| Glu Mobile | video game publisher, video game developer, business, enterprise, public company | San Francisco | 2005 |
| GNC | business, enterprise, public company | Pittsburgh | 1935 |
| Godiva Chocolatier | chocolaterie | New York City | 1926 |
| GoJet Airlines LLC | airline | Bridgeton | 2004 |
| Gonzaga University | Jesuit university, private not-for-profit educational institution | Spokane | 1887 |
| Google | technology company, online service, business, identity provider, public company | Mountain View, Googleplex | September 4, 1998 |
| Google Fiber | network service provider | — | February 10, 2010 |
| Goose Island Brewery | brewery | Chicago | 1988 |
| GoPro | trademark, business, public company | San Mateo | 2002 |
| GoTo | software company, enterprise, public company | Boston | 2003 |
| Governors State University | public educational institution of the United States, university | — | 1969 |
| Gracie Films | television production company, film production company | Culver City | 1987 |
| Graflex | business | Rochester | 1889 |
| Graham-Paige | business, automobile manufacturer | Evansville | 1927 |
| Grambling State University | historically black college or university, public educational institution of the United States, university | Grambling | 1901 |
| Gramercy Pictures | film production company, film distributor | Universal City, Los Angeles | 2015 |
| Grauman's Chinese Theatre | movie theater | — | May 18, 1927 |
| Greenwood Publishing Group | book publisher | Santa Barbara | 1967 |
| Grinnell College | liberal arts college, private not-for-profit educational institution, school, organization | — | 1846 |
| Griptonite Games | video game developer | Kirkland | 1994 |
| Grubhub | food delivery, online service, business, subsidiary company, enterprise | Chicago | 2004 |
| GTE | business, enterprise | Stamford | 1918 |
| Guardian Industries | business | Auburn Hills | 1932 |
| Gulf and Western Industries | conglomerate | New York City | 1934 |
| H Mart | supermarket chain | Lyndhurst | 1982 |
| H. J. Heinz Company | food manufacturer, commercial organization | Pittsburgh | 1869 |
| Hachette Book Group | book publisher, publishing house | New York City | 1837 |
| Hachette Books | book publisher, publishing house | New York City | 1990 |
| Haidilao | restaurant chain, business, company, public company | Century City, Chicago | March 20, 1994 |
| Halo Studios | video game developer | Redmond | 2009 |
| Hampshire College | liberal arts college, Colleges That Change Lives, private not-for-profit educational institution | — | 1965 |
| Handspring | business | Mountain View | June 1998 |
| Harcourt | publishing house | San Diego, New York City | 1919 |
| Hard Rock Hotel and Casino | skyscraper, casino, hotel, music venue | — | 1995 |
| Harley-Davidson | motorcycle manufacturer | Milwaukee | 1903 |
| Harman International Industries | business, enterprise, public company | Stamford | 1980 |
| Harper | publishing house, imprint | New York City | 1817 |
| Harris Corporation | former entity, business, public company | Melbourne | 1955 |
| Harry S. Truman Presidential Library and Museum | museum, library | — | 1957 |
| Harvard Graduate School of Design | graduate school, academic department | Cambridge | 1936 |
| Harvard University | colonial colleges, research university, private not-for-profit educational institution, private university | Cambridge | September 8, 1636 |
| 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 |
| Haskell Indian Nations University | American Indian boarding school, public educational institution of the United States, university, land-grant university, tribal colleges and universities | — | 1884 |
| HEAD | business, enterprise | Kennelbach | 1950 |
| Henry Holt and Company | book publisher, publishing house | New York City | 1866 |
| Herbalife | multi-level marketing company, public company | Cayman Islands, Los Angeles, California | February 1980 |
| Hercules Computer Technology | enterprise | California | 1982 |