# Retro Biosciences funding: rounds and investors > Retro Biosciences has raised $1.2B across 3 rounds since 2022. Investors include Sam Altman. Every round with its source. Source: https://millionrounds.com/company/retro-biosciences (Millionrounds; every figure on the page links to its filing or article) United States · [Venture startup](https://millionrounds.com/companies) # Who invested in *Retro Biosciences* 3 rounds we have observed, with the one investor named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it. AI Biotech Pharma Wellness Raised 6 months ago Follow Retro Biosciences and see its new rounds in your feed. [Start following](https://millionrounds.com/login?join=1&why=follow&next=%2Fcompany%2Fretro-biosciences) Funding summary Updated 5 Nov 2026 **$1.2B** raised across 3 rounds since 2022, from 3 sources **$180M** Pre-seed **$1.0B** Series A - **Latest round:** Venture May 2026 - **Biggest round:** $1.0B Series A · Jan 2025 - **Investors:** 1 See who backed them ## The funding story Each circle is a round, placed by date and sized by amount. The line above is the running total. 2022 2023 2024 2025 2026 **$180M** Pre-seed **$1.0B** Series A **?** Venture - **First round:** Pre-seed, $180M - **Biggest round:** $1.0B - **Usual gap between rounds:** 2.8 years ## The rounds - **May 2026** Venture **Amount undisclosed** *1 returning* [Sam Altman](https://millionrounds.com/fund/sam-altman) Source recorded - **Jan 2025** Series A **$1.0B** *1 returning* [Sam Altman](https://millionrounds.com/fund/sam-altman) Reported by TechCrunch - **Apr 2022** Pre-seed **$180M** *1 new* [Sam Altman](https://millionrounds.com/fund/sam-altman) Source recorded ## Everyone who backed them [Sam Altman](https://millionrounds.com/fund/sam-altman) Angel **3** rounds Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=retro-biosciences). ## Also claim to have backed them These 7 firms list Retro Biosciences as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above. [SparkLabs Group](https://millionrounds.com/fund/sparklabs-group) VC firm Per its own site [Inventive Capital](https://millionrounds.com/fund/inventive-capital) Family office Per its own site [LFG Capital Management LLC](https://millionrounds.com/fund/lfg-capital-management-llc) Investor Per its own site [LFG Holdings](https://millionrounds.com/fund/lfg-ventures) VC firm Per its own site [Peter H. Diamandis (PHD Ventures)](https://millionrounds.com/fund/peter-h-diamandis-phd-ventures) Family office Per its own site [Prosto VC](https://millionrounds.com/fund/prosto-vc) Angel network Per its own site [Selective VC](https://millionrounds.com/fund/selective-vc) VC firm Per its own site ## Quick answers about Retro Biosciences ### Who invested in Retro Biosciences? Retro Biosciences's investors include Sam Altman. ### How much has Retro Biosciences raised? Retro Biosciences has raised $1.2B across 3 rounds since 2022. One round did not disclose an amount, so the total is a floor. ### When did Retro Biosciences last raise? Retro Biosciences's most recent round was a Venture in May 2026. ### What was Retro Biosciences's biggest round? Retro Biosciences's largest round on record is $1.0B (Series A), in Jan 2025. ### Who backed Retro Biosciences first? Retro Biosciences's first round on record, in Apr 2022, was backed by Sam Altman. ### What stage is Retro Biosciences at? Retro Biosciences's latest named round is a Venture, in May 2026. ### Where is Retro Biosciences based? Retro Biosciences is based in the United States. ## Companies like Retro Biosciences In the same sector, and raised in the last eighteen months. [**Journify** $12M · Nov 2026](https://millionrounds.com/company/journify)[**Nooks** $543M · Nov 2026](https://millionrounds.com/company/nooks)[**Laza Medical** $160M · Nov 2026](https://millionrounds.com/company/laza-medical)[**Guava** $13M · Nov 2026](https://millionrounds.com/company/guava)[**Applied Compute** $580M · Nov 2026](https://millionrounds.com/company/applied-compute)[**Agrani Labs** $123M · Nov 2026](https://millionrounds.com/company/agrani-labs) ## Find investors like these Search every investor by what they have actually funded, then narrow to your stage and market. Free. Open the investor searchOr these rounds in the app