Guardant Health (GH) Director Roberto Mignone Converts 264 RSUs

What Happened

• Roberto Mignone, a director of Guardant Health, had 264 restricted stock units (RSUs) convert into 264 shares (reported as an M-code exercise/conversion) on August 21, 2026. The filing also shows a simultaneous disposition of 264 shares. Both the acquisition and disposition are reported at $0.00, resulting in no cash value reported in the Form 4.

Key Details

• Transaction date: 2026-08-21
• Reported in Form 4 filed: 2026-08-24 (timely; Form 4 is due within 2 business days)
• Acquired: 264 shares via conversion/exercise (code M) at $0.00
• Disposed: 264 shares (derivative) at $0.00
• Shares owned after transaction: not disclosed in the provided filing
• Footnotes: F1 — RSU award granted 11/08/2024 vests over four years (25% vested 10/21/2025; remaining 75% vests monthly over the following three years). F2 — “Not applicable for Restricted Stock Units.”
• No 10b5-1 plan, tax-withholding method, or sale proceeds are specified in this filing.

Context

• M-code transactions indicate exercise or conversion of derivative securities; here that means vested RSUs were converted into common shares. The filing shows an equal number of shares acquired and disposed, so the net share change reported is zero. Conversions of RSUs and simultaneous dispositions (e.g., to cover taxes or satisfy withholding) are common, but this specific filing does not state the reason for the disposition. This is not a purchase (which many investors view as a more direct bullish signal).