Guardant Health Announces Proposed Public Offering of Common Stock Share PALO ALTO, Calif.--(BUSINESS WIRE)--Guardant Health, Inc. ("Guardant Health†) (Nasdaq: GH), a leading precision oncology company, today announced the commencement of an underwritten public offering of $250.0 million of shares of Guardant Health's common stock (the "common stock offering†). Guardant Health also intends to grant the underwriters a 30-day option to purchase up to an additional $37.5 million of shares of its common sto ...