Form 4: SERA 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 $3.07 per share.

Summary

• Robert Gardner Harrison, Chief Information Officer of SERA PROGNOSTICS, INC. (SERA), reported a sale of company stock.
• The transaction involved the disposition of 2,000 shares of Class A Common Stock.
• The shares were sold on November 4, 2025, at a weighted average price of $3.07 per share.
• The sale was executed pursuant to a Rule 10b5-1 trading plan adopted by Mr. Harrison on May 21, 2025.
• Following this transaction, Mr. Harrison beneficially owns 95,932 shares of Class A Common Stock directly.

Sentiment

Score: 5

Explanation: The sentiment is neutral as this is a routine, pre-scheduled insider sale under a 10b5-1 plan, which typically does not indicate a change in management's view of the company's prospects.

Negatives

• An insider sale, even if pre-planned, reduces the reporting person's direct ownership in the company.

Future Outlook

This filing does not contain any forward-looking statements or guidance regarding the company's future performance or outlook.

Industry Context

This insider transaction report is specific to Sera Prognostics and its Chief Information Officer, and does not provide broader industry context or trends.

Stakeholder Impact

• Shareholders: A minor reduction in insider ownership, but the pre-planned nature of the sale mitigates concerns about its signaling effect.

Key Dates

Keywords

SERA PROGNOSTICS, SERA, Form 4, insider trading, stock sale, 10b5-1 plan, Robert Gardner Harrison, Chief Information Officer