How to Break Into Aerostructures: Who Still Qualifies

The world’s largest independent aerostructures supplier no longer exists. How does that change who gets to build airplanes? If Spirit is gone, how does anyone new get in?

First, what happened? Boeing closed its $4.7bn purchase of Spirit AeroSystems on December 8, 2025. Including debt, the enterprise value was $8.3bn. Airbus closed on its carve-out the same day. Boeing took roughly 15,000 workers and Airbus about 4,000, per Aviation Week.

Boeing spun out Spirit in 2005. Twenty years of outsourcing ended in a buyback. No surprise, the OEMs called it control.

Spirit paid Airbus $439m to take the loss-making sites. Airbus also extended $200m in interest-free credit to keep parts flowing during the transition. That tells you what the work was worth to an independent. These sites had been losing money on both OEMs’ contracts, as we noted then.

The consensus read is that this fixes quality. Boeing’s Kelly Ortberg said in October 2025 that Spirit fuselage quality was already improving. Maybe. The other effect gets less attention. The single biggest open-market node in the aerostructures supply chain is now captive.

Meanwhile, the newcomers are not standing still. At Farnborough in July, Mubadala’s Strata signed an MoA with Embraer to assess E2 composite work packages. FACC added a second Airbus work package for India’s Kineco. Mahindra Aerostructures signed for metallic parts across all Airbus models.

The deal sheets tell you who owns what. They don’t tell you which doors are still open to a newcomer, or what each one costs.

Behind the break: the four ways into aerostructures now, ranked, and the one route that no longer exists. Everything above is public. The analysis below is what AirInsight subscribers pay for.