We recently compiled a list of the 12 Best Performing Healthcare Stocks to Buy Right Now. Guardant Health, Inc. is one of them. Guardant Health, Inc. (NASDAQ:GH), a leading precision oncology company, specializes in blood-based cancer diagnostics, with its flagship Shield test for colorectal cancer (CRC) using AI-driven liquid biopsy technology. In September 2025, GH unveiled Shield V2, an upgraded version of its CRC test with improved sensitivity (84%) and specificity (90%), enhancing early cancer detec ...