| Imation | Oakdale | 1996 |
| Incyte | Wilmington | 2001 |
| Indian Motorcycle | Kings Mountain, Medina | 1901 |
| Instituto para la Información Científica | Filadelfia | 1960 |
| International Paper | Boston, Memphis | 1898 |
| Interpublic Group of Companies | Nueva York | 1961 |
| Intuit | Mountain View | 1983 |
| Invesco | Atlanta | 1935 |
| Invicta Fighting Championships | Enka | 2012 |
| IRobot | Bedford | 1990 |
| J. G. Brill Company | Filadelfia | 1868 |
| J. Walter Thompson | Nueva York | 1864 |
| Jabil Circuit | San Petersburgo | 1966 |
| Jeep | Toledo | 1941 |
| JP Morgan Chase | Nueva York | 1968 |
| Kaplan International Languages | Londres | 1967 |
| Kellanova | Chicago | 19 de febrero de 1906 |
| Kingston Technology | Fountain Valley | 1987 |
| Kmart | Detroit | 1962 |
| Knight's Armament Company | Titusville | 1983 |
| Koch, Inc. | Wichita | 1940 |
| Kohler | Kohler | 6 de diciembre de 1873 |
| Konecranes | Hyvinkää | 1994 |
| Kraft Heinz | Pittsburgh | 2015 |
| Landmark Education | San Francisco | 1991 |
| Learjet | Wichita | 1962 |
| LeCroy Corporation | Chestnut Ridge | 1964 |
| Leidos | Reston | 1969 |
| Level 3 Communications | Fráncfort del Meno | 1985 |
| Lexmark | Lexington | 27 de marzo de 1991 |
| Liberty Mutual | Boston | 1912 |
| Lionbridge | Waltham | 1996 |
| Lucasfilm Animation | San Francisco | 12 de mayo de 2003 |
| Lycos | Waltham | 1994 |
| Lyft | San Francisco | 2013 |
| Mack Trucks | Allentown, Greensboro | 1900 |
| Malwarebytes | Santa Clara | 21 de enero de 2008 |
| Marathon Oil | Houston | 1887 |
| Marriott International | Bethesda | 8 de octubre de 1993 |
| Martin Marietta | Bethesda | 1961 |
| Marvell Technology | Santa Clara | 1995 |
| Massey Ferguson | Duluth | 1953 |
| McGraw-Hill Education | Nueva York | 1888 |
| Mead Johnson | Glenview | 1905 |
| Mentor Graphics | Wilsonville | 1981 |
| Merrill | Nueva York | 6 de enero de 1914 |
| Modulus Graphite | Richmond | 1978 |
| Molson Coors Brewing Company | Chicago, Montreal | 2005 |