Luo Mary Z.
Insider transactions at 1 company
This page shows all SEC Form 4 filings attributed to Luo Mary Z.. Form 4 disclosures are required whenever a corporate insider — director, officer, or 10%+ shareholder — buys, sells, or receives company stock. Each row represents a separate reported transaction. All data is sourced directly from the SEC EDGAR public database.
| Company | Title | Type | Shares | Price | Value | Date |
|---|---|---|---|---|---|---|
| AMPH | COO, Chief Scientist, Chairman | Tax Withholding | 5,753 | $27.62 | $158,898 | Mar 4, 2025 |
| AMPH | COO, Chief Scientist, Chairman | Gift | 125,000 | — | — | Nov 11, 2024 |
| AMPH | COO,Chief Scientist & Chairman | Tax Withholding | 202,658 | $43.05 | $8,724,427 | Mar 15, 2024 |
| AMPH | COO, Chief Scientist, Chairman | Tax Withholding | 7,031 | $46.31 | $325,606 | Mar 6, 2024 |
| AMPH | COO,Chief Scientist & Chairman | Sale | 3,714 | $58.35 | $216,712 | Jan 8, 2024 |
| AMPH | COO,Chief Scientist & Chairman | Tax Withholding | 9,998 | $37.60 | $375,925 | Mar 16, 2023 |
| AMPH | COO, Chief Sci. and Chairman | Tax Withholding | 2,803 | $36.84 | $103,263 | Mar 15, 2023 |
| AMPH | CEO & Chief Scientific Officer | Sale | 115 | $34.28 | $3,942 | May 18, 2022 |
| AMPH | CEO & Chief Scientific Officer | Sale | 54,274 | $35.58 | $1,931,069 | May 17, 2022 |
| AMPH | CEO & Chief Scientific Officer | Award / Grant | 76,914 | — | — | Mar 15, 2022 |
| AMPH | COO,Chief Scientist & Chairman | Award / Grant | 127,209 | — | — | Mar 16, 2021 |
| AMPH | COO,Chief Scientist & Chairman | Tax Withholding | 9,593 | $14.19 | $136,125 | Mar 15, 2020 |
| AMPH | COO,Chief Scientist & Chairman | Sale | 300,000 | $20.82 | $6,246,000 | Sep 11, 2019 |
| AMPH | COO,Chief Scientist & Chairman | Sale | 63,504 | $21.43 | $1,360,891 | Dec 11, 2018 |
| AMPH | COO, Chief Scientist, Chairman | Award / Grant | 98,029 | — | — | Mar 15, 2018 |
| AMPH | COO, Chief Scientist/Chairman | Option Exercise | 639,584 | $12.02 | $7,687,800 | Dec 15, 2017 |
| AMPH | COO,Chief Scientist & Chairman | Option Exercise | 319,792 | $12.02 | $3,843,900 | Nov 13, 2017 |
| AMPH | COO,Chief Scientist & Chairman | Tax Withholding | 153,882 | $15.86 | $2,440,569 | Sep 13, 2017 |
| AMPH | COO & Chief Scientist | Sale | 26,319 | $14.29 | $376,099 | Dec 11, 2015 |
| AMPH | COO and Chief Scientist | Option Exercise | 8,481 | $12.97 | $109,999 | Aug 17, 2015 |
| AMPH | COO, Chief Scientist, Chairman | Tax Withholding | 8,641 | $15.43 | $133,331 | Jun 5, 2015 |
| AMPH | COO, Chief Scientist, Chairman | Award / Grant | 125,418 | — | — | Mar 26, 2015 |