United States · Who invested in RadiumOne?
RadiumOne's investors include Trinity Ventures, Adams Street Partners, Crosslink Capital, Draper Esprit and Gurbaksh Chahal, and 2 more on record.
201020112012201320142015
$2.0MSeries A$2.0MSeed$21MSeries B$54MSeries CUnited States · Series C startup
Who invested in RadiumOne
4 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.
Funding summaryUpdated 26 Oct 2026
$79Mraised across 4 rounds since 2009, from 4 sources
$2.0MSeries A$2.0MSeed$21MSeries B$54MSeries C
- Latest round
- Series C, $54MJun 2015
- Step-upi
- 2.6×
- 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, $2.0M Sept 2009
- Biggest round
- $54M Series C · Jun 2015
- Usual gap between rounds
- 4.3 years the median of 2
The rounds
- Jun 2015Series C$54M1 new4 returning
From a historical funding recordSEC filing: $23M sold, first sale Jun 2015
- Mar 2011Series B$21M3 new2 returning
Reported by techcrunch.comSEC filing: $8.9M sold, first sale Mar 2011
- Sept 2009
- Sept 2009
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 A2009Seed2009Series B2011Series C2015
Trinity Ventures
Adams Street Partners
Crosslink Capital
Draper Esprit
Gurbaksh Chahal
DFJ Esprit
Harmony Partners
Trinity VenturesAdams Street PartnersCrosslink CapitalDraper EspritGurbaksh ChahalDFJ EspritHarmony PartnersEveryone who backed them
Missing a round, or an investor who was in one? Tell us.
Quick answers about RadiumOne
How much has RadiumOne raised?
RadiumOne has raised $79M across 4 rounds since 2009.
When did RadiumOne last raise?
RadiumOne's most recent round was a Series C of $54M in Jun 2015.
What was RadiumOne's biggest round?
Its most recent round, $54M in Jun 2015, is also its largest on record.
Who backed RadiumOne first?
RadiumOne's first round on record, in Sept 2009, was backed by Trinity Ventures, Adams Street Partners and Gurbaksh Chahal.
What stage is RadiumOne at?
RadiumOne's latest named round is a Series C, in Jun 2015.
Where is RadiumOne based?
RadiumOne is based in the United States.
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