The Defense Startup Boom Has a Public-Market Problem

Andreessen Horowitz is opening an office in West Palm Beach next year. a16z plans to open a regional headquarters for its defense practice there in 2027. The headline reads like a commercial lease. It isn't.

The venture capital firm that helped build the consumer internet is moving physical presence to Florida to focus on defense investments. This is the "American Dynamism" practice — a16z's bet that the next generation of U.S. advantage in aerospace, autonomous systems, and defense technology will come from startups, not legacy contractors. West Palm Beach is where the Pentagon's money is clustering, and where a16z has decided to sit close to it.

The question for investors isn't about the lease. It's about what a16z is signaling and whether there's a publicly tradeable way to follow the thesis.

What American Dynamism actually funds

a16z launched its defense-focused investing around 2020 with a $600 million fund. The practice has since grown to cover aerospace, defense, public safety, education, housing, supply chain, and manufacturing. The firm now has over $15 billion under management spread across growth, infrastructure, bio, apps, and defense. American Dynamism is the label for the part that views the government as a customer, not a regulator.

Most venture capital targets consumers or businesses. Those customers can be won with a better interface, lower price, or network effects. Defense startups sell to the U.S. government — one customer, one procurement system, one budget cycle. a16z's co-leader David Ulevitch has said the practice focuses on "mission-driven and civic-minded founders" who view government as a customer, competitor, or key stakeholder — "mission-driven and civic-minded founders"..

That changes the rules. Revenue growth still matters, but it depends on contract awards, not product-market fit in the Silicon Valley sense. A startup can build an amazing autonomous drone system and still need years of certification, security clearance, and Pentagon approval to sell it.

The numbers behind the migration

Global defense spending rose 9.4% year-over-year to $2.7 trillion in 2024 — the fastest annual increase since the end of the Cold War. It is projected to grow at a 5% annualized rate, reaching $3.6 trillion by 2030.

Within that wave, the startup layer is where the story lives. Shield AI, valued at $12.7 billion, went public in 2026 after three years building autonomous drones for GPS-denied combat scenarios. Anduril — co-founded by Oculus creator Palmer Luckey and backed by Andreessen Horowitz in a round that doubled its valuation to $60 billion — generated $2.2 billion in revenue in 2025, up 120% from $1 billion in 2024, and is guiding to roughly $4.3 billion in 2026. Anduril is in talks to raise fresh funding at close to $100 billion.

Florida is the gravitational center for this migration. Between 2020 and 2025, dozens of companies moved their headquarters to Florida as part of a broad relocation wave. West Palm Beach specifically posted a 19.9% year-over-year increase in average lease size, with trophy/A space leading the gain. Financial firms, defense contractors, and VC outposts are all converging there. a16z's move puts them in a Related Ross development — one of two new Class AA office towers, 10 and 15 CityPlace, in downtown West Palm Beach.

This isn't a coincidence. No tax, no regulation, proximity to military installations, and a growing pool of defense talent drawn from the East Coast financial and tech sectors. The place is becoming what its boosters call the "Wall Street of the South" — but for defense capital.

The gap between the thesis and what you can buy

Here's where the story becomes practical. The companies generating the most excitement — Anduril, Shield AI, the startups a16z is funding through American Dynamism — are largely private. Shield AI just IPO'd, but most of this portfolio won't be publicly accessible for years, if ever.

The publicly tradeable defense bet today is the Global X Defense Tech ETF (SHLD), which holds 55 companies with a $6.9 billion market cap. Its top holdings are a mix of legacy primes and one tech-native name: Lockheed Martin (9%), RTX (8%), General Dynamics (7%), Rheinmetall (6%), Palantir (6%), Hanwha Aerospace (5%), BAE Systems (5%), and L3Harris (5%).

The legacy names carry different economics than the startups. Lockheed Martin trades at 19x trailing earnings with a 2.6% dividend. RTX trades at 34x with a 1.4% yield. Northrop Grumman is at 16x with a 1.8% yield. These are profitable, dividend-paying companies with decades of contract history. They're also down meaningfully from their highs — SHLD itself is down about 4% year-to-date and nearly 12% over the last 20 trading days.

The tension is clear. The legacy primes that dominate SHLD are exactly the kind of companies a16z is trying to bypass. The startup thesis depends on the Pentagon eventually buying from Anduril and Shield AI at scale, which would come at the expense of the old guard. But until those companies grow large enough to matter at an ETF level — or until their IPOs price and list — the publicly available exposure is to the incumbents.

Palantir, at 6% of SHLD, is the closest bridge. It's a public company that sells government AI platforms and has scaled to multi-billion-dollar revenue. But even Palantir's valuation has pulled back sharply from its peak, suggesting investors aren't sure how fast defense contracts translate into public-market pricing power.

What to test

The defense tech boom is real. The spending trajectory is bipartisan, the contract pipeline is visible, and the startups are shipping actual systems that the military uses. a16z opening an office in West Palm Beach is a vote of confidence from one of the most successful capital allocators in modern tech.

But the investable path has a friction point. The companies driving the narrative are private. The public names that offer exposure today are the legacy contractors — which may be solid businesses but are not the same bet a16z is making. SHLD tracks both, and the result is a fund that's up over 200% since inception but flat this year, pulled between legacy stability and startup momentum that hasn't fully reached the public market yet.

The testable question is simple: Watch what happens when the next defense startup IPOs. Does the market price it like a technology company or like a government contractor? The answer will tell you whether the public market believes the old rules still apply — and whether the legacy names in your ETF are buying time or losing it.