United Kingdom · 
Who invested in siXis?
siXis's investors include Intersouth Partners and RTI International.
2009
$5.0MSeries A$3.0MVenture
United Kingdom · Venture startup
Who invested in siXis
Funding summaryUpdated 26 Oct 2026
$8.0Mraised across 2 rounds since 2008, from 2 sources
$5.0MSeries A$3.0MVenture
- Latest round
- Venture, $3.0MOct 2009
- Biggest round
- $5.0MSeries A · Jun 2008
- Investors
- 2
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, $5.0M Jun 2008
- Biggest round
- $5.0M Series A · Jun 2008
- Between rounds
- 16 months from the last two
The rounds
- Oct 2009Venture$3.0M
No investor was named in the report.
From a historical funding recordSEC filing: $3.0M sold, first sale Sept 2009
- Jun 2008
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
Missing a round, or an investor who was in one? Tell us.
Quick answers about siXis
How much has siXis raised?
siXis has raised $8.0M across 2 rounds since 2008.
When did siXis last raise?
siXis's most recent round was a Venture of $3.0M in Oct 2009.
What was siXis's biggest round?
siXis's largest round on record is $5.0M (Series A), in Jun 2008.
Who backed siXis first?
siXis's first round on record, in Jun 2008, was backed by Intersouth Partners and RTI International.
What stage is siXis at?
siXis's latest named round is a Venture, in Oct 2009.
Where is siXis based?
siXis is based in the United Kingdom.
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