# National Science Foundation's Cleantech Investments: 46 Startups in Its Portfolio (2026) > The 46 Cleantech startups National Science Foundation has backed, by stage: $1.1B raised between them. From the rounds we track; updated nightly. Source: https://millionrounds.com/portfolio-maps/nsf-small-business-innovation-research-small-business-techno-cleantech-portfolio (Millionrounds; every figure on the page links to its filing or article) ## Stage not reported 34 - [*H* Heirloom](https://millionrounds.com/company/heirloom) - [Great Lakes ReNEW](https://millionrounds.com/company/great-lakes-renew) - [Skyven Technologies](https://millionrounds.com/company/skyven-technologies) - [Twelve](https://millionrounds.com/company/twelve) - [Turntide Technologies](https://millionrounds.com/company/turntide-technologies) - [Altaeros Energies](https://millionrounds.com/company/altaeros-energies) - [Colorado-Wyoming Climate Resilience Engine](https://millionrounds.com/company/colorado-wyoming-climate-resilience-engine) - [Event Horizon Telescope](https://millionrounds.com/company/event-horizon-telescope) - [TeraPore Technologies](https://millionrounds.com/company/terapore-technologies) - [Solvus Global](https://millionrounds.com/company/solvus-global) - [WaveArray](https://millionrounds.com/company/wavearray) - [Smart Material Solutions](https://millionrounds.com/company/smart-material-solutions) - [Norwich Technologies](https://millionrounds.com/company/norwich-technologies) - [Katz Water Technologies](https://millionrounds.com/company/katz-water-technologies) - [NanoSepex](https://millionrounds.com/company/nanosepex) - [Aquagga, Inc.](https://millionrounds.com/company/aquagga-inc) - [LeapFrog Design](https://millionrounds.com/company/leapfrog-design) - [Nativus](https://millionrounds.com/company/nativus) - [*A* Arbsource](https://millionrounds.com/company/arbsource) - [SuperClean Glass](https://millionrounds.com/company/superclean-glass) - [*A* AdvanceH20](https://millionrounds.com/company/advanceh20) - [Godwit Key Company](https://millionrounds.com/company/godwit-key-company) - [Wildlife Protection Management](https://millionrounds.com/company/wildlife-protection-management) - [T-Omega Wind](https://millionrounds.com/company/t-omega-wind) +10 more ## Pre-seed and seed 4 - [Transaera](https://millionrounds.com/company/transaera) - [Singularity Energy](https://millionrounds.com/company/singularity-energy) - [EELI Technology](https://millionrounds.com/company/eeli-technology) - [Phoenix Waste Solutions](https://millionrounds.com/company/phoenix-waste-solutions) ## Series A 4 - [Emvolon](https://millionrounds.com/company/emvolon) - [Princeton Critical Minerals](https://millionrounds.com/company/princeton-critical-minerals) - [Aclarity](https://millionrounds.com/company/aclarity) - [LC Drives](https://millionrounds.com/company/lc-drives) ## Growth 2 - [Amber](https://millionrounds.com/company/amber) - [SkySpecs](https://millionrounds.com/company/skyspecs) ## Series B 2 - [ZwitterCo](https://millionrounds.com/company/zwitterco) - [Noble Gas Systems](https://millionrounds.com/company/noble-gas-systems) ## Segment by segment ### Stage not reported 34 startups · $795M raised - [*H* **Heirloom**](https://millionrounds.com/company/heirloom) United States $203M - [**Great Lakes ReNEW**](https://millionrounds.com/company/great-lakes-renew) Great Lakes ReNEW is a partnership of more than 50 institutions, including universities, technology firms, and government. United States $160M - [**Skyven Technologies**](https://millionrounds.com/company/skyven-technologies) Skyven Technologies is an energy-as-a-service company with a mission to decarbonize industrial process heat. United States $145M - [**Twelve**](https://millionrounds.com/company/twelve) Twelve offers smart payment solutions such as software modules, links, ordering solutions, internet solutions, communication & sponsorship. United States $117M - [**Turntide Technologies**](https://millionrounds.com/company/turntide-technologies) Turntide Technologies develops an electric motor system designed to drive down energy consumption. United States $80M - [**Altaeros Energies**](https://millionrounds.com/company/altaeros-energies) Altaeros Energies develops airborne wind turbine to produce abundant, low cost, renewable energy. United States $42M - [**Colorado-Wyoming Climate Resilience Engine**](https://millionrounds.com/company/colorado-wyoming-climate-resilience-engine) Colorado-Wyoming Climate Resilience Engine mission is to bridge the skills gap in the climate technology sector. United States $15M - [**Event Horizon Telescope**](https://millionrounds.com/company/event-horizon-telescope) Event Horizon Telescope is a planet-scale array of eight ground-based radio telescopes forged through international collaboration - $13M ### Pre-seed and seed 4 startups · $15M raised - [**Transaera**](https://millionrounds.com/company/transaera) Transaera is bringing comfort to billions of people while reducing the impact on climate and grid infrastructure. United States $8.2M - [**Singularity Energy**](https://millionrounds.com/company/singularity-energy) Singularity Energy is a Boston-area technology company focused on data and software solutions for grid decarbonization in the energy sector. United States $4.5M - [**EELI Technology**](https://millionrounds.com/company/eeli-technology) EELI Technology, a Silicon Valley-based mining technology company, develops Advanced Lithium Recovery solutions, making lithium pr United States $2.0M - [**Phoenix Waste Solutions**](https://millionrounds.com/company/phoenix-waste-solutions) Phoenix Waste Solutions is an environmental services company based in Chauvin, Louisiana, founded in 2019. United States $100K ### Series A 4 startups · $75M raised - [**Emvolon**](https://millionrounds.com/company/emvolon) Emvolon is a technology company that converts wasted resources into low-cost green fuels United States $22M - [**Princeton Critical Minerals**](https://millionrounds.com/company/princeton-critical-minerals) Princeton Critical Minerals is a cleantech company that boosts lithium extraction and production from brine sources. United States $21M - [**Aclarity**](https://millionrounds.com/company/aclarity) Aclarity, Inc. United States $17M - [**LC Drives**](https://millionrounds.com/company/lc-drives) LC Drives a unique group of people who have developed both transformative and disruptive technologies for electrical rotating machines. - $15M ### Growth 2 startups · $180M raised - [**Amber**](https://millionrounds.com/company/amber) Built by a collective of artisans, Amber functions as an integrated hub with multidisciplinary global locations. Australia $148M - [**SkySpecs**](https://millionrounds.com/company/skyspecs) SkySpecs is a leader in renewable energy asset management, focusing on the wind energy sector. United States $32M ### Series B 2 startups · $64M raised - [**ZwitterCo**](https://millionrounds.com/company/zwitterco) ZwitterCo is a leader in advanced membrane solutions for industrial and agricultural water treatment, founded in 2018 as a spinout United States $58M - [**Noble Gas Systems**](https://millionrounds.com/company/noble-gas-systems) Noble Gas Systems develops gas storage and delivery systems with conformable tank technology. United States $5.7M **How this map is made.** Every startup here works in Cleantech and has raised money in a round we track that names National Science Foundation as an investor. Each sits under the stage of its latest round. Rebuilt nightly; updated 15 November 2026. ## More portfolio maps [All portfolios](https://millionrounds.com/portfolio-maps) [Sector portfolio **National Science Foundation's Biotech portfolio** 250 startups · $2.0B](https://millionrounds.com/portfolio-maps/nsf-small-business-innovation-research-small-business-techno-biotech-portfolio)[Sector portfolio **National Science Foundation's Healthtech portfolio** 149 startups · $516M](https://millionrounds.com/portfolio-maps/nsf-small-business-innovation-research-small-business-techno-healthtech-portfolio)[Sector portfolio **National Science Foundation's AI portfolio** 118 startups · $1.9B](https://millionrounds.com/portfolio-maps/nsf-small-business-innovation-research-small-business-techno-ai-portfolio)[Sector portfolio **National Science Foundation's Chemicals & Materials portfolio** 75 startups · $797M](https://millionrounds.com/portfolio-maps/nsf-small-business-innovation-research-small-business-techno-chemicals-materials-portfolio)[Sector portfolio **National Science Foundation's Agtech portfolio** 57 startups · $636M](https://millionrounds.com/portfolio-maps/nsf-small-business-innovation-research-small-business-techno-agtech-portfolio)[Sector portfolio **National Science Foundation's Big Data & Analytics portfolio** 56 startups · $534M](https://millionrounds.com/portfolio-maps/nsf-small-business-innovation-research-small-business-techno-big-data-analytics-portfolio) ## Raising from investors like National Science Foundation? 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