Form 4: Sera Prognostics CIO Sells 2,000 Shares Under 10b5-1 Plan

Sera Prognostics' Chief Information Officer, Robert Gardner Harrison, sold 2,000 shares of Class A Common Stock for a weighted average price of $3.00 per share.

Summary

• Robert Gardner Harrison, Chief Information Officer of Sera Prognostics, Inc. (SERA), reported a sale of 2,000 shares of Class A Common Stock.
• The transaction occurred on December 30, 2025, and was executed under a Rule 10b5-1 trading plan adopted on May 21, 2025.
• The shares were sold at a weighted average price of $3.00, with individual transaction prices ranging from $2.88 to $3.25.
• Following this transaction, Mr. Harrison beneficially owns 84,788 shares of Class A Common Stock directly.

Sentiment

Score: 5

Explanation: The sentiment is neutral as the transaction is a pre-planned insider sale under a Rule 10b5-1 plan, which typically indicates a scheduled liquidity event rather than a reaction to new company-specific information.

Positives

• The transaction was conducted under a pre-arranged Rule 10b5-1 trading plan, indicating a planned sale rather than a reaction to recent events.

Negatives

• An insider sale, even if planned, can sometimes be interpreted by the market as a lack of confidence, though the small volume and pre-planned nature mitigate this.

Future Outlook

NA

Industry Context

This Form 4 filing details an individual insider transaction and does not provide information relevant to broader industry trends or competitive analysis.

Stakeholder Impact

• Shareholders: May observe the insider sale, potentially influencing sentiment, though the impact is likely minimal given the transaction's nature and volume.

Key Dates

Keywords

Sera Prognostics, SERA, Insider Trading, Form 4, Stock Sale, Robert Gardner Harrison, Chief Information Officer, 10b5-1 Plan