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Mongo Holdings
Barry and Gail Bierenbaum established Mongo Holdings after selling Mountain Express Oil Company in 2019. The firm began as the vehicle for their personal...
Mongo Holdings
Barry and Gail Bierenbaum established Mongo Holdings after selling Mountain Express Oil Company in 2019. The firm began as the vehicle for their personal capital generated through wholesale fuel distribution and convenience retail across the Southeast. It remains a single-family office with no external clients. Mongo Holdings allocates across real estate, private credit, digital assets, venture capital, and private equity. It executes direct co-investments and SPVs alongside fund commitments. Confirmed holdings include Grande Dunes Marina, Kings River Marina, and Maryland Marina. The office targets early-stage and seed opportunities in North America, Europe, and the Middle East & Central Asia. Grant Jaax serves as CIO and leads investment committees for local venture and real estate funds. The team maintains four additional professionals with backgrounds in aviation finance and wealth management. Barry Bierenbaum holds membership in Tiger 21. The Bierenbaum Family Foundation Inc. operates separately from the investment entity. No operational events from the last 24 months appear in public records. The office structure ties investment decisions directly to the founding principals without an external investment committee or multi-client platform. This alignment permits rapid deployment into illiquid real assets and venture positions that larger family offices often route through intermediaries.
General information
Firm type
Single Family Office
Year founded
2018
AUM
Undisclosed
Location
Region
North America
Country
United States
City
Atlanta
Corporate office
Atlanta, GA, United States
Principals
Barry Bierenbaum
CEO and Chairman
Gail Bierenbaum
Chairwoman
Grant Jaax
CEO and Chief Investment Officer
Altss tracks 1 additional named team member for this firm — including direct investment leads, IR, and operating principals not listed on the public website.
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Frequently asked questions
Who runs investment decisions at Mongo Holdings?
Grant Jaax serves as CIO and manages day-to-day allocations. Barry Bierenbaum retains final authority as CEO and Chairman.
How does Mongo Holdings source proprietary deal flow?
The firm relies on direct relationships from the Bierenbaums' prior fuel distribution business and Grant Jaax's network in Atlanta venture and real estate funds.
Does Mongo Holdings participate in fund commitments or only direct deals?
It executes both fund commitments and direct co-investments or SPVs, with flexibility stated on the firm website.
What investment stages does Mongo Holdings typically target?
The office focuses on early-stage and seed investments in addition to real asset acquisitions.
Where does the underlying wealth come from?
Wealth originated from the 2019 sale of Mountain Express Oil Company, which Barry and Gail Bierenbaum grew from one store to fuel distribution across more than 600 locations.
Does Mongo Holdings maintain philanthropic structures, and how are they separated?
The Bierenbaum Family Foundation Inc. exists separately. Barry Bierenbaum also serves on the board of Hosea Helps.
What is Mongo Holdings' known posture on co-investments alongside external GPs?
The firm states it customizes direct investments and solutions, indicating willingness to co-invest outside formal fund vehicles.
Profile maintained by Altss using OSINT (open-source intelligence), regulatory filings, licensed data partners, and verified direct submissions. Read the methodology. Last updated: . Continuous refresh with full update cycles at least every 30 days.
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