United States · 
Who invested in Tolerx?
Tolerx's investors include Rho Capital Partners, HealthCare Ventures, Skyline Ventures, Sprout Group and Vertex Holdings, and 9 more on record.
2003200520072009
$17MSeries B$35MSeries C$61MSeries D$1.5MVentureUnited States · Venture startup
Who invested in Tolerx
4 rounds we have observed, with the 14 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.
Funding summaryUpdated 26 Oct 2026
$115Mraised across 4 rounds since 2001, from 4 sources
$17MSeries B$35MSeries C$61MSeries D$1.5MVenture
- Latest round
- Venture, $1.5MDec 2010
- Biggest round
- $61MSeries D · Oct 2006
- Investors
- 14
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 B, $17M Oct 2001
- Biggest round
- $61M Series D · Oct 2006
- Usual gap between rounds
- 3.8 years the median of 3
The rounds
- Dec 2010
- Oct 2006Series D$61M5 new7 returning
Rho Capital Partners- HealthCare Ventures
Skyline Ventures
Sprout Group
Vertex Holdings- Lehman Brothers Venture Partners
- NIF Ventures
- Yasuda Enterprise Development
Duke University
Genentech- Bear Stearns Health Innoventures L.P
Aozora Bank Ltd.
From a historical funding record
- Jan 2003Series C$35M5 new2 returning
Mizuho Capital- Rho Capital Partners
- HealthCare Ventures
- Sprout Group
- Vertex Holdings
- Yasuda Enterprise Development
- Aozora Bank Ltd.
From a historical funding record
- Oct 2001Series B$17M4 new
From a historical funding record
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.
Everyone who backed them
HealthCare VenturesGrowth equity3rounds
Yasuda Enterprise DevelopmentVC firm2rounds
Lehman Brothers Venture PartnersVC firm1round
NIF VenturesGrowth equity1round
Bear Stearns Health Innoventures L.PVC firm1round
Missing a round, or an investor who was in one? Tell us.
Quick answers about Tolerx
How much has Tolerx raised?
Tolerx has raised $115M across 4 rounds since 2001.
When did Tolerx last raise?
Tolerx's most recent round was a Venture of $1.5M in Dec 2010.
What was Tolerx's biggest round?
Tolerx's largest round on record is $61M (Series D), in Oct 2006.
Who backed Tolerx first?
Tolerx's first round on record, in Oct 2001, was backed by Vertex Ventures China, Rho Capital Partners and HealthCare Ventures and 1 others.
What stage is Tolerx at?
Tolerx's latest named round is a Venture, in Dec 2010.
Where is Tolerx based?
Tolerx is based in the United States.
Companies like Tolerx
In the same sector, and raised in the last eighteen months.
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