Driven by its vision of the affordable, reliable, net-zero carbon grid of the future, Mainspring is delivering a new category of power generation - the linear generator - that delivers onsite, dispatchable, fuel-flexible power at low cost. Based in Menlo Park, Calif., Mainspring is backed by top-tier venture, strategic, and financial investors.
| Date | Amount | Type | Investors | Valuation |
|---|---|---|---|---|
| 05/04/21 | $95,000,000 | Series D |
40 North Ventures AEP Bill Gates Chevron Technology Ventures Clearsky Devonshire Investors Equinor Energy Ventures KCK Group Princeville Capital | undisclosed |
| 05/24/22 | $150,000,000 | Series E |
Bill Gates Fine Structure Ventures Lightrock  Lineage Ventures Princeville Capital | undisclosed |
