Boniface John J. 4
4 · SERA PROGNOSTICS, INC. · Filed Mar 10, 2026
Research Summary
AI-generated summary of this filing
SERA Prognostics CSO Boniface John J. Sells 3,038 Shares
What Happened
Boniface John J., Chief Scientific Officer of SERA Prognostics, sold 3,038 shares on 2026-03-09 at a weighted average price of $1.96 per share for total proceeds of approximately $5,954. The sale is reported as an open market/private sale (code S) but, per the filing, was a "sell to cover" to satisfy tax withholding on vested restricted stock units (RSUs), not a discretionary trade by the insider.
Key Details
- Transaction date: 2026-03-09 (reported on Form 4 filed 2026-03-10). Filing appears timely.
- Shares sold: 3,038; weighted average price: $1.96; total reported proceeds: ~$5,954.
- Price range for the block trade: $1.87 to $2.03 (shares sold as part of a block trade in multiple transactions). Reporting person will provide exact allocations by price upon request (per footnote).
- Footnote F1: Sale mandated by issuer's "sell to cover" election to satisfy tax withholding on vested RSUs (not discretionary).
- Footnote F2: Price is a weighted average; multiple trade prices in the $1.87–$2.03 range.
- Shares owned after transaction: Not specified in the provided filing excerpt.
Context
"Sell to cover" transactions are routine tax-withholding sales that do not necessarily indicate an insider's view of the company's prospects. This was not a purchase or an options exercise; it was a compelled sale to meet tax obligations related to RSU vesting.
Insider Transaction Report
- Sale
Class A Common Stock
[F1][F2]2026-03-09$1.96/sh−3,038$5,954→ 147,359 total
Footnotes (2)
- [F1]Represents the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units ("RSUs"). The sale is mandated by the Issuer's election to require the satisfaction of tax withholding obligations to be funded by "sell to cover" transactions and does not represent a discretionary transaction by the Reporting Person.
- [F2]The price reported is a weighted average price. These shares were sold as part of a block trade in multiple transactions at prices ranging from $1.87 to $2.03, inclusive. The Reporting Person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price with regard to the block trade.