Guardant Health CTO Darya Chudova Sells $1.38M in Common Stock

Executive Summary

On September 15, 2026, Darya Chudova, Chief Technology Officer of Guardant Health, Inc. ($GH), executed an open-market sale of 7,738 shares of common stock at a price of $178.00 per share, yielding gross proceeds of approximately $1.38 million. Following the disposition, Chudova continues to hold 70,635 shares directly.

Transaction Details

• Security: Common Stock
• Transaction Code: S (Open market or private sale)
• Shares Sold: 7,738
• Execution Price: $178.00
• Total Transaction Value: $1,377,364.00
• Post-Transaction Direct Ownership: 70,635 shares
• 10b5-1 Plan Adoption: No indication of Rule 10b5-1 plan usage (aff10b5One is marked 0).

Market Impact & Significance

The sale represents roughly 9.87% of the insider's direct holding prior to the transaction. Given the transaction value exceeding $1 million and the absence of an indicated Rule 10b5-1 trading plan, the filing warrants a Medium significance rating, though the executive retains a substantial equity interest in the company.