Ireland · 
Who invested in Siren?
Siren's investors include Molnlycke Health Care, 500 Global, Plug and Play, Khosla Ventures and Founders Fund, and 6 more on record.
20252026
$9.5MRound?VentureIreland · Venture startup
Who invested in Siren
2 rounds we have observed, with the 11 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.
Raised 11 months ago
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Funding summaryUpdated 5 Nov 2026
$9.5Mraised across 2 rounds since 2025, from 3 sources
- Latest round
- VentureDec 2025
- Biggest round
- $9.5MRound · Jan 2025
- Investors
- 11 (1 led)
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Round, $9.5M Jan 2025
- Biggest round
- $9.5M Round · Jan 2025
- Between rounds
- 11 months from the last two
The rounds
- Dec 2025VentureAmount undisclosed4 new
Source recorded
- Jan 2025Round$9.5M7 new
Molnlycke Health CareLead
500 Global
Plug and Play
Khosla Ventures
Founders Fund
Liquid 2 Ventures
Quiet Capital
Reported by TechCrunch and 1 other
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.
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Also claim to have backed them
These 5 firms list Siren as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.
Quick answers about Siren
How much has Siren raised?
Siren has raised $9.5M across 2 rounds since 2025. One round did not disclose an amount, so the total is a floor.
When did Siren last raise?
Siren's most recent round was a Venture in Dec 2025.
What was Siren's biggest round?
Siren's largest round on record is $9.5M (Undisclosed round), in Jan 2025, led by Molnlycke Health Care.
Who backed Siren first?
Siren's first round on record, in Jan 2025, was backed by Molnlycke Health Care, 500 Global and Plug and Play and 4 others.
What stage is Siren at?
Siren's latest named round is a Venture, in Dec 2025.
Where is Siren based?
Siren is based in Ireland.
Who led Siren's rounds?
Molnlycke Health Care led the Undisclosed round in 2025.
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