| Sr# | Company | Standard | Certificate Number |
| 551 | Riyad Chemicals Factory | ISO 9001:2008 | 100CN156121912 |
| 550 | Kawther Sweet Water Contracting Company | ISO 9001:2008 | 100CN156161924 |
| 549 | Kawther Sweet Water Contracting Company | ISO 9001:2008 | 100CN156161924 |
| 548 | Haif Ready Mix Concrete, Jazan | ISO 18001:2007 | 300CN150731916 |
| 547 | Haif Ready Mix Concrete, Jazan | ISO 14001:2004 | 500CN150641910 |