# Mainspring raises over $150 million in Series E funding

Mainspring Energy closed more than $150 million in the first stage of its Series E funding, led by Lightrock and joined by Khosla Ventures, Bill Gates, and others, to develop new linear generator models and accelerate adoption.

- Type: Investment
- Announced: 2022-05-24
- Where: United States
- Value: $150.0M
- Status: announced
- Products: linear generators
- Sectors: [Power Generation Equipment](https://endata.com/sectors/power-generation-equipment.md)

## Companies

- [Mainspring Energy](https://endata.com/companies/54899.md)
- [Khosla Ventures](https://endata.com/companies/15123.md) (investor)
- [Lightrock](https://endata.com/companies/63044.md) (investor)

## Sources

- [prnewswire.com](https://www.prnewswire.com/news-releases/mainspring-announces-deal-with-lineage-logistics-to-deploy-up-to-150-mainspring-linear-generators-raises-over-150-million-in-series-e-round-301553403.html), 2022-05-24: "Mainspring simultaneously announced that it has closed more than $150 million in the first stage of its Series E funding, led by global growth equity investor Lightrock and joined by others including Khosla Ventures, Bill Gates, Fine Structure Ventures, the private equity firm affiliated with the pa"

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Data from Endata (https://endata.com/). Announcements are summarized from public sources and may be incomplete; check the linked originals.