Al Nahdi founded and is vice chairman of Nahdi Medical, Saudi Arabia's largest chain of pharmacies. Nahdi Medical, which had $2.5 billion in 2024 revenue, went public on the Saudi stock exchange in 2022. Al Nahdi started the company by purchasing two pharmacies in Jeddah in 1986, a year after he graduated from university. The company has more than 1,181 pharmacies, mostly in Saudi Arabia and some in the U.A.E. Nahdi Medical has expanded into offering primary healthcare services through a number of health clinics.