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
| 1&1 Internet AG (457) | 1a-Personalservice (46) |
| 1a-Personalservice "medical" (21) | 1a-Zeitarbeit GmbH (16) |
| 1st Solution Consulting GmbH (14) | 1st Solution Personal (33) |
| 1st Solution Personal GmbH (22) | 1stMOVER (5) |
| 24/7 United Billing GmbH (11) | 24-Job.net Bert Uhlig (18) |
| 360alpstv (5) | 3C Deutschland GmbH (5) |
| 3C GmbH (5) | 3D-Micromac AG (10) |
| 3Defacto Consulting GmbH (5) | 3M Deutschland GmbH (19) |
| 4C Group AG (22) | 4flow AG (37) |
| 4K Personalberatung GmbH & Co KG (140) | 4Mis GmbH (10) |
| 4plus GmbH (5) | 4S ServiceLogistics GmbH (21) |
| 4teamplay UG (haftungsbeschrankt) (8) | 4U @work GmbH (110) |
| 50Hertz Transmission GmbH (9) | 7(S) Engineering GmbH & Co. KG (97) |
| 7(S) Gastronomie GmbH (5) | 7(S) Office GmbH (96) |