Europe is about to spend a fortune on air defense. Most of it won’t come to U.S. vendors.

If you run strategy for a U.S. defense prime, the European air-defense story may seem like a windfall: a continent that neglected air and missile defense for thirty years is now committing to an IAMD shield estimated at €200–320bn this decade, a quarter to two-fifths of Europe’s entire ~€800bn rearmament envelope. The instinct is to treat that as a demand signal and reach for the export catalog.

That instinct is about to cost U.S. primes real share, because it misreads what Europe is buying and who is legally allowed to sell it.

Start with capability. Across the eight layers of a modern air-and-missile-defense architecture, U.S. contractors lead decisively in only two: battle management (IBCS) and GaN radar (LTAMDS). The long-range tier is now shared, not owned. The entire counter-UAS-to-medium-range stack is a European stronghold. The sovereign upper tier belongs to Israel, not the U.S., because THAAD and Aegis are largely U.S.-operated NATO fixtures rather than systems a European government can own outright. The market is not “American systems with European add-ons.” It is the reverse.

Then layer on the rules and regulations, which are the real story. EU funding now carries a “Buy European” bias written into law. The €150bn SAFE instrument requires at least 65% of programmatic value to originate inside the EU single market, with design-authority conditions for air defense that a U.S.-controlled prime cannot meet alone. EDIP caps non-EU content at 35% and mandates full European design authority by 2033. The effect is a market splitting in two: an EU-funded pool structurally closed to U.S. full systems, and a national-budget pool (Poland, the Netherlands, Romania) that stays open. Each quarter, more money flows through the first.

The proof is already on the board. In September 2025, Denmark chose the Franco-Italian SAMP/T NG over Patriot in a head-to-head long-range contest. Patriot did not fall short on capability; Denmark chose SAMP/T NG on delivery speed and in-region production instead. It was the first outright European win of its kind. Meanwhile, Patriot’s own success has become a liability. New-battery lead times have pushed past 2032, and every American delivery slip hands MBDA, Diehl, and Saab their strongest sales line. Supply availability is now a competitive weapon, and it does not favor U.S. vendors.

So where does that leave a U.S. prime? Not chasing new long-range fly-offs; that is a shrinking, contested segment and the wrong place to anchor a European thesis. The defensible value where the rules and politics cannot easily close: C2 and integration, where IBCS is sticky and central to the “any sensor, any shooter” problem Europe cannot yet solve; GaN sensors, which draw a softer “Buy European” reflex than shooters do; interceptors and magazine depth, a decades-long annuity off the installed Patriot base; sustainment, which is largely insulated from industrial-policy politics; high-value sub-tier content, where seekers and guidance alone are roughly 40% of a missile’s build cost and the 65% rule still leaves about 35% of headroom; and co-production, the actual price of admission.

Poland is the template with the U.S. at the top of the stack (Patriot, LTAMDS, IBCS as the backbone), European at the bottom (CAMM-ER for Narew, built under license by PGZ), everything localized. The primes that win the next decade will look less like exporters and more like embedded industrial partners, building solid-rocket-motor lines in Germany, attitude-control motors in Poland, and sustainment centers in Finland.

The uncomfortable implication is that winning requires trading the highest-margin fantasy of full-system dominance for the highest-probability reality: owning the layers Europe cannot yet build, produced on European soil before the rules force the question. Produce in-region, or cede the ground.