John J. Boniface is CSO at SERA PROGNOSTICS, INC. (SERA). They have made 18 open-market trades across 1 company since 2022, most recently 2026-03-11.
CIK 0001870674
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 18 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| SERA | 145,842 | $298K |
Shares reported on the most recent Form 4, priced at the 2026-03-12 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| SERA | SELL | 2026-03-11 | 2026-03-12 | $2.04 | $3K | +1.0% | +9.5% | -0.5% |
| SERA | SELL | 2026-03-09 | 2026-03-10 | $1.96 | $6K | -8.0% | +11.2% | +13.3% |
| SERA | SELL | 2025-12-10 | 2025-12-11 | $3.31 | $4K | +4.2% | +4.4% | -44.0% |
| SERA | SELL | 2025-11-10 | 2025-11-12 | $2.62 | $20K | +8.7% | +12.9% | -14.8% |
| SERA | SELL | 2025-09-11 | 2025-09-12 | $3.13 | $4K | -3.1% | -3.8% | +6.6% |
| SERA | SELL | 2025-08-08 | 2025-08-11 | $2.54 | $18K | +3.0% | +32.9% | +10.4% |
| SERA | SELL | 2025-06-10 | 2025-06-12 | $1.48 | $2K | +13.6% | +56.8% | +74.4% |
| SERA | SELL | 2025-05-08 | 2025-05-09 | $2.44 | $13K | -16.5% | -34.8% | +13.0% |
| SERA | SELL | 2025-03-06 | 2025-03-07 | $4.16 | $9K | -1.2% | -19.1% | -61.8% |
| SERA | SELL | 2025-02-12 | 2025-02-14 | $4.58 | $27K | +1.7% | +2.7% | -40.8% |
| SERA | SELL | 2024-11-11 | 2024-11-12 | $7.32 | $35K | -11.1% | +16.0% | -39.5% |
| SERA | SELL | 2024-08-07 | 2024-08-08 | $7.42 | $37K | -3.7% | -0.3% | +19.4% |
| SERA | SELL | 2024-05-08 | 2024-05-10 | $9.59 | $47K | -9.4% | -10.7% | -18.1% |
| SERA | SELL · 10b5-1 | 2024-03-27 | 2024-03-28 | $9.43 | $1.4M | +8.4% | +23.6% | -35.8% |
| SERA | SELL | 2024-03-26 | 2024-03-26 | $9.55 | $409K | +1.5% | +8.2% | -32.2% |
| SERA | SELL | 2024-03-25 | 2024-03-26 | $9.10 | $403K | +1.5% | +8.2% | -32.2% |
| SERA | SELL | 2024-03-06 | 2024-03-07 | $9.02 | $15K | +0.1% | +7.3% | -1.3% |
| SERA | SELL | 2024-02-06 | 2024-02-07 | $8.03 | $45K | +19.1% | +22.2% | +21.5% |
| SERA | SELL | 2023-12-07 | 2023-12-07 | $4.80 | $24K | +13.8% | +5.3% | +76.3% |
| SERA | SELL · 10b5-1 | 2022-07-26 | 2022-07-27 | $2.17 | $8K | +6.7% | -3.1% | -29.8% |
| SERA | SELL · 10b5-1 | 2022-07-19 | 2022-07-19 | $1.86 | $5K | +21.3% | +17.6% | -20.7% |
| SERA | SELL · 10b5-1 | 2022-07-12 | 2022-07-13 | $1.84 | $5K | +35.1% | +68.8% | +11.0% |
| SERA | SELL · 10b5-1 | 2022-07-05 | 2022-07-05 | $1.63 | $4K | -3.1% | +38.1% | -5.1% |
| SERA | SELL · 10b5-1 | 2022-06-28 | 2022-06-29 | $1.84 | $7K | +3.4% | +29.5% | -4.0% |
| SERA | SELL · 10b5-1 | 2022-06-21 | 2022-06-21 | $1.31 | $4K | +30.0% | +52.3% | +27.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.