Form 4: Sera Prognostics CIO Sells Shares for Tax Obligations

Sera Prognostics' Chief Information Officer, Robert Gardner Harrison, sold 645 shares of Class A Common Stock to cover tax withholding obligations related to restricted stock unit vesting.

Summary

• Robert Gardner Harrison, Chief Information Officer of Sera Prognostics, Inc. (SERA), sold 645 shares of Class A Common Stock.
• The transaction occurred on September 11, 2025, at a weighted average price of $3.13 per share.
• The sale was non-discretionary, mandated by the issuer to cover tax withholding obligations arising from the vesting of restricted stock units (RSUs).
• Following this transaction, Mr. Harrison beneficially owns 99,932 shares of Class A Common Stock.

Sentiment

Score: 5

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

Positives

• The vesting of restricted stock units (RSUs) indicates the achievement of certain performance milestones or tenure by the Chief Information Officer, reflecting a positive aspect of executive compensation.

Negatives

• A reduction in direct beneficial ownership by the Chief Information Officer by 645 shares, although this was a non-discretionary sale.

Future Outlook

NA

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

NA

Related Party Transactions

• Sale of Class A Common Stock by Chief Information Officer Robert Gardner Harrison to cover tax withholding obligations arising from the vesting of restricted stock units granted by Sera Prognostics, Inc.

Stakeholder Impact

• Shareholders: A minor reduction in insider ownership, but the non-discretionary nature of the 'sell to cover' transaction mitigates concerns about management confidence.
• Employees: The vesting of RSUs can be viewed as a positive for employee retention and motivation, as it represents a payout of equity compensation.

Key Dates

Recommendation

The Form 4 filing details a routine 'sell to cover' transaction by the Chief Information Officer to satisfy tax obligations from RSU vesting. This is a non-discretionary sale and does not indicate a change in the company's fundamentals or management's outlook. Therefore, it provides no new information to warrant a change from a 'hold' recommendation.

Keywords

Sera Prognostics, SERA, Form 4, Insider Trading, Stock Sale, Restricted Stock Units, Tax Withholding, Robert Gardner Harrison, Chief Information Officer