| 1 | | Operaria | madrid |  ES | | | N/A | John Deere | N/A | Moline, Illinois, United States | Machinery | N/A | +1 9197966112 |
| 2 | | Operaria | madrid | ES | N/A | | N/A | Iveco | N/A | Turin, Piedmont, Italy | Automotive | N/A | +39 457236866 |
| 3 | | Operaria | huesca | ES | N/A | | N/A | Baxter International Inc. | N/A | Deerfield, Illinois, United States | Pharmaceuticals | Deerfield, Illinois, United States | +1 6109337202 |
| 4 | | Operaria De Limpieza | barcelona | ES | N/A | | N/A | Acciona | N/A | Comunidad De Madrid, Madrid, Spain | Arts and Crafts | N/A | +34 900866002 |
| 5 | | Operaria | barcelona | ES | N/A | | N/A | The Dow Chemical Company | N/A | Midland, Michigan, United States | Chemicals | Midland, Michigan, United States | +1 5024495200 |
| 6 | | Operaria | fuenlabrada | ES | N/A | | N/A | Psa Peugeot Citroën | N/A | Paris, Île-De-France, France | Automotive | N/A | N/A |
| 7 | | Operaria Laboratorio | N/A | ES | N/A | | N/A | Famar | N/A | Athens, Attiki, Greece | Pharmaceuticals | N/A | +30 2109898100 |
| 8 | | Operaria | pamplona | ES | | | N/A | Cinfa | N/A | Navarra, Navarre, Spain | Pharmaceuticals | Navarra, Navarre, Spain | +34 948335005 |
| 9 | | Operaria | bilbao | ES | | N/A | N/A | Atento España | N/A | Madrid, Madrid, Spain | Outsourcing/Offshoring | N/A | N/A |
| 10 | | Operaria | sabadell | ES | | N/A | N/A | Noel Alimentaria S.A.U. | N/A | Sant Joan Les Fonts, Catalonia, Spain | Food Production | N/A | N/A |
| 11 | | Operaria | barcelona | ES | | N/A | N/A | Denso Europe B.V. | N/A | Netherlands | Automotive | N/A | +31 294493493 |
| 12 | | Operaria | madrid | ES | | N/A | N/A | Sanofi | N/A | France, Aquitaine, France | Health, Wellness and Fitness | N/A | +33 499777879 |
| 13 | | Operaria | gijon | ES | | N/A | N/A | Tecsolpar S.A. | N/A | Llanera, Asturias, Spain | Chemicals | N/A | N/A |
| 14 | | Operaria Especialista | barcelona | ES | | N/A | N/A | B. Braun Medical Ltd. Uk | N/A | South Yorkshire, Rotherham, United Kingdom | Telecommunications | N/A | N/A |
| 15 | | Operaria | barcelona | ES | | | N/A | Frit Ravich | N/A | Maçanet De La Selva, Catalonia, Spain | Food Production | Maçanet De La Selva, Catalonia, Spain | +34 677607520 |
| 16 | | Operaria | pamplona | ES | | | N/A | Cinfa | N/A | Navarra, Navarre, Spain | Pharmaceuticals | Navarra, Navarre, Spain | +34 948335005 |
| 17 | | Operaria | barcelona | ES | | N/A | N/A | Akua | N/A | Woodside, California, United States | Consumer Electronics | Woodside, California, United States | +1 3052354532 |
| 18 | | Operaria | valladolid | ES | | N/A | N/A | Seda Solubles Sl | N/A | N/A | Food Production | N/A | N/A |
| 19 | | Operaria | santa cruz de tenerife | ES | | N/A | N/A | Servicio Canario De Salud | N/A | Spain | Hospital & Health Care | N/A | +34 922951969 |
| 20 | | Operaria | barcelona | ES | | N/A | N/A | Seat, S.A. | N/A | Martorell, Catalonia, Spain | Industrial Automation | N/A | +34 973480860 |