• Expands the Company’s expertise in targeting pan-KRAS and other drivers of hard-to-treat cancers
• Acquisition adds a proprietary degrader antibody conjugate platform designed to overcome key limitations of existing therapeutic approaches
• Strengthens leadership in next-generation antibody engineering to accelerate oncology innovation
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.”
Johnson & Johnson is at the forefront of oncology therapies
For more than three decades, Johnson & Johnson has advanced innovative therapies to address some of the most complex cancers and improve outcomes for patients worldwide. Firefly Bio Inc.’s capabilities in emerging modalities complement Johnson & Johnson’s existing expertise in antibody engineering and accelerates the Company’s pioneering of more effective, durable treatments.
About the agreement
Under the terms of the agreement, Johnson & Johnson will acquire Firefly Bio, Inc. for $1 billion in cash. The closing of the transaction is expected to occur later this year, subject to applicable regulatory approvals and other customary closing conditions. The accounting treatment will be communicated on or before the close of the transaction.
About Johnson & Johnson
At Johnson & Johnson, we believe health is everything. Our strength in healthcare innovation empowers us to build a world where complex diseases are prevented, treated, and cured, where treatments are smarter and less invasive, and solutions are personal. Through our expertise in Innovative Medicine and MedTech, we are uniquely positioned to innovate across the full spectrum of healthcare solutions today to deliver the breakthroughs of tomorrow and profoundly impact health for humanity.