# Cooler Heads funding: rounds and investors > Cooler Heads has raised $14M across 2 rounds since 2025. Investors include Gaingels and Golden Seeds. Every round with its source. Source: https://millionrounds.com/company/cooler-heads (Millionrounds; every figure on the page links to its filing or article) United States · [Series A startup](https://millionrounds.com/companies) # Who invested in *Cooler Heads* 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. Biotech Raised 4 months ago Funding summary Updated 26 Oct 2026 **$14M** raised across 2 rounds since 2025, from 3 sources **$11M** Series A **$3.3M** Series A - **Latest round:** Series A, $3.3M Jul 2026 - **Biggest round:** $11M Series A · Jul 2025 - **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. 2026 **$11M** Series A **$3.3M** Series A - **First round:** Series A, $11M - **Biggest round:** $11M - **Between rounds:** 12 months ## The rounds - **Jul 2026** Series A **$3.3M** *2 returning* [Gaingels](https://millionrounds.com/fund/gaingels) [Golden Seeds](https://millionrounds.com/fund/golden-seeds) Source recorded and 1 other SEC filing: $3.3M sold, first sale Jul 2026 - **Jul 2025** Series A **$11M** *2 new* [Gaingels](https://millionrounds.com/fund/gaingels) [Golden Seeds](https://millionrounds.com/fund/golden-seeds) 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** 2025 **Series A** 2026 [Gaingels](https://millionrounds.com/fund/gaingels) [Golden Seeds](https://millionrounds.com/fund/golden-seeds) ## Everyone who backed them [Gaingels](https://millionrounds.com/fund/gaingels) Private equity **2** rounds [Golden Seeds](https://millionrounds.com/fund/golden-seeds) Angel network **2** rounds Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=cooler-heads). ## Also claim to have backed them These 11 firms list Cooler Heads 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. [New York Angels](https://millionrounds.com/fund/new-york-angels) Angel network Per its own site [Robin Hood Ventures](https://millionrounds.com/fund/robin-hood-ventures) Angel network Per its own site [Mutual Capital Partners](https://millionrounds.com/fund/mutual-capital-partners) VC firm Per its own site [Scientific Health Development](https://millionrounds.com/fund/scientific-health-development) VC firm Per its own site [Crescent Ridge VC](https://millionrounds.com/fund/crescent-ridge-vc) VC firm Per its own site [Ad Astra Ventures](https://millionrounds.com/fund/ad-astra-ventures) Accelerator Per its own site [Bacchus Venture Capital](https://millionrounds.com/fund/bacchus-venture-capital) Micro VC Per its own site [HIP](https://millionrounds.com/fund/hip) VC firm Per its own site [NeoPrima Ventures](https://millionrounds.com/fund/neoprima-ventures) VC firm Per its own site [Particular Ventures](https://millionrounds.com/fund/particular-venture) Angel network Per its own site [Symbiotic Ventures](https://millionrounds.com/fund/symbiotic-ventures) VC firm Per its own site ## Quick answers about Cooler Heads ### Who invested in Cooler Heads? Cooler Heads's investors include Gaingels and Golden Seeds. ### How much has Cooler Heads raised? Cooler Heads has raised $14M across 2 rounds since 2025. ### When did Cooler Heads last raise? Cooler Heads's most recent round was a Series A of $3.3M in Jul 2026. ### What was Cooler Heads's biggest round? Cooler Heads's largest round on record is $11M (Series A), in Jul 2025. ### Who backed Cooler Heads first? Cooler Heads's first round on record, in Jul 2025, was backed by Gaingels and Golden Seeds. ### What stage is Cooler Heads at? Cooler Heads's latest named round is a Series A, in Jul 2026. ### Where is Cooler Heads based? Cooler Heads is based in the United States. ## Companies like Cooler Heads In the same sector, and raised in the last eighteen months. [**Star Therapeutics** $325M · Oct 2026](https://millionrounds.com/company/star-therapeutics)[**Promaxo** $106M · Oct 2026](https://millionrounds.com/company/promaxo)[**Prolific Machines** $105M · Oct 2026](https://millionrounds.com/company/prolific-machines)[**IMIO** $19M · Oct 2026](https://millionrounds.com/company/imio)[**Clinical Ink** $24M · Oct 2026](https://millionrounds.com/company/clinical-ink)[**Rejuvenate Bio** $13M · Oct 2026](https://millionrounds.com/company/rejuvenate-bio) ## 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