# OpenBox

OpenBox is a Single Family Office based in Brooklyn, United States.

## Overview

- **Organization type:** Single Family Office
- **Headquarters:** Brooklyn, United States
- **Region:** North America
- **Address:** Brooklyn, United States
- **Founded:** 2009
- **Assets under management:** Undisclosed
- **Website:** opnbx.com
- **LinkedIn:** https://www.linkedin.com/company/opnbx

## Regulatory record

- **Reports private funds:** No

## About

OpenBox was established in 2009 by Marquise Stillwell. The firm allocates on behalf of its founding family through a mix of direct holdings and external partnerships. Investment activity covers direct co-investments and SPVs alongside fund-of-funds commitments. Real estate and philanthropic vehicles form additional sleeves. Confirmed geographic reach includes North America, Europe, and Asia. Sector exposure spans PropTech, ClimateTech, FinTech, EdTech, and Healthcare Services. The team operates from Brooklyn headquarters with an additional New York office. No AUM figure or headcount is publicly stated. No operational events from the past 24 months appear in available records. OpenBox integrates design and research capabilities through its studio practice, which informs project selection in urban and community-focused investments.

## Sectors

- PropTech
- GovTech
- AgriTech & FoodTech
- Circular Economy
- ClimateTech
- EdTech
- Healthcare Services
- Sports & Wellness
- FinTech
- Media & Entertainment

## Offices

- New York, NY, United States

## People

- Marquise Stillwell — Founder and Principal
- Monica Morell — Chief of Staff
- Amy Wang — Managing Partner

## Questions

### Who runs investment decisions at OpenBox?

Marquise Stillwell serves as Founder and Principal. Amy Wang holds the title of Managing Partner. Monica Morell acts as Chief of Staff.

### Does OpenBox participate in fund commitments or only direct deals?

The firm uses both direct co-investments via SPVs and fund-of-funds commitments. Real estate and philanthropic sleeves supplement the mix.

### What investment stages does OpenBox typically target?

No stage preference is stated in available records. Activity spans early and growth opportunities within listed sectors.

### Where does the underlying wealth come from?

Wealth origin is not publicly attributed to a specific operating company or industry.

### How is OpenBox related to its design studio practice?

The studio conducts research and design work at the intersection of people, cities, and planet. This practice supplies insights for investment selection.

## Related profiles

- [Opal Family Office](https://altss.com/profile/opal-family-office)
- [Opus 8](https://altss.com/profile/opus-8)

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Last updated: 2026-06-03T20:00:00.000Z

Canonical page: https://altss.com/profile/openbox

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