United States · Who invested in SiOnyx?
SiOnyx's investors include Harris & Harris Group, Polaris Partners, Crosslink Capital, In-Q-Tel and Vulcan Capital.
200720082009201020112012
$750KSeed$13MSeries B$6.9MVenture
United States · Venture startup
Who invested in SiOnyx
Funding summaryUpdated 26 Oct 2026
$20Mraised across 3 rounds since 2006, from 3 sources
$750KSeed$13MSeries B$6.9MVenture
- Latest round
- Venture, $6.9MApr 2012
- Biggest round
- $13MSeries B · Oct 2010
- 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
- Seed, $750K Jun 2006
- Biggest round
- $13M Series B · Oct 2010
- Usual gap between rounds
- 4.3 years the median of 2
The rounds
- Apr 2012
- Oct 2010Series B$13M3 new1 returning
Reported by masshightech.comSEC filing: $6.3M sold, first sale Jun 2010
- Jun 2006
Founders and team
From the SEC filings it signed: 3 on the team.
- James E CareyExecutive Officeri
- John E ZiolkowskiExecutive Officeri
- Stephen D SaylorExecutive Officer, Directori
On the board, as filediDaniel E WolfeJill E WatzMichael E HawleyRobert E Metcalfe
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.
Seed2006Series B2010Venture2012Harris & Harris Group
Polaris Partners
Crosslink Capital
In-Q-Tel
Vulcan Capital
Polaris PartnersCrosslink CapitalIn-Q-TelVulcan CapitalEveryone who backed them
Harris & Harris GroupGrowth equity2rounds
Missing a round, or an investor who was in one? Tell us.
Quick answers about SiOnyx
How much has SiOnyx raised?
SiOnyx has raised $20M across 3 rounds since 2006.
When did SiOnyx last raise?
SiOnyx's most recent round was a Venture of $6.9M in Apr 2012.
What was SiOnyx's biggest round?
SiOnyx's largest round on record is $13M (Series B), in Oct 2010.
Who backed SiOnyx first?
SiOnyx's first round on record, in Jun 2006, was backed by Harris & Harris Group.
What stage is SiOnyx at?
SiOnyx's latest named round is a Venture, in Apr 2012.
Where is SiOnyx based?
SiOnyx is based in the United States.
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