# RenewCO2 funding: rounds and investors > RenewCO2 has raised $15M across 3 rounds since 2025. Investors include National Science Foundation, MassChallenge and US Department of Energy. Source: https://millionrounds.com/company/renewco2 (Millionrounds; every figure on the page links to its filing or article) United States · [Seed startup](https://millionrounds.com/companies) # Who invested in *RenewCO2* 3 rounds we have observed, with the 4 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. Chemicals & Materials Raised 1 month ago Funding summary Updated 26 Oct 2026 **$15M** raised across 3 rounds since 2025, from 3 sources **$2.0M** Seed **$4.2M** Seed **$9.3M** Round - **Latest round:** Round, $9.3M Sept 2026 - **Step-up i:** 2.2× - **Investors:** 4 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 **$2.0M** Seed **$4.2M** Seed **$9.3M** Round - **First round:** Seed, $2.0M - **Biggest round:** $9.3M - **Between rounds:** 14 months ## The rounds - **Sept 2026** Round **$9.3M** No investor was named in the report. Filed with the SEC (Form D); no report of this raise yet SEC filing: $9.3M sold, first sale Sept 2026 - **Aug 2025** Seed **$2.0M** *4 new* [National Science Foundation](https://millionrounds.com/fund/nsf-small-business-innovation-research-small-business-techno) [MassChallenge](https://millionrounds.com/fund/masschallenge) [US Department of Energy](https://millionrounds.com/fund/u-s-department-of-energy) [Cleantech Open](https://millionrounds.com/fund/cleantech-open) Source recorded SEC filing: $4.2M sold, first sale Aug 2025 - **Aug 2025** Seed **$4.2M** *4 returning* [National Science Foundation](https://millionrounds.com/fund/nsf-small-business-innovation-research-small-business-techno) [MassChallenge](https://millionrounds.com/fund/masschallenge) [US Department of Energy](https://millionrounds.com/fund/u-s-department-of-energy) [Cleantech Open](https://millionrounds.com/fund/cleantech-open) Source recorded SEC filing: $4.2M sold, first sale Aug 2025 ## 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. **Seed** 2025 **Seed** 2025 **Round** 2026 [National Science Foundation](https://millionrounds.com/fund/nsf-small-business-innovation-research-small-business-techno) [MassChallenge](https://millionrounds.com/fund/masschallenge) [US Department of Energy](https://millionrounds.com/fund/u-s-department-of-energy) [Cleantech Open](https://millionrounds.com/fund/cleantech-open) ## Everyone who backed them [National Science Foundation](https://millionrounds.com/fund/nsf-small-business-innovation-research-small-business-techno) Government **2** rounds [MassChallenge](https://millionrounds.com/fund/masschallenge) Accelerator **2** rounds [US Department of Energy](https://millionrounds.com/fund/u-s-department-of-energy) Government **2** rounds [Cleantech Open](https://millionrounds.com/fund/cleantech-open) Accelerator **2** rounds Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=renewco2). ## Also claim to have backed them This firm lists RenewCO2 as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above. [Energy Transition Ventures](https://millionrounds.com/fund/energy-transition-ventures) VC firm Per its own site ## Quick answers about RenewCO2 ### Who invested in RenewCO2? RenewCO2's investors include National Science Foundation, MassChallenge, US Department of Energy and Cleantech Open. ### How much has RenewCO2 raised? RenewCO2 has raised $15M across 3 rounds since 2025. ### When did RenewCO2 last raise? RenewCO2's most recent round, $9.3M, was in Sept 2026. ### What was RenewCO2's biggest round? Its most recent round, $9.3M in Sept 2026, is also its largest on record. ### Who backed RenewCO2 first? RenewCO2's first round on record, in Aug 2025, was backed by National Science Foundation, MassChallenge and US Department of Energy and 1 others. ### What stage is RenewCO2 at? RenewCO2's latest named round is a Seed, in Aug 2025. ### Where is RenewCO2 based? RenewCO2 is based in the United States. ## Companies like RenewCO2 In the same sector, and raised in the last eighteen months. [**Albert Invent** $20M · Oct 2026](https://millionrounds.com/company/albert-invent)[**Albert** $57M · Oct 2026](https://millionrounds.com/company/albert)[**Azulene Labs** $3.4M · Sept 2026](https://millionrounds.com/company/azulene-labs)[**Critical Materials Group** $10M · Sept 2026](https://millionrounds.com/company/critical-materials-group)[**Rise Reforming** $500K · Sept 2026](https://millionrounds.com/company/rise-reforming)[**Fluxnium** $7.0M · Sept 2026](https://millionrounds.com/company/fluxnium) ## 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