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Form Energy
L0 · Energy & Power
storage/batteriesstartupprivateseries C+
Form Energy develops and commercializes long-duration iron-air energy storage systems designed to balance the electrical grid. The company's technology relies on an iron-oxygen rust reaction to store electricity for multiple days at a fraction of the cost of standard lithium-ion batteries. This multi-day capacity enables direct corporate offtakers like Google to secure highly stable clean energy for critical compute infrastructure.
Ecosystem functionDominates the multi-day grid-scale energy storage sector, using extremely cheap iron-air rust chemistry to offer 100-hour clean power buffers for AI data centers.
Business modelMulti-day iron-air energy storage manufacturing
Revenue—
Valuation$2.20Breported
Last round$495.33M2026
Sources · 3 ↓
Suggest an editLast verified 2026-07-22