Al Muhaidib is the chairman of Al Muhaidib Group, a Dammam, Saudi Arabia-based family-owned conglomerate. Al Muhaidib Group invests in companies across consumer products, infrastructure, construction, real estate, and finance; Sulaiman owns 28% of the company. The group was founded in 1943 by his father Abdulkadir, who started out as a food trader before expanding into building materials and real estate. Sulaiman and his brothers, Essam and Emad, took over after Abdulkadir's death in 1996; they share ownership of the group with four other family members. Al Muhaidib Group owns shares in at least 16 publicly traded companies in Saudi Arabia and Egypt.