# JZJ Holdings

JZJ Holdings is a Single Family Office based in Upper Saddle River, United States.

## Overview

- **Organization type:** Single Family Office
- **Headquarters:** Upper Saddle River, United States
- **Region:** North America
- **Address:** Upper Saddle River, United States
- **Founded:** 2014
- **Assets under management:** Undisclosed
- **Website:** jzjholdings.com
- **LinkedIn:** https://www.linkedin.com/company/jzjholdings

## Regulatory record

- **Reports private funds:** No

## About

JZJ Holdings was established in 2014 by David B. Rosen. The office manages family capital with an emphasis on direct investments rather than broad fund commitments. The firm deploys across real estate, operating businesses, private equity, and venture capital. It participates in angel, seed, and early-stage rounds as well as private credit and intellectual property transactions. Confirmed geographic reach includes North America, Asia, and the Middle East. Technology interests span AI/ML, biotech, and enterprise software. David B. Rosen previously co-founded Rising Pharmaceuticals and DASH Pharmaceuticals, the latter acquired by Natco Pharma Ltd. in 2021. The David and Masako Rosen Family Foundation serves as the primary philanthropic vehicle. No additional offices or team size figures are disclosed.

## Sectors

- Healthcare Services
- FinTech
- PropTech
- Digital Health
- Media & Entertainment
- AgriTech & FoodTech
- Mobility & Transportation

## People

- David B. Rosen — Managing Partner
- Masako Rosen — Trustee

## Questions

### Who runs investment decisions at JZJ Holdings?

David B. Rosen serves as Managing Partner and directs investment activity. Masako Rosen acts as Trustee of the related family foundation.

### Does JZJ Holdings participate in fund commitments or only direct deals?

The firm executes direct and syndicated investments alongside select fund-of-funds exposure. It also holds intellectual property and royalty positions.

### What investment stages does JZJ Holdings typically target?

Activity spans angel through Series B rounds as well as later private equity and real estate transactions.

### Where does the underlying wealth come from?

Wealth origin is not publicly disclosed beyond David B. Rosen's prior pharmaceutical ventures.

### How is JZJ Holdings related to the David and Masako Rosen Family Foundation?

The foundation functions as the family's primary philanthropic structure and is separate from the investment office.

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- [JurisTax Group](https://altss.com/profile/juristax-group)
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Last updated: 2026-06-03T20:00:00.000Z

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