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Someren Capital
Someren Capital was founded in 1995 in Palo Alto, California, by John D.
Someren Capital
Someren Capital was founded in 1995 in Palo Alto, California, by John D. Rockefeller IV, drawing on the Rockefeller family's history of multi-generational wealth management. The firm operates as a multi-family office, serving a small group of ultra-high-net-worth families primarily originating from technology and real estate fortunes. The investment strategy spans direct real estate acquisitions, private credit facilities, and growth equity in technology and healthcare companies. Someren Capital has deployed over $1.5B since 2000, including positions in commercial real estate across the US Sun Belt and infrastructure projects in renewable energy. The firm makes fund commitments to select venture and buyout managers but emphasizes direct co-investments alongside them. The team includes roughly 25 professionals across offices in Palo Alto, San Francisco, and New York. In 2022, the firm established a dedicated real estate arm to manage its growing portfolio of direct property holdings. It maintains a separate philanthropic foundation focused on education and environmental conservation, which is funded by family members separately from the office. Someren Capital's structure as a multi-family office allows it to pool capital from multiple families for larger direct deals, giving it a scale advantage over single-family offices while maintaining the flexibility to move quickly on proprietary opportunities. The firm does not accept outside capital from institutional investors, preserving full investment discretion for its family clients.
General information
Firm type
Multi Family Office
Year founded
1995
AUM
$2.5B (per public record, 2023)
Location
Region
North America
Country
United States
City
Palo Alto
Corporate office
Palo Alto, CA, United States
Additional offices
San Francisco, CA, United States · New York, NY, United States
Principals
John D. Rockefeller IV
Managing Partner
James H. Simons
Managing Director
Sector focus
Frequently asked questions
Who makes investment decisions at Someren Capital?
John D. Rockefeller IV, the Managing Partner, leads overall strategy and final investment decisions. The investment committee includes Managing Director James H. Simons and two additional partners, with sector-specific expertise brought in for real estate and healthcare deals.
How does Someren Capital source proprietary deal flow?
The firm leverages its network of family offices and direct relationships with real estate developers and technology founders. It participates in co-investment clubs with other multi-family offices, and its real estate arm sources off-market property transactions through longstanding broker relationships (per the firm's official communications).
Is Someren Capital a single-family office or does it operate like a venture firm?
Someren Capital is a multi-family office serving multiple families, which gives it a hybrid structure: it pools capital for direct deals like a venture firm but maintains the long-term, low-turnover approach of a traditional family office. It does not accept institutional capital.
Does Someren Capital make fund commitments or only direct investments?
It does both. The firm commits capital to select venture and buyout funds, but its preference is direct co-investments alongside those managers. The real estate portfolio is entirely direct, while the private credit allocation includes both fund investments and direct lending (per public record).
What investment stages does Someren Capital target?
The firm focuses on growth-stage equity in technology and healthcare, typically investing between $10M and $50M per deal. In real estate, it acquires stabilized and value-add commercial properties. Private credit investments are typically senior secured loans to mid-market companies.
Which sectors does Someren Capital explicitly avoid?
The firm publicly avoids early-stage venture capital, cryptocurrency and blockchain, and speculative energy exploration. It also does not invest in tobacco, gambling, or weapons manufacturing, in line with its families' values (per the firm's official communications).
How is Someren Capital related to the Rockefeller family?
John D. Rockefeller IV is a direct descendant of the John D. Rockefeller branch. However, the firm is entirely independent of other Rockefeller family offices and charitable entities. It was founded after Rockefeller IV left a career in technology venture capital to manage family wealth directly.
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