Boeing's Spirit takeover costs rise $455
Boeing's acquisition of Spirit AeroSystems is proving $455 million more expensive than initially estimated, raising the total burden of inherited customer
Boeing's takeover of key supplier Spirit AeroSystems is proving more expensive than the company first calculated. According to a Boeing filing examined in a September 3, 2026, Wall Street Journal report, customer deals inherited from Spirit will cost an additional $455 million, bringing the total estimated burden to $1.52 billion.
This figure is roughly 43% higher than Boeing's estimate at the end of December 2025, shortly after the acquisition closed. The company stated that its initial assessment understated the financial burden of fulfilling agreements Spirit had already signed with other customers. Boeing has not identified which specific customers or aircraft programs are responsible for the cost increase and says its assessment remains preliminary.
Financial impact and delivery figures
The additional costs emerge as Boeing increases its overall aircraft deliveries. Figures released on September 8, 2026, showed the company delivered 418 aircraft through August 2026, compared to 385 in the same period a year earlier. However, August deliveries dipped slightly.
| Month | 2026 Deliveries | 2025 Deliveries (Previous Year) |
|---|---|---|
| Through August | 418 | 385 |
| August only | 51 | 53 (July 2026) |
The report noted that handovers of 787 Dreamliners fell from 10 in July to just four in August.
Broader business and defense operations
Spirit AeroSystems' operations extended far beyond its work for Boeing. As part of the supplier's breakup, Airbus took over operations tied to its own aircraft when the transactions closed in December 2025. Other manufacturers continue to rely on the businesses Boeing acquired.
Spirit Defense, for instance, supplies structures for Northrop Grumman's B-21 Raider bomber and Sikorsky's CH-53K King Stallion helicopter. The supplier's broader historical customer base has also included business jet manufacturer Bombardier and engine maker Rolls-Royce.
Leadership comments on acquisition costs
The new cost finding follows an earlier warning from Boeing's leadership about the expense of integrating Spirit. On March 17, 2026, Chief Financial Officer Jay Malave said higher-than-expected costs had pushed the commercial-airplane division's expected return to profitability into 2027, a year later than previously anticipated.
Malave addressed the issue at a Bank of America investor conference. "You don't get access to all the information until you actually close" the deal, he said, according to the Journal's coverage. He described the financial effect as a short-term headwind.
Boeing completed the approximately $8.4 billion takeover of Spirit on December 8, 2025. The move brought 737 fuselage production and major structures for the 767, 777, and 787 programs under Boeing's direct control. Approximately 15,000 Spirit employees joined Boeing through the transaction.
At the time of the purchase, Boeing stated the acquisition would help improve quality and stabilize production by uniting the manufacturer with a critical supplier under single management. Spirit's defense business retained independent operations and governance to continue serving its other customers.
