# National Science Foundation's Energy Investments: 52 Startups in Its Portfolio (2026) > The 52 Energy startups National Science Foundation has backed, by stage: $505M raised between them. From the rounds we track; updated nightly. Source: https://millionrounds.com/portfolio-maps/nsf-small-business-innovation-research-small-business-techno-energy-portfolio (Millionrounds; every figure on the page links to its filing or article) ## Stage not reported 45 - [Solid Power](https://millionrounds.com/company/solid-power) - [XL Batteries](https://millionrounds.com/company/xl-batteries) - [Darcy Solutions](https://millionrounds.com/company/darcy-solutions) - [Elementium Materials](https://millionrounds.com/company/elementium-materials) - [Imagen Energy](https://millionrounds.com/company/imagen-energy) - [Tandem PV](https://millionrounds.com/company/tandem-pv) - [Nohms Technologies](https://millionrounds.com/company/nohms-technologies) - [South 8 Technologies](https://millionrounds.com/company/south-8-technologies) - [pH Matter](https://millionrounds.com/company/ph-matter) - [ReJoule](https://millionrounds.com/company/rejoule) - [RePurpose Energy](https://millionrounds.com/company/repurpose-energy) - [Skip Technology](https://millionrounds.com/company/skip-technology) - [Thiozen](https://millionrounds.com/company/thiozen) - [Sironix Renewables](https://millionrounds.com/company/sironix-renewables) - [Marel Power Solutions](https://millionrounds.com/company/marel-power-solutions) - [SkyNano](https://millionrounds.com/company/skynano) - [Arctura](https://millionrounds.com/company/arctura) - [NextGen Battery Technologies](https://millionrounds.com/company/nextgen-battery-technologies) - [Altect](https://millionrounds.com/company/altect) - [COnovate](https://millionrounds.com/company/conovate) - [Valgotech](https://millionrounds.com/company/valgotech) - [Piersica](https://millionrounds.com/company/piersica) - [Tibbar Plasma Technologies](https://millionrounds.com/company/tibbar-plasma-technologies) - [Millimeter Wave Systems](https://millionrounds.com/company/millimeter-wave-systems) +21 more ## Pre-seed and seed 3 - [AirLoom Energy](https://millionrounds.com/company/airloom-energy) - [Carnot Compression](https://millionrounds.com/company/carnot-compression) - [Adnoviv](https://millionrounds.com/company/adnoviv) ## Series A 2 - [Swift Solar](https://millionrounds.com/company/swift-solar) - [Virridy](https://millionrounds.com/company/virridy) ## Series B 2 - [Nth Cycle](https://millionrounds.com/company/nth-cycle) - [Coreshell Technologies](https://millionrounds.com/company/coreshell-technologies) ## Segment by segment ### Stage not reported 45 startups · $274M raised - [**Solid Power**](https://millionrounds.com/company/solid-power) Solid Power is a developer of all-solid-state battery cells that provide enhancements over traditional lithium-ion batteries. United States $130M - [**XL Batteries**](https://millionrounds.com/company/xl-batteries) XL Batteries develops a technology platform to reduce waste formation. United States $21M - [**Darcy Solutions**](https://millionrounds.com/company/darcy-solutions) Darcy Solutions is a renewable energy equipment manufacturer and geothermal technology company founded in 2018. United States $15M - [**Elementium Materials**](https://millionrounds.com/company/elementium-materials) Elementium Materials is a technology company. United States $13M - [**Imagen Energy**](https://millionrounds.com/company/imagen-energy) Imagen Energy offers a compact integrated modular inverter/energy storage system. United States $12M - [**Tandem PV**](https://millionrounds.com/company/tandem-pv) Tandem PV provides a unique opportunity for solar to reach new heights. United States $12M - [**Nohms Technologies**](https://millionrounds.com/company/nohms-technologies) Nohms Technologies specializes in battery solution, providing Lithium Ion Battery and NanoLyte Electrolyte Solutions. United States $11M - [**South 8 Technologies**](https://millionrounds.com/company/south-8-technologies) South 8 sells LiGas®, a liquefied gas electrolyte for Lithium-ion batteries. United States $9.2M ### Pre-seed and seed 3 startups · $8.2M raised - [**AirLoom Energy**](https://millionrounds.com/company/airloom-energy) AirLoom Energy offers wind energy harvesting services. United States $7.5M - [**Carnot Compression**](https://millionrounds.com/company/carnot-compression) Carnot maintains an isothermal compression process that functions as an optimized air and gas compression method. United States $533K - [**Adnoviv**](https://millionrounds.com/company/adnoviv) Adnoviv specializes in the development and commercialization of intelligent sensors and systems for industrial and security applications. United States $175K ### Series A 2 startups · $33M raised - [**Swift Solar**](https://millionrounds.com/company/swift-solar) Swift Solar is a U.S.-based solar technology company founded in 2017, emerging from collaborations with MIT, Stanford University, United States $27M - [**Virridy**](https://millionrounds.com/company/virridy) Virridy is an environmental technology company based in Boulder, Colorado. United States $5.5M ### Series B 2 startups · $191M raised - [**Nth Cycle**](https://millionrounds.com/company/nth-cycle) Nth Cycle is a metal processing technology company working with battery recyclers and miners to recover production-grade critical minerals. United States $137M - [**Coreshell Technologies**](https://millionrounds.com/company/coreshell-technologies) Coreshell Technologies is a nanotechnology company that is a developer of nanolayer coating technology for rechargeable batteries. United States $54M **How this map is made.** Every startup here works in Energy 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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