United States · Who invested in Firefly Energy?
Firefly Energy's investors include KB Partners, Khosla Ventures, Infield Ventures, Stark and Heartland Capital Strategies, and 1 more on record.
2005200620072008
$4.0MSeries A$10MSeries B$15MSeries C$2.0MDebt
United States · Funded startup
Who invested in Firefly Energy
Funding summaryUpdated 26 Oct 2026
$31Mraised across 4 rounds since 2004, from 4 sources
$4.0MSeries A$10MSeries B$15MSeries C$2.0MDebt
- Latest round
- Debt, $2.0MOct 2008
- Biggest round
- $15MSeries C · Jun 2008
- 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, $4.0M Oct 2004
- Biggest round
- $15M Series C · Jun 2008
- Usual gap between rounds
- 19 months the median of 3
The rounds
- Oct 2008Debt$2.0M
No investor was named in the report.
From a historical funding record
- Jun 2008
- Nov 2006Series B$10M2 new1 returning
Reported by deals.venturebeat.com
- Oct 2004
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 A2004Series B2006Series C2008Debt2008
KB Partners
Khosla Ventures
Infield VenturesStark
Heartland Capital StrategiesUnited Defense, L.P.
KB PartnersKhosla VenturesInfield VenturesStarkHeartland Capital StrategiesUnited Defense, L.P.Everyone who backed them
StarkVC firm1round
United Defense, L.P.no record of our own yet1round
Missing a round, or an investor who was in one? Tell us.
Quick answers about Firefly Energy
How much has Firefly Energy raised?
Firefly Energy has raised $31M across 4 rounds since 2004.
When did Firefly Energy last raise?
Firefly Energy's most recent round was a Debt of $2.0M in Oct 2008.
What was Firefly Energy's biggest round?
Firefly Energy's largest round on record is $15M (Series C), in Jun 2008.
Who backed Firefly Energy first?
Firefly Energy's first round on record, in Oct 2004, was backed by KB Partners and United Defense, L.P..
What stage is Firefly Energy at?
Firefly Energy's latest named round is a Debt, in Oct 2008.
Where is Firefly Energy based?
Firefly Energy is based in the United States.
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