Boniface John J., Chief Scientific Officer of Sera Prognostics, Inc. ($SERA), made eight open market sales of company shares over the last year, totaling about $71,000. His most recent sale occurred on March 11, 2026. These transactions rank 10,015th among 11,678 insiders in our database, well below the average sale value of $8.6 million across 6.4 transactions per insider. He reported no open market purchases during this period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 11, 2026 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | S | Class A Common Stock | 1517 | $2.04 | 145,842.0000 | 49,525,108 | 1.03% | 0.00% |
| March 9, 2026 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | S | Class A Common Stock | 3038 | $1.96 | 147,359.0000 | 49,525,108 | 2.02% | 0.01% |
| Dec. 10, 2025 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | S | Class A Common Stock | 1332 | $3.31 | 150,397.0000 | 49,525,108 | 0.88% | 0.00% |
| Nov. 10, 2025 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | S | Class A Common Stock | 7767 | $2.62 | 151,726.0000 | 49,525,108 | 4.87% | 0.02% |
| Sept. 11, 2025 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | S | Class A Common Stock | 1395 | $3.13 | 159,493.0000 | 33,156,936 | 0.87% | 0.00% |
| Aug. 8, 2025 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | S | Class A Common Stock | 7094 | $2.54 | 160,888.0000 | 33,156,936 | 4.22% | 0.02% |
| June 10, 2025 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | S | Class A Common Stock | 1439 | $1.48 | 167,982.0000 | 33,156,936 | 0.85% | 0.00% |
| May 30, 2025 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | A | Class A Common Stock | 3703 | $1.33 | 169,421.0000 | 33,156,936 | 2.23% | 0.01% |
| May 8, 2025 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | S | Class A Common Stock | 5132 | $2.44 | 165,718.0000 | 33,156,936 | 3.00% | 0.02% |
| March 5, 2025 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | A | Stock Option (right to buy) | 67810 | $0.00 | 67,810.0000 | 33,156,936 | 9999.99% | 0.20% |
| March 6, 2025 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | S | Class A Common Stock | 2044 | $4.16 | 170,850.0000 | 33,156,936 | 1.18% | 0.01% |
| March 5, 2025 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | A | Class A Common Stock | 47010 | $0.00 | 172,894.0000 | 33,156,936 | 37.34% | 0.14% |
| Feb. 12, 2025 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | S | Class A Common Stock | 5915 | $4.58 | 125,884.0000 | 33,156,936 | 4.49% | 0.02% |
| Nov. 11, 2024 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | S | Class A Common Stock | 4727 | $7.32 | 125,120.0000 | 33,522,726 | 3.64% | 0.01% |
| Aug. 7, 2024 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | S | Class A Common Stock | 5022 | $7.42 | 129,847.0000 | 31,200,652 | 3.72% | 0.02% |
| May 8, 2024 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | S | Class A Common Stock | 4902 | $9.59 | 134,869.0000 | 31,200,652 | 3.51% | 0.02% |
| March 27, 2024 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | M | Stock Option (right to buy) | 48909 | $0.00 | 24,474.0000 | 31,200,652 | 66.65% | 0.16% |
| March 28, 2024 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | M | Stock Option (right to buy) | 24474 | $0.00 | 0.0000 | 31,200,652 | 100.00% | 0.08% |
| March 27, 2024 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | M | Class A Common Stock | 48909 | $0.91 | 188,680.0000 | 31,200,652 | 34.99% | 0.16% |
| March 27, 2024 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | S | Class A Common Stock | 48909 | $9.62 | 139,771.0000 | 31,200,652 | 25.92% | 0.16% |
| March 28, 2024 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | M | Class A Common Stock | 24474 | $0.91 | 164,245.0000 | 31,200,652 | 17.51% | 0.08% |
| March 28, 2024 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | S | Class A Common Stock | 24474 | $9.04 | 139,771.0000 | 31,200,652 | 14.90% | 0.08% |
| March 27, 2024 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | S | Class A Common Stock | 3753 | $9.62 | 139,771.0000 | 31,200,652 | 2.61% | 0.01% |
| March 25, 2024 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | S | Class A Common Stock | 22163 | $9.10 | 164,962.0000 | 31,200,652 | 11.84% | 0.07% |
| March 26, 2024 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | S | Class A Common Stock | 21438 | $9.55 | 143,524.0000 | 31,200,652 | 13.00% | 0.07% |
| March 6, 2024 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | S | Class A Common Stock | 1664 | $9.02 | 187,125.0000 | 31,200,652 | 0.88% | 0.01% |
| Feb. 6, 2024 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | S | Class A Common Stock | 5665 | $8.03 | 188,789.0000 | 31,200,652 | 2.91% | 0.02% |
| Dec. 7, 2023 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | S | Class A Common Stock | 5000 | $4.80 | 194,454.0000 | 0 | 2.51% | 0.00% |
| Nov. 6, 2023 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | A | Class A Common Stock | 125000 | $0.00 | 194,454.0000 | 0 | 179.98% | 0.00% |
| March 6, 2023 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | A | Stock Option (right to buy) | 34900 | $0.00 | 34,900.0000 | 0 | 9999.99% | 0.00% |
| March 6, 2023 | SERA PROGNOSTICS, INC. | $SERA | Boniface John J. | Chief Scientific Officer | A | Class A Common Stock | 22100 | $0.00 | 69,454.0000 | 0 | 46.67% | 0.00% |