# Mainspring Energy: infrastructure company

Canonical ID: `d8fb83e6-5f3d-42ad-95e5-59a2e680ace5`

## Key facts

- **AEP agreement (company-claimed, Oct 2026):** Up to 1.6 GW of Mainspring Linear Generators for [AEP](/companies/aep.md) through 2034; AEP bought a first 190 MW tranche for delivery beginning in 2027. Largest linear generator procurement to date.
- **Installed base (company-claimed):** Commercial shipments began in 2020; more than a gigawatt in advanced development and field operations for Fortune 500 companies, data centers and utilities.

- **Slug:** mainspring-energy
- **Status:** private
- **HQ:** Menlo Park, California, USA

## Models

_No models registered._

## Partnerships (1)

- [AEP x Mainspring Energy (linear generator supply)](/partnerships/aep-x-mainspring-linear-generators.md) with American Electric Power _deployment_ (announced)

## Supplies to

_No verified supply relationships on file. Supply-chain coverage is being added across the registry; check back as the seed populates this company's outbound edges._

_Outbound supply edges. Each appears when verified with at least two strong sources. Sources are append-only; corrections add new sources rather than rewrite history._

## Common questions

### What is Mainspring Energy?

Mainspring Energy makes fuel-flexible, low-emissions Linear Generators for onsite and grid power. Headquartered in [Menlo Park](/locations/menlo-park.md), [California](/locations/california.md), it began commercial shipments in 2020 and sells to commercial, industrial, data center and utility customers.

### What does Mainspring Energy make?

Mainspring Energy has no robot models recorded on the DEPLOY registry.

### Is Mainspring Energy publicly traded?

No. Mainspring Energy is privately held and not publicly traded, per the DEPLOY registry.

### How can I invest in Mainspring Energy?

Mainspring Energy is a private company; its shares are not available on public markets, so retail investors cannot buy the stock today.

### Where is Mainspring Energy headquartered?

Mainspring Energy is headquartered in [Menlo Park](/locations/menlo-park.md), [California, USA](/locations/california-usa.md).

### Who owns Mainspring Energy?

Mainspring Energy is privately held; ownership sits with its founders and private investors.

### Is Mainspring Energy a top robotics company?

On DEPLOY's intelligence score, which blends verified deployments, funding, hiring, media, safety, and IP signals, Mainspring Energy ranks in roughly the top 83% of companies tracked by the registry.


## Sources (3)

1. https://www.mainspringenergy.com/news/mainspring-energy-signs-landmark-1-6-gw-agreement-with-aep-for-reliable-affordable-power-capacity · 2026-10-13
2. https://www.prnewswire.com/news-releases/mainspring-energy-signs-landmark-1-6-gw-agreement-with-aep-for-reliable-affordable-power-capacity-302906235.html · 2026-10-13
3. https://x.com/TheLastMegawatt/status/2110474842579607772 · 2026-10-14

## The verified answers

- [Which companies have the most robots deployed](/which-companies-have-the-most-robots-deployed.md)
- [Which operators run the most robots](/which-operators-run-the-most-robots.md)
- [Which robot operators cover the most countries](/which-robot-operators-cover-the-most-countries.md)

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