# Aqua Membranes funding: rounds and investors > Aqua Membranes has raised $11M across 2 rounds since 2024. Investors include Y Combinator and Clean Energy Ventures. Every round with its source. Source: https://millionrounds.com/company/aqua-membranes (Millionrounds; every figure on the page links to its filing or article) United States · [Series B startup](https://millionrounds.com/companies) # Who invested in *Aqua Membranes* 2 rounds we have observed, with the 2 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. Construction Raised 5 months ago Funding summary Updated 26 Oct 2026 **$11M** raised across 2 rounds since 2024, from 2 sources **$4.2M** Series B **$6.5M** Round - **Latest round:** Round, $6.5M Jun 2026 - **Step-up i:** 1.6× - **Investors:** 2 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 **$4.2M** Series B **$6.5M** Round - **First round:** Series B, $4.2M - **Biggest round:** $6.5M - **Between rounds:** 20 months ## The rounds - **Jun 2026** Round **$6.5M** No investor was named in the report. Filed with the SEC (Form D); no report of this raise yet SEC filing: $6.5M sold, first sale Jun 2026 - **Oct 2024** Series B **$4.2M** *2 new* [Y Combinator](https://millionrounds.com/fund/y-combinator) [Clean Energy Ventures](https://millionrounds.com/fund/clean-energy-ventures) Source recorded ## 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 B** 2024 **Round** 2026 [Y Combinator](https://millionrounds.com/fund/y-combinator) [Clean Energy Ventures](https://millionrounds.com/fund/clean-energy-ventures) ## Everyone who backed them [Y Combinator](https://millionrounds.com/fund/y-combinator) Accelerator **1** round [Clean Energy Ventures](https://millionrounds.com/fund/clean-energy-ventures) VC firm **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=aqua-membranes). ## Also claim to have backed them These 4 firms list Aqua Membranes 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. [Clean Energy Venture](https://millionrounds.com/fund/clean-energy-venture-group) Angel network Per its own site [Bidra Innovation Ventures](https://millionrounds.com/fund/bidra-innovation-ventures) VC firm Per its own site [Helios Climate Ventures](https://millionrounds.com/fund/helios-climate-ventures) VC firm Per its own site [NovaCapital](https://millionrounds.com/fund/novacapital) Family office Per its own site ## Quick answers about Aqua Membranes ### Who invested in Aqua Membranes? Aqua Membranes's investors include Y Combinator and Clean Energy Ventures. ### How much has Aqua Membranes raised? Aqua Membranes has raised $11M across 2 rounds since 2024. ### When did Aqua Membranes last raise? Aqua Membranes's most recent round, $6.5M, was in Jun 2026. ### What was Aqua Membranes's biggest round? Its most recent round, $6.5M in Jun 2026, is also its largest on record. ### Who backed Aqua Membranes first? Aqua Membranes's first round on record, in Oct 2024, was backed by Y Combinator and Clean Energy Ventures. ### What stage is Aqua Membranes at? Aqua Membranes's latest named round is a Series B, in Oct 2024. ### Where is Aqua Membranes based? Aqua Membranes is based in the United States. ## Companies like Aqua Membranes In the same sector, and raised in the last eighteen months. [**xPay** $1.5M · Oct 2026](https://millionrounds.com/company/xpay)[**Pennsylvania American Water** $43M · Oct 2026](https://millionrounds.com/company/pennsylvania-american-water)[**Mach9** $46M · Oct 2026](https://millionrounds.com/company/mach9)[**Fireworks AI** $1.7B · Oct 2026](https://millionrounds.com/company/fireworks-ai)[**ASI** $325M · Oct 2026](https://millionrounds.com/company/asi)[**Fragment** $22M · Oct 2026](https://millionrounds.com/company/fragment) ## 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