Longevity startup Retro Biosciences says latest fundraising values it at $1.8 billion Sam Altman-backed company is seeking to add 10 health years to human lifespan

https://www.statnews.com/2026/05/22/retro-biosciences-longevity-valuation/ By Allison DeAngelisMay 22, 2026 Biotech Startups and Venture Capital Reporter