Insider · CIK 0001870674
John J. Boniface
Files at SERA (SERA PROGNOSTICS, INC.). First filing Dec 7, 2023, latest Mar 12, 2026.
In brief
John J. Boniface files SEC Form 4 as officer at SERA (SERA PROGNOSTICS, INC.). Since Dec 7, 2023, John J. Boniface has reported 0 open-market buys worth $0 and 17 open-market sells worth $1.4M, the latest filed on Mar 12, 2026.
A track record needs three past buys with six months of prices behind them; John J. Boniface has 0, so none is measured yet.
The newest scored trade: sold $3,095 of SERA on Mar 11, 2026, filed Mar 12, 2026, scored 30 (weak). In the last 12 months: 0 buys worth $0 and 4 sells worth $34k.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
SERA: SERA PROGNOSTICS, INC.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 30Weak | SERA PROGNOSTICS, INC. | $3,095 1,517 shares | -1% | +30% from low-55% from high | |
| 30Weak | SERA PROGNOSTICS, INC. | $5,954 3,038 shares | -2% | +30% from low-55% from high | |
| 30Weak | SERA PROGNOSTICS, INC. | $4,409 1,332 shares | -1% | +128% from low-61% from high | |
| 30Weak | SERA PROGNOSTICS, INC. | $20k 7,767 shares | -5% | +71% from low-71% from high | |
| 30Weak | SERA PROGNOSTICS, INC. | $4,366 1,395 shares | -1% | +106% from low-65% from high | |
| 30Weak | SERA PROGNOSTICS, INC. | $18k 7,094 shares | -4% | +66% from low-72% from high | |
| 30Weak | SERA PROGNOSTICS, INC. | $2,130 1,439 shares | -1% | 0% from low-83% from high | |
| 30Weak | SERA PROGNOSTICS, INC. | $13k 5,132 shares | -3% | 0% from low-76% from high | |
| 30Weak | SERA PROGNOSTICS, INC. | $8,503 2,044 shares | -1% | +6% from low-53% from high | |
| 35Weak | SERA PROGNOSTICS, INC. | $27k 5,915 shares | -4% | +6% from low-51% from high | |
| 36Weak | SERA PROGNOSTICS, INC. | $35k 4,727 shares | -4% | - | |
| 36Weak | SERA PROGNOSTICS, INC. | $728k 77,136 shares | -54% | +510% from low-5% from high | |
| 27Weak | SERA PROGNOSTICS, INC. | $202k 22,163 shares | -12% | +490% from low-9% from high | |
| 27Weak | SERA PROGNOSTICS, INC. | $205k 21,438 shares | -13% | +513% from low-5% from high | |
| 30Weak | SERA PROGNOSTICS, INC. | $15k 1,664 shares | -1% | +485% from low-7% from high | |
| 36Weak | SERA PROGNOSTICS, INC. | $45k 5,665 shares | -3% | +598% from low0% from high | |
| 23Weak | SERA PROGNOSTICS, INC. | $24k 5,000 shares | -3% | +335% from low-8% from high |
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Mar 12, 2026 | SERA Sera Prognostics, Inc. | 1,517 0.00% of outstanding | $3,097 | Mar 11, 2026 | $10k |
| Mar 10, 2026 | SERA Sera Prognostics, Inc. | 3,038 0.01% of outstanding | $5,964 | Mar 9, 2026 | $4,405 |
| Dec 11, 2025 | SERA Sera Prognostics, Inc. | 1,332 0.00% of outstanding | $4,405 | Dec 10, 2025 | $25k |
| Nov 12, 2025 | SERA Sera Prognostics, Inc. | 7,767 0.02% of outstanding | $20k | Nov 10, 2025 | $4,365 |
| Sep 12, 2025 | SERA Sera Prognostics, Inc. | 1,395 0.00% of outstanding | $4,365 | Sep 11, 2025 | $18k |
| Aug 11, 2025 | SERA Sera Prognostics, Inc. | 7,094 0.02% of outstanding | $18k | Aug 8, 2025 | $15k |
| Jun 11, 2025 | SERA Sera Prognostics, Inc. | 1,439 0.00% of outstanding | $2,136 | Jun 10, 2025 | $13k |
| May 9, 2025 | SERA Sera Prognostics, Inc. | 5,132 0.01% of outstanding | $13k | May 8, 2025 | $36k |
| Mar 7, 2025 | SERA Sera Prognostics, Inc. | 2,044 0.01% of outstanding | $8,511 | Mar 6, 2025 | $27k |
| Feb 14, 2025 | SERA Sera Prognostics, Inc. | 5,915 0.02% of outstanding | $27k | Feb 12, 2025 | $35k |
| Nov 13, 2024 | SERA Sera Prognostics, Inc. | 4,727 0.01% of outstanding | $35k | Nov 11, 2024 | none |
| Mar 25, 2024 | SERA SERA PROGNOSTICS INC | 120,737 0.38% of outstanding | $1.2M | Mar 25, 2024 | $60k |
| Mar 7, 2024 | SERA SERA PROGNOSTICS, INC. | 1,664 0.01% of outstanding | $15k | Mar 6, 2024 | $69k |
| Feb 9, 2024 | SERA SERA PROGNOSTICS, INC. | 5,665 0.02% of outstanding | $45k | Feb 6, 2024 | $24k |
| Dec 7, 2023 | SERA SERA PROGNOSTICS, INC. | 5,000 0.02% of outstanding | $24k | Dec 7, 2023 | none |
Transactions
Every row this insider has filed, 27 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Mar 11, 2026 | SERA SERA PROGNOSTICS, INC. | SOpen-market sale Class A Common Stock | -1,517 | $2.04 | $3,095 | 145,842 | Mar 12, 2026 |
| Mar 9, 2026 | SERA SERA PROGNOSTICS, INC. | SOpen-market sale Class A Common Stock | -3,038 | $1.96 | $5,954 | 147,359 | Mar 10, 2026 |
| Dec 10, 2025 | SERA SERA PROGNOSTICS, INC. | SOpen-market sale Class A Common Stock | -1,332 | $3.31 | $4,409 | 150,397 | Dec 11, 2025 |
| Nov 10, 2025 | SERA SERA PROGNOSTICS, INC. | SOpen-market sale Class A Common Stock | -7,767 | $2.62 | $20k | 151,726 | Nov 12, 2025 |
| Sep 11, 2025 | SERA SERA PROGNOSTICS, INC. | SOpen-market sale Class A Common Stock | -1,395 | $3.13 | $4,366 | 159,493 | Sep 12, 2025 |
| Aug 8, 2025 | SERA SERA PROGNOSTICS, INC. | SOpen-market sale Class A Common Stock | -7,094 | $2.54 | $18k | 160,888 | Aug 11, 2025 |
| Jun 10, 2025 | SERA SERA PROGNOSTICS, INC. | SOpen-market sale Class A Common Stock | -1,439 | $1.48 | $2,130 | 167,982 | Jun 12, 2025 |
| May 30, 2025 | SERA SERA PROGNOSTICS, INC. | AGrant or award Class A Common Stock | +3,703 | $1.33 | $4,925 | 169,421 | Jun 12, 2025 |
| May 8, 2025 | SERA SERA PROGNOSTICS, INC. | SOpen-market sale Class A Common Stock | -5,132 | $2.44 | $13k | 165,718 | May 9, 2025 |
| Mar 5, 2025 | SERA SERA PROGNOSTICS, INC. | AGrant or award Class A Common Stock | +47,010 | $0.00 | $0 | 172,894 | Mar 7, 2025 |
| Mar 6, 2025 | SERA SERA PROGNOSTICS, INC. | SOpen-market sale Class A Common Stock | -2,044 | $4.16 | $8,503 | 170,850 | Mar 7, 2025 |
| Mar 5, 2025 | SERA SERA PROGNOSTICS, INC. | AGrant or award Stock Option (right to buy)derivative | +67,810 | $0.00 | $0 | 67,810 | Mar 7, 2025 |
| Feb 12, 2025 | SERA SERA PROGNOSTICS, INC. | SOpen-market sale Class A Common Stock | -5,915 | $4.58 | $27k | 125,884 | Feb 14, 2025 |
| Nov 11, 2024 | SERA SERA PROGNOSTICS, INC. | SOpen-market sale Class A Common Stock | -4,727 | $7.32 | $35k | 125,120 | Nov 12, 2024 |
| Mar 27, 2024 | SERA SERA PROGNOSTICS, INC. | SOpen-market sale Class A Common Stock10b5-1 | -3,753 | $9.62 | $36k | 139,771 | Mar 28, 2024 |
| Mar 27, 2024 | SERA SERA PROGNOSTICS, INC. | MOption exercise Class A Common Stock10b5-1 | +48,909 | $0.91 | $45k | 188,680 | Mar 28, 2024 |
| Mar 27, 2024 | SERA SERA PROGNOSTICS, INC. | SOpen-market sale Class A Common Stock10b5-1 | -48,909 | $9.62 | $471k | 139,771 | Mar 28, 2024 |
| Mar 28, 2024 | SERA SERA PROGNOSTICS, INC. | MOption exercise Class A Common Stock10b5-1 | +24,474 | $0.91 | $22k | 164,245 | Mar 28, 2024 |
| Mar 28, 2024 | SERA SERA PROGNOSTICS, INC. | SOpen-market sale Class A Common Stock10b5-1 | -24,474 | $9.04 | $221k | 139,771 | Mar 28, 2024 |
| Mar 27, 2024 | SERA SERA PROGNOSTICS, INC. | MOption exercise Stock Option (right to buy)derivative10b5-1 | -48,909 | $0.00 | $0 | 24,474 | Mar 28, 2024 |
| Mar 28, 2024 | SERA SERA PROGNOSTICS, INC. | MOption exercise Stock Option (right to buy)derivative10b5-1 | -24,474 | $0.00 | $0 | 0 | Mar 28, 2024 |
| Mar 26, 2024 | SERA SERA PROGNOSTICS, INC. | SOpen-market sale Class A Common Stock10b5-1 | -21,438 | $9.55 | $205k | 143,524 | Mar 26, 2024 |
| Mar 25, 2024 | SERA SERA PROGNOSTICS, INC. | SOpen-market sale Class A Common Stock10b5-1 | -22,163 | $9.10 | $202k | 164,962 | Mar 26, 2024 |
| Mar 6, 2024 | SERA SERA PROGNOSTICS, INC. | SOpen-market sale Class A Common Stock | -1,664 | $9.02 | $15k | 187,125 | Mar 7, 2024 |
| Feb 6, 2024 | SERA SERA PROGNOSTICS, INC. | SOpen-market sale Class A Common Stock | -5,665 | $8.03 | $45k | 188,789 | Feb 7, 2024 |
| Dec 7, 2023 | SERA SERA PROGNOSTICS, INC. | SOpen-market sale Class A Common Stock | -5,000 | $4.80 | $24k | 194,454 | Dec 7, 2023 |
| Nov 6, 2023 | SERA SERA PROGNOSTICS, INC. | AGrant or award Class A Common Stock | +125,000 | $0.00 | $0 | 194,454 | Nov 8, 2023 |
Questions about John J. Boniface
Answered from the filings on this page, as of the latest one.
Is John J. Boniface buying or selling?
In the last 12 months John J. Boniface reported 0 open-market buys worth $0 and 4 open-market sells worth $34k on SEC Form 4; the latest was sold $3,095 of SERA on Mar 11, 2026. Grants, option exercises and tax withholding are not counted.
How did John J. Boniface's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and John J. Boniface has 0.
Where does John J. Boniface file Form 4?
John J. Boniface has filed Form 4 at SERA (SERA PROGNOSTICS, INC.) as Chief Scientific Officer. A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.