# Siren funding: rounds and investors > Siren has raised $9.5M across 2 rounds since 2025. Investors include Molnlycke Health Care, 500 Global and Plug and Play. Every round with its source. Source: https://millionrounds.com/company/siren (Millionrounds; every figure on the page links to its filing or article) Ireland · [Venture startup](https://millionrounds.com/companies) # 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. AI Big Data & Analytics Healthcare Healthtech Raised 11 months ago Follow Siren and see its new rounds in your feed. [Start following](https://millionrounds.com/login?join=1&why=follow&next=%2Fcompany%2Fsiren) Funding summary Updated 5 Nov 2026 **$9.5M** raised across 2 rounds since 2025, from 3 sources - **Latest round:** Venture Dec 2025 - **Biggest round:** $9.5M Round · Jan 2025 - **Investors:** 11 (1 led) 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. 2025 2026 **$9.5M** Round **?** Venture - **First round:** Round, $9.5M - **Biggest round:** $9.5M - **Between rounds:** 11 months ## The rounds - **Dec 2025** Venture **Amount undisclosed** *4 new* [Enterprise Ireland](https://millionrounds.com/fund/enterprise-ireland) [European Investment Bank](https://millionrounds.com/fund/european-investment-bank) [Atlantic Bridge](https://millionrounds.com/fund/atlantic-bridge) [Frontline Ventures](https://millionrounds.com/fund/frontline-ventures) Source recorded - **Jan 2025** Round **$9.5M** *7 new* [Molnlycke Health Care](https://millionrounds.com/fund/molnlycke-health-care) Lead [500 Global](https://millionrounds.com/fund/500-startups) [Plug and Play](https://millionrounds.com/fund/plug-and-play) [Khosla Ventures](https://millionrounds.com/fund/khosla-ventures) [Founders Fund](https://millionrounds.com/fund/founders-fund) [Liquid 2 Ventures](https://millionrounds.com/fund/liquid-2-ventures) [Quiet Capital](https://millionrounds.com/fund/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. **Round** 2025 **Venture** 2025 [Molnlycke Health Care](https://millionrounds.com/fund/molnlycke-health-care) L [500 Global](https://millionrounds.com/fund/500-startups) [Plug and Play](https://millionrounds.com/fund/plug-and-play) [Khosla Ventures](https://millionrounds.com/fund/khosla-ventures) [Founders Fund](https://millionrounds.com/fund/founders-fund) [Liquid 2 Ventures](https://millionrounds.com/fund/liquid-2-ventures) [Enterprise Ireland](https://millionrounds.com/fund/enterprise-ireland) [Quiet Capital](https://millionrounds.com/fund/quiet-capital) [European Investment Bank](https://millionrounds.com/fund/european-investment-bank) [Atlantic Bridge](https://millionrounds.com/fund/atlantic-bridge) ## Everyone who backed them [Molnlycke Health Care](https://millionrounds.com/fund/molnlycke-health-care) Corporate VC **1** round, led 1 [500 Global](https://millionrounds.com/fund/500-startups) Angel **1** round [Plug and Play](https://millionrounds.com/fund/plug-and-play) Accelerator **1** round [Khosla Ventures](https://millionrounds.com/fund/khosla-ventures) VC firm **1** round [Founders Fund](https://millionrounds.com/fund/founders-fund) VC firm **1** round [Liquid 2 Ventures](https://millionrounds.com/fund/liquid-2-ventures) VC firm **1** round [Enterprise Ireland](https://millionrounds.com/fund/enterprise-ireland) Government **1** round [Quiet Capital](https://millionrounds.com/fund/quiet-capital) VC firm **1** round [European Investment Bank](https://millionrounds.com/fund/european-investment-bank) Government **1** round [Atlantic Bridge](https://millionrounds.com/fund/atlantic-bridge) VC firm **1** round [Frontline Ventures](https://millionrounds.com/fund/frontline-ventures) VC firm **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=siren). ## 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. [Portfolia](https://millionrounds.com/fund/portfolia) VC firm Per its own site [Manta Ray Ventures](https://millionrounds.com/fund/manta-ray-ventures) VC firm Per its own site [Beni VC](https://millionrounds.com/fund/beni-venture-capital) VC firm Per its own site [Flucas Ventures](https://millionrounds.com/fund/flucas-ventures) Angel network Per its own site [Microtech Ventures](https://millionrounds.com/fund/microtech-ventures) Advisor Per its own site ## Quick answers about Siren ### 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. ### 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. ## Companies like Siren In the same sector, and raised in the last eighteen months. [**LearnUpon** $51M · Oct 2026](https://millionrounds.com/company/learnupon)[**Neurent Medical** $29M · Sept 2026](https://millionrounds.com/company/neurent-medical)[**Wayflyer** $50M · Sept 2026](https://millionrounds.com/company/wayflyer)[**Grass** $20M · Sept 2026](https://millionrounds.com/company/grass)[**Everhaze** $514K · Jul 2026](https://millionrounds.com/company/everhaze)[**Payemoji** Jul 2026](https://millionrounds.com/company/payemoji) ## Find investors like these Search every investor by what they have actually funded, then narrow to your stage and market. Free. Open the investor searchOr these rounds in the app