| Company | Type | Based in | Founded |
|---|---|---|---|
| Quaker Oats Company | business, enterprise | Chicago | 1877 |
| Qualcomm | business, public company | San Diego | July 1985 |
| Qualtrics | business, public company | Provo | 2002 |
| Queens College | public educational institution of the United States, university | — | 1937 |
| Quest Software | business | Aliso Viejo | 1987 |
| Quiznos | fast food restaurant chain, restaurant chain | Denver | 1981 |
| QVC | television station, business, specialty channel | Düsseldorf | 1986 |