Largest Family Offices in California 2026

Key Facts About California's Family Office Market

• California hosts more than 80 identified single family offices (SFOs). The true total likely exceeds 100 when multi-family offices (MFOs) and smaller operations are counted.
• Bayshore Global Management, the SFO of Google co-founder Sergey Brin, leads the state with an estimated $100 billion in assets under management (AUM) from its Palo Alto base.
• All ten of the largest California family offices by AUM operate in the San Francisco metro area. The top ten range from $3 billion to $100 billion.
• San Francisco holds the highest billionaire density of any city in the world, fueling new family office formation in the Bay Area.
• Most California SFOs pursue direct deals in the lower middle market, targeting companies with $1 million to $10 million in EBITDA.
• Tech IPO and M&A exit proceeds remain the primary catalyst for new ultra-high-net-worth (UHNW) families launching dedicated wealth offices in the state.
• Key geographic hubs span San Francisco, Palo Alto, Los Angeles, Newport Beach, Beverly Hills, and Santa Monica. Each has distinct wealth origins and capital deployment profiles.

Biggest Family Offices in California: Landscape Overview

California has more billionaires than any other U.S. state. This concentration of wealth has produced one of the densest family office ecosystems in the world. The Bay Area sits at the center, where Silicon Valley IPOs, M&A exits, and hedge fund fortunes have created dozens of SFOs managing billions in private capital.

Offices in San Francisco, Palo Alto, and Menlo Park reflect their tech-wealth origins. Many blend venture capital with direct investments in growth-stage companies. Los Angeles offers a different profile, with private wealth offices drawing from entertainment, media, real estate, and legacy industrial fortunes.

StoneCalibre runs a global buy-and-build platform from LA. Karlin Asset Management deploys capital from a medical IP settlement into public equities, real estate, and an evergreen venture fund. Orange County, especially Newport Beach, has carved out a niche for real estate-focused firms, where MIG Capital (the Merage family) operates long/short strategies alongside major property deals.

SFOs vastly outnumber MFOs in California. Most operate with direct investment mandates rather than relying on passive limited partnership allocations. A growing number of tech-wealth families channel capital into traditional industries like manufacturing, construction, and B2B services.

This shift has made California one of the most active sources of lower middle-market deal flow in the country. Deal tracking platforms count 79 closed M&A transactions among just 14 small family office investors in the state.

Family Office Comparison at a Glance

The table below compares California's leading family offices by type, estimated AUM, allocation focus, and location. Only offices with verified data appear here. AUM figures reflect the most recent available estimates.

Family Office	Type	AUM Estimate	Investment Focus	Location
Bayshore Global Management	SFO	$100B	Technology, sustainable ventures, ESG	Palo Alto
Medley Partners	SFO	Undisclosed	Buyout, growth equity, VC, real estate, credit	San Francisco
MIG Capital	SFO	Undisclosed	Funds, real estate, capital markets (long/short)	Newport Beach
Karlin Asset Management	SFO	Undisclosed	Public equities, real estate, VC, commercial finance	Los Angeles
StoneCalibre	SFO	Undisclosed	Corporate divestitures, buy & build, special situations	Los Angeles
Fernandez Holdings	SFO	Undisclosed	Middle-market businesses ($20–250M revenue)	California
Granite Point Partners	SFO	Undisclosed	Middle-market equity, growth-oriented	California
Cresset	MFO	Undisclosed	Private wealth management, estate planning, tax strategy	San Francisco
Willcrest Partners	SFO	Undisclosed	B2B service/product companies ($1–5M EBITDA)	San Francisco
Capricorn Investment Group	—	Undisclosed	Sustainable investing, renewable energy	Palo Alto
Emerson Collective	—	Undisclosed	Social impact, education, technology	Palo Alto
Coughlin Capital	SFO	Undisclosed	Lower middle-market expansion-stage companies	California

Bayshore Global Management is the clear outlier by scale, managing roughly 3.5 times the managed assets of the second-largest California office ($28 billion). Most other firms do not publicly disclose AUM, reflecting the private nature of SFO operations in this market.

Top Picks by Strategy

• Largest AUM: Bayshore Global Management manages an estimated $100 billion, with early positions in Tesla and 23andMe from its Palo Alto headquarters.
• Most Active Acquirer: StoneCalibre has completed 36 deals in North America and Europe through 7 platforms since 2012.
• Top Real Estate Allocator: MIG Capital combines long/short capital markets strategies with major property deals, including a $61 million Costa Mesa complex in 2023.
• Leading Sustainability Investor: Capricorn Investment Group focuses solely on renewable energy and positive-impact ventures from Palo Alto.
• Strongest MFO Platform: Cresset offers integrated wealth management, estate planning, tax strategy, and business liquidity planning for UHNW families from its San Francisco office.
• Best for Lower Middle Market Sellers: Caldicot Capital deploys patient capital in businesses with $1–10M EBITDA, with four completed deals including John to Go and Pacific Surfacing.
• Industrial Specialist: Shah Capital Ventures targets American manufacturing, hardware, and A&D machining companies, with holdings including TOMI Engineering and Summit Interconnect.

California's Top Family Offices in Detail

Bayshore Global Management

California's single largest private wealth office manages an estimated $100 billion for the Brin family from Palo Alto. Bayshore blends technology and ESG-compliant ventures, with early positions in Tesla and 23andMe reflecting high-conviction bets on transformative companies. The office has expanded its sustainable investing mandate in recent years, aligning its portfolio with environmental and oversight standards. Tech founders exploring co-investment in climate or deep-tech ventures will find Bayshore's mandate among the most aligned in the state.

StoneCalibre

No California family office matches StoneCalibre's deal volume. The LA-based SFO has acquired 36 companies through 7 different platforms in North America and Europe. Its strategy centers on corporate divestitures, buy-and-build roll-ups, and special situations via control transactions.

Notable portfolio companies include Serviquimia, Data 911, Amtel, and XMedius. With offices in Los Angeles, Paris, and London, StoneCalibre offers a global reach uncommon among single family offices. Business owners weighing a sale to a patient, operationally involved buyer should note StoneCalibre's record of building multi-company platforms rather than flipping individual assets.

Medley Partners

The Jim Simons family office invests from San Francisco with a diversified LP mandate spanning buyout, growth equity, venture capital, real estate, and credit. Medley Partners allocates capital in the United States, Europe, and Asia, reflecting the global outlook of its hedge fund origins. Siva Power, an innovative thin-film solar company, stands out among its portfolio holdings. Medley ranks among the most informed capital sources in the Bay Area for fund managers seeking LP backing with deep quantitative roots.

Karlin Asset Management

A $1.4 billion Medtronic intellectual property settlement created Karlin Asset Management. The firm deploys capital from Los Angeles into public equities, real estate, commercial finance, and mortgage lending. Its evergreen venture arm, Karlin Ventures, writes checks of $100,000 to $1 million in early-stage startups, with recent allocations to Embrace and Getlabs.

This mix of defensive real assets and high-risk venture bets makes Karlin one of the more diversified SFOs in Southern California. Early-stage founders in LA seeking small but meaningful seed checks should explore Karlin Ventures' ticket range.

MIG Capital

The Merage family launched MIG Capital after selling Chef America for $2.6 billion in 2002. Based in Newport Beach, MIG runs a distinctive combination of fund allocations, real estate, and long/short capital markets strategies. Its 2023 purchase of a $61 million complex in Costa Mesa shows continued appetite for large property deals in Orange County. MIG stands as the clearest example of consumer-product wealth recycled into a diversified SFO with active real estate and public markets mandates.

Fernandez Holdings

Fernandez Holdings ranks among the most prolific acquirers in California, with 28 closed deals. The SFO targets well-managed middle-market businesses with $20 million to $250 million in revenue, then invests in incremental improvements rather than radical restructuring. Recent portfolio additions include Mountain View Equipment, Theriault Equipment, Harvest Equipment, and ALL POWER. This patient, improvement-focused model sets Fernandez apart from typical private equity buyers in the $20M+ revenue range.

Willcrest Partners

Willcrest Partners targets B2B service and product companies with $1 million to $5 million in EBITDA from its San Francisco base. This size range falls below most institutional private equity thresholds. With 6 closed deals including Birch Risk Advisors, Worldwide Healthstaff Solutions, and Precision Aerospace, Willcrest combines equity with hands-on operational support. Its owner-operator model suits small B2B owners who want growth capital and a hands-on post-close partner.

Cresset

Cresset is the strongest multi-family office platform with a California presence. Its San Francisco team serves UHNW families, founders, and entrepreneurs with private wealth management, estate planning, tax strategy, and liquidity planning. The firm operates under a fiduciary standard and maintains 20+ offices nationwide. Few California MFOs match Cresset's depth for families needing integrated wealth preservation, succession planning, and family governance under one roof.

Investment Trends Shaping California's Family Offices

Direct Deals Over Passive LP Investing

California SFOs are shifting capital from fund commitments to direct company ownership. Willcrest Partners, Caldicot Capital, and Coughlin Capital all pursue owner-operator models, buying businesses outright rather than investing as limited partners. This trend is strongest in the lower middle market, where deal sizes of $1 million to $10 million in EBITDA sit below the radar of institutional private equity but match the flexible mandates of family capital.

Tech Wealth Flowing Into Traditional Industries

Bay Area wealth managers are redeploying tech fortunes into manufacturing, industrials, and B2B services. Shah Capital Ventures targets American machining and hardware companies. Fernandez Holdings focuses on middle-market operators with $20–250 million in revenue.

This capital flow reflects tech founders' desire for cash-flowing businesses with tangible assets. The shift moves away from the high-growth, high-burn models that generated their original wealth.

ESG and Impact Investing From Palo Alto

Bay Area offices lead the country in ESG adoption among private wealth platforms. Capricorn Investment Group dedicates its mandate to renewable energy and sustainable ventures. Bayshore Global Management has expanded ESG-compliant positions alongside its technology portfolio.

Emerson Collective, also based in Palo Alto, channels capital into social impact and education. This cluster of impact-oriented firms gives California a unique position in sustainable private capital.

Cross-Border Deal Activity

Several California SFOs operate well beyond state or national borders. StoneCalibre maintains offices in LA, Paris, and London, completing 36 deals in North America and Europe. Medley Partners commits to buyout, growth equity, and credit in the U.S., Europe, and Asia.

California's global ties give these offices deal flow that most domestic firms cannot replicate. The Bay Area connects to Asian markets, while LA links to Latin America.

How to Evaluate Family Offices in California

California's density of private wealth offices creates an unusual challenge: too many options with too little public data. Most SFOs in the state do not disclose AUM, fee structures, or portfolio details. Verifying an office's claims requires checking deal history through wealth databases. Industry data identifies 51 active California family offices and tracks 14 smaller operators with 79 closed deals among them.

Wealth origin matters more in California than in most markets. A tech-wealth SFO in Palo Alto, like Bayshore or Capricorn, may evaluate a deal through a growth and scalability lens. A real estate-origin firm in Newport Beach, like MIG Capital, will prioritize cash flow and asset value. Matching your sector to the family's industry expertise reduces friction in due diligence and post-close operations.

California's high state income tax also shapes family office behavior. The tax burden pushes offices toward efficient structures, including trusts, charitable vehicles, and holding companies. Families evaluating an MFO should assess its tax strategy and estate planning depth, not just returns. Cresset, for example, provides integrated tax and succession planning that investment-only firms cannot match.

Timeline flexibility is another key factor for this market. Caldicot Capital explicitly offers "patient capital" for lower middle-market deals, while StoneCalibre executes faster buy-and-build roll-ups. Understanding whether an office's holding period aligns with your own timeline prevents mismatched expectations after a deal closes.

Which Family Office Fits Your Needs?

UHNW families seeking full-service wealth management should explore Cresset's San Francisco office for integrated estate planning, tax strategy, and multigenerational wealth transfer. Cresset operates as a multi-family office with the breadth of services that single-focus firms cannot provide.

Business owners preparing for a liquidity event need to match their company's size to the right buyer. Willcrest Partners targets B2B companies with $1–5 million in EBITDA, while Fernandez Holdings seeks operators in the $20–250 million revenue range. For industrial and manufacturing businesses, Shah Capital Ventures and BDX Capital bring sector-specific operational expertise. Each of these SFOs prefers long-term ownership over quick exits, making them strong partners for founders who care about their company's post-sale trajectory.

Tech founders after a major exit can align with offices that share their capital deployment philosophy. Bayshore Global Management and Capricorn Investment Group both operate from Palo Alto with mandates in technology and sustainable ventures. Fund managers seeking LP capital should focus on Medley Partners, which commits to buyout, growth equity, and venture funds with a global mandate spanning three continents.

Methodology

This guide to the biggest family offices in California draws on data from multiple wealth databases and deal tracking platforms. Sources include listings of 51 active offices, records of 14 small family office investors with 79 total deals, and industry rankings of the top 10 by AUM. Office profiles rely on verified deal histories, publicly available records, and platform-sourced descriptions as of early 2026. AUM figures appear only where third-party data exists. Offices without verified AUM carry the label "Undisclosed." This article excludes offices that lack sufficient public information to verify their capital deployment activity or operational status.