35Pharma Inc. is a Canada-based, private clinical-stage biopharmaceutical company headquartered in Montreal, Quebec, specializing in the development of novel protein-based therapeutics targeting the TGF-beta superfamily, particularly Activin and GDF ligand traps.
The company's lead candidate, HS235, is a next-generation activin signaling inhibitor designed for enhanced selectivity to minimize risks like bleeding associated with BMP9/10 binding. HS235 has completed Phase I trials in healthy volunteers, demonstrating fat-selective weight loss, lean mass preservation, and improved insulin sensitivity. Proof-of-concept studies are initiating in pulmonary arterial hypertension (PAH) and pulmonary hypertension due to heart failure with preserved ejection fraction (PH-HFpEF).
In February 2026, GSK announced the acquisition of 35Pharma for $950 million in cash, recently completed, to accelerate HS235 development and expand its respiratory and immunology portfolio. An earlier-stage candidate, HS370, targets heart failure and obesity.
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35 Pharma.
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