RIYADH — The Kremlin announced that Saudi Arabia will be the main guest of honor at the 29th St. Petersburg International Economic Forum (SPIEF) 2026, which runs from June 3 to June 6. This high-level participation coincides with the 100th anniversary of establishing diplomatic relations between Russia and Saudi Arabia. The Russian presidency confirmed that Saudi Energy Minister Prince Abdulaziz bin Salman will lead a high-level delegation compr…