Group 1 - The article discusses the stock buybacks conducted by various companies on May 21, 2025, highlighting the total amounts and quantities repurchased [1][2] - Bilibili-W (09626) had the largest buyback amount, repurchasing 5.5881 million shares for a total of 783 million [1][2] - Other notable buybacks include Tencent Holdings (00700) with 963,000 shares repurchased for 500 million, and China COSCO Shipping Holdings (01919) with 5.57 million shares for 82.33 million [2][3] Group 2 - The cumulative buyback amounts for the year show Bilibili-W (09626) has repurchased a total of 839,200 shares, representing 0.203% of its total share capital [2] - China COSCO Shipping Holdings (01919) has the highest cumulative buyback percentage at 9.129%, with a total of 29.2 million shares repurchased [2] - Other companies with significant buyback percentages include AIA Group (01299) at 5.398% and Time Electric (03898) at 9.689% [2]