| H Mart | supermarket chain | Lyndhurst | 1982 |
| H. J. Heinz Company | food manufacturer, commercial organization | Pittsburgh | 1869 |
| Halo Studios | video game developer | Redmond | 2009 |
| Hanesbrands | business, public company | Winston-Salem | January 1, 2000 |
| Happy Madison Productions | television production company, film production company | Manchester, Los Angeles | December 10, 1999 |
| Harper | publishing house, imprint | New York City | 1817 |
| Harrah's Las Vegas | hotel | — | July 2, 1973 |
| Harvard Business School | business school, organization | Boston | 1908 |
| Harvard Divinity School | seminary | Cambridge | 1816 |
| Harvard University | colonial colleges, research university, private not-for-profit educational institution, private university | Cambridge | September 8, 1636 |
| Harvard University Press | book publisher, university press | Cambridge | 1913 |
| Harvey Mudd College | private not-for-profit educational institution, liberal arts college in the United States | Claremont | 1955 |
| Hasbro | board game publishing company, business, enterprise, public company | Pawtucket | 1923 |
| Haverford College | private not-for-profit educational institution, university | Haverford Township | 1833 |
| Hawaii Pacific University | private not-for-profit educational institution, university | — | 1965 |
| Hawaiian Airlines | airline, public company | Honolulu | January 30, 1929 |
| Hebrew Union College – Jewish Institute of Religion – Cincinnati | private not-for-profit educational institution, seminary | — | 1875 |
| Henry Ford Company | business, automobile manufacturer | Detroit | 1901 |
| Hercules Computer Technology | enterprise | California | 1982 |
| Herman Miller | business, public company | Zeeland | 1923 |
| Hess Corporation | holding company, business, gas station chain, enterprise, public company | New York City | 1919 |
| Hewlett Packard Enterprise | computer manufacturer, software company, business, enterprise | Spring | November 1, 2015 |
| Hewlett Packard Enterprise Services | business, enterprise | Plano | June 27, 1962 |
| Hewlett-Packard | computer manufacturer, software company, camera manufacturer, business, enterprise | Palo Alto | July 2, 1939 |
| HGST | business, enterprise | San Jose | 2003 |
| High Moon Studios | video game developer | San Diego | 2001 |
| Hilton Hotels & Resorts | hotel chain, organization | Texas | 1919 |
| Hilton Worldwide | multinational corporation, hotel chain, public company | McLean | 1919 |
| Hofstra University | private not-for-profit educational institution, private university | — | 1935 |
| Holland America Line | business, enterprise, cruise line | Seattle | 1873 |
| Hollywood Pantages Theatre | theatre building, movie theater, music venue | — | 1930 |
| Hollywood Pictures | film production company | Los Angeles | February 1, 1989 |
| Honeywell Aerospace | group of companies, business, subsidiary company, enterprise | Phoenix | 1936 |
| Hooters | restaurant chain | Atlanta | 1983 |
| Horizon Air | airline | Seattle | 1981 |
| Horseshoe Las Vegas | casino, hotel | — | December 5, 1973 |
| Hotels.com | dot-com company, travel website | — | 1991 |
| House of Blues | restaurant chain, business, chain | Los Angeles | November 26, 1992 |
| Houston Grand Opera | opera company | Houston | 1955 |
| Howard University | historically black college or university, private not-for-profit educational institution, school, private university | Washington, D.C. | March 2, 1867 |
| HowStuffWorks | podcast network, business | Atlanta | July 11, 1998 |
| HubSpot | business, software development | Cambridge | 2006 |
| Hudson Motor Car Company | business, automobile manufacturer | Detroit | 1909 |
| Hudson Theatre | Broadway theatre, theatre building, movie theater | — | October 19, 1903 |
| Hughes Aircraft Company | aerospace manufacturer | Culver City, Los Angeles | 1932 |
| Hughes Airwest | airline | San Francisco International Airport | 1968 |
| Hughes Helicopters | business, enterprise | Mesa, Culver City | 1947 |
| Hult International Business School | business school, educational institution | — | 1964 |
| Humana | business, enterprise, public company | Louisville | 1961 |
| Humble Bundle, Inc. | video game publisher, digital book and audiobook distribution platform, digital distribution platform | San Francisco | March 1, 2010 |
| Huntington Bancshares | bank, business, financial institution, public company | Columbus | 1866 |
| Huntsman Corporation | business, enterprise, public company | Salt Lake City | 1982 |
| Hupmobile | business, automobile manufacturer | Detroit | 1909 |
| Hurley International | business, subsidiary company | Costa Mesa | 1998 |
| Hyperloop One | business | Los Angeles | June 2014 |
| Häagen-Dazs | food manufacturer, food brand, trademark, ice cream parlor chain | Oakland | 1961 |