United States · Who invested in Marinus Pharmaceuticals?
Marinus Pharmaceuticals's investors include Canaan, Domain Associates, Sofinnova Investments and Foundation Medical Partners.
2010201120122013
$20MSeries B$11MVenture$21MSeries CUnited States · Series C startup
Who invested in Marinus Pharmaceuticals
3 rounds we have observed, with the 4 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
$52Mraised across 3 rounds since 2009, from 3 sources
$20MSeries B$11MVenture$21MSeries C
- Latest round
- Series C, $21MJan 2013
- Step-upi
- 1.8×
- 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 B, $20M May 2009
- Biggest round
- $21M Series C · Jan 2013
- Between rounds
- 3.7 years from the last two
The rounds
- Jan 2013Series C$21M4 returning
Reported by finsmes.comSEC filing: $11M sold, first sale Dec 2012
- Dec 2012Venture$11M
No investor was named in the report.
Reported by sec.govSEC filing: $11M sold, first sale Dec 2012
- May 2009Series B$20M4 new
Reported by onbiovc.comSEC filing: $20M sold, first sale Apr 2009
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.
Series B2009Venture2012Series C2013
Canaan
Domain Associates
Sofinnova InvestmentsFoundation Medical Partners
CanaanDomain AssociatesSofinnova InvestmentsFoundation Medical PartnersEveryone who backed them
Foundation Medical PartnersPrivate equity2rounds
Missing a round, or an investor who was in one? Tell us.
Quick answers about Marinus Pharmaceuticals
How much has Marinus Pharmaceuticals raised?
Marinus Pharmaceuticals has raised $52M across 3 rounds since 2009.
When did Marinus Pharmaceuticals last raise?
Marinus Pharmaceuticals's most recent round was a Series C of $21M in Jan 2013.
What was Marinus Pharmaceuticals's biggest round?
Its most recent round, $21M in Jan 2013, is also its largest on record.
Who backed Marinus Pharmaceuticals first?
Marinus Pharmaceuticals's first round on record, in May 2009, was backed by Canaan, Domain Associates and Sofinnova Investments and 1 others.
What stage is Marinus Pharmaceuticals at?
Marinus Pharmaceuticals's latest named round is a Series C, in Jan 2013.
Where is Marinus Pharmaceuticals based?
Marinus Pharmaceuticals is based in the United States.
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