Stearman Aircraft Corporation was an aircraft manufacturer in Wichita, Kansas. Although the company designed a range of other aircraft, it is most known for producing the Model 75, which is commonly known simply as the "Stearman" or "Boeing Stearman".
In September 1934, United was forced to separate its airline and aircraft manufacturing operations. At this time, Boeing became a separate business once again, and Stearman was made a subsidiary of it. Stearman officially ceased to operate as a brand at this point, but it was at this same time that the Stearman plant created its most successful and enduring product, the Model 75 "Kaydet". The Kaydet would become the primary trainer aircraft for the US military during World War II.
In 2005, Boeing sold the civil portion of the former Stearman operations to Onex, forming Spirit AeroSystems, although they have retained the military operations.