Salman bin Abdulaziz Al Saud is King of Saudi Arabia, reigning since 2015, and was also Prime Minister of Saudi Arabia from 2015 to 2022. The 25th son of King Abdulaziz, the founder of Saudi Arabia, he assumed the throne on 23 January 2015. Prior to his accession, he was Crown Prince of Saudi Arabia from 18 June 2012 to 23 January 2015. Salman is the third oldest living head of state, the oldest living monarch, and Saudi Arabia's first head of state born after the unification of Saudi Arabia. He has a reported personal wealth of at least $18 billion, which makes him the third wealthiest royal in the world and one of the wealthiest individuals in the world.