# Yoh Family Office

Yoh Family Office is a Single Family Office based in Philadelphia, United States.

## Overview

- **Organization type:** Single Family Office
- **Headquarters:** Philadelphia, United States
- **Region:** North America
- **Address:** Philadelphia, PA, United States
- **Founded:** 1998
- **Assets under management:** Undisclosed
- **Website:** dayzim.com
- **LinkedIn:** https://www.linkedin.com/in/halyoh/

## Regulatory record

- **Reports private funds:** No

## About

Yoh Family Office was founded in 1998 by the Yoh family to oversee capital generated by their full ownership of Day & Zimmermann, the construction, engineering, staffing and defense company started in 1901. The office invests in public equities, private equity, private credit, infrastructure and secondaries. It also runs direct co-investments and SPVs alongside philanthropic and mission-related mandates. Activity spans North America, Europe and Asia with exposure to healthcare services, industrial technology, HRTech and digital health. Day & Zimmermann leadership includes Harold L. Yoh, III and Mike Yoh. No recent operational events from the family office itself appear in available records.

## Sectors

- Healthcare Services
- Industrial Tech
- HRTech
- Digital Health

## People

- Harold L. Yoh, III — Principal

## Questions

### Who runs investment decisions at Yoh Family Office?

Harold L. Yoh, III serves as the named principal. Decisions integrate family governance with the operating company’s industrial base.

### Does Yoh Family Office participate in fund commitments or only direct deals?

The office uses both direct co-investments and SPVs as well as private equity and secondaries vehicles.

### Which sectors does Yoh Family Office target?

Confirmed focuses include healthcare services, industrial tech, HRTech and digital health.

### What geographies does Yoh Family Office cover?

Allocations reach North America, Europe and Asia.

## Related profiles

- [Y K Almoayyed & Sons](https://altss.com/profile/y-k-almoayyed-sons)
- [York Management & Research](https://altss.com/profile/york-management-research)

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

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