United States · 
Who invested in Sirna Therapeutics?
Sirna Therapeutics's investors include Venrock, GGV Capital, Granite Ventures, Oxford Bioscience Partners and Sprout Group, and 1 more on record.
20042005
$48MVenture$28MVentureUnited States · Venture startup
Who invested in Sirna Therapeutics
2 rounds we have observed, with the 6 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
$76Mraised across 2 rounds since 2003, from 2 sources
$48MVenture$28MVenture
- Latest round
- Venture, $28MJul 2005
- Biggest round
- $48MVenture · Apr 2003
- Investors
- 6
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Venture, $48M Apr 2003
- Biggest round
- $48M Venture · Apr 2003
- Between rounds
- 2.2 years from the last two
The rounds
- Jul 2005
- Apr 2003Venture$48M6 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.
The exit
ExitBuyerPriceWhen
AcquiredMerck & Co.$1.1BOct 2006
From historical deal records. Wrong? Tell us.
Everyone who backed them
Oxford Bioscience PartnersGrowth equity1round
Techno Venture ManagementVC firm1round
Missing a round, or an investor who was in one? Tell us.
Quick answers about Sirna Therapeutics
How much has Sirna Therapeutics raised?
Sirna Therapeutics has raised $76M across 2 rounds since 2003.
When did Sirna Therapeutics last raise?
Sirna Therapeutics's most recent round was a Venture of $28M in Jul 2005.
What was Sirna Therapeutics's biggest round?
Sirna Therapeutics's largest round on record is $48M (Venture), in Apr 2003.
Who backed Sirna Therapeutics first?
Sirna Therapeutics's first round on record, in Apr 2003, was backed by Venrock, GGV Capital and Granite Ventures and 3 others.
What stage is Sirna Therapeutics at?
Sirna Therapeutics's latest named round is a Venture, in Jul 2005.
Where is Sirna Therapeutics based?
Sirna Therapeutics is based in the United States.
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