144 0001214130 XXXXXXXX LIVE 0001576280 Guardant Health, Inc. 001-38683 3100 HANOVER STREET PALO ALTO CA 94304 855-698-8887 POTTER MYRTLE S Director Common Charles Schwab & Co., Inc.

3000 Schwab Way Westlake TX 76262

26 1534.52 124705857 08/19/2025 NASDAQ Common 08/15/2025 Restricted Stock Lapse Guardant Health, Inc. N 26 08/15/2025 Equity Compensation N MYRTLE S POTTER

3100 HANOVER STREET PALO ALTO CA 94303

Guardant Health, Inc. 06/16/2025 2626 130512.00 MYRTLE S POTTER

3100 HANOVER STREET PALO ALTO CA 94303

Guardant Health, Inc. 06/18/2025 26 1286.00 MYRTLE S POTTER

3100 HANOVER STREET PALO ALTO CA 94303

Guardant Health, Inc. 07/17/2025 26 1253.00 08/19/2025 03/15/2025 MYRTLE S POTTER