Harrison Robert Gardner (CIK 1421563) reported 22 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-03-12). Recent activity: Sell SERA (716 shares), Sell SERA (3,360 shares), Sell SERA (2,000 shares), Sell SERA (2,000 shares), Sell SERA (2,000 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-12 | SERA PROGNOSTICS, INC. (SERA) | Chief Information Officer | Sell | 716 | $1,461 |
| 2026-03-10 | SERA PROGNOSTICS, INC. (SERA) | Chief Information Officer | Sell | 3,360 | $6,586 |
| 2026-02-24 | SERA PROGNOSTICS, INC. (SERA) | Chief Information Officer | Sell | 2,000 | $4,680 |
| 2026-01-27 | SERA PROGNOSTICS, INC. (SERA) | Chief Information Officer | Sell | 2,000 | $5,940 |
| 2025-12-30 | SERA PROGNOSTICS, INC. (SERA) | Chief Information Officer | Sell | 2,000 | $6,000 |
| 2025-12-11 | SERA PROGNOSTICS, INC. (SERA) | Chief Information Officer | Sell | 616 | $2,039 |
| 2025-12-03 | SERA PROGNOSTICS, INC. (SERA) | Chief Information Officer | Sell | 2,000 | $5,860 |
| 2025-11-12 | SERA PROGNOSTICS, INC. (SERA) | Chief Information Officer | Sell | 6,528 | $17,103 |
| 2025-11-04 | SERA PROGNOSTICS, INC. (SERA) | Chief Information Officer | Sell | 2,000 | $6,140 |
| 2025-10-08 | SERA PROGNOSTICS, INC. (SERA) | Chief Information Officer | Sell | 2,000 | $6,360 |
| 2025-09-12 | SERA PROGNOSTICS, INC. (SERA) | Chief Information Officer | Sell | 645 | $2,019 |
| 2025-09-09 | SERA PROGNOSTICS, INC. (SERA) | Chief Information Officer | Sell | 2,000 | $6,100 |
| 2025-08-20 | SERA PROGNOSTICS, INC. (SERA) | Chief Information Officer | Sell | 6,000 | $13,320 |
| 2025-08-11 | SERA PROGNOSTICS, INC. (SERA) | Chief Information Officer | Sell | 5,962 | $15,143 |
| 2025-06-11 | SERA PROGNOSTICS, INC. (SERA) | Chief Information Officer | Sell | 667 | $987 |
| 2025-05-09 | SERA PROGNOSTICS, INC. (SERA) | Chief Information Officer | Sell | 6,551 | $15,984 |
| 2025-03-10 | SERA PROGNOSTICS, INC. (SERA) | Chief Information Officer | Sell | 3,874 | $16,116 |
| 2025-03-07 | SERA PROGNOSTICS, INC. (SERA) | Chief Information Officer | Buy | 25,770 | $0 |
| 2025-03-07 | SERA PROGNOSTICS, INC. (SERA) | Chief Information Officer | Sell | 3,251 | $13,524 |
| 2025-02-14 | SERA PROGNOSTICS, INC. (SERA) | Chief Information Officer | Sell | 7,297 | $33,420 |
| 2025-02-14 | SERA PROGNOSTICS, INC. (SERA) | Chief Information Officer | Sell | 3,610 | $15,451 |
| 2025-02-13 | SERA PROGNOSTICS, INC. (SERA) | Chief Information Officer | Sell | 554 | $2,199 |
Source: SEC Form 4 filings · as of 2026-03-12