Aerts Austin 4

What Happened
Austin Aerts, Chief Financial Officer of SERA Prognostics, sold 674 shares on 2026-03-09 in an open-market/block trade. The weighted-average sale price reported was $1.96 per share, for proceeds of approximately $1,321. This sale was made to satisfy tax withholding related to the vesting of restricted stock units (RSUs), not as a discretionary cash-raising trade.

Key Details

• Transaction date: 2026-03-09; reported on Form 4 filed 2026-03-10 (timely filing).
• Transaction type/code: Sale (S).
• Shares sold: 674; weighted-average price: $1.96; total proceeds reported: $1,321.
• Price range: part of a block trade at prices from $1.87 to $2.03 (inclusive). Per the filing, full breakdown by price is available on request.
• Footnote F1: Sale was a required "sell to cover" to satisfy tax withholding on vested RSUs — not a discretionary sale by the insider.
• Shares owned after transaction: not disclosed in the provided filing.

Context
Sell-to-cover transactions to satisfy tax obligations from vested RSUs are routine and do not necessarily indicate a change in the insider's view of the company. The filing notes the sale was mandated by the issuer’s tax-withholding election and the price information for the block trade can be provided to the SEC, issuer, or security holders upon request.