Boundless Bio, Inc., biopharma company, develops therapies and medicines for the treatment of cancers. It offers therapeutics based on extrachromosomal DNA (ecDNA) one of the drivers of the aggressive cancers, such as cancers characterized by high copy number amplification of oncogenes. The company was formerly known as Pretzel Therapeutics, Inc. Boundless Bio, Inc. was founded in 2018 and is based in LA Jolla, California.