Disrupting a 100+ Year Industry.  Built for a $400B+ Market.
Join the next generation of power innovation with LiquidPiston.
A multi-fuel engine designed for defense, aerospace, and industrial markets
$50M+ raised from almost 20,000 investors
Millions in government contracts from the US Army and US Air Force
Invest in LiquidPiston
This Reg CF offering is made available through StartEngine Primary, LLC, a member of FINRA/SIPC. This investment is speculative, illiquid, and involves a high degree of risk, including the possible loss of your entire investment.
$XXX,XXX.XX RAISED SO FAR
Over $50M Raised:
Invest in the Multi-Fuel Engine Built for a Multi-Billion-Dollar Market
Founded by a visionary father and son duo, LiquidPiston is disrupting a 100+ year industry with a patented rotary engine designed for defense, aerospace, and industrial markets. With major crowdfunding support, millions in government contracts, and 113 patents protecting their platform, they’re inviting investors to join the next generation of power innovation.
$XXX,XXX.XX RAISED SO FAR
Join the Next Generation of Power Innovation
Founded by a visionary father and son duo, we make a patented rotary engine designed for defense, aerospace, and industrial markets.
113 patents protecting our platform
Major crowdfunding support
Millions in government contracts
$XXX,XXX.XX RAISED SO FAR
REASONS TO INVEST
THE OPPORTUNITY
HELP UNLOCK UP TO $7M ARMY CATALYST match FUNDING
Every $1 invested can help unlock up to $3 of non-dilutive Army funding.

Up to $3.5M of this raise can be matched by up to $7M in Army SBIR funding through the Army CATALYST program if the Company can acquire $3.5M in funding from a non-SBIR Army Transition Partner.*
*There is no guarantee the Company will be able to secure funding from either a non-SBIR Army partner or the Army SBIR CATALYST program. However, the Company believes the Army Transition Partner (i.e. to support Army Next Generation Command and Control), may recognize this as a highly leveraged opportunity to help resolve a signature need established by the Army.
Artist rendering of 10kW Auxiliary Power Unit for next generation mobile command and control
the problem
The Engine Hasn’t Changed in Over a Century. Until Now.
Traditional engines are heavy, inefficient, and complex. Demand is increasing for efficient power delivered in a compact package.
Emerging technologies can’t rely on legacy power systems anymore.
THE SOLUTION
Our Patented
Rotary Engine
The patented X-Engine solves the many challenges of the old Wankel rotary, including cooling, sealing, lubrication, emissions and efficiency. We are creating advanced power systems for the next generation of mobility.  
THE MARKET
$400B+ Internal Combustion Engine Market
With a focus on defense, aerospace, and industrial power systems, we are currently expanding our licensing across all of those markets. Ultimately this technology could have applications in marine, UAV, urban mobility, and automotive markets as well.
Learn How LiquidPiston aims to
RevolutionizE the Engine Industry
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OUR TRACTION
Backed by $115M+ in Capital & Contracts
With multiple SBIR and OTA contracts awarded, development programs with DARPA, the US Army and US Air Force, and completed funded feasibility programs, the company is supported by $65 million in government contracts and $50M+ in investments.
We’re modernizing the traditional engine for a new era. Invest and be a part of the next evolution in power technology, today.
meet  thE team
Alexander Shkolnik
Co-Founder & CEO
  • PhD in Computer Science / Artificial Intelligence from MIT
  • 70+ patents; 30 conference and journal papers
  • PI on $20M in government R&D programs
  • Technical focus on leading teams in modeling dynamic systems, optimization & controls
Nikolay Shkolnik
Co-Founder & CTO
  • PhD in Physics from University of Connecticut (UConn)
  • Former Clean Energy Program Director, GEN3
  • Motorola award for Creativity
  • 80+ patents: engines, fuel cells, super capacitors, and other fields
  • TRIZ specialist
Per Suneby
SVP of Corporate Development and Board Director
  • MBA, Harvard; BASc Electrical Engineering, U. British Columbia
  • Seasoned Cleantech startup executive
  • Former Venture Capital Executive in Residence
  • New England Clean Energy Fellow
Vicenzo Perrone
VP of Engineering
  • Mechanical Engineering, Sapienza University of Rome
  • Extensive experience in engine development
  • Experience in business operations with leading global firms including Inveco, Deutz Fahr and John Deer
Peter Hartman
VP of Operations   
  • MSME, Mechanical Engineering, University of Michigan
  • Former Head of Powertrain Strategy, FCA & CEO
  • Oversaw development of the Gen 3 Chrysler Hemi motor
PERKS
Investment Incentive and Bonuses
Your belief in our vision deserves more, and in recognition of that support, we are extending a limited-time package of premium perks.
Time-based perks
Early Bird Bonus
Receive 15% bonus shares when you invest within the first 72 hours of launch
Invest Now
FIRST WEEK Bonus
Receive 10% bonus shares when you invest within the first 7 days of launch
Invest Now
FIRST TWO WEEKS Bonus
Receive 5% bonus shares when you invest within the first 14 days of launch
Invest Now
AMOUNT-Based Perks
Tier 1 | $2,000
Invest $2,000+ and receive LPI branded shirt
Invest Now
Tier 2 | $5,000+
Invest $5,000+ and receive LPI branded shirt & 5% bonus shares
Invest Now
Tier 3 | $10,000+
Invest $10,000+ and receive LPI branded t-shirt & 10% bonus shares
Invest Now
Tier 4 | $25,000+
Invest $25,000+ and receive LPI branded t-shirt & 15% bonus shares
Invest Now
*In order to receive perks from an investment, one must submit a single investment in the same offering that meets the minimum perk requirement. Bonus shares from perks will not be granted if an investor submits multiple investments that, when combined, meet the perk requirement. All perks occur when the offering is completed.
Crowdfunding investments made through a self-directed IRA cannot receive non-bonus share perks due to tax laws. The Internal Revenue Service (IRS) prohibits self-dealing transactions in which the investor receives an immediate, personal financial gain on investments owned by their retirement account. As a result, an investor must refuse those non-bonus share perks because they would be receiving a benefit from their IRA account. 
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The 10% StartEngine Venture Club Bonus
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LiquidPiston will offer 10% additional bonus shares for all investments that are committed by investors that are eligible for the StartEngine Venture Club.
This means eligible StartEngine shareholders will receive a 10% bonus for any shares they purchase in this offering. For example, if you buy 100 shares of common stock at $13.50/ share, you will receive 110 shares of common stock, meaning you'll own 110 shares for $1,350.00 Fractional shares will not be distributed and share bonuses will be determined by rounding down to the nearest whole share.
This 10% Bonus is only valid during the investor's eligibility period. Investors eligible for this bonus will also have priority if they are on a waitlist to invest and the company surpasses its maximum funding goal. They will have the first opportunity to invest should room in the offering become available if prior investments are canceled or fail.
Investors will receive the highest single bonus they are eligible for among the bonuses based on the amount invested and the time of offering elapsed (if any). Eligible investors will also receive the Venture Club bonus and the Loyalty Bonus in addition to the aforementioned bonus.
Liquid Piston Terms
Overview
$13.50
SHARE PRICE
$297.35M
Valuation
June 16, 2026
Deadline
$1M - $5M
Funding Goal
Breakdown
$1012.50
Min Investment
$4,999,981.50
MAX INVESTMENT
Common Stock
Shares Offered
Equity
Offering Type
74,073
Min Number of Shares Offered
370,369
Max Number of Shares Offered