John J. Boniface insider trades: Sera Prognostics (SERA) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where John reports to the SEC
Open-market buys and sales
40 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Mar 11, 2026 | SERA | ↓ Sell | 1,517 | $2.04 | $3K | Direct | Mar 12, 2026 (1d) |
| Mar 9, 2026 | SERA | ↓ Sell | 3,038 | $1.96 | $6K | Direct | Mar 10, 2026 (1d) |
| Dec 10, 2025 | SERA | ↓ Sell | 1,332 | $3.31 | $4K | Direct | Dec 11, 2025 (1d) |
| Nov 10, 2025 | SERA | ↓ Sell | 7,767 | $2.62 | $20K | Direct | Nov 12, 2025 (2d) |
| Sep 11, 2025 | SERA | ↓ Sell | 1,395 | $3.13 | $4K | Direct | Sep 12, 2025 (1d) |
| Aug 8, 2025 | SERA | ↓ Sell | 7,094 | $2.54 | $18K | Direct | Aug 11, 2025 (3d) |
| Jun 10, 2025 | SERA | ↓ Sell | 1,439 | $1.48 | $2K | Direct | Jun 12, 2025 (2d) |
| May 8, 2025 | SERA | ↓ Sell | 5,132 | $2.44 | $13K | Direct | May 9, 2025 (1d) |
| Mar 6, 2025 | SERA | ↓ Sell | 2,044 | $4.16 | $9K | Direct | Mar 7, 2025 (1d) |
| Feb 12, 2025 | SERA | ↓ Sell | 5,915 | $4.58 | $27K | Direct | Feb 14, 2025 (2d) |
| Nov 11, 2024 | SERA | ↓ Sell | 4,727 | $7.32 | $35K | Direct | Nov 12, 2024 (1d) |
| Aug 7, 2024 | SERA | ↓ Sell | 5,022 | $7.42 | $37K | Direct | Aug 8, 2024 (1d) |
| May 8, 2024 | SERA | ↓ Sell | 4,902 | $9.59 | $47K | Direct | May 10, 2024 (2d) |
| Mar 28, 2024 | SERA | ↓ Sell | 77,136 | $9.44 | $728K | Direct | Mar 28, 2024 (0d) |
| Mar 26, 2024 | SERA | ↓ Sell | 21,438 | $9.55 | $205K | Direct | Mar 26, 2024 (0d) |
| Mar 25, 2024 | SERA | ↓ Sell | 22,163 | $9.10 | $202K | Direct | Mar 26, 2024 (1d) |
| Mar 6, 2024 | SERA | ↓ Sell | 1,664 | $9.02 | $15K | Direct | Mar 7, 2024 (1d) |
| Feb 6, 2024 | SERA | ↓ Sell | 5,665 | $8.03 | $45K | Direct | Feb 7, 2024 (1d) |
| Dec 7, 2023 | SERA | ↓ Sell | 5,000 | $4.80 | $24K | Direct | Dec 7, 2023 (0d) |
| Jul 27, 2022 | SERA | ↓ Sell | 3,725 | $2.17 | $8K | Direct | Jul 27, 2022 (0d) |
| Jul 19, 2022 | SERA | ↓ Sell | 2,725 | $1.86 | $5K | Direct | Jul 19, 2022 (0d) |
| Jul 12, 2022 | SERA | ↓ Sell | 2,725 | $1.84 | $5K | Direct | Jul 13, 2022 (1d) |
| Jul 5, 2022 | SERA | ↓ Sell | 2,725 | $1.63 | $4K | Direct | Jul 5, 2022 (0d) |
| Jun 29, 2022 | SERA | ↓ Sell | 3,725 | $1.84 | $7K | Direct | Jun 29, 2022 (0d) |
| Jun 21, 2022 | SERA | ↓ Sell | 2,725 | $1.31 | $4K | Direct | Jun 21, 2022 (0d) |
| Jun 14, 2022 | SERA | ↓ Sell | 2,725 | $1.21 | $3K | Direct | Jun 16, 2022 (2d) |
| Jun 7, 2022 | SERA | ↓ Sell | 2,725 | $1.30 | $4K | Direct | Jun 7, 2022 (0d) |
| Jun 1, 2022 | SERA | ↓ Sell | 3,725 | $1.43 | $5K | Direct | Jun 1, 2022 (0d) |
| May 24, 2022 | SERA | ↓ Sell | 2,725 | $1.54 | $4K | Direct | May 24, 2022 (0d) |
| May 17, 2022 | SERA | ↓ Sell | 2,725 | $1.55 | $4K | Direct | May 17, 2022 (0d) |
| May 10, 2022 | SERA | ↓ Sell | 2,725 | $1.97 | $5K | Direct | May 10, 2022 (0d) |
| May 4, 2022 | SERA | ↓ Sell | 1,000 | $2.17 | $2K | Direct | May 4, 2022 (0d) |
| May 3, 2022 | SERA | ↓ Sell | 2,725 | $2.17 | $6K | Direct | May 3, 2022 (0d) |
| Apr 26, 2022 | SERA | ↓ Sell | 2,725 | $2.17 | $6K | Direct | Apr 26, 2022 (0d) |
| Apr 19, 2022 | SERA | ↓ Sell | 2,725 | $2.08 | $6K | Direct | Apr 20, 2022 (1d) |
| Apr 12, 2022 | SERA | ↓ Sell | 2,725 | $2.66 | $7K | Direct | Apr 13, 2022 (1d) |
| Apr 6, 2022 | SERA | ↓ Sell | 3,725 | $3.26 | $12K | Direct | Apr 7, 2022 (1d) |
| Mar 29, 2022 | SERA | ↓ Sell | 2,725 | $3.73 | $10K | Direct | Mar 30, 2022 (1d) |
| Mar 22, 2022 | SERA | ↓ Sell | 2,725 | $3.68 | $10K | Direct | Mar 23, 2022 (1d) |
| Mar 14, 2022 | SERA | ↓ Sell | 2,725 | $3.94 | $11K | Direct | Mar 15, 2022 (1d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other SERA insiders
Open-market trades in the last 12 months
About John J. Boniface's insider trades
John J. Boniface is Chief Scientific Officer at Sera Prognostics (SERA). Since Mar 14, 2022, John has reported no open-market purchases and 40 sales worth $1.6M on SEC Form 4. In the last 12 months: 4 sales ($34K).
Their filings also include option exercises (9 filings), grants and awards (5 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every SERA insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.