**Following the February 28, 2026, assassination of Supreme Leader Ayatollah Ali Khamenei in U.S.-Israeli strikes during the early phase of the ongoing conflict, Iran's Assembly of Experts selected his son Mojtaba Khamenei as successor in early March 2026.** This marked the first leadership transition since 1989, executed rapidly under wartime pressure via the constitutional process involving a temporary three-member council (President Masoud Pezeshkian, Judiciary Chief Gholam-Hossein Mohseni-Eje'i, and cleric Alireza Arafi) before the clerical vote. Mojtaba, a mid-ranking cleric with limited prior public office, has remained out of public view for six months amid reports of severe injuries sustained in the same attack that killed his father and other family members. Iranian officials maintain he retains ultimate authority from a secure location, delegating day-to-day functions to senior figures including IRGC commanders and cabinet members, while hardline elements have consolidated influence in military and security posts. The regime faces compounded pressures from the protracted war, economic strain, fuel shortages, and sporadic domestic protests, with ongoing diplomatic efforts focused on the Strait of Hormuz and potential negotiations. These dynamics, alongside questions over Mojtaba's effective capacity and any future health or stability developments, shape assessments of additional leadership shifts or institutional continuity.