GH

Guardant Health makes blood tests that doctors use to detect cancer and understand tumors at the genetic level. Their Guardant360 test analyzes hundreds of genes in a blood sample to help identify mutations that affect cancer treatment decisions. They also offer Shield, a blood screening test for colorectal cancer, and various tissue tests that provide detailed genetic information about tumors. The company sells these tests to hospitals, cancer centers, and pharmaceutical companies that are developing new cancer drugs.