Lyell Immunopharma, Inc., a clinical-stage cell therapy company, engages in developing T-cell reprogramming technologies for patients with solid tumors. It develops therapies using an ex vivo genetic reprogramming technologies, such as c-Jun overexpression and NR4A3 gene knockout, to endow resistance to T-cell exhaustion; and an ex vivo epigenetic reprogramming technologies, including Epi-R to generate population of T cells with durable stemness, and Stim-R, a proprietary synthetic cell mimetic. The company's pipeline includes LYL797, a genetically and epigenetically reprogrammed ROR1 chimeric antigen receptor (CAR) T-cell product candidate for the treatment of various solid tumors; LYL845, an epigenetically reprogrammed tumor-infiltrating lymphocytes product candidate that targets multiple solid tumors; LYL119, a CAR T-cell product candidate for enhanced cytotoxicity. The company was incorporated in 2018 and is headquartered in South San Francisco, California.