United States · 
Who invested in Cemaphore Systems?
Cemaphore Systems's investors include Mayfield Fund, Worldview Technology Partners and vSpring Capital.
2003200420052006200720082009
$8.0MSeries A$10MSeries B$1.2MDebtUnited States · Funded startup
Who invested in Cemaphore Systems
3 rounds we have observed, with the 3 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
$19Mraised across 3 rounds since 2003, from 3 sources
$8.0MSeries A$10MSeries B$1.2MDebt
- Latest round
- Debt, $1.2MMar 2009
- Biggest round
- $10MSeries B · Sept 2004
- 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 A, $8.0M May 2003
- Biggest round
- $10M Series B · Sept 2004
- Usual gap between rounds
- 4.5 years the median of 2
The rounds
- Mar 2009Debt$1.2M
No investor was named in the report.
From a historical funding recordSEC filing: $1.2M sold, first sale Mar 2009
- Sept 2004Series B$10M3 returning
From a historical funding record
- May 2003Series A$8.0M3 new
From a historical funding record
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
AcquiredSparxentundisclosedJul 2009
From historical deal records. Wrong? Tell us.
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Quick answers about Cemaphore Systems
How much has Cemaphore Systems raised?
Cemaphore Systems has raised $19M across 3 rounds since 2003.
When did Cemaphore Systems last raise?
Cemaphore Systems's most recent round was a Debt of $1.2M in Mar 2009.
What was Cemaphore Systems's biggest round?
Cemaphore Systems's largest round on record is $10M (Series B), in Sept 2004.
Who backed Cemaphore Systems first?
Cemaphore Systems's first round on record, in May 2003, was backed by Mayfield Fund, Worldview Technology Partners and vSpring Capital.
What stage is Cemaphore Systems at?
Cemaphore Systems's latest named round is a Debt, in Mar 2009.
Where is Cemaphore Systems based?
Cemaphore Systems is based in the United States.
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