Sonasid (French: société nationale de sidérurgie) is a steel manufacturing company jointly owned by ArcelorMittal and the SNI, the holding company of king Mohammed VI. Founded as a state-owned company, SONASID was privatised in 1997 when it was taken over by the king's holding ONA group. In 2006 ArcelorMittal increased their participation in the company. Sonasid operates factories in Nador and Jorf Lasfar.