Generation Bio Co. is a biotechnology company. The Company is innovating non-viral genetic medicines to provide durable, redosable treatments for hundreds of millions of patients living with rare and prevalent diseases. The Company is developing two distinct and complementary platforms: a potent, highly selective cell-targeted lipid nanoparticle (ctLNP) delivery system and a novel immune-quiet DNA (iqDNA) cargo produced by a scalable capsid-free manufacturing process that uses proprietary cell-free rapid enzymatic synthesis (RES). The Company is advancing a portfolio of programs guided by the potent and highly selective delivery of messenger ribonucleic acid (mRNA) and/or iqDNA using its ctLNP delivery system to target T cells, hematopoietic stem cells (HSCs), and hepatocytes, and intend to expand to additional tissues and cell types. Its work in T cells focuses on in vivo reprogramming of this cell type to treat cancer and autoimmune diseases.