Who invested in Windsor Circle

6 rounds we have observed, with the 5 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.

Martech

Funding summaryUpdated 26 Oct 2026

$8.6Mraised across 6 rounds since 2011, from 6 sources

$350KVenture$325KDebt$1.1MVenture$645KSeries A$950KSeries A$5.3MSeries B

Latest round: Series B, $5.3MAug 2014
Step-upi: 5.5×
Investors: 5

See who backed them

The funding story

Each circle is a round, placed by date and sized by amount. The line above is the running total.

201220132014

$350KVenture$325KDebt$1.1MVenture$645KSeries A$950KSeries A$5.3MSeries B

First round: Venture, $350K
Biggest round: $5.3M
Usual gap between rounds: 8 months

The rounds

Aug 2014
Series B$5.3M2 new2 returning
From a historical funding recordSEC filing: $5.2M sold, first sale Jul 2014
Nov 2013
Series A$950K3 new
Reported by finsmes.comSEC filing: $645K sold, first sale Aug 2013
Aug 2013
Series A$645K
No investor was named in the report.
Reported by sec.govSEC filing: $645K sold, first sale Aug 2013
Sept 2012
Venture$1.1M
No investor was named in the report.
Reported by sec.govSEC filing: $881K sold, first sale Aug 2012
Jan 2012
Debt$325K
No investor was named in the report.
Reported by sec.govSEC filing: $325K sold, first sale Dec 2011
Apr 2011
Venture$350K
No investor was named in the report.
Reported by sec.govSEC filing: $350K sold, first sale Apr 2011

Founders and team

From the SEC filings it signed: 2 on the team.

Christopher HumphresExecutive Officer, Directori
Matthew WiliamsonExecutive Officer, Directori

On the board, as filediAndrew ClelandBrent HillScot Wingo

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.

Venture2011Debt2012Venture2012Series A2013Series A2013Series B2014

IDEA Fund Partners

Triangle Angel Partners

Comcast Ventures

Origin VenturesBruce Boehm

Everyone who backed them

IDEA Fund PartnersVC firm2rounds

Triangle Angel PartnersAngel network2rounds

Comcast VenturesCorporate VC1round

Origin VenturesVC firm1round

Bruce BoehmAngel1round

Missing a round, or an investor who was in one? Tell us.

Also claim to have backed them

This firm lists Windsor Circle 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.