Tzuo Tien (CIK 1735409) reported 6 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-07-07). Recent activity: Buy AMPL (1,521 shares), Buy AMPL (1,538 shares), Buy AMPL (999 shares), Buy AMPL (977 shares), Buy AMPL (894 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-07 | Amplitude, Inc. (AMPL) | Director | Buy | 1,521 | $0 |
| 2026-04-07 | Amplitude, Inc. (AMPL) | Director | Buy | 1,538 | $0 |
| 2026-01-07 | Amplitude, Inc. (AMPL) | Director | Buy | 999 | $0 |
| 2025-10-07 | Amplitude, Inc. (AMPL) | Director | Buy | 977 | $0 |
| 2025-07-08 | Amplitude, Inc. (AMPL) | Director | Buy | 894 | $0 |
| 2025-04-08 | Amplitude, Inc. (AMPL) | Director | Buy | 398 | $0 |
Source: SEC Form 4 filings · as of 2026-07-07