Harrison Robert Gardner
SEC CIK 1421563 · EDGAR
BoughtSold
Companies
| Ticker | Company | Title | Holding | Bought | Sold | Trades | First | Last |
|---|---|---|---|---|---|---|---|---|
| SERA | SERA PROGNOSTICS, INC. | CIO | 76.7K | — | $515.9K | 31 | 2023-03-06 | 2026-03-11 |
Most active insiders at SERA, 12 months
| # | Insider | Title | Bought | Sold |
|---|---|---|---|---|
| 1 | Lindgardt Zhenya | CEO, Dir | — | $290.5K |
| 2 | Kearney Paul | Chief Data Off | — | $131.0K |
| 3 | Aerts Austin | CFO | — | $65.8K |
| 4 | Harrison Robert Gardner | CIO | — | $62.2K |
| 5 | Jackson Benjamin | GC | — | $38.4K |
| 6 | Boniface John J. | CSO | — | $33.8K |
| 7 | Anderson Dyaarl Lee Jr. | Chief Commercial Off | — | $13.1K |
| 8 | Lawrence Sandra AJ | Dir | — | $11.2K |
| 9 | Mirza Mansoor Raza | Dir | — | $2,280 |
| 10 | Inglis Tiffany Eul Davis | Chief Medical Off | — | $1,700 |
Transactions 31
| X | Filed | Traded | Ticker | Company | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-03-12 | 2026-03-11 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $2.04 | -716 | 76.7K | -0.9% | -$1,461 | |
| 2026-03-10 | 2026-03-09 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $1.96 | -3,360 | 77.4K | -4% | -$6,586 | |
| T | 2026-02-24 | 2026-02-24 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $2.34 | -2,000 | 80.8K | -2% | -$4,680 |
| T | 2026-01-27 | 2026-01-27 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $2.97 | -2,000 | 82.8K | -2% | -$5,940 |
| T | 2025-12-30 | 2025-12-30 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $3.00 | -2,000 | 84.8K | -2% | -$6,000 |
| 2025-12-11 | 2025-12-10 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $3.31 | -616 | 86.8K | -0.7% | -$2,039 | |
| T | 2025-12-03 | 2025-12-02 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $2.93 | -2,000 | 87.4K | -2% | -$5,860 |
| 2025-11-12 | 2025-11-10 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $2.62 | -6,528 | 89.4K | -7% | -$17.1K | |
| T | 2025-11-04 | 2025-11-04 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $3.07 | -2,000 | 95.9K | -2% | -$6,140 |
| T | 2025-10-08 | 2025-10-07 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $3.18 | -2,000 | 97.9K | -2% | -$6,360 |
| 2025-09-12 | 2025-09-11 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $3.13 | -645 | 99.9K | -0.6% | -$2,019 | |
| T | 2025-09-09 | 2025-09-09 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $3.05 | -2,000 | 100.6K | -2% | -$6,100 |
| T | 2025-08-20 | 2025-08-20 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $2.22 | -6,000 | 102.6K | -6% | -$13.3K |
| 2025-08-11 | 2025-08-08 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $2.54 | -5,962 | 108.6K | -5% | -$15.1K | |
| 2025-06-11 | 2025-06-10 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $1.48 | -667 | 114.5K | -0.6% | -$987.16 | |
| 2025-05-09 | 2025-05-08 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $2.44 | -6,551 | 115.2K | -5% | -$16.0K | |
| T | 2025-03-10 | 2025-03-07 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $4.16 | -3,874 | 121.8K | -3% | -$16.1K |
| D | 2025-03-07 | 2025-03-05 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | A - Grant | $0.00 | +25.8K | 128.9K | +25% | $0 |
| D | 2025-03-07 | 2025-03-06 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $4.16 | -3,251 | 125.6K | -3% | -$13.5K |
| T | 2025-02-14 | 2025-02-13 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $4.28 | -3,610 | 103.1K | -3% | -$15.5K |
| 2025-02-14 | 2025-02-12 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $4.58 | -7,297 | 106.7K | -6% | -$33.4K | |
| T | 2025-02-13 | 2025-02-11 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $3.97 | -554 | 114.0K | -0.5% | -$2,199 |
| MT | 2025-01-14 | 2025-01-10+ | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $7.27 | -16.5K | 118.7K | -12% | -$119.7K |
| 2024-11-12 | 2024-11-11 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $7.32 | -4,727 | 131.0K | -3% | -$34.6K | |
| 2024-08-08 | 2024-08-07 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $7.42 | -5,022 | 135.8K | -4% | -$37.3K | |
| 2024-05-10 | 2024-05-08 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $9.59 | -4,902 | 140.8K | -3% | -$47.0K | |
| 2024-03-07 | 2024-03-06 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $9.02 | -2,138 | 145.7K | -1% | -$19.3K | |
| 2024-02-07 | 2024-02-06 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $8.03 | -5,665 | 147.8K | -4% | -$45.5K | |
| 2023-11-08 | 2023-11-06 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | A - Grant | $0.00 | +125.0K | 153.5K | +439% | $0 | |
| 2023-06-06 | 2023-06-05 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | S - Sale | $3.23 | -5,000 | 28.5K | -15% | -$16.1K | |
| D | 2023-03-07 | 2023-03-06 | SERA | SERA PROGNOSTICS, INC. | Harrison Robert Gardner | CIO | A - Grant | $0.00 | +28.5K | 28.5K | New | $0 |
Purchase Sale Sale after option exercise All abbreviations