| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | AMPH | Common Stock | Gift | $0 | -57.4K | -100% | $0.00* | 0 | Mar 16, 2023 | See footnote | F1 |
| transaction | AMPH | Common Stock | Gift | $0 | -57.4K | -100% | $0.00* | 0 | Mar 16, 2023 | See footnote | F2 |
| transaction | AMPH | Common Stock | Tax liability | -$949K | -25.2K | -1.19% | $37.60 | 2.09M | Mar 16, 2023 | Direct | F3, F4 |
| transaction | AMPH | Common Stock | Tax liability | -$376K | -10K | -0.68% | $37.60 | 1.46M | Mar 16, 2023 | See footnote | F3, F5, F6 |
| transaction | AMPH | Common Stock | Tax liability | -$572K | -15.8K | -0.75% | $36.29 | 2.08M | Mar 17, 2023 | Direct | F3 |
| transaction | AMPH | Common Stock | Tax liability | -$256K | -7.05K | -0.48% | $36.29 | 1.46M | Mar 17, 2023 | See footnote | F3, F6 |
| holding | AMPH | Common Stock | 6.83M | Mar 16, 2023 | See footnote | F7 | |||||
| holding | AMPH | Common Stock | 5K | Mar 16, 2023 | See footnote | F8 |
| Id | Content |
|---|---|
| F1 | The shares are held of record by The Jack Y. Zhang 2020 GRAT dated February 7, 2020, Jack Y. Zhang trustee (the "Zhang GRAT"). On February 7, 2020, Dr. Zhang contributed 353,797 shares of directly held Issuer common stock to the Zhang GRAT for the benefit of himself and his three adult children (the "Distributees"). Pursuant to the terms of the Zhang GRAT, upon termination of the Zhang GRAT, 57,365 of the shares were distributed to Distributees. The remaining 296,431 shares representing annuity payments under the Zhang GRAT were previously distributed to Dr. Zhang and continue to be reported in this Form 4 as directly owned by Dr. Zhang. |
| F2 | The shares are held of record by The Mary Z. Luo 2020 GRAT dated February 7, 2020, Mary Z. Luo trustee (the "Luo GRAT"). On February 7, 2020, Dr. Luo contributed 353,797 shares of directly held Issuer common stock to the Luo GRAT for the benefit of herself and her three adult children (the "Distributees"). Pursuant to the terms of the Luo GRAT, upon termination of the Luo GRAT, 57,365 of the shares were distributed to Distributees. The remaining 296,431 shares representing annuity payments under the Luo GRAT were previously distributed to Dr. Luo and continue to be reported in this Form 4 as directly owned by Dr. Luo. |
| F3 | The reported shares were withheld to satisfy the reporting person's tax liability in connection with the vesting of restricted stock units, or RSUs. |
| F4 | Excludes 57,365 shares previously reported as held directly by Dr. Zhang as described in footnote (1) above. |
| F5 | Excludes 57,365 shares previously reported as held directly by Dr. Luo as described in footnote (2) above. |
| F6 | The securities are held of record by Dr. Luo. The reporting persons are husband and wife. |
| F7 | The shares are held of record by Applied Physics & Chemistry Laboratories, Inc., of which the reporting persons and The Bill Luobei Zhang 2004 Irrevocable Trust are the sole owners. |
| F8 | The shares are held of record in an account for the benefit of the reporting persons' son. The reporting persons disclaim beneficial ownership of these shares, and the inclusion of these shares in this report should not be deemed an admission of beneficial ownership of any such shares for purposes of Section 16, or for any other purpose. |