R1 Therapeutics (Series A Extension)
Funding Details
Awarder
Inbox
Date Award
September 30, 2026
Vertical
Biopharmaceuticals
Funding Amount
$80,500,000
Company Info
Market
Kidney Disease
Location
San Francisco, California, United States
Coinvestors
Samsara BioCapital
Company Description

R1 Therapeutics is a clinical-stage biopharmaceutical company focusing on the development of first-in-class therapies for patients with kidney disease. Its lead program, AP306, targets hyperphosphatemia in patients with chronic kidney disease on dialysis, a condition associated with serious bone and cardiovascular complications and poorer outcomes when phosphate remains uncontrolled.

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