Form 4: SERA CEO Sells Shares for Tax Obligations

SERA PROGNOSTICS CEO Zhenya Lindgardt sold 21,158 shares of Class A Common Stock at a weighted average price of $3.15 to cover tax withholding obligations related to RSU vesting.

Summary

• Zhenya Lindgardt, Chief Executive Officer and Director of SERA PROGNOSTICS, INC. (SERA), reported the sale of 21,158 shares of Class A Common Stock.
• The transaction occurred on September 9, 2025, at a weighted average price of $3.15 per share.
• The sale was non-discretionary, executed to satisfy tax withholding obligations in connection with the vesting of restricted stock units (RSUs), as mandated by the Issuer's 'sell to cover' election.
• Following this transaction, Lindgardt directly beneficially owns 811,136 shares of Class A Common Stock.
• The shares were sold as part of a block trade in multiple transactions, with prices ranging from $3.00 to $3.33, inclusive.
• 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 sentiment is neutral. While it's an insider sale, it's explicitly stated as non-discretionary and for tax purposes related to RSU vesting, which is a routine event and not indicative of a change in management's confidence in the company.

Positives

• The underlying event, the vesting of restricted stock units, represents a form of compensation and retention for the executive, indicating continued alignment with company performance.

Negatives

• The transaction results in a reduction of 21,158 shares in direct beneficial ownership by a key executive, Zhenya Lindgardt.

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

Insider transactions, particularly 'sell to cover' sales for tax obligations related to RSU vesting, are a common and routine occurrence across publicly traded companies. These transactions are often pre-scheduled under Rule 10b5-1 plans to avoid accusations of trading on material non-public information.

Stakeholder Impact

• Shareholders: A minor reduction in direct insider ownership, but for a routine, non-discretionary reason, which typically has minimal impact on investor sentiment.
• Employees: The vesting of RSUs is a standard compensation practice, which can positively impact employee retention and motivation.

Key Dates

Recommendation

A 'sell to cover' transaction for tax obligations, especially when executed under a Rule 10b5-1 plan, is a routine and non-discretionary event for executives. It does not typically signal a change in the executive's outlook on the company's prospects or warrant a change in investment recommendation. Investors should continue to evaluate the company based on its fundamental performance and broader market conditions.

Keywords

SERA PROGNOSTICS, SERA, Zhenya Lindgardt, CEO, Insider Transaction, Stock Sale, Form 4, Restricted Stock Units, Tax Withholding, Rule 10b5-1