Mainshares Syndicates

Invest In Profitable Small Businesses with Sunthra, managed by Kaustubh Deo

Experienced SMB owner-operator & investor

$14+ billion in M&A experience as a former Private Equity investor

Deal-by-deal opportunities

Why Join Sunthra's Syndicate?

Sunthra, led by Kaustubh Deo, offers private investment opportunities to accredited investors only, powered by Mainshares.


Access to Exclusive SMB Deals
Sunthra seeks to back high-quality SMB searchers in their small business acquisition. You invest in these deals on a deal-by-deal basis -- you stay in control of when, where, and how much to invest.
Opportunistic Deals, Not Volume
Kaustubh is the owner-operator of his own small business. Running a syndicate is not his main gig, he does not need to drive deal volume. He looks for differentiated opportunities to partner with top operators.
Alignment with Kaustubh Deo
Kaustubh invests in every deal with his own capital. He has formed Sunthra to be his long-term conduit for supporting small business entrepreneurs through strategic investment and support.
Syndicate lead has SMB & Institutional Investing Experience

Kaustubh has $14+ billion in M&A experience as a private equity investor. He has completed four search investments over the past six years as an individual investor. He has operated his own small business for 3+ years and writes an SMB blog read by over 9,000 readers.

Access to Exclusive SMB Deals
Sunthra seeks to back high-quality SMB searchers in their small business acquisition. You invest in these deals on a deal-by-deal basis -- you stay in control of when, where, and how much to invest.
Opportunistic Deals, No Volume
Kaustubh is the owner-operator of his own small business. Running a syndicate is not his main gig, he does not need to drive deal volume. He looks for differentiated opportunities to partner with top-quality operators.
Alignment with Kaustubh Deo
Kaustubh invests in every deal with his own capital. He has formed Sunthra to be his long-term conduit for supporting small business entrepreneurs through strategic investment and support.
Syndicate lead has SMB & Institutional Investing Experience
Kaustubh has $14+ billion in M&A experience as a private equity investor. He has completed four search investments over the past six years as an individual investor. He has operated his own small business for 3+ years and writes an SMB blog read by over 9,000 readers.
How It Works
01

Fill out the Application Form (takes less than 3 minutes)

Apply to see if you are eligible. Accredited Investors only.

02

Review Exclusive Deals

If eligible, receive access to our private deal flow and investment memos.

03

Invest Alongside Kaustubh

Co-invest alongside our group of growing operators and investors.

04

Potentially Earn & Build Wealth

Participate in SMB deals with strong fundamentals and look to generate potential above market returns by investing in private investments.

Don’t miss out on these exclusive investment opportunities.

Example Deal Economics

Below are example economics for what an investor in a syndicate could expect to earn on an investment that returns 3x the invested capital, based on typical syndicate fee and carry terms.
assumptions -- for Illustrative Purposes Only
Total syndicate investment
$500,000
Your Investment
$25,000
Multiple on Invested Capital (MOIC)
3x
Investment duration
5 years
Carry earned
20% of profits
Syndicate management fee
2% annually for 5 years
Mainshares Distribution

1% of Distributions

Earnings Breakdown
Gross Return (3x on $25K)
$75,000
Gross Profit
$50,000
Less: Sponsor Carry (20% of profit)
-$10,000
Less Management fees (approx. total)
-$2,500
Less: Mainshares Distribution

-$750

Net Profit (After Fees)

$36,750

Total Cash Returned to You

$61,750

Net MOIC

~2.5X

Note: Sunthra will use the 2% management fee to cover SPV formation and ongoing administration, including accounting, tax, and compliance services for the life of the hold period.
assumptions --
for Illustrative Purposes Only
Total syndicate investment
$500,000
Your Investment
$25,000
Multiple on Invested Capital (MOIC)
3x
Investment duration
5 years
Carry earned
20% of profits
Syndicate management fee
2% annually for 5 years
Mainshares Distribution
2% of Distributions
Earnings Breakdown
Gross Return (3x on $25K)
$75,000
Gross Profit
$50,000
Less: Sponsor Carry (20% of profit)
-$10,000
Less Management fees (approx. total)
-$2,500
Less: Mainshares Distribution
-$1,500
Net Profit (After Fees)
$36,000
Total Cash Returned to You
$61,500
Net MOIC
2.46X
Note: Sunthra will use the 2% management fee to cover SPV formation and ongoing administration, including accounting, tax, and compliance services for the life of the hold period.
Access private investment opportunities to accredited investors only.
Invest In SMB’s with Sunthra, managed by Kaustubh Deo
Get Started
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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 Securities LLC.


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.

Kaustubh Deo's Syndicate Application