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Illustration for: Antora Energy Closes $550M for Thermal Batteries
Value Add VC/Pulse/FUNDING$550M Series C

Antora Energy Closes $550M for Thermal Batteries

Antora Energy closed a $550 million Series C at a roughly $2.47 billion valuation to scale production of its thermal batteries, which help data centers and heavy industry run on renewable power as AI-driven electricity demand surges.

TC
Trace Cohen
Early-stage VC & angel · Founder, New York Venture Partners
July 30, 2026
1 min read
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THE RUNDOWN

1

The $550 million Series C was co-led by G2 Venture Partners and Eclipse, with new investors including Ribbit Capital, Salesforce Ventures, Activate Capital, John Doerr, Westly Group, StepStone Group, and Liberty Mutual Strategic Ventures joining existing backers Breakthrough Energy Ventures and Lowercarbon Capital

2

The round values Antora at roughly $2.47 billion and will fund a second US manufacturing hub plus a stronger domestic supply chain for its thermal-battery technology

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The raise comes directly on the heels of Antora deploying one of the largest battery storage projects in the world, a 5 gigawatt-hour system in South Dakota that went from initial construction to delivering power in under 12 months

4

It's one of the largest cleantech venture rounds of the year, arriving as AI data centers' electricity demand is reshaping venture interest in industrial energy storage well beyond traditional lithium-ion batteries

TC

The VC Read · Trace's Take

Trace Cohen

A $550M round for batteries that store heat, not electrons, is the clearest sign yet that AI's power problem has become its own investable category, separate from chips and data centers themselves. John Doerr and Salesforce Ventures showing up on a climate-tech cap table isn't ESG box-checking anymore -- it's a direct bet that data center power constraints are as real a bottleneck as GPU supply. Watch whether Antora's 12-month deployment speed in South Dakota becomes replicable, because that's the number that actually determines if this category scales fast enough to matter.

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Analysis

Antora Energy closed a $550 million Series C round co-led by G2 Venture Partners and Eclipse, valuing the thermal-battery maker at roughly $2.47 billion. New investors including Ribbit Capital, Salesforce Ventures, Activate Capital, John Doerr, Westly Group, StepStone Group, and Liberty Mutual Strategic Ventures joined the round alongside existing backers Breakthrough Energy Ventures, Lowercarbon Capital, Decarbonization Partners, Impact Science Ventures, and Trust Ventures.

Antora's thermal batteries store energy as heat rather than in conventional lithium-ion chemistry, letting heavy industry and data centers draw power from renewable sources even when the sun isn't shining or the wind isn't blowing. The round follows directly on the heels of Antora deploying one of the largest battery storage systems in the world -- a 5 gigawatt-hour installation in South Dakota that went from initial construction to delivering power in under 12 months, an unusually fast timeline for utility-scale energy infrastructure.

The capital will fund a second US manufacturing hub and a more domestic supply chain, positioning Antora to scale production as AI data centers' electricity demand becomes one of the most consequential drivers of new venture interest in industrial energy storage. For climate-tech investors, a $550 million round this size, with a bench of investors spanning traditional VC, strategic corporates, and public-market-adjacent funds like StepStone, signals that energy storage for AI infrastructure has become one of 2026's most credible non-AI-native venture categories. What to watch: whether the second manufacturing hub comes online on schedule, and whether Antora's South Dakota deployment timeline becomes the industry benchmark other thermal-storage players get measured against.

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@Trace_Cohen·t@nyvp.com