Top 100 Climate Tech Companies 2026

Climate tech, clean tech, and clean energy companies tackling climate change, ranked by total funding raised.

Known total funding for 100 of 100 ranked companies: $115.3B.

Showing top 100 matching companies · Ranked by total funding raised · Latest company record update Oct 8, 2026

Methodology: up to 100 active companies matching this list's filters are ordered by disclosed total funding in USD. Companies whose latest round is one of: Grant are excluded. Totals include recorded grants and other qualifying funding, not just equity. Open a company profile for its funding summary and available detail. How this data is built.

Sempra Infrastructure Partners

Sempra Infrastructure develops, builds, operates, and invests in infrastructure serving customers...

San Diego, United States1001–5000Climate Tech

Corporate RoundTotal funding$12.1BSep 2025

Crusoe

AI infrastructure company building renewable-powered data centers and cloud compute optimized for...

Denver, United States201–500Artificial Intelligence, Clean Energy

Series FTotal funding$9.4BSep 2026

Stegra

Green steel company using hydrogen and renewable electricity to decarbonize steel production. For...

Stockholm, Sweden201–500Clean Tech, Climate Tech

Venture RoundTotal funding$4.6BJun 2026

Generate Capital

Generate is a North American energy platform delivering reliable, affordable, lower-carbon power ...

San Francisco, United States201–500Climate Tech

Growth EquityTotal funding$4.5BJan 2024

Commonwealth Fusion Systems

MIT spinout developing compact fusion energy plants using high-temperature superconducting magnet...

Devens, United States501–1000Climate Tech, Energy

Venture RoundTotal funding$3.9BJul 2026

The Boring Company

The Boring Company designs and constructs underground tunnels and all-electric Loop systems to en...

Pflugerville, United States201–500Climate Tech, Cloud

Series DTotal funding$3.2BSep 2026

Form Energy

Form Energy develops low-cost iron-air batteries that store electricity for 100 hours, helping ut...

Somerville, United States501–1000Climate Tech

Series G+Total funding$2.6BAug 2026

Coastal Virginia Offshore Wind

Dominion Energy is constructing the 2.6-gigawatt Coastal Virginia Offshore Wind project to provid...

Virginia Beach, United StatesClimate Tech

Corporate RoundTotal funding$2.6BOct 2024

Electrify America

Operator of the largest open DC fast-charging network for electric vehicles in the United States,...

Reston, United States51–200Climate Tech

Corporate RoundTotal funding$2.5BJun 2022

Base Power

Home battery and energy company that provides distributed power storage to reinforce the electric...

Austin, United States51–200Clean Energy, Clean Tech

Series DTotal funding$2.3BAug 2026

Zipline

Zipline operates an autonomous delivery service that transports medical supplies, food, and retai...

South San Francisco, United States501–1000Climate Tech, Defense Tech

Series G+Total funding$2.0BMar 2026

Valar Atomics

Nuclear energy startup building hundreds of reactors at one Gigasite for heavy industrial power a...

El Segundo, United States11–50Climate Tech, Defense Tech

Series BTotal funding$1.7BAug 2026

Vioneo

Scale-up established in 2024

Antwerp, Belgium11–50Chemicals, Clean Tech

Corporate RoundTotal funding$1.7BSep 2024

SVOLT

SVOLT Energy Technology is a global manufacturer of battery cells, modules, and energy storage sy...

Changzhou, China10001+Climate Tech, Automotive

Series BTotal funding$1.6BFeb 2021

Octopus Energy Group

Global green energy and technology company using data and software to deliver affordable clean en...

London, United Kingdom1001–5000Clean Energy

Growth EquityTotal funding$1.6BDec 2025

TerraPower

TerraPower develops carbon-free energy technologies and extracts radioisotopes for lifesaving can...

Bellevue, United States501–1000Climate Tech

Venture RoundTotal funding$1.5BJun 2025

TAE Technologies

TAE Technologies is a fusion power company developing the most sustainable and economically compe...

Foothill Ranch, United States201–500Energy, Deep Tech

Corporate RoundTotal funding$1.5BDec 2025

Indigo

Indigo Ag uses science and technology to help farmers and agribusinesses improve agricultural sus...

Boston, United States501–1000Climate Tech

Series G+Total funding$1.5BSep 2023

Helion

Nuclear fusion energy company building the world's first commercial fusion power plant; has a 50 ...

Everett, United States201–500Clean Energy, Climate Tech

Series G+Total funding$1.5BJun 2026

Redwood Materials

Redwood Materials recycles lithium-ion batteries and produces critical materials for energy stora...

Carson City, United States1001–5000Clean Energy, Manufacturing

Series ETotal funding$1.4BOct 2025

Evolve Transition Infrastructure

Evolve Transition Infrastructure was a public partnership focused on acquiring, developing, and o...

Houston, United States11–50Climate Tech

Venture RoundTotal funding$1.4BNov 2021

Avaada

Clean Energy, Energy

Growth EquityTotal funding$1.3BJun 2023

Verkor

Verkor is a French battery manufacturer accelerating low-carbon battery production for the Europe...

Grenoble, France501–1000Climate Tech

Series CTotal funding$1.3BSep 2023

Sunwoda EVB

Sunwoda EVB researches, develops, produces, and sells power lithium battery cells, modules, batte...

Shenzhen, China10001+Climate Tech

Series CTotal funding$1.2BJan 2024

CuspAI

CuspAI is a frontier AI company pioneering the discovery of breakthrough materials to power human...

Cambridge, United Kingdom11–50Artificial Intelligence, Climate Tech

Series BTotal funding$1.2BJul 2026

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