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Yoh Family Office
Yoh Family Office manages wealth from Day & Zimmermann ownership across equities, private assets and impact strategies.
Yoh Family Office
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.
General information
Firm type
Single Family Office
Year founded
1998
AUM
Undisclosed
Location
Region
North America
Country
United States
City
Philadelphia
Corporate office
Philadelphia, PA, United States
Principals
Harold L. Yoh, III
Principal
Sector focus
Frequently asked 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.
Where does the underlying wealth come from?
The wealth originates from the Yoh family’s full ownership of Day & Zimmermann, founded in 1901.
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.
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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