United States · Who invested in Sionex?
Sionex's investors include Rho Capital Partners, Navigator Technology Ventures, Morgenthaler Ventures, Dow Venture Capital and TechFarm.
200320042005
$3.6MSeries A$13MSeries B$12MSeries CUnited States · Series C startup
Who invested in Sionex
3 rounds we have observed, with the 5 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
$28Mraised across 3 rounds since 2002, from 3 sources
$3.6MSeries A$13MSeries B$12MSeries C
- Latest round
- Series C, $12MDec 2005
- Biggest round
- $13MSeries B · Nov 2003
- Investors
- 5
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, $3.6M Jun 2002
- Biggest round
- $13M Series B · Nov 2003
- Usual gap between rounds
- 2.1 years the median of 2
The rounds
- Dec 2005Series C$12M1 new3 returning
Reported by sionex.com
- Nov 2003Series B$13M1 new2 returning
From a historical funding record
- Jun 2002Series A$3.6M3 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.
Series A2002Series B2003Series C2005
Rho Capital PartnersNavigator Technology Ventures
Morgenthaler Ventures
Dow Venture Capital
TechFarm
Rho Capital PartnersNavigator Technology VenturesMorgenthaler VenturesDow Venture CapitalTechFarmEveryone who backed them
Navigator Technology VenturesGrowth equity3rounds
Missing a round, or an investor who was in one? Tell us.
Quick answers about Sionex
How much has Sionex raised?
Sionex has raised $28M across 3 rounds since 2002.
When did Sionex last raise?
Sionex's most recent round was a Series C of $12M in Dec 2005.
What was Sionex's biggest round?
Sionex's largest round on record is $13M (Series B), in Nov 2003.
Who backed Sionex first?
Sionex's first round on record, in Jun 2002, was backed by Rho Capital Partners, Navigator Technology Ventures and TechFarm.
What stage is Sionex at?
Sionex's latest named round is a Series C, in Dec 2005.
Where is Sionex based?
Sionex is based in the United States.
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