Siren Biotechnology

Turning deadly cancers into treatable diseases, backed by Founders Fund

https://wefunder.com/siren.biotechnology

Total raised on Wefunder: 4058119

Total investors: 1503

Quick facts

  • $28M raised from leading VCs including Founders Fund, Lux Capital, and more
  • Fighting the world’s second deadliest disease, cancer, with AAV immuno-gene therapy
  • Led by expert doctors and scientists from Stanford, UCSF, Duke, Mount Sinai, and Roche
  • 2025 Start Up of The Year winner at Phacilitate Advanced Therapies Week
  • $4M in competitive grant awards from the California Institute for Regenerative Medicine (CIRM)
  • Targeting clinical trials in 2026, a critical step toward FDA approval and commercialization
  • The global brain tumor therapeutics market is a $3.2B market
  • CEO featured in The Wall Street Journal, The Economist, WIRED, MIT Tech Review, and Boston Globe

Team profiles

Featured investor profiles

Siren Biotechnology

Turning deadly cancers into treatable diseases, backed by Founders Fund

What Investors Say

LEAD INVESTOR
Invested $200,000 this round
Siren Biotechnology is bringing groundbreaking cancer therapies to patients in need. They are developing a brand new class of therapies that is set to transform the treatment landscape for some of the deadliest cancers. The Siren Biotechnology team is equipped with world-class gene therapy and oncology expertise, and their data to date shows immense promise in treating deadly brain cancers. Our investment is an expression of confidence in Siren Biotechnology's scientific innovation, their ability to navigate the complexities of the regulatory landscape, and their power to deliver on the massive potential of AAV immuno-gene therapy for patients.
What People Say