Gritstone Oncology, Inc., an immuno-oncology company, engages in developing tumor-specific cancer immunotherapies to fight various cancer types. Its lead product candidate is GRANITE, which is in Phase I/II clinical trial for the treatment of solid tumors, including metastatic non-small cell lung cancer, as well as gastroesophageal, bladder and microsatellite stable, and colorectal cancers. The company is also developing SLATE, an off-the-shelf immunotherapy candidate which is in Phase I/2 clinical study for the treatment of common solid tumors, including metastatic non-small cell lung cancer, colorectal cancer, pancreatic cancer, and other mutation-positive tumors. Gritstone Oncology, Inc. has a strategic collaboration with bluebird bio, Inc. The company was founded in 2015 and is headquartered in Emeryville, California.