Decrease in Shares Owned by Largest Shareholder of KB Financial Group Inc.

KB Financial Group Inc. reported a decrease in the number of shares owned by its largest shareholder, the Korean National Pension Service. As of September 30, 2025, the National Pension Service held 31,601,545 shares of common stock, representing 8.28% of the total shares. This is a decrease from 31,844,527 shares, representing 8.35% of the total shares, as of August 18, 2025. The total number of shares outstanding as of September 30, 2025, was 381,462,103. The report was filed on October 21, 2025, and signed by Sang Rok Na, Managing Director and Chief Financial Officer.