Tzuo Tien
Insider transactions at 1 company
This page shows all SEC Form 4 filings attributed to Tzuo Tien. 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 |
|---|---|---|---|---|---|---|
| AMPL | Award / Grant | 977 | — | — | Oct 5, 2025 | |
| AMPL | Award / Grant | 894 | — | — | Jul 5, 2025 | |
| AMPL | Award / Grant | 398 | — | — | Apr 5, 2025 | |
| AMPL | Award / Grant | 44,462 | — | — | Feb 22, 2025 | |
| 0001423774 | Chairman and CEO | Disposition | 110,104 | $10.00 | $1,101,040 | Feb 14, 2025 |
| 0001423774 | Chairman and CEO | Sale | 49,041 | $9.95 | $487,958 | Dec 31, 2024 |
| 0001423774 | Chairman and CEO | Sale | 48,569 | $9.93 | $482,290 | Dec 31, 2024 |
| 0001423774 | Chairman and CEO | Sale | 63,873 | $8.34 | $532,701 | Oct 3, 2024 |
| 0001423774 | Chairman and CEO | Option Exercise | 50,000 | — | — | Sep 30, 2024 |
| 0001423774 | Chairman and CEO | Option Exercise | 13,353 | — | — | Jul 16, 2024 |
| 0001423774 | Chairman and CEO | Sale | 28,891 | $9.00 | $260,019 | Jul 11, 2024 |
| 0001423774 | Chairman and CEO | Sale | 114,825 | $9.05 | $1,039,166 | Jul 8, 2024 |
| 0001423774 | Chairman and CEO | Sale | 70,833 | $9.73 | $689,205 | Jun 30, 2024 |
| 0001423774 | Chairman and CEO | Option Exercise | 239,198 | — | — | Apr 17, 2024 |
| 0001423774 | Chairman and CEO | Option Exercise | 12,500 | — | — | Apr 1, 2024 |
| 0001423774 | Chairman and CEO | Sale | 229,248 | $9.26 | $2,122,836 | Jan 22, 2024 |
| 0001423774 | Chairman and CEO | Option Exercise | 13,843 | — | — | Dec 31, 2023 |
| 0001423774 | Chairman and CEO | Option Exercise | 100,000 | — | — | Dec 6, 2023 |
| 0001423774 | Chairman and CEO | Option Exercise | 116,666 | — | — | Sep 29, 2023 |
| 0001423774 | Chairman and CEO | Sale | 12,500 | $10.93 | $136,625 | Jun 30, 2023 |
| 0001423774 | Chairman and CEO | Option Exercise | 12,500 | — | — | Mar 31, 2023 |
| 0001423774 | Chairman and CEO | Sale | 12,500 | $6.36 | $79,500 | Dec 31, 2022 |
| 0001423774 | Chairman and CEO | Option Exercise | 12,500 | — | — | Oct 4, 2022 |
| 0001272830 | Disposition | 8,356 | $21.00 | $175,476 | Jul 21, 2022 | |
| 0001423774 | Chairman and CEO | Option Exercise | 12,500 | — | — | Jun 30, 2022 |
| 0001423774 | Chairman and CEO | Sale | 12,500 | $15.09 | $188,625 | Mar 31, 2022 |
| 0001423774 | Chairman and CEO | Option Exercise | 10,000 | — | — | Mar 17, 2022 |
| 0001423774 | Chairman and CEO | Option Exercise | 12,500 | — | — | Jan 3, 2022 |
| 0001423774 | Chairman and CEO | Option Exercise | 10,000 | — | — | Dec 7, 2021 |
| 0001423774 | Chairman and CEO | C | 100 | — | — | Oct 18, 2021 |
| 0001272830 | Award / Grant | 1,753 | — | — | Oct 1, 2021 | |
| 0001423774 | Chairman and CEO | Option Exercise | 5,000 | — | — | Sep 30, 2021 |
| 0001423774 | Chairman and CEO | Option Exercise | 5,000 | — | — | Aug 30, 2021 |
| 0001272830 | Award / Grant | 1,990 | — | — | Jul 1, 2021 | |
| 0001423774 | Chairman and CEO | C | 15,000 | — | — | Jun 1, 2021 |
| 0001423774 | Chairman and CEO | Sale | 20,000 | $17.76 | $355,200 | Apr 14, 2021 |
| 0001423774 | Chairman and CEO | C | 5,000 | — | — | Apr 1, 2021 |
| 0001272830 | Award / Grant | 2,381 | — | — | Apr 1, 2021 | |
| 0001423774 | Chairman and CEO | C | 10,000 | — | — | Mar 16, 2021 |
| 0001423774 | Chairman and CEO | Sale | 25,000 | $15.00 | $375,000 | Jan 22, 2021 |
| 0001272830 | Award / Grant | 2,232 | — | — | Jan 1, 2021 |