Boniface John J. 4
4 · SERA PROGNOSTICS, INC. · Filed Mar 12, 2026
Research Summary
AI-generated summary of this filing
Sera Prognostics (SERA) CSO John Boniface Sells 1,517 Shares
What Happened John J. Boniface, Chief Scientific Officer of Sera Prognostics, sold 1,517 shares on 2026-03-11 in an open-market/block trade at a reported weighted average price of $2.04, for total proceeds of about $3,095. This sale was reported on Form 4 filed 2026-03-12. The transaction was a sale (not a purchase) and was done to cover tax withholding tied to the vesting of restricted stock units (RSUs), not as a discretionary cash-raising trade.
Key Details
- Transaction date: 2026-03-11; Form 4 filed: 2026-03-12 (timely).
- Shares sold: 1,517; weighted average price reported: $2.04; total reported proceeds: ~$3,095.
- Price range: shares were part of a block trade executed at prices between $1.90 and $2.30 (inclusive); the filer can provide per-price breakdown on request (footnote).
- Footnote F1: Sale mandated by issuer’s “sell-to-cover” election to satisfy tax withholding on RSU vesting (not a discretionary sale by the insider).
- Shares owned after the transaction: not specified in the provided filing excerpt.
Context
- This was a routine sell-to-cover tied to RSU vesting (tax withholding), which is common and generally not viewed as a directional signal about the insider’s view of the company.
- No options were exercised; the sale solely covered withholding obligations.
Insider Transaction Report
Form 4
Boniface John J.
Chief Scientific Officer
Transactions
- Sale
Class A Common Stock
[F1][F2]2026-03-11$2.04/sh−1,517$3,095→ 145,842 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 $1.90 to $2.30, 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.
Signature
/s/ Benjamin G. Jackson, Attorney-in-fact|2026-03-12