Spirit Aero was once part of Boeing. It was sold to private equity some 20 years ago and sold shares in an initial public offering in 2006 at $26. Over the years, Spirit added revenue from Airbus, which Spirit AeroSystems paid to take over facilities. That gives investors some indication of how tough things have been for Spirit AeroSystems lately.

The UK Competition and Markets Authority said it will not open an in-depth probe into Boeing's deal to acquire Spirit AeroSystems, effectively clearing the $4.7B deal.

Officials said they wouldn’t open an in-depth probe into Boeing’s deal to acquire the fuselage maker, effectively clearing the transaction.