Boeing, Lockheed, Northrop, RTX (Raytheon), etc are essentially subsidiaries of the DoD, with privatized returns. They are too vital to the US military to be allowed to fail. Many countries like Russia and China have more overtly state-owned weapons manufacturers, whereas the U.S. pretends that theirs are legitimate free-market suppliers. When your business is deemed essentially to national security, and when the government signs trillion-dollar multi-decade contracts for equipment and maintenance, market forces no longer apply.