Sera Prognostics, Inc. SEC Filings

Sera Prognostics insider sale reported. Paul Kearney, Chief Data Officer, filed a Form 4 disclosing a sale of 10,542 shares of Class A common stock on 08/29/2025 at a reported price of $3.49 per share. After the transaction Mr. Kearney beneficially owned 178,398 shares, held directly. The filing states the trade was executed under a Rule 10b5-1 trading plan adopted May 21, 2025, indicating the sale was preplanned rather than a discretionary transaction. The Form 4 was signed by an attorney-in-fact on behalf of the reporting person on 09/02/2025.

Sera Prognostics (SERA) Form 144 notice reports a proposed sale of 10,542 common shares with an aggregate market value of $32,469.36 through Morgan Stanley Smith Barney on NASDAQ, with an approximate sale date of 08/29/2025.

The shares were acquired as restricted stock units from the issuer on 02/06/2024. The filer also reported recent disposals in the past three months: 6,460 shares sold on 08/08/2025 for $16,408.40 and 1,311 shares sold on 06/10/2025 for $1,940.28. The filer certifies no undisclosed material adverse information and includes standard Notice and signature statements.

Harrison Robert Gardner, Chief Information Officer of Sera Prognostics, Inc. (SERA), reported a sale of 6,000 shares of Class A common stock on 08/20/2025 under a pre-existing Rule 10b5-1 trading plan adopted May 21, 2025. The shares were sold at a weighted average price of $2.22, with executed prices ranging from $2.17 to $2.25. After the sales, the reporting person beneficially owned 102,577 shares directly. The Form 4 was filed by one reporting person and signed by an attorney-in-fact on the same date.

Form 144 notice for SERA (Sera Prognostics, Inc.) reporting proposed sale of common stock by Robert Gardner Harrison. The filing lists 6,000 shares to be sold through Morgan Stanley Smith Barney LLC with an aggregate market value of $13,500.00 and an approximate sale date of 08/20/2025. The shares were acquired as Restricted Stock Units on 02/06/2024. The issuer's outstanding shares are shown as 37,094,109. The filing also discloses recent sales by the same person: 5,962 shares sold on 08/08/2025 for $15,143.48 and 667 shares sold on 06/10/2025 for $987.16. The notice includes the required representation that the seller is not aware of undisclosed material adverse information about the issuer.

RA Capital Management, L.P., RA Capital Healthcare Fund, L.P., Peter Kolchinsky and Rajeev Shah filed an amended Schedule 13G reporting no beneficial ownership of Sera Prognostics, Inc. (SERA) Class A common stock as of June 30, 2025. The filing lists each reporting person’s citizenship and principal business address and states that each holds 0 shares and 0.0% of the class. The filers expressly disclaim status as a group and certify the securities were not acquired to influence control of the issuer. A joint filing agreement is incorporated by reference.

Sera Prognostics (SERA) reporting person Zhenya Lindgardt, who serves as Chief Executive Officer and Director, reported a mandated sale to satisfy tax withholding on vested restricted stock units. On 08/08/2025 the reporting person sold 8,571 shares in a block trade at a weighted average price of $2.54; individual trade prices ranged from $2.28 to $2.73. The Form states the sale was required by the issuer's election to use "sell to cover" and was not a discretionary transaction by the reporting person.

Following the sale the reporting person beneficially owned 832,294 shares directly. The Form 4 was executed by an attorney-in-fact and filed with the SEC on 08/11/2025. No derivative transactions were reported in this filing.

Insider sale to cover RSU tax withholding. Kearney Paul, Chief Data Officer of Sera Prognostics (SERA), sold 6,460 shares of Class A common stock on 08/08/2025 as a mandated sell-to-cover to satisfy tax withholding associated with RSU vesting. The filing states this was not a discretionary transaction by the reporting person. The block trade produced a weighted-average price of $2.54, with transaction prices ranging from $2.28 to $2.73.

The reporting person continues to directly beneficially own 188,940 shares. The filer notes it will provide a per-price breakdown of the block trade to the SEC or other parties upon request. No derivative transactions were reported in this filing.

Benjamin G. Jackson, General Counsel of Sera Prognostics, reported the sale of 6,447 shares of Class A common stock on 08/08/2025 to satisfy tax withholding on vested restricted stock units. The filing states this was a mandatory "sell-to-cover" transaction and not a discretionary sale. The shares were executed as a block trade at a weighted average price of $2.54, with individual trade prices ranging from $2.28 to $2.73.

Following the sale the reporting person beneficially owns 127,751 shares on a direct basis. No derivative securities were reported. The disclosure documents an administrative, tax-related disposition rather than an elective insider sale.

Robert Gardner, Chief Information Officer and director at Sera Prognostics, sold shares to satisfy tax withholding from restricted stock units. The Form 4 reports a non-discretionary "sell to cover" transaction on 08/08/2025 in which 5,962 Class A common shares were sold as a block at prices ranging from $2.28 to $2.73, with a weighted average price of $2.54. After the sale the reporting person beneficially owns 108,577 shares. The filing states the sale was mandated by the issuer to satisfy tax obligations and that detailed per-price breakdowns for the block trade will be provided on request. No derivative securities were reported.