A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | 1
| u-blox AG (7) | UBS AG (75) |
| UBS Card Center AG (5) | UBS Financial Services (88) |
| UEFA (5) | Uhde Inventa-Fischer AG (35) |
| Uhde Inventa-Fischer GmbH (4) | Ultimativo Consulting GmbH (9) |
| Umeo (9) | Unic AG (6) |
| Unicada AG (4) | Uniklinik Balgrist (14) |
| Unilever Deutschland Holding GmbH (7) | Unique (Flughafen Zurich AG) (23) |
| unisg (4) | United BioSource Corporation (4) |
| Universal-Job AG (155) | Universal-Job AG, Aarau (20) |
| Universal-Job AG, Basel (21) | Universal-Job AG, Bern (10) |
| Universal-Job AG, Luzern (8) | Universal-Job AG Rapperswil (10) |
| Universal-Job AG, Solothurn (19) | Universal-Job AG Zurich (20) |
| Universitat Zurich (5) | Universitatsklinikum Freiburg (5) |
| Universitatsspital Basel (12) | UniversitatsSpital Zurich (47) |
| University Hospital Basel (44) | Uniwork AG (11) |
| upc cablecom GmbH (37) | Urs Ledermann & Partner AG, Bern (10) |