Regeneron Pharmaceuticals, Inc. entered an agreement to acquire Checkmate Pharmaceuticals, Inc., a clinical stage biopharma company focused on technology to harness the immune system to combat cancer, for approximately $250 million in cash.
 
Checkmate’s lead investigational candidate is vidutolimod, an advanced generation CpG-A oligodeoxynucleotide Toll-like receptor 9 (TLR9) agonist delivered in a virus-like particle.
 
“As we continue to advance and expand our research efforts in immuno-oncology, the acquisition of Checkmate will add a promising new modality to Regeneron’s toolkit of potential approaches for difficult-to-treat cancers,” said Leonard S. Schleifer, M.D., Ph.D., President and Chief Executive Officer of Regeneron. “The unique combination of a differentiated Toll-like receptor 9 with other antibody-based oncology agents may result in increased clinical benefit and provide new treatment options for patients in need. We look forward to welcoming the Checkmate team and their complementary scientific acumen to the Regeneron family.”
 
“We are thrilled that Checkmate will become part of Regeneron, a biotechnology leader that shares our deep appreciation for science, hunger for ground-breaking discoveries and commitment to helping patients defeat cancer,” said Alan Bash, President and Chief Executive Officer of Checkmate.
 
“We believe that the data we have generated with vidutolimod positions Checkmate at the forefront of the innate immune activator field. It is our hope that Regeneron’s resources and expertise will help accelerate the development of vidutolimod and realization of the full potential of our virus-like particle (VLP) platform for immunotherapy,” said Art Krieg, M.D., Checkmate’s Founder and Chief Scientific Officer.
 
Vidutolimod is administered into the tumor and is believed to induce and expand anti-tumor T cells and induce tumor regression as a monotherapy in patients whose tumors previously progressed on PD-1 checkpoint inhibition. In the Phase 1b program, documented abscopal responses were seen in distant, un-injected lesions. Vidutolimod is an investigational therapy.
 
Subject to customary closing conditions, the transaction is expected to close in mid-2022.