Thailand's PTT Group—a major 1.8 quadrillion-baht energy conglomerate managing over 100 subsidiaries—is undergoing major C-suite turnover through late 2025. PTTEP has appointed Kunita Thanita Sasvathayu as new CEO starting October 2025; OR is recruiting a replacement for its outgoing CEO; GPSC's CEO retires in October 2025; and PTT Group's main CEO retires in April 2026. This succession cycle affects strategic direction and operational continuity across Thailand's energy and utility sectors.