Harrison Robert Gardner 4
4 · SERA PROGNOSTICS, INC. · Filed Mar 10, 2026
Research Summary
AI-generated summary of this filing
Sera (SERA) CIO Harrison Gardner Sells 3,360 Shares
What Happened
Harrison Robert Gardner, Chief Information Officer of Sera Prognostics, sold 3,360 shares on 2026-03-09 in an open-market/block sale. The reported weighted-average price was $1.96 per share (range $1.87–$2.03), resulting in proceeds of approximately $6,586. This sale was a disposition (S) and was done to satisfy tax withholding on vested restricted stock units (RSUs), a routine administrative transaction rather than a discretionary investment decision.
Key Details
- Transaction date: 2026-03-09; Form 4 filed 2026-03-10 (appears timely).
- Shares sold: 3,360; weighted-average price: $1.96; price range in block trade: $1.87–$2.03.
- Proceeds: approx. $6,586.
- Shares owned after transaction: not provided in the supplied filing details.
- Footnotes:
- F1 — Sale was a "sell-to-cover" required by the issuer to satisfy tax withholding on RSU vesting (not a discretionary sale).
- F2 — Price is a weighted average from a block trade executed in multiple transactions; detailed per-price breakdown available on request to the SEC/issuer.
- Transaction type: Sale to cover tax obligations on RSUs (code F in substance, reported as S).
Context
Sell-to-cover transactions to satisfy withholding on vested RSUs are common and typically administrative; they do not necessarily indicate the insider's view on the company's prospects. For retail investors, purchases or larger voluntary sales by insiders can be more informative than routine withholding sales.
Insider Transaction Report
- Sale
Class A Common Stock
[F1][F2]2026-03-09$1.96/sh−3,360$6,586→ 77,428 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.