Form Energy is an American company developing multi-day energy storage for the grid. Its first commercial product is an iron-air battery designed to store electricity for 100 hours at a time. It makes the batteries at Form Factory 1 in Weirton, West Virginia, on the former Weirton Steel site, which employs more than 500 people. The company was founded in 2017, is privately held and is based in Somerville, Massachusetts.
| Field | Value | Source |
|---|---|---|
| Headquarters | Somerville, Massachusetts, USA | PUBLIC SOURCE en.wikipedia.org |
| Founded | 2017 | PUBLIC SOURCE en.wikipedia.org |
| Ownership | Private (Series G $750M financing announced 2026) | COMPANY WEBSITE formenergy.com |
| Employees | 500+ at Form Factory 1 | COMPANY WEBSITE formenergy.com |
| Revenue (published) | No data | NO DATA |
| Operations and regions | United States | COMPANY WEBSITE formenergy.com |
| Customers and markets | Utilities and grid operators | PUBLIC SOURCE en.wikipedia.org |
| Facilities and capacity | Form Factory 1, Weirton, WV (high-volume battery manufacturing) | COMPANY WEBSITE formenergy.com |
| Technologies | Iron-air batteries, 100-hour duration | COMPANY WEBSITE formenergy.com |
| Certifications and standards | No data | NO DATA |
| Partners and named customers | No data | NO DATA |
Accessed Oct 12, 2026.
