United States · Series D startup
4 rounds we have observed, with the 6 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
$38Mraised across 4 rounds since 2006, from 4 sources
Each circle is a round, placed by date and sized by amount. The line above is the running total.
Kleiner Perkins Caufield & Byers
Norwest Venture Partners
Icon Ventures
Georgian
Vilicus VenturesReported by techcrunch.comSEC filing: $13M sold, first sale Mar 2012
No investor was named in the report.
Reported by sec.govSEC filing: $3.8M sold, first sale Dec 2009
Reported by deals.venturebeat.com
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
Kleiner Perkins Caufield & ByersNorwest Venture PartnersIcon VenturesJafco VenturesGeorgianVilicus VenturesFrom historical deal records. Wrong? Tell us.
Missing a round, or an investor who was in one? Tell us.
41st Parameter's investors include Kleiner Perkins Caufield & Byers, Norwest Venture Partners, Icon Ventures, Jafco Ventures and Georgian, and 1 more on record.
41st Parameter has raised $38M across 4 rounds since 2006.
41st Parameter's most recent round was a Series D of $13M in Apr 2012.
Its most recent round, $13M in Apr 2012, is also its largest on record.
41st Parameter's first round on record, in May 2006, was backed by Kleiner Perkins Caufield & Byers and Norwest Venture Partners.
41st Parameter's latest named round is a Series D, in Apr 2012.
41st Parameter is based in the United States.
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United States ·