Cytomx Therapeutics Inc. and Regeneron Pharmaceuticals Inc., which inked a bispecifics-focused collaboration worth up to $2 billion in 2022, agreed to broaden their efforts in an expanded deal that provides Cytomx with additional funding up front as it advances its promising colorectal cancer candidate, varsetatug masetecan (Varseta-M), and fills the gap left by the recently terminated agreement with Astellas Pharma Inc.