Shah Rahim al-Hussaini (Persian: رحیم الحسینی; born 12 October 1971), known as the Aga Khan V (Persian: آقاخان پنجم, romanized: Āqā Khān Panjum), is a religious leader, philanthropist (through the Aga Khan Development Network), and businessman. He is the 50th hereditary Imam of the Shia Nizari Isma'ili Muslims, a branch of Islam. He is the descendant from Muhammad through his daughter, Fatima, and his cousin and son-in-law, Ali. The Qasimi Nizari Ismailis maintain that they are the only Shi‘i group today led by a living, present, hereditary Imam.
He is the second of four children of Shah Karim al-Husseini, who went by the title Aga Khan IV, and succeeded as the Nizari Imam following his father's death on 4 February 2025. He is the fifth person in the family to hold the title Aga Khan. Upon assuming the Imamate, he inherited his father's estate, which had been valued at over US$13.3 billion by Vanity Fair in 2013.