Alumis and ACELYRIN to Merge, Forming Biopharma Leader in Immune-Mediated Diseases

Alumis Inc. a clinical-stage biopharmaceutical company developing therapies using a precision approach to optimize clinical outcomes and significantly improve the lives of patients with immune-mediated diseases, and ACELYRIN, INC. a late-stage clinical biopharma company focused on accelerating the development and delivery of transformative medicines in immunology, announced a definitive merger agreement under which Alumis and ACELYRIN will merge in an all-stock transaction.

Martin Babler, President, Chief Executive Officer and Chairman of Alumis, said, “Through this combination with ACELYRIN, Alumis will have the financial flexibility and runway to advance an expanded late-stage pipeline, now including lonigutamab, and build commercial capabilities. Since completing our IPO, Alumis has operated with speed and rigor, and the multiple development milestones expected in 2025 and 2026, coupled with potential additional indications for ESK-001, represent exciting breakthroughs for our patients and value-driving opportunities for the combined company’s stockholders. As we move forward together, we will maintain financial discipline and a flexible capital allocation strategy with the goal of maximizing the value of our highly differentiated portfolio.”

Bruce Cozadd, Chair of the ACELYRIN Board of Directors and member of the Board Transaction Committee said, “This merger represents the culmination of a thorough strategic review process by our Board and management team to determine the best and most value-maximizing path forward for ACELYRIN. We are confident that Alumis is the right partner to optimize the development of lonigutamab and together deliver long-term stockholder value.”

“We are pleased to join with Alumis and further advance our mission of developing and delivering transformative medicines in immunology,” said Mina Kim, Chief Executive Officer of ACELYRIN. “This merger brings together two complementary organizations and pipelines, enabling the company to leverage the benefits of combined development and commercial expertise, as well as catalyst diversification, to achieve even more together. I am deeply grateful to the entire ACELYRIN team, whose efforts have made today’s milestone possible, and am excited that Alumis shares our mission of providing patients with life-changing new treatment options.”

Alumis and ACELYRIN had cash, cash equivalents and marketable securities of approximately $289 million and approximately $448 million, respectively, on a preliminary basis, as of December 31, 2024. With a pro forma cash position of approximately $737 million as of December 31, 2024, and continued operating discipline, Alumis expects that this cash position provides runway to advance the combined company’s pipeline through multiple planned key data readouts across several clinical trials and to fund operating expenses and capital expenditure requirements into 2027.

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