Sign Up Today and Learn More About Mainspring Energy Stock
Invest in or calculate the value of your shares in Mainspring Energy or other pre-IPO companies through EquityZen's platform.

Mainspring Energy Stock (MAEN)
Mainspring Energy is engineering advanced technology by developing a prototype of a linear generator that converts fuel to electricity.
About Mainspring Energy Stock
Headquarters
Menlo Park, CA, US
Total Funding
83.0M
Industries
Messaging and Telecommunications, Sports, Content and Publishing
Mainspring Energy Press Mentions
Stay in the know about the latest news on Mainspring Energy
The Week’s Biggest Funding Rounds: Safe Superintelligence’s $2B Raise Leads The Way
news • Apr 21, 2025
Power Consumption Is Rising. Energy Startup Funding? Not So Much
news • Apr 19, 2025
Mainspring Energy: $258 Million (Series F) Raised For Scaling Linear Generator Business
pulse2 • Apr 18, 2025
Mainspring Secures $258 Million in Financing to Scale Linear Generator Business; Adds Energy and Tech Leaders to Board
vcaonline • Apr 15, 2025
Mainspring Secures $258 Million in Financing to Scale Linear Generator Business; Adds Energy and Tech Leaders to Board
prnewswire • Apr 14, 2025
Investors in Mainspring Energy
Discover investors in Mainspring Energy stock and explore their portfolio companies
Mainspring Energy Management
Leadership team at Mainspring Energy
CEO and Founder
Shannon Miller
CPO and Founder
Adam Simpson

Join now and verify your accreditation status to gain access to:
- Mainspring Energy Current Valuation
- Mainspring Energy Stock Price
- Mainspring Energy Management
- Available deals in Mainspring Energy and all other companies with relevant Deal Offering documents
- EquityZen's proprietary data and insights, which may include
- Mainspring Energy Cap Table and Funding History by Share Class and Liquidity Preferences
- Mainspring Energy Revenue and Financials
- Mainspring Energy Highlights
- Mainspring Energy Business Model
- Mainspring Energy Risk Factors
- Mainspring Energy Research Report from SACRA Research
Trading Mainspring Energy Stock
How to invest in Mainspring Energy stock?
Accredited investors can buy pre-IPO stock in companies like Mainspring Energy through EquityZen funds. These investments are made available by existing Mainspring Energy shareholders who sell their shares on our platform. Typically, these are early employees who need to fund a life event – house, education, etc. Accredited investors are then offered the opportunity to invest in this stock through a fund, like those used by hedge funds serving large investors. While not without risk, investing in private companies can help investors reach goals of portfolio diversification, access to potential growth and high potential return. Learn more about our Guided Investment process here.
How to sell Mainspring Energy stock?
Shareholders can sell their Mainspring Energy stock through EquityZen's private company marketplace. EquityZen's network includes over 360K accredited investors interested in buying private company stock. Learn more about the easy and guided Shareholder process here.
If I invest, how do I exit my investment?
There are two ways to exit your private company investment on EquityZen's marketplace. The first is if the company has an exit event like an IPO, merger or acquisition. In that case, we will distribute the shares and/or cash to you directly. The second way is through an Express Deal on EquityZen, if eligible. An Express Deal allows you to sell your allocation of private shares in a given private company to another investor on EquityZen's marketplace. More information on Express Deals can be found here and exit information can be found here.
Why choose EquityZen?
Since 2013, the EquityZen marketplace has made it easy to buy and sell shares in private companies. EquityZen brings together investors and shareholders, providing liquidity to early shareholders and private market access to accredited investors. With low investment minimums through our funds and with more than 46K private placements completed across 450+ companies, EquityZen leads the way in delivering "Private Markets for the Public."