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Andreessen Horowitz (a16z) was founded in 2009 by Marc Andreessen and Ben Horowitz and has grown into one of the two largest venture capital firms in the world, managing over $90 billion in assets. The firm commands approximately 18% of all venture capital dollars allocated in the United States.
In January 2026, a16z raised $15 billion across five new funds, including $6.75B for growth, $3.5B for AI applications, $1.7B for AI infrastructure, $2.5B for American Dynamism, and $1.12B for national interests. This followed a $7.2B raise across five funds in April 2024.
The firm has a team of 470 members including 311 partners, making it one of the largest VC organizations in the world. a16z pioneered the "platform" model in venture capital, building massive operating teams to support portfolio companies across recruiting, media, marketing, and go-to-market.
a16z's founding thesis, "Software is eating the world," has evolved to "AI is eating software." The firm seeks non-consensus founders building companies with bold ideas that most people doubt will work. AI-related companies represented over 50% of new deals in 2025, with 440+ AI companies in the portfolio.
Key focus areas include AI/ML (dominant), consumer (23% of portfolio), enterprise (22%), fintech (18%), bio + health (14%), crypto (13%), games, and American Dynamism (defense, space, manufacturing, robotics). The firm is truly stage-agnostic with dedicated early-stage and growth vehicles.
a16z is invested in 10 of the top 15 most valuable private companies: OpenAI, SpaceX, xAI, Databricks, Stripe, Revolut, Waymo, Wiz, SSI, and Anduril. The portfolio includes 1,076+ companies, 121 unicorns, and 35+ public offerings.
Recent highlights: Anduril ($2B Series G, $30B valuation), Abridge ($600M Series F, $15B), Apex Space ($316M Series E, $5.3B), Hadrian ($0.8B raise), Groq (co-led with BlackRock). Recent IPOs include Figma (NYSE, $13.5B) and Navan (NASDAQ, $5.82B).
Earlier iconic investments include Facebook/Meta, GitHub, Airbnb, Coinbase, Instagram, Instacart, Roblox, and Clubhouse.
To approach Andreessen Horowitz, founders should submit their pitches through the firm's website at a16z.com/connect. The firm is open to cold pitches and actively seeks innovative ideas from first-time founders.
Andreessen Horowitz runs the Speedrun accelerator, which invests up to $1 million per company across approximately 60 startups per cohort. The firm also launched a Biotech Ecosystem Fund in partnership with Eli Lilly, providing up to $500 million for biotech ventures.
In January 2026, Andreessen Horowitz raised $15 billion across five new funds, including a $6.75 billion growth fund and a $3.5 billion fund for AI applications. The firm has been highly active, making 172 investments in 2025 alone, with notable recent investments in companies like Anduril and Abridge.
Andreessen Horowitz invests across all stages, including Seed, Series A, Series B, Series C, Growth Equity, and Pre-IPO.
You can pitch Andreessen Horowitz through their website at a16z.com/connect.
The firm focuses on sectors such as AI, fintech, gaming, and generative AI, among others.
Andreessen Horowitz typically invests between $750K and $500M in their portfolio companies.
Andreessen Horowitz primarily invests in the United States, with a recent expansion into Asia for its crypto practice.
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