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Benjamin Horowitz
Ben Horowitz's family office invests his personal capital across early-stage startups, digital assets, and Web3 from Menlo Park.
Benjamin Horowitz
Ben Horowitz's family office was established after his career as co-founder of the venture capital firm Andreessen Horowitz (a16z) in 2009, which grew to manage over $42 billion. The wealth origin is tied to Horowitz's prior success as a technology executive and co-founder of Opsware (sold to Hewlett-Packard in 2007 for $1.6 billion, per The New York Times, 2007) and his ongoing general partnership role at a16z (per public record). The office's strategy spans multiple asset classes, including direct equity investments in startups, digital assets, and alternative venture structures like rolling funds and special-purpose vehicles. Sector focuses include FinTech (e.g., Coinbase investment via a16z), ClimateTech, Workflow Automation, Media & Entertainment, and Web3 & Blockchain. The geographic focus is primarily North America, with capital deployed across Seed, Early Stage, and Growth stages (per public record). Confirmed portfolio exposures include Coinbase, OpenAI, and various a16z-led deals where Horowitz invested personally. Total AUM is undisclosed. Team size and office structure are not publicly reported. The office operates without a separate LinkedIn presence or dedicated website, functioning as a lean entity tied to Horowitz's personal wealth. No philanthropic foundation or adjacent operating vehicles have been publicly confirmed as separate from a16z's broader activities. The structural differentiator is its symbiotic relationship with Andreessen Horowitz: the office leverages a16z's proprietary deal flow and network while maintaining independent capital allocation. This allows Horowitz to participate in a16z-led deals personally and also pursue investments outside the firm's mandates (e.g., direct digital asset holdings). Succession and governance details are not public.
General information
Firm type
Single Family Office
Year founded
—
AUM
Undisclosed
Location
Region
North America
Country
United States
City
Menlo Park
Corporate office
Menlo Park, CA, United States
Principals
Ben Horowitz
Co-founder and General Partner, a16z (separate firm)
Sector focus
Frequently asked questions
Who runs investment decisions at this family office?
Ben Horowitz, co-founder of Andreessen Horowitz, makes the investment decisions for his personal family office (per public record). The office does not publicly list other investment professionals.
How does this office source deal flow?
The office likely leverages the network of Andreessen Horowitz, where Horowitz remains a general partner. This gives him access to proprietary deal flow from a16z's scouting operations, as well as external opportunities sourced through his personal relationships (per public record).
Is this structured as a single family office or does it operate more like a venture firm?
It is a single family office managing Ben Horowitz's personal wealth. Unlike a16z, which operates as a registered investment advisor managing external LP capital, this office invests solely for Horowitz's account and does not market to third-party investors (per public record).
Does this office participate in fund commitments or only direct deals?
The office primarily makes direct investments. Horowitz has been known to personally invest in a16z-managed funds (per public record). However, the office has not been documented as committing capital to external GP funds.
What investment stages does this office target?
The office targets Seed, Early Stage, and Growth rounds. This mirrors the stage range of a16z, though Horowitz's personal portfolio may skew earlier-stage given his history as a seed investor in companies like Coinbase and OpenAI (per public record).
Where does the underlying wealth come from?
Wealth originated from the $1.6 billion sale of Opsware to Hewlett-Packard in 2007, plus carried interest earned as a co-founder of Andreessen Horowitz (per The New York Times, 2007; The Wall Street Journal, various years).
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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