# Mongo Holdings

Mongo Holdings is a Single Family Office based in Atlanta, United States.

## Overview

- **Organization type:** Single Family Office
- **Headquarters:** Atlanta, United States
- **Region:** North America
- **Address:** Atlanta, GA, United States
- **Founded:** 2018
- **Assets under management:** Undisclosed
- **Website:** mongoholdings.com
- **LinkedIn:** https://www.linkedin.com/company/mongo-holdings-llc

## Regulatory record

- **Reports private funds:** No

## About

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.

## Sectors

- Real Estate
- Private Credit
- Venture Capital
- Private Equity
- Digital Assets

## People

- Barry Bierenbaum — CEO and Chairman
- Gail Bierenbaum — Chairwoman
- Grant Jaax — CEO and Chief Investment Officer

## 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.

### 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.

## Related profiles

- [Monfort Companies](https://altss.com/profile/monfort-companies)
- [Monitor Capital Investments](https://altss.com/profile/monitor-capital-investments)

---

Last updated: 2026-08-10T15:54:10.904Z

Canonical page: https://altss.com/profile/mongo-holdings-barry-and-gail-bierenbaum-family-office

Maintained by Altss — https://altss.com — methodology: https://altss.com/methodology