# Synthorx funding: rounds and investors > Synthorx has raised $79M across 3 rounds since 2014. Investors include Correlation Ventures, RA Capital Management and Avalon Ventures. Source: https://millionrounds.com/company/synthorx (Millionrounds; every figure on the page links to its filing or article) United States · [Series C startup](https://millionrounds.com/companies) # Who invested in *Synthorx* 3 rounds we have observed, with the 7 investors 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. Biotech Healthcare Funding summary Updated 26 Oct 2026 **$79M** raised across 3 rounds since 2014, from 3 sources **$6.0M** Series A **$10M** Series B **$63M** Series C - **Latest round:** Series C, $63M Apr 2018 - **Step-up i:** 6.3× - **Investors:** 7 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. 2015 2016 2017 2018 **$6.0M** Series A **$10M** Series B **$63M** Series C - **First round:** Series A, $6.0M - **Biggest round:** $63M - **Usual gap between rounds:** 2.3 years ## The rounds - **Apr 2018** Series C **$63M** *4 new* *1 returning* [Correlation Ventures](https://millionrounds.com/fund/correlation-ventures) [Osage University Partners](https://millionrounds.com/fund/osage-university-partners) [Avalon](https://millionrounds.com/fund/avalon) OrbiMed/ Medicxi RA Reported by FinSMEs SEC filing: $27M sold, first sale Apr 2018 - **Jul 2016** Series B **$10M** *1 new* [RA Capital Management](https://millionrounds.com/fund/ra-capital-management) Reported by Xconomy SEC filing: $5.0M sold, first sale Jul 2016 - **Apr 2014** Series A **$6.0M** *2 new* [Correlation Ventures](https://millionrounds.com/fund/correlation-ventures) [Avalon Ventures](https://millionrounds.com/fund/avalon-ventures) From a historical funding record SEC filing: $3.1M sold, first sale May 2014 ## Founders and team From the SEC filings it signed: 1 on the team. - **Laura Shawver** Executive Officer, Director i On the board, as filed i *Andrew Levin* *Floyd Romesberg* *Jay Lichter* *Peter Thompson* ## Who was in which round The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led. **Series A** 2014 **Series B** 2016 **Series C** 2018 [Correlation Ventures](https://millionrounds.com/fund/correlation-ventures) [RA Capital Management](https://millionrounds.com/fund/ra-capital-management) [Avalon Ventures](https://millionrounds.com/fund/avalon-ventures) [Osage University Partners](https://millionrounds.com/fund/osage-university-partners) [Avalon](https://millionrounds.com/fund/avalon) OrbiMed/ Medicxi RA ## Everyone who backed them [Correlation Ventures](https://millionrounds.com/fund/correlation-ventures) VC firm **2** rounds [RA Capital Management](https://millionrounds.com/fund/ra-capital-management) Private equity **1** round [Avalon Ventures](https://millionrounds.com/fund/avalon-ventures) VC firm **1** round [Osage University Partners](https://millionrounds.com/fund/osage-university-partners) VC firm **1** round [Avalon](https://millionrounds.com/fund/avalon) Hedge fund **1** round OrbiMed/ Medicxi no record of our own yet **1** round RA no record of our own yet **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=synthorx). ## Also claim to have backed them This firm lists Synthorx as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above. [Myeloma Investment Fund](https://millionrounds.com/fund/myeloma-investment-fund) Corporate VC Per its own site ## Quick answers about Synthorx ### Who invested in Synthorx? Synthorx's investors include Correlation Ventures, RA Capital Management, Avalon Ventures, Osage University Partners and Avalon, and 2 more on record. ### How much has Synthorx raised? Synthorx has raised $79M across 3 rounds since 2014. ### When did Synthorx last raise? Synthorx's most recent round was a Series C of $63M in Apr 2018. ### What was Synthorx's biggest round? Its most recent round, $63M in Apr 2018, is also its largest on record. ### Who backed Synthorx first? Synthorx's first round on record, in Apr 2014, was backed by Correlation Ventures and Avalon Ventures. ### What stage is Synthorx at? Synthorx's latest named round is a Series C, in Apr 2018. ### Where is Synthorx based? Synthorx is based in the United States. ## Companies like Synthorx In the same sector, and raised in the last eighteen months. [**Star Therapeutics** $325M · Oct 2026](https://millionrounds.com/company/star-therapeutics)[**Promaxo** $106M · Oct 2026](https://millionrounds.com/company/promaxo)[**Prolific Machines** $105M · Oct 2026](https://millionrounds.com/company/prolific-machines)[**AI** $18M · Oct 2026](https://millionrounds.com/company/ai)[**Baba** $40M · Oct 2026](https://millionrounds.com/company/baba)[**IMIO** $19M · Oct 2026](https://millionrounds.com/company/imio) ## 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