Guardant Health Director Roberto Mignone Converts 264 RSUs

What Happened

• Roberto Mignone, a director of Guardant Health (GH), reported the conversion/exercise of a derivative on 2026-09-21. The filing shows 264 shares acquired at $0.00 and an immediate disposition of 264 shares at $0.00 (both coded "M" — exercise/conversion of a derivative). The transactions show no cash exchanged in the record ($0 total), consistent with conversion of restricted stock units (RSUs) rather than an open-market purchase or sale.

Key Details

• Transaction date: 2026-09-21; Filing date: 2026-09-22 (timely).
• Acquired: 264 shares @ $0.00 (conversion/exercise of derivative).
• Disposed: 264 shares @ $0.00 (reported as derivative disposition).
• Shares owned after transaction: Not disclosed in the provided filing.
• Footnote F1: The RSU award (granted 11/08/2024) vests over four years — 25% vested 10/21/2025, remainder vests monthly over the next three years. F2: Not applicable for RSUs.
• The paired acquisition + disposition is recorded as derivative activity (code M); no 10b5-1 plan or late filing flag is indicated.

Context

• For retail investors: this looks like an RSU vesting/conversion event rather than a market buy or a value-generating sale. Filings that show conversion of RSUs followed by same-day disposition often reflect shares issued on vesting and shares subsequently transferred or withheld (commonly for tax withholding), but the form itself does not state the recipient purpose. Because no cash changed hands in the filing, there is no direct purchase or sale signal to infer market sentiment.