Sarepta Therapeutics, known for its focus on Duchenne muscular dystrophy, made a $500 million upfront deal with Arrowhead Pharmaceuticals, investing $325 million and up to $10 billion in milestones. The deal aims to diversify Sarepta's pipeline with RNA drugs and expand its portfolio into new disease areas. Despite Elevidys failing a confirmatory trial, Sarepta secured full FDA approval and a label expansion, generating $181 million in Q3. The deal reflects Sarepta's ability to secure regulatory success and diversify its portfolio, potentially offering new options for patients with rare diseases.