| 1 | | Operaria | burgos |  ES | | | N/A | Ima | N/A | Wichita, Kansas, United States | Insurance | Wichita, Kansas, United States | +1 9139823650 |
| 2 | | Operaria | barcelona | ES | N/A | | N/A | The Dow Chemical Company | N/A | Midland, Michigan, United States | Chemicals | Midland, Michigan, United States | +1 5024495200 |
| 3 | | Operaria | barcelona | ES | N/A | | N/A | Denso | N/A | Japan | Automotive | N/A | +81 138737288 |
| 4 | | Operaria | madrid | ES | N/A | | N/A | John Deere | N/A | Moline, Illinois, United States | Machinery | N/A | +1 9197966112 |
| 5 | | Operaria | madrid | ES | N/A | | N/A | Repsol | N/A | Madrid, Madrid, Spain | Oil & Energy | N/A | +34 916302709 |
| 6 | | Operaria Laboratorio | N/A | ES | N/A | | N/A | Famar | N/A | Athens, Attiki, Greece | Pharmaceuticals | N/A | +30 2109898100 |
| 7 | | Operaria | barcelona | ES | N/A | | N/A | Alcon, A Novartis Company | N/A | Fort Worth, Texas, United States | Pharmaceuticals | Fort Worth, Texas, United States | N/A |
| 8 | | Operaria | barcelona | ES | N/A | | N/A | Mecaplast Group | N/A | Monaco, Monaco | Automotive | N/A | N/A |
| 9 | | Operaria | huesca | ES | N/A | | N/A | Baxter International Inc. | N/A | Deerfield, Illinois, United States | Pharmaceuticals | Deerfield, Illinois, United States | +1 6109337202 |
| 10 | | Multinacional Operaria | vilatenim | ES | N/A | | N/A | Nestlé | N/A | Vevey, Vaud, Switzerland | Banking | Vevey, Vaud, Switzerland | +41 219241111 |
| 11 | | Operaria | N/A | ES | N/A | | N/A | Crown Holdings, Inc. | N/A | Pennsylvania, United States | Packaging and Containers | N/A | +1 9136969881 |
| 12 | | Operaria | madrid | ES | | N/A | N/A | Initial | N/A | United Kingdom | Environmental Services | N/A | N/A |
| 13 | | Operaria | N/A | ES | | N/A | N/A | Embega | N/A | Villatuerta, Navarre, Spain | Accounting | Villatuerta, Navarre, Spain | +34 948548700 |
| 14 | | Operaria | pamplona | ES | | | N/A | Cinfa | N/A | Navarra, Navarre, Spain | Pharmaceuticals | Navarra, Navarre, Spain | +34 948335005 |
| 15 | | Operaria Especialista | madrid | ES | | N/A | N/A | Inditex | N/A | Arteixo, A Coruña, Spain | Package/Freight Delivery | N/A | +34 981185400 |
| 16 | | Operaria | pamplona | ES | | N/A | N/A | Idk Technologies | N/A | New Hampshire, United States | Online Media | N/A | N/A |
| 17 | | Operaria | barcelona | ES | | N/A | N/A | Smp Automotive Global | N/A | Germany | Automotive | N/A | N/A |
| 18 | | Operaria | madrid | ES | | N/A | N/A | Trw | N/A | Uberherrn, Saarland, Germany | Industrial Automation | N/A | +1 7032515500 |
| 19 | | Operaria | barcelona | ES | | N/A | N/A | Inem | N/A | Lisbon, Lisbon, Portugal | Fine Art | N/A | +351 222065000 |
| 20 | | Operaria Produccion Downstream | pamplona | ES | | N/A | N/A | 3P Biopharmaceuticals | N/A | Noain, Navarra, Spain | Research | N/A | N/A |