United States · 
Who invested in Flexus Biosciences?
Flexus Biosciences's investors include Kleiner Perkins Caufield & Byers, The Column Group and Celgene.
2015
$38MSeries B$15MVenture
United States · Venture startup
Who invested in Flexus Biosciences
Funding summaryUpdated 26 Oct 2026
$53Mraised across 2 rounds since 2014, from 2 sources
$38MSeries B$15MVenture
- Latest round
- Venture, $15MMar 2015
- Biggest round
- $38MSeries B · Dec 2014
- Investors
- 3
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 B, $38M Dec 2014
- Biggest round
- $38M Series B · Dec 2014
- Between rounds
- 3 months from the last two
The rounds
- Mar 2015Venture$15M
No investor was named in the report.
From a historical funding recordSEC filing: $15M sold, first sale Oct 2013
- Dec 2014Series B$38M3 new
From a historical funding recordSEC filing: $15M sold, first sale Oct 2013
Founders and team
From the SEC filings it signed: 3 on the team.
- Juan Carlos JaenExecutive Officer, Directori
- Luis Carlos BayolExecutive Officeri
- Terry RosenExecutive Officer, Directori
On the board, as filediBeth Carlos SeidenbergDave Carlos GoeddelWilliam Carlos Rieflin
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
From historical deal records. Wrong? Tell us.
Everyone who backed them
CelgeneGrowth equity1round
Missing a round, or an investor who was in one? Tell us.
Quick answers about Flexus Biosciences
How much has Flexus Biosciences raised?
Flexus Biosciences has raised $53M across 2 rounds since 2014.
When did Flexus Biosciences last raise?
Flexus Biosciences's most recent round was a Venture of $15M in Mar 2015.
What was Flexus Biosciences's biggest round?
Flexus Biosciences's largest round on record is $38M (Series B), in Dec 2014.
Who backed Flexus Biosciences first?
Flexus Biosciences's first round on record, in Dec 2014, was backed by Kleiner Perkins Caufield & Byers, The Column Group and Celgene.
What stage is Flexus Biosciences at?
Flexus Biosciences's latest named round is a Venture, in Mar 2015.
Where is Flexus Biosciences based?
Flexus Biosciences is based in the United States.
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