United States · 
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.
2015201620172018
$6.0MSeries A$10MSeries B$63MSeries CUnited States · Series C startup
Who invested in Synthorx
Funding summaryUpdated 26 Oct 2026
$79Mraised across 3 rounds since 2014, from 3 sources
$6.0MSeries A$10MSeries B$63MSeries C
- Latest round
- Series C, $63MApr 2018
- Step-upi
- 6.3×
- Investors
- 7
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Series A, $6.0M Apr 2014
- Biggest round
- $63M Series C · Apr 2018
- Usual gap between rounds
- 2.3 years the median of 2
The rounds
- Apr 2018Series C$63M4 new1 returning
Correlation Ventures
Osage University Partners
Avalon- OrbiMed/ Medicxi
- RA
Reported by FinSMEsSEC filing: $27M sold, first sale Apr 2018
- Jul 2016Series B$10M1 new
Reported by XconomySEC filing: $5.0M sold, first sale Jul 2016
- Apr 2014Series A$6.0M2 new
From a historical funding recordSEC filing: $3.1M sold, first sale May 2014
Founders and team
From the SEC filings it signed: 1 on the team.
- Laura ShawverExecutive Officer, Directori
On the board, as filediAndrew LevinFloyd RomesbergJay LichterPeter 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 A2014Series B2016Series C2018Correlation Ventures
RA Capital ManagementAvalon VenturesOsage University PartnersAvalonOrbiMed/ MedicxiRA
Correlation VenturesRA Capital ManagementAvalon VenturesOsage University PartnersAvalonOrbiMed/ MedicxiRAEveryone who backed them
Avalon VenturesVC firm1round
OrbiMed/ Medicxino record of our own yet1round
RAno record of our own yet1round
Missing a round, or an investor who was in one? Tell us.
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.
Quick answers about Synthorx
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.
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