Who invested in Semprius

18 rounds we have observed, with the 12 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.

Energy

Funding summaryUpdated 26 Oct 2026

$64Mraised across 18 rounds since 2007, from 18 sources

$4.1MSeries A$6.4MSeries B$8.2MGrant$2.7MDebt$20MSeries C$3.0MSeries C$7.5MVenture$2.1MDebt$250KDebt$450KDebt$554KDebt$1.1MDebt$1.3MDebt$1.7MDebt$642KDebt$642KDebt$502KDebt$2.9MGrant

Latest round: Grant, $2.9MAug 2015
Biggest round: $20MSeries C · Jun 2011
Step-upi: 5.8×
Investors: 12

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.

20072009201120132015

$4.1MSeries A$6.4MSeries B$8.2MGrant$2.7MDebt$20MSeries C$2.1MDebt$250KDebt$554KDebt$1.3MDebt$1.7MDebt$502KDebt$2.9MGrant

First round: Series A, $4.1M
Biggest round: $20M
Usual gap between rounds: 4 months

The rounds

Aug 2015
Grant$2.9M1 new
- ARPA-E
From a historical funding recordSEC filing: $502K sold, first sale Jul 2015
Jun 2015
Debt$502K
No investor was named in the report.
From a historical funding recordSEC filing: $502K sold, first sale Jul 2015
May 2015
Debt$642K
No investor was named in the report.
From a historical funding recordSEC filing: $642K sold, first sale May 2015
Mar 2015
Debt$642K
No investor was named in the report.
From a historical funding recordSEC filing: $642K sold, first sale Mar 2015
Jan 2015
Debt$1.7M
No investor was named in the report.
From a historical funding recordSEC filing: $1.7M sold, first sale Dec 2014
Sept 2014
Debt$1.3M
No investor was named in the report.
From a historical funding recordSEC filing: $1.3M sold, first sale Sept 2014
Apr 2014
Debt$1.1M
No investor was named in the report.
From a historical funding recordSEC filing: $1.1M sold, first sale Apr 2014
Feb 2014
Debt$554K
No investor was named in the report.
From a historical funding recordSEC filing: $554K sold, first sale Feb 2014
Dec 2013
Debt$450K
No investor was named in the report.
From a historical funding recordSEC filing: $450K sold, first sale Dec 2013
Sept 2013
Debt$250K
No investor was named in the report.
Reported by sec.govSEC filing: $250K sold, first sale Sept 2013
Apr 2013
Debt$2.1M
No investor was named in the report.
Reported by sec.govSEC filing: $2.1M sold, first sale Mar 2013
Jan 2012
Venture$7.5M3 returning
Reported by greentechmedia.comSEC filing: $31M sold, first sale Jun 2011
Jan 2012
Series C$3.0M2 new1 returning
- Siemens
- Morgan Creek Capital Management
- Illinois Emerging Technologies Fund
Reported by finsmes.comSEC filing: $31M sold, first sale Jun 2011
Jun 2011
Series C$20M1 new5 returning
Reported by finsmes.comSEC filing: $2.7M sold, first sale Aug 2010
Jun 2011
Debt$2.7M
No investor was named in the report.
Reported by sec.govSEC filing: $2.7M sold, first sale Aug 2010
Jan 2010
Grant$8.2M2 new
- NREL Investor Growth Forum
- X-FAB Semiconductor Foundries
Reported by sec.govSEC filing: $8.2M sold, first sale Apr 2009
Jun 2009
Series B$6.4M2 new4 returning
Reported by greentechmedia.comSEC filing: $6.5M sold, first sale Apr 2009
Jul 2007
Series A$4.1M4 new
Reported by semprius.com

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.

Debt2014Debt2014Debt2014Debt2015Debt2015Debt2015Debt2015Grant2015

ARCH Venture Partners

Intersouth PartnersSiemens

Applied Ventures

Illinois Ventures

In-Q-Tel

Morgan Creek Capital Management

ARPA-EGVC Venture FundNREL Investor Growth Forum

Everyone who backed them

ARCH Venture PartnersVC firm4rounds

Intersouth PartnersVC firm4rounds

SiemensCorporate VC3rounds

Applied VenturesCorporate VC3rounds

Illinois VenturesGovernment3rounds

In-Q-TelAccelerator2rounds

Morgan Creek Capital ManagementVC firm1round

ARPA-EGovernment1round

GVC Venture FundVC firm1round

NREL Investor Growth ForumCorporate VC1round

Illinois Emerging Technologies Fundno record of our own yet1round

X-FAB Semiconductor Foundriesno record of our own yet1round

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

Also claim to have backed them

This firm lists Semprius 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.