Form 4: SERA CFO Sells Stock for Tax Obligations

SERA Prognostics CFO Austin Aerts sold 6,351 shares of Class A Common Stock at a weighted average price of $2.62 to cover tax withholding obligations from RSU vesting.

Summary

• Austin Aerts, Chief Financial Officer of SERA Prognostics, Inc. (SERA), reported a transaction involving the company's Class A Common Stock.
• On November 10, 2025, Mr. Aerts disposed of 6,351 shares of Class A Common Stock.
• The shares were sold at a weighted average price of $2.62 per share, with individual transactions ranging from $2.30 to $3.04.
• The sale was executed to cover tax withholding obligations associated with the vesting of restricted stock units (RSUs).
• This transaction was mandated by the Issuer's policy requiring "sell to cover" transactions for tax obligations and was not a discretionary sale by Mr. Aerts.
• Following this transaction, Mr. Aerts beneficially owns 278,319 shares of Class A Common Stock.
• The transaction was made pursuant to a contract, instruction, or written plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Sentiment

Score: 5

Explanation: The transaction is a mandatory 'sell to cover' for tax withholding, which is a neutral event and not indicative of management's discretionary view on the company's prospects.

Future Outlook

The filing does not contain any forward-looking statements or guidance regarding the company's future performance or strategic direction.

Management Comments

• 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.

Industry Context

This Form 4 filing reports a routine insider transaction for tax purposes, which is common across all industries when restricted stock units vest. It does not provide specific insights into broader industry trends or competitive positioning.

Corporate Governance

Stakeholder Impact

• Shareholders: A minor, non-discretionary sale of shares by a key executive, which is a routine event for tax purposes and typically has minimal impact on shareholder sentiment or share price.
• Employees: The vesting of RSUs and subsequent 'sell to cover' transaction is a standard compensation practice for executives, aligning their interests with long-term company performance.

Key Dates

Keywords

SERA Prognostics, Austin Aerts, Form 4, Insider Transaction, Stock Sale, CFO, Restricted Stock Units, Tax Withholding, Sell to Cover, Rule 10b5-1