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mainspringenergy.com
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Mainspring Stock

Company Profile:

Mainspring Energy is a technology company focused on providing clean and reliable power solutions through its innovative Mainspring Linear Generator. Founded with the vision of supporting a net-zero carbon grid, Mainspring aims to deliver local power generation that can adapt to various fuel types and operational needs.

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  • Headquarters: Menlo Park, CA
  • Year Founded: 2010
  • Sector: Energy

Mainspring Stock Price Chart

Mainspring Stock Price Per Share

$4.01 -$3.35 (-45.52%)
Updated Feb, 2026
6 Months 12 Months 24 Months
Mainspring Stock Price Per Share
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Mainspring Management Team

  • Co-Founder, CEO, Director

    Shannon Miller

  • COO

    David DeGraaff

  • Chief Commercial Officer

    Jim Dawe

  • Board Member

    Samir Kaul

  • Board Member

    Eric Kosmowski

  • Chief Communications Officer

    Maria Amundson

  • Board Member

    Shyam Kamadolli

  • Co-Founder, Chief Product Officer, Director

    Adam Simpson

  • Co-Founder, Chief Technology Officer

    Matt Svrcek

  • Board Member

    Alexander Weiss

  • Board Member

    Jagdeep Singh

  • Board Member

    Nael Kassar

Mainspring Major Investors

  • ClearSky Ventures

  • 40 North Management

  • Statoil Energy Ventures

  • KCK Group

  • Devonshire Investments

  • Canada Pension Plan Investment Board (CPPIB)

  • Lineage Logistics

  • Centrica Innovations

  • Lightrock

  • American Electric Power (AEP)

  • Khosla Ventures

  • Fine Structure Venture

  • Princeville Global

  • Shell Ventures

  • Hanwha Venture Capital Corporation

Learn More About Mainspring Stock

Buy Mainspring Stock
01

Mainspring stock does not trade on public stock exchanges. Mainspring stock is considered a private security and you need to be an accredited investor to trade shares. To invest in Mainspring stock you can either buy shares directly through the company or work with a secondary trading marketplace like Nasdaq Private Market.

Learn more about the secondary market for private company shares on the investors page.

Sell Mainspring Stock
02

Mainspring Stock does not trade on public stock exchanges. In order to sell Mainspring shares you need to work directly with the company or with a secondary trading marketplace like Nasdaq Private Market. NPM has more than a decade of experience helping sell shares on the private market to our network of institutional investors.

Learn more about NPM services for selling privately held stock on the Employee Shareholders page.

Read more about how to sell private company stock on the private secondary market:

Mainspring Stock Price
03

Nasdaq Private Market estimates that Mainspring price per share was $4.01 last month. This Mainspring share value estimate (known as the Tape D™ price) is based on market activity, publicly-sourced valuation data, and other proprietary information. With Tape D premium for investors, you can get visibility into the Mainspring share price today and the factors driving Mainspring valuation estimates. Learn more about premium data here.

Read more about private company stock prices: Understanding the Bid-Ask Spread: How Buyers and Sellers Match on Price

Mainspring Stock Ticker Symbol
04

There is no ticker symbol for Mainspring stock because it is a private company. Private companies do not have ticker symbols like public companies, they are identified primarily by using the company ‘street’ name or legal name.

Criteria to Sell Mainspring Stock
05

Nasdaq Private Market currently works with employees, ex-employees, and other company investors. In order to sell Mainspring stock you need to receive the company’s approval, which Nasdaq Private Market manages on your behalf.

Learn more about selling privately held stock on the Employee Shareholders page.

Read more about how to sell shares of a private company and eligibility for selling privately held stock:

Criteria to Buy or Invest in Mainspring Stock
06

Currently, Nasdaq Private Market only works with accredited entities and institutional investors to purchase private company stock. In order to invest in Mainspring stock, you need to be an accredited entity or institutional investor.

Learn more about the Nasdaq Private Market tool kit for investors on the Investor Trading page.

Mainspring Stock Settlement
07

Once you buy or sell, stock share ownership must transfer before funds are wired. With Nasdaq Private Market, clients leverage our patent-pending Transfer and Settlement technology which streamlines and manages transfer activity from match to settlement.

To learn more about private company stock Transfer and Settlement, check out the Transfer and Settlement page.

Mainspring IPO
08

Mainspring is a private company and has not had an IPO. There is currently no Mainspring IPO price. Get started to begin exploring the Nasdaq Private Market Tape D™ database and gain access to actionable data related to Mainspring IPO.

Learn more about Tape D™ private company stock data for institutional investors on the on the Tape D™ Product Page.

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*All trademarks are the property of their respective owner(s). Unless expressly stated otherwise, companies listed on this site are not sponsoring, endorsing, or otherwise affiliated with, Nasdaq Private Market, LLC, and none of the statements on this website should be attributed to a listed company.

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Source: Nasdaq Private Market Tape D®