Shares of Guardant Health Inc. (GH) are up over 25% at $90 in premarket trading on Thursday, after the company reported exceptionally strong financial results for the quarter ended September 30, 2025, and raised its full-year 2025 outlook.This commercial-stage precision oncology company Guardant360 Liquid test and Guardant360 CDx test, the first comprehensive liquid biopsy test approved by the FDA to provide tumor mutation profiling with solid tumors and to be used as a companion diagnostic in connection w ...