Boniface John J. 4

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.