| Aeronca | aerospace manufacturer | Cincinnati, Middletown | 1928 |
| Boeing | rail vehicle manufacturer, public company, aerospace manufacturer | Chicago | 1934 |
| Boeing Rotorcraft Systems | aerospace manufacturer | United States | 1960 |
| Brewster Aeronautical Corporation | aerospace manufacturer | — | 1932 |
| Collins Aerospace | defense contractor, aerospace manufacturer | Charlotte | 2018 |
| Enstrom Helicopter Corporation | business | Menominee | 1959 |
| Firefly Aerospace | launch service provider, business | Cedar Park | 2014 |
| GE Aerospace | business, aerospace manufacturer | Evendale | April 15, 1892 |
| General Atomics | business, enterprise | San Diego | 1955 |
| General Dynamics | business, public company | Reston | February 21, 1952 |
| Glenn L. Martin Company | aerospace manufacturer | Baltimore | 1912 |
| Honeywell Aerospace | group of companies, business, subsidiary company, enterprise | Phoenix | 1936 |
| Hughes Aircraft Company | aerospace manufacturer | Culver City, Los Angeles | 1932 |
| Hughes Helicopters | business, enterprise | Mesa, Culver City | 1947 |
| Kaman Corporation | public company, aerospace manufacturer | Bloomfield, Connecticut | 1945 |
| Litton Industries | business, enterprise | Milwaukee | 1953 |
| McDonnell Aircraft Corporation | aerospace manufacturer | St. Louis | July 6, 1939 |
| McDonnell Douglas | former entity, defense contractor, aerospace manufacturer | St. Louis | 1967 |
| Moon Express | privately held company | Mountain View | 2010 |
| Northrop | business, aerospace manufacturer | Hawthorne | 1939 |
| Northrop Grumman Corporation | defense contractor, public company, aerospace manufacturer | Falls Church | 1994 |
| Orbital ATK | launch service provider, former entity, defense contractor, aerospace manufacturer | Dulles | February 9, 2015 |
| Piasecki Helicopter Corporation | former entity, aerospace manufacturer | Philadelphia | 1940 |
| Pratt & Whitney Rocketdyne | business, subsidiary company | Canoga Park | 2005 |
| Rocket Lab | launch service provider, aerospace manufacturer | Long Beach | June 29, 2006 |
| Rockwell International | conglomerate, public company | United States | February 1973 |
| RTX | defense contractor, business, public company | Arlington County | April 3, 2020 |
| Ryan Aeronautical | business | San Diego | 1934 |
| Sierra Nevada Corporation | business | Sparks | 1963 |
| SpinLaunch | launch service provider, space company | Long Beach | October 28, 2014 |
| Swift Engineering | business, enterprise, aerospace manufacturer | San Clemente | 1983 |
| Thiokol | business, defunct organization | Trenton, Brigham City | 1929 |
| Waco | business | Troy | 1919 |