Guardant Health: director Roberto Mignone exercised 264 shares

What happened Roberto Mignone, a director of Guardant Health, exercised or converted derivative securities that resulted in 264 shares acquired and 264 shares disposed on Oct 21, 2026 at $0.00, total $0, as reported on the Form 4 filed Oct 22, 2026.

Key details

• Transaction date(s) and price(s): Oct 21, 2026 — 264 shares @ $0.00 acquired (code M); Oct 21, 2026 — 264 shares @ $0.00 disposed (code M). Total reported value $0.
• Shares owned after the transaction: not reported in this Form 4.
• Footnotes:
  • F1: The restricted stock unit award granted on November 8, 2024 vests over a four-year period. 25% of the shares subject to such award vested on October 21, 2025 and the remaining 75% vests monthly for the three-year period thereafter.
  • F2: Not applicable for Restricted Stock Units.
• Filing timeliness: Form filed Oct 22, 2026 for a transaction on Oct 21, 2026 (no late-file flag shown in the filing).

Why it may matter

• The Form 4 records an exercise/conversion of derivative securities. The filing shows both acquisition and disposition of the same 264 shares on the same date; the filing does not specify whether the disposition was a market sale (cashless exercise) or another type of transfer.
• A filing does not show why the insider traded or why the company acted.