NRG-004 Energy & Climate · Private
Form Energy
Iron-air batteries that store power for 100 hours.
- Founded
- 2017
- 9 years ago
- Total raised
- $1.6B
- Disclosed equity, Sep 2026
- Team
- 883
- Headcount, Sep 2026
- Latest round
- Series G
1 General description
Builds grid batteries that store energy by reversibly rusting iron, aiming for multi-day discharge at far lower cost than lithium-ion. It manufactures them on the former Weirton Steel site in West Virginia.
2 Features
3 Specifications
| Parameter | Value | Notes |
|---|---|---|
| Category | Energy & Climate | Pin 05, yellow band |
| Flagship product | — | No single flagship |
| Headquarters | Somerville, United States | Boston hub |
| Status | Private | |
| Business model | B2B | Sells to businesses |
| Backers | T. Rowe Price, Sequoia Capital, Breakthrough Energy Ventures, Eni Next | Through Series G |
| Website | formenergy.com ↗ | |
| Profiles | LinkedIn ↗ |
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