Form 4: SERA CFO Sells Stock for Tax Obligations

SERA Prognostics CFO Austin Aerts sold 873 shares of Class A Common Stock at a weighted average price of $3.31 to cover tax withholding obligations.

Summary

• Austin Aerts, Chief Financial Officer of SERA PROGNOSTICS, INC. (SERA), reported a transaction involving the company's Class A Common Stock.
• On December 10, 2025, Aerts sold 873 shares of Class A Common Stock.
• The shares were sold at a weighted average price of $3.31 per share, with individual transaction prices ranging from $3.28 to $3.38.
• This sale was a non-discretionary 'sell to cover' transaction, mandated by the issuer to satisfy tax withholding obligations associated with the vesting of restricted stock units (RSUs).
• Following this transaction, Aerts beneficially owns 272,214 shares of Class A Common Stock.

Sentiment

Score: 5

Explanation: The transaction is a routine 'sell to cover' for tax obligations related to RSU vesting, which is a non-discretionary event and does not reflect a change in management's sentiment towards the company or its future prospects.

Positives

• The sale was a non-discretionary 'sell to cover' transaction, indicating it was for tax withholding obligations rather than a voluntary decision to reduce holdings, which is generally viewed as less negative than a discretionary sale.

Negatives

• NA

Risks

• NA

Future Outlook

NA

Management Comments

• The sale 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.

Industry Context

NA

Comparison to Industry Standards

• NA

Management Changes

Corporate Governance

Legal Proceedings

• NA

Related Party Transactions

• NA

Stakeholder Impact

• Minimal impact on shareholders as the transaction is a routine, non-discretionary sale to cover tax obligations related to RSU vesting, rather than a voluntary reduction in ownership that might signal a lack of confidence.

Next Steps

• NA

Key Dates

Recommendation

This Form 4 reports a routine 'sell to cover' transaction by the CFO to satisfy tax obligations upon RSU vesting. Such non-discretionary sales do not typically signal a change in company fundamentals or management's outlook, and therefore, do not warrant a change in investment recommendation based solely on this filing.

Keywords

SERA PROGNOSTICS, SERA, Austin Aerts, CFO, Form 4, insider trading, stock sale, tax withholding, RSU, restricted stock units