Passage Bio, Inc., a genetic medicines company, develops transformative therapies for central nervous system diseases. It develops PBGM01, which utilizes a proprietary, AAVhu68 capsid to deliver to the brain and peripheral tissues a functional GLB1 gene encoding lysosomal acid beta-galactosidase for infantile GM1; PBFT02, which utilizes an AAV1 capsid to deliver to the brain a functional granulin (GRN) and gene encoding progranulin (PGRN) for the treatment of FTD-GRN; and PBKR03, which utilizes a proprietary, AAVhu68 capsid to deliver to the brain and peripheral tissues a functional GALC gene encoding the hydrolytic enzyme galactosylceramidase for infantile Krabbe disease. The company also develops PBML04 for the treatment of metachromatic leukodystrophy; PBAL05 for the treatment of amyotrophic lateral sclerosis; and PBCM06 for the treatment of Charcot-Marie-Tooth Type 2A. Passage Bio, Inc. has a strategic research collaboration with the Trustees of the University of Pennsylvania's Gene Therapy Program; and collaboration agreement, and a development services and clinical supply agreement with Catalent Maryland, Inc. The company was incorporated in 2017 and is headquartered in Philadelphia, Pennsylvania.