Raised $140M Series B (Feb 2026) led by a16z American Dynamism and Breakthrough Energy Ventures. Founded by ex-Tesla SVP Drew Baglino. Factory targeting 40 GW annual capacity.
Heron Power develops solid-state transformers (SSTs) — a semiconductor-based replacement for the century-old copper-and-iron transformers that form the backbone of the electrical grid. The company raised $140 million in Series B financing in February 2026, led by Andreessen Horowitz's American Dynamism fund and Breakthrough Energy Ventures. Heron was founded by Drew Baglino, former Senior Vice President at Tesla who led Tesla's energy storage products including Megapack, and is targeting a manufacturing facility capable of 40 gigawatts of annual SST production capacity.
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