Guardant Health Director Roberto Mignone Exercises 264 RSUs

What happened

Roberto Mignone, a director of Guardant Health (GH), exercised/converted a derivative position resulting in the acquisition of 264 common shares on April 21, 2026. The Form 4 shows an acquisition of 264 shares at $0.00 and a corresponding disposition of 264 derivative units at $0.00 — i.e., 264 derivative awards were converted into 264 underlying shares with no cash paid.

Key details

• Transaction date: 2026-04-21; Form 4 filed 2026-04-22 (timely).
• Reported amounts: 264 shares acquired at $0.00; 264 derivative units disposed at $0.00.
• Shares owned after transaction: Not specified in this filing.
• Footnote: The shares relate to restricted stock units granted 11/08/2024 that vest over four years (25% vested 10/21/2025, remainder vests monthly over the next three years).
• No 10b5-1 plan, tax-withholding sale, or late-filing indication is shown in the filing.

Context

This filing reflects a conversion/settlement of derivative awards (restricted stock units) into common stock, rather than a market purchase or sale for cash. Such conversions commonly occur as RSUs vest; they do not by themselves indicate a buy or sell sentiment unless followed by open-market transactions.