Climatetech finance

Nuclear

Holtec bets big on small nuclear reactors in its IPO filing

As it pivots from shutting down nuclear plants to building them, Holtec says small modular reactors can cut costs and speed construction. Now it has to prove it.

By Alexander C. Kaufman . 15 July 2026

A warehouse that says Holtec International — A Holtec International facility in Camden, New Jersey (JHVEPhoto via Getty Images)

Geothermal

Quaise Energy raises $134M to fuel superhot geothermal ambitions

The startup closed the first tranche of Series B funding as it pushes to build a novel geothermal plant in Oregon and advance its rock-melting drilling tech.

By Maria Gallucci . 7 July 2026
Energy efficiency

Norwegian startup raises $6M to fix this sneaky source of energy waste

Eqon makes devices that can “dim” the power consumed by electric heating cables, which factories and cities use — often inefficiently — to keep surfaces warm.

By Maria Gallucci . 24 June 2026
Geothermal

Fervo Energy’s IPO is a milestone for next-gen geothermal

The much-anticipated stock market debut netted $1.9B for Fervo, indicating strong investor interest in the around-the-clock, carbon-free promise of geothermal.

By Dan McCarthy . 13 May 2026
Green steel

US Steel to build $2B lower-carbon iron plant in Arkansas

The new "direct reduced iron" facility at Big River Steel is part of parent company Nippon Steel’s larger $11 billion investment in U.S. operations.

By Maria Gallucci . 30 April 2026
Long-duration energy storage

US battery startup builds factory in China after nixing Kentucky plant

With $300M in new funds, EnerVenue says China is in fact the best spot to scale its NASA-inspired tech — making the firm an outlier as peers grow U.S. manufacturing.

By Julian Spector . 29 April 2026
Climatetech finance

Fervo Energy unveils new power plant details in IPO filing

The next-generation geothermal startup has over 3.6 GW of projects in its pipeline. Fervo is going public as the country clamors for clean, around-the-clock power.

By Dan McCarthy . 20 April 2026
Batteries

Battery recycling still isn’t easy. Just ask Ascend Elements.

The startup’s recent bankruptcy filing speaks to the larger headwinds facing American battery recyclers as automakers scale back EV plans.

By Julian Spector, Kathryn Krawczyk . 17 April 2026
Green steel

Stegra lands funding to complete world’s first major green-steel mill

The company said it secured 1.4 billion euros to rescue its financially troubled steel mill, which will use green hydrogen to make metal in northern Sweden.

By Maria Gallucci . 14 April 2026
Clean industry

Clean cement startup Sublime cuts jobs after Trump pulled funding

Sublime Systems lays off two-thirds of its staff months after pausing work on a planned Massachusetts factory, following the loss of an $87 million federal grant.

By Maria Gallucci . 12 March 2026
Climatetech finance

Span looks to cut smart panel costs with $75M Eaton partnership

The leading U.S. smart-panel startup and the global electrical-equipment giant team up on digital controls for home batteries, EV chargers, and electric appliances.

By Jeff St. John . 9 March 2026