Spirit AeroSystems Brand Guidelines: Boeing Wichita Sold in 2005, Bought Back in 2025

A bomber plant on the prairie, sold off by its owner.

Spirit AeroSystems was born of a sale. In June 2005, English Wikipedia says, Boeing sold its factory in Wichita, Kansas, together with plants at Tulsa and McAlester in Oklahoma, to the Canadian investment firm Onex Corporation. The new company began as Mid-Western Aircraft Systems and was renamed Spirit AeroSystems a few months later. The sale was part of a wider Boeing effort to shed assets and raise returns.

The Wichita works had a long history before that. English Wikipedia says it began as Stearman Aircraft in 1927, passed to the United Aircraft and Transport Corporation in 1929, stayed with Boeing when that group was broken up in 1934 and became the Wichita division of the Boeing Airplane Company in 1941. During the Second World War and after, the division built strategic bombers including the B-29 Superfortress, the B-47 Stratojet and the B-52 Stratofortress; later it turned to airliner structures, and English Wikipedia says the site builds about 70% of the structure of the Boeing 737.

The Oklahoma plants came from other companies that Boeing had absorbed. Tulsa opened as a Douglas Aircraft bomber plant in the Second World War and later built wings and parts for Boeing; McAlester opened in 1964 for North American Aviation. Boeing took control of both in 1996 through its mergers, and in 2020 Spirit announced it would close McAlester and move the work to Tulsa and Wichita.

Fuselages for Boeing, wings for Airbus.

Under Onex, Spirit’s task was to win work beyond Boeing. In 2006 it bought the aerostructures business of BAE Systems at Prestwick in Scotland and Samlesbury in England, a supplier mainly to Airbus; the deal completed on 1 April 2006, English Wikipedia says. Spirit floated on the New York Stock Exchange in November 2006, opened a plant at Subang in Malaysia in 2009 and, on 1 July 2010, a composites factory at Kinston, North Carolina, to build sections of the Airbus A350, which were finished at its plant in Saint-Nazaire, France. Onex sold its last shares in 2014.

The company grew again in 2019 and 2020. It agreed to buy Bombardier’s aerostructures and aftermarket operations in Belfast, the former Short Brothers plant, and in Casablanca, Morocco; the purchase completed in October 2020 and brought wings and mid-fuselage sections for the Airbus A220. It also bought Fiber Materials, a maker of high-temperature composites, and in 2021 Applied Aerodynamics, a repair and overhaul shop in Dallas.

Its core work stayed with Boeing. English Wikipedia says its main products are metal and composite aerostructures: the 737 fuselage, the nose and forward-cabin sections of most Boeing jetliners, fuselage sections for the 787 and the fuselage of the Sikorsky CH-53K helicopter. Boeing’s own description of what it acquired lists 737 fuselages, major structures for the 767, 777 and 787 Dreamliner, and fuselages for the P-8 and KC-46.

How aerospace suppliers present themselves.

Aerospace suppliers sell to a small number of buyers, and their imagery is built for engineers, airlines and investors rather than for passengers. The product is usually hidden inside someone else’s aircraft, so the pictures tend to show it before it disappears: an engine bolted to a test stand, a single fan blade lit in a studio, a fuselage section on a factory floor, or a cutaway drawing that opens up the layers of a turbofan or a landing-gear leg.

Factories are part of the story. Clean rooms, composite lay-up tables and long assembly halls appear again and again, often with people in them: apprentices, engineers and technicians in overalls, shown at work rather than posing. Many of these companies are joint ventures, partners or subcontractors on the same programmes, so a single engine or wing can carry the work of several firms, each telling its own part of it.

The trade has its own stages. The Paris Air Show at Le Bourget and the Farnborough show in England alternate year by year, and suppliers take chalets and stands there alongside the aircraft makers they serve. Services after delivery are a large part of the business too, and the language of aftermarket support, spare parts and maintenance, repair and overhaul (MRO) runs through their websites and reports.

Corporate reports often put an aircraft on the cover, even when the company makes none of it. Behind that shared look sit very different histories: century-old engine makers, plants sold off by aircraft builders, conglomerate spin-outs and private-equity buyouts. The guides in this series set out what can be checked about each one, and mark clearly what rests on the company’s own word.

Back inside Boeing, with a separate defence arm.

Boeing began talks to buy Spirit back in January 2024, English Wikipedia says, after years of losses and quality-control problems at the supplier. The return was announced on 1 July 2024, when Boeing said it had signed a definitive agreement to acquire Spirit in an all-stock deal. Boeing said that bringing Spirit back in-house would let it align its production, safety and quality management systems across both companies. Under an agreement announced in April 2025, English Wikipedia says, Spirit also passed the sites and assets tied to Airbus programmes directly to Airbus, which completed that transfer on 8 December 2025; they included Kinston, Saint-Nazaire and Casablanca and parts of the Prestwick and Belfast work. Before the deal closed, Spirit sold Fiber Materials and its sites in Biddeford, Maine, and Woonsocket, Rhode Island, to Tex-Tech Industries in January 2025.

The deal closed on 8 December 2025, when Boeing announced that it had completed its acquisition. Spirit’s commercial and aftermarket operations in Wichita, Dallas and Tulsa, and its Aerospace Innovation Center at Prestwick, began to be integrated into Boeing, with about 15,000 people across the five sites, Boeing said. Part of the Belfast operation was taken over by Boeing to run as an independent subsidiary branded Short Brothers, a Boeing Company, Boeing said the deal also brought its largest supplier of spare parts in-house and added Spirit’s repair and overhaul businesses to its own services, and Spirit’s defence work continues as Spirit Defense, an independent supplier that reports into Boeing Defense, Space & Security while keeping its own governance.

Spirit AeroSystems therefore no longer trades as an independent listed company. Its name survives in Spirit Defense, while the Wichita plant it was built around is again part of Boeing, twenty years after the sale.

For a design guide, Spirit AeroSystems shows how a supplier formed by a sale can build a name of its own and then hand most of it back to the buyer’s customer. Compare Boeing, which sold the plant and bought it back, and Airbus, which agreed in 2025 to take over its Airbus work. For this guide we use a slate blue, a fuselage grey and a rust with a sans, an unofficial interpretation; no product or logo is reproduced.

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