| Las Vegas Sands | Las Vegas, Paradise | 1937 |
| Laureate Education | Baltimore, Miami | 1998 |
| Lazard | New York City | July 12, 1848 |
| Lear Corporation | Southfield | 1917 |
| Lehman Brothers | New York City | 1850 |
| Lemonade | New York City | 2015 |
| Levi Strauss & Co. | San Francisco, Levi's Plaza | 1853 |
| Liberty Media | Douglas County, Colorado | 1991 |
| Lincoln Motor Company | Dearborn | 1917 |
| Lockheed Martin | Bethesda | 1995 |
| Loews Corporation | New York City | 1946 |
| Logitech | Lausanne, Newark | October 2, 1981 |
| M&T Bank | Buffalo | 1856 |
| Marriott International | Bethesda | October 8, 1993 |
| Mastercard | Purchase | 1966 |
| Match Group | Kerrville | 2009 |
| Matson, Inc. | Honolulu | 1882 |
| MCA Inc. | Chicago | November 10, 1958 |
| Mead Johnson | Glenview | 1905 |
| Mentor Graphics | Wilsonville | 1981 |
| Merck & Co. | Rahway | 1891 |
| Meredith Corporation | Des Moines | 1902 |
| Meritor | Troy | 1997 |
| Meta Platforms | Menlo Park | July 29, 2004 |
| MetLife | New York City | March 24, 1868 |
| Micron Technology | Boise | October 1978 |
| Moderna | Cambridge | 2010 |
| Monsanto | St. Louis, Creve Coeur | 1901 |
| Morgan Stanley | New York City | 1931 |
| Motorola Solutions | Chicago | January 4, 2011 |
| MSA Safety | Pittsburgh, Cranberry Township | 1914 |
| MSCI | New York City | 1969 |
| National Instruments | Austin | 1976 |
| NCR Corporation | Atlanta, Augsburg | 1884 |
| NetApp | Sunnyvale | 1992 |
| Netflix, Inc. | Los Gatos | August 29, 1997 |
| NetSuite | Austin | 1998 |
| Nike | Beaverton | January 25, 1964 |
| Nordstrom | Seattle | 1901 |
| Northrop Grumman Corporation | Falls Church | 1994 |
| Norwegian Cruise Line | Miami-Dade County | 1966 |
| Nu Skin Enterprises | Provo | 1984 |
| Nucor | Charlotte | September 1955 |
| O'Reilly Auto Parts | Springfield | 1957 |
| Occidental Petroleum | Houston | 1920 |
| Office Depot | Boca Raton | 1986 |
| Olin Corporation | Clayton | 1892 |
| Orbital Sciences Corporation | Dulles | 1982 |