22, 2021 | 4,903 | Disposed |
| Nov. 8, 2018 | AMPH | Stock Option (right to buy) | Common Stock (6,000) | $11.41 | March 8, 2021 | 6,000 | Disposed |
| June 14, 2018 | AMPH | Stock Option (right to buy) | Common Stock (3,319) | $16.96 | June 14, 2028 | 3,319 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 13 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| June 18, 2018 | AMPH | Common Stock | — | Direct |
| June 18, 2018 | AMPH | Common Stock | 10,369 | Indirect |
| June 18, 2018 | AMPH | Employee Stock Option (right to buy)→ Common Stock (11,000) | 11,000 | Direct |
| June 18, 2018 | AMPH | Employee Stock Option (right to buy)→ Common Stock (11,500) | 11,500 | Direct |
| June 18, 2018 | AMPH | Employee Stock Option (right to buy)→ Common Stock (6,000) | 6,000 | Direct |
| June 18, 2018 | AMPH | Employee Stock Option (right to buy)→ Common Stock (4,903) | 4,903 | Direct |
| June 18, 2018 | AMPH | Employee Stock Option (right to buy)→ Common Stock (20,000) | 20,000 | Direct |
| June 18, 2018 | AMPH | Employee Stock Option (right to buy)→ Common Stock (26,000) | 26,000 | Direct |
| June 18, 2018 | AMPH | Employee Stock Option (right to buy)→ Common Stock (4,904) | 4,904 | Direct |
| June 18, 2018 | AMPH | Employee Stock Option (right to buy)→ Common Stock (17,800) | 17,800 | Direct |
| June 18, 2018 | AMPH | Employee Stock Option (right to buy)→ Common Stock (29,801) | 29,801 | Direct |
| June 18, 2018 | AMPH | Employee Stock Option (right to buy)→ Common Stock (23,352) | 23,352 | Direct |
| June 18, 2018 | AMPH | Employee Stock Option (right to buy)→ Common Stock (18,892) | 18,892 | Direct |