United States · 
Who invested in Plexxikon?
Plexxikon's investors include Walden International, Advanced Technology Ventures, Alta Partners, Gimv and NIF Ventures, and 2 more on record.
United States · Series B startup
Who invested in Plexxikon
Funding summaryUpdated 26 Oct 2026
$46Mraised across 1 round since 2004, from 1 source
- Latest round
- Series B, $46MMay 2004
- Investors
- 7
The rounds
- May 2004Series B$46M
- Walden International
Advanced Technology Ventures
Alta Partners
Gimv- NIF Ventures
A. M. Pappas & Associates- CW Ventures
From a historical funding record
The exit
ExitBuyerPriceWhen
From historical deal records. Wrong? Tell us.
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Also claim to have backed them
This firm lists Plexxikon as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above.
Quick answers about Plexxikon
How much has Plexxikon raised?
Plexxikon has raised $46M across 1 round since 2004.
When did Plexxikon last raise?
Plexxikon's most recent round was a Series B of $46M in May 2004.
What was Plexxikon's biggest round?
Its most recent round, $46M in May 2004, is also its largest on record.
Who backed Plexxikon first?
Plexxikon's first round on record, in May 2004, was backed by Walden International, Advanced Technology Ventures and Alta Partners and 4 others.
What stage is Plexxikon at?
Plexxikon's latest named round is a Series B, in May 2004.
Where is Plexxikon based?
Plexxikon is based in the United States.
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