R1 Therapeutics

Transforming the treatment of hyperphosphatemia in patients with chronic kidney disease.

Investment Team

Sector

Life Sciences

Category

Therapeutics

Status

Private

Location

Redwood City, CA

Initial Investment

2026
Transforming the treatment of hyperphosphatemia in patients with chronic kidney disease.

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. AP306 is a first-in-class pan phosphate active transporter inhibitor with the potential to deliver rapid and effective phosphate lowering with a significantly reduced treatment burden. R1 is advancing AP306 in a global Phase 2b development program.