# Windmill funding: rounds and investors > Windmill has raised $17M across 2 rounds since 2024. Investors include Founder Collective, Correlation Ventures and Primary Venture Partners. Source: https://millionrounds.com/company/windmill (Millionrounds; every figure on the page links to its filing or article) United States · [Venture startup](https://millionrounds.com/companies) # Who invested in *Windmill* 2 rounds we have observed, with the 7 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. Hardware & Electronics Raised 7 months ago Funding summary Updated 26 Oct 2026 **$17M** raised across 2 rounds since 2024, from 2 sources **$5.0M** Series A **$12M** Venture - **Latest round:** Venture, $12M Apr 2026 - **Step-up i:** 2.4× - **Investors:** 7 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 **$5.0M** Series A **$12M** Venture - **First round:** Series A, $5.0M - **Biggest round:** $12M - **Between rounds:** 18 months ## The rounds - **Apr 2026** Venture **$12M** *4 new* [Founder Collective](https://millionrounds.com/fund/founder-collective) [Correlation Ventures](https://millionrounds.com/fund/correlation-ventures) [Primary Venture Partners](https://millionrounds.com/fund/primary-venture-partners) [Oceans](https://millionrounds.com/fund/oceans) Source recorded - **Oct 2024** Series A **$5.0M** *3 new* [Play Ventures](https://millionrounds.com/fund/play-ventures) [Graph Ventures](https://millionrounds.com/fund/graph-ventures) [Superangel](https://millionrounds.com/fund/superangel) 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 A** 2024 **Venture** 2026 [Founder Collective](https://millionrounds.com/fund/founder-collective) [Correlation Ventures](https://millionrounds.com/fund/correlation-ventures) [Primary Venture Partners](https://millionrounds.com/fund/primary-venture-partners) [Play Ventures](https://millionrounds.com/fund/play-ventures) [Graph Ventures](https://millionrounds.com/fund/graph-ventures) [Superangel](https://millionrounds.com/fund/superangel) [Oceans](https://millionrounds.com/fund/oceans) ## Everyone who backed them [Founder Collective](https://millionrounds.com/fund/founder-collective) VC firm **1** round [Correlation Ventures](https://millionrounds.com/fund/correlation-ventures) VC firm **1** round [Primary Venture Partners](https://millionrounds.com/fund/primary-venture-partners) VC firm **1** round [Play Ventures](https://millionrounds.com/fund/play-ventures) VC firm **1** round [Graph Ventures](https://millionrounds.com/fund/graph-ventures) VC firm **1** round [Superangel](https://millionrounds.com/fund/superangel) VC firm **1** round [Oceans](https://millionrounds.com/fund/oceans) VC firm **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=windmill). ## Quick answers about Windmill ### Who invested in Windmill? Windmill's investors include Founder Collective, Correlation Ventures, Primary Venture Partners, Play Ventures and Graph Ventures, and 2 more on record. ### How much has Windmill raised? Windmill has raised $17M across 2 rounds since 2024. ### When did Windmill last raise? Windmill's most recent round was a Venture of $12M in Apr 2026. ### What was Windmill's biggest round? Its most recent round, $12M in Apr 2026, is also its largest on record. ### Who backed Windmill first? Windmill's first round on record, in Oct 2024, was backed by Play Ventures, Graph Ventures and Superangel. ### What stage is Windmill at? Windmill's latest named round is a Venture, in Apr 2026. ### Where is Windmill based? Windmill is based in the United States. ## Companies like Windmill In the same sector, and raised in the last eighteen months. [**Optivolt** $37M · Oct 2026](https://millionrounds.com/company/optivolt)[**Tenstorrent** $3.0B · Oct 2026](https://millionrounds.com/company/tenstorrent)[**Sabi** $50M · Oct 2026](https://millionrounds.com/company/sabi)[**Ringon** $70K · Oct 2026](https://millionrounds.com/company/ringon)[**Relay** $207M · Oct 2026](https://millionrounds.com/company/relay)[**SiMa.ai** $235M · Sept 2026](https://millionrounds.com/company/sima-ai) ## 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