Mainshares Syndicates
Invest in Profitable Small Businesses with Dennis Unrein
Exclusive Deals
Operator-Led Investments
Aligned Incentives
Why Join Dennis’ Unrein’s Syndicate?
Join Dennis Unrein’s Syndicate and gain access to exclusive, off-market investment opportunities in proven, cash-flowing small businesses (SMBs). Dennis’ Mainshares Syndicate provides accredited investors with the ability to invest passively in high-quality deals, backed by experienced operators who know how to drive growth and maximize returns.


Access to Exclusive SMB Deals
Invest in privately sourced, high-potential businesses that individual investors typically can’t access.


Operator-Led Investments
Benefit from expert due diligence, negotiation, and deal structuring to maximize returns.


Passive Investing, Active Returns
Let us handle deal sourcing, due diligence, and execution—you simply invest and reap the rewards.


Better Terms & Lower Risk
Invest alongside a lead investor who personally invests in every deal, aligning incentives for success.


No Upfront Costs
Pay only when you invest. No management fees or commitments unless you participate in a deal.
How It Works
01
Apply to Join
Get access to our private deal flow and investment memos.
02

Review Exclusive Deals

Receive detailed diligence insights and investment opportunities from Dennis.

03

Invest Alongside Dennis

Co-invest with experienced operators and investors.
04
Earn & Build Wealth
Participate in profitable SMBs with strong fundamentals and growth potential.
Don’t miss out on these exclusive investment opportunities.
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Disclosure: 

This website (the “Website”) is owned and operated by Mainshares, LLC (“Mainshares”). By accessing the Website and any pages thereof, you agree to be bound by Mainshares’ Terms of Service and Privacy Policy, as well as the Terms of Service and Privacy Policy for Main Street Securities, LLC (“Main Street”). The information contained herein is provided for informational purposes only and is not intended to influence any investment decision or be a recommendation for any investment, service, product, or other advice of any kind, and shall not constitute or imply an offer of any kind. The products and services offered by Mainshares are not offered by a certified public accountant (“CPA”) and should not be considered as a substitute for services provided by a CPA.



Broker-dealer services provided in connection with some of the investment opportunities on the Mainshares platform are offered through Main Street, a registered broker-dealer, affiliate of Mainshares, and member of FINRA/SIPC. For additional information, please contact your licensed securities representative of Main Street Securities LLC or visit FINRA’s BrokerCheck. If the investment opportunity does not include the "Brokered by Main Street Securities" designation, broker-dealer services were not provided in connection with the offering through Main Street.


Neither Mainshares nor Main Street Securities LLC make investment recommendations and no communication, through this Website or in any other medium should be construed as a recommendation for any security offered.


Should you be presented with an investment opportunity, such investment opportunities involve private, unregistered securities that are speculative and involve substantial risk. These investment opportunities are conducted in accordance with an exemption from registration, specifically relying on the private offering provision outlined in Section 4(a)(2) of the Securities Act of 1933, along with compliance with Rule 506 of Regulation D. All investments involve risk and the past performance of a security, or financial product does not guarantee future results or returns. There is always potential to lose money when you invest in securities or other financial products. Private placements lack liquidity and distributions are not guaranteed. You are strongly encouraged to seek professional advice prior to entering into any transaction for any securities and to consider your investment objectives and risks carefully before investing.


Neither the SEC nor any federal or state securities commission or regulatory authority has recommended or approved any investment or the accuracy or completeness of any of the information or materials provided herein or through any references/links herein. There can be no assurance that any valuations provided by issuers are accurate or in agreement with market or industry valuations. Neither Mainshares nor Main Street Securities LLC make any representations or warranties as to the accuracy of such information.

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