Johnson & Johnson to Acquire Firefly Bio, Inc. to Expand Oncology Pipeline with Novel Degrader Antibody Conjugate Platform

(June 8, 2026) by J&J Global Media Relations

NEW BRUNSWICK, NJ (June 8, 2026) – Johnson & Johnson (NYSE: JNJ) today announced it has entered into a definitive agreement to acquire Firefly Bio, Inc., a biotechnology company advancing its proprietary Firelink™ degrader antibody conjugate (DAC) platform, for $1 billion in cash. The Firelink™ DAC platform for KRAS-driven tumors bolsters Johnson & Johnson’s oncology pipeline and ambition to develop targeted medicines for the most prevalent and hard-to-treat solid tumors with high unmet need1.

Antibody therapeutics have revolutionized the treatment of cancer through continuous innovations from monoclonal antibodies, to bi-and multi-specifics, antibody drug conjugates, and other antibody-based approaches. The Firelink™ DAC platform is a novel, innovative approach to overcome limitations of existing treatments by delivering a highly selective protein degrader to tumor cells, while avoiding healthy cells.

“KRAS has notoriously been considered an undruggable target and patients with KRAS-driven cancers continue to face limited treatment options with survival measured in months, not years,” said John Reed, M.D., Ph.D., Executive Vice President, Innovative Medicine, Research & Development, Johnson & Johnson. “We believe the proprietary Firelink™ platform will overcome the limitations of current treatments and diversify our pipeline with preclinical candidates for treating multiple types of solid tumors.”