ACELYRIN

ACELYRIN, INC. is a late-stage clinical biopharmaceutical company focused on developing transformative medicines for immunology and inflammatory diseases. The company's lead product candidate is izokibep, a next-generation inhibitor of interleukin-17A (IL-17A) designed to overcome limitations of monoclonal antibodies. Izokibep is being evaluated in multiple late-stage trials for moderate-to-severe hidradenitis suppurativa (HS), psoriatic arthritis (PsA), and noninfectious uveitis.

In March 2024, ACELYRIN reported positive top line data from a global Phase 2 billion/3 clinical trial of izokibep in PsA, meeting the primary endpoint of ACR50 at 16 weeks with high statistical significance. The trial also demonstrated robust clinical responses for higher hurdle endpoints like ACR70, PASI100, and composite measures, indicating izokibep's potential to provide clinically meaningful benefits. Additionally, ACELYRIN announced differentiated long-term 32-week data from a global Phase 2 billion trial of izokibep in HS, showing rapid, dose-ordered improvement across multiple disease manifestations, including HiSCR100 achieved earlier than reported by other IL-17 inhibitors.

ACELYRIN's other late-stage asset is lonigutamab, a subcutaneously delivered monoclonal antibody targeting IGF-1R being investigated for the treatment of thyroid eye disease (TED). In March 2024, ACELYRIN announced positive proof-of-concept data from a Phase 1/2 trial, demonstrating rapid improvements in proptosis and clinical activity score within three weeks after the first dose.

As of December 31, 2023, ACELYRIN had cash, cash equivalents, and short-term marketable securities totaling USD 721.3 million, providing a runway to support key late-stage data milestones and registrational studies across multiple indications. In January 2023, ACELYRIN acquired ValenzaBio, adding lonigutamab and other immunology assets to its pipeline.