United States · Who invested in Adnexus?
Adnexus's investors include Atlas Venture, Polaris Partners, Venrock, Flagship Pioneering, LLC and HBM BioVentures, and 1 more on record.
20032004200520062007
$13MSeries A$27MSeries B$16MSeries CUnited States · Series C startup
Who invested in Adnexus
3 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
$56Mraised across 3 rounds since 2003, from 3 sources
$13MSeries A$27MSeries B$16MSeries C
- Latest round
- Series C, $16MAug 2007
- Biggest round
- $27MSeries B · Jun 2006
- 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
- Series A, $13M Jan 2003
- Biggest round
- $27M Series B · Jun 2006
- Usual gap between rounds
- 3.5 years the median of 2
The rounds
- Aug 2007Series C$16M1 new4 returning
Reported by adnexustx.com
- Jun 2006Series B$27M2 new2 returning
Reported by adnexustx.com
- Jan 2003
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 A2003Series B2006Series C2007
Atlas Venture
Polaris Partners
VenrockFlagship Pioneering, LLCHBM BioVenturesFlagship Ventures
Atlas VenturePolaris PartnersVenrockFlagship Pioneering, LLCHBM BioVenturesFlagship VenturesExits
ExitBuyerPriceWhen
From historical deal records. Wrong? Tell us.
Everyone who backed them
Flagship Pioneering, LLCVC firm2rounds
HBM BioVenturesGrowth equity1round
Flagship VenturesAccelerator1round
Missing a round, or an investor who was in one? Tell us.
Quick answers about Adnexus
How much has Adnexus raised?
Adnexus has raised $56M across 3 rounds since 2003.
When did Adnexus last raise?
Adnexus's most recent round was a Series C of $16M in Aug 2007.
What was Adnexus's biggest round?
Adnexus's largest round on record is $27M (Series B), in Jun 2006.
Who backed Adnexus first?
Adnexus's first round on record, in Jan 2003, was backed by Atlas Venture, Polaris Partners and Flagship Ventures.
What stage is Adnexus at?
Adnexus's latest named round is a Series C, in Aug 2007.
Where is Adnexus based?
Adnexus is based in the United States.
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