United States · 
Who invested in CoalTek?
CoalTek's investors include Lightspeed Venture Partners, DFJ, Braemar Energy Ventures and Technology Partners.
2007200820092010201120122013
$33MSeries C$750KRoundUnited States · Funded startup
Who invested in CoalTek
Funding summaryUpdated 26 Oct 2026
$34Mraised across 2 rounds since 2007, from 2 sources
$33MSeries C$750KRound
- Latest round
- Round, $750KAug 2013
- Biggest round
- $33MSeries C · Feb 2007
- Investors
- 4
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 C, $33M Feb 2007
- Biggest round
- $33M Series C · Feb 2007
- Between rounds
- 6.4 years from the last two
The rounds
- Aug 2013Round$750K2 new1 returning
Reported by marketbrief.comSEC filing: $750K sold, first sale Jul 2013
- Feb 2007
Founders and team
From the SEC filings it signed: 1 on the team.
- Daniel KuzmakExecutive Officeri
On the board, as filediChristopher PoirierIra EhrenpreisPeter NiehRaj AlturuWilliam Lese
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.
Everyone who backed them
Technology PartnersHedge fund1round
Missing a round, or an investor who was in one? Tell us.
Quick answers about CoalTek
How much has CoalTek raised?
CoalTek has raised $34M across 2 rounds since 2007.
When did CoalTek last raise?
CoalTek's most recent round was an Undisclosed round of $750K in Aug 2013.
What was CoalTek's biggest round?
CoalTek's largest round on record is $33M (Series C), in Feb 2007.
Who backed CoalTek first?
CoalTek's first round on record, in Feb 2007, was backed by Lightspeed Venture Partners and DFJ.
What stage is CoalTek at?
CoalTek's latest named round is an Undisclosed round, in Aug 2013.
Where is CoalTek based?
CoalTek is based in the United States.
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