| Client name | City | Country |
|---|---|---|
| INEOS Geel | Geel | Belgium |
| Ineos Manufacturing Belgium NV | Antwerp | Belgium |
| Ineos N.V. | Zwijndrecht | Belgium |
| Ineos Styrolution Belgium NV | Antwerpen 4 | Belgium |
| Ingenierie Software Technologie | Port-Jérôme-sur-Seine | France |
| INOVYN Manufacturing Belgium NV | Belgium | |
| Institute de Regulation ed D'automation | Arles | France |
| Invensys Flow Control France SAS | Cergy Pontoise Cedex | France |
| Invensys Systems n. v. | Baarn | Netherlands |
| Invensys Systems N.V./S.A. | Aartselaar | Belgium |
| IQatalyst B.V. | De Meern | Netherlands |
| ITank B.V. | Rotterdam | Netherlands |
| ITC Rubis Terminal Antwerp NV | Beveren | Belgium |
| JD Mesure | La Seyne sur Mer | France |
| John Brown Eng. en Constr.B.V. | Zoetermeer | Netherlands |
| John Cockerill Energy | Seraing - Belgium | Belgium |
| John Zink KSS | Dudelange | Luxembourg |
| JVV Holding BVBA | Lint | Belgium |
| Kerr McGee Pigments N.V. | Antwerpen | Belgium |
| KH Engineering België N.V. | Antwerpen | Belgium |
| Koninklijk Belgisch Instituut voor Natuurwetenschappen | Brussels | Belgium |
| Lanxess Belgium NV | Kallo (Beveren) | Belgium |
| Lanxess Chemical B.V. | Rotterdam-Botlek | Netherlands |
| LANXESS Performance Materials NV | Antwerpen | Belgium |
| Ludan Engineering N.V. | Berchem | Belgium |
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