Group 1 - The article reports on share buybacks conducted by various companies on December 18, 2025, with Tencent Holdings leading in both the number of shares repurchased and the total amount spent [1] - Tencent Holdings repurchased 1.055 million shares for a total of 636 million yuan, representing 1.030% of its total share capital for the year [2] - Other notable companies involved in the buyback include Xiaomi Group, which repurchased 3.75 million shares for 151 million yuan, and China National Petroleum Corporation, which repurchased 254,000 shares for 116.38 million yuan [3] Group 2 - The total number of shares repurchased by companies varied significantly, with China National Petroleum Corporation having a cumulative buyback of 230 million shares, which is 0.190% of its total share capital [3] - Companies like IGG and VITASOY also participated, with IGG repurchasing 182,000 shares for 68.49 million yuan and VITASOY repurchasing 122,000 shares for 77.94 million yuan [3] - The buyback activity reflects a strategic move by these companies to enhance shareholder value and manage their capital structure effectively [1][2]