| Company | Type | Based in | Founded |
|---|---|---|---|
| Qlik | privately held company, business, enterprise, public company | King of Prussia | 1993 |
| Queens College | public educational institution of the United States, university | — | 1937 |
| Queens Public Library | library network, public library, library | — | 1896 |
| Quest Software | business | Aliso Viejo | 1987 |
| Quiznos | fast food restaurant chain, restaurant chain | Denver | 1981 |
| Quora | business, online community, enterprise, question-and-answer site, company | Mountain View | June 21, 2010 |
| QVC | television station, business, specialty channel | Düsseldorf | 1986 |