Core Viewpoint - Micron Optoelectronics (stock code: 920198) experienced a significant price increase of 30.00% on October 21, 2025, leading to its appearance on the trading leaderboard with a total transaction volume of 22.83 million shares and a transaction value of 282 million yuan [1][2]. Trading Activity Summary - The top buying seat was held by China Galaxy Securities Co., Ltd. with a purchase amount of approximately 10.45 million yuan [1][2]. - The top selling seat was held by CITIC Securities Co., Ltd. with a selling amount of approximately 14.72 million yuan [1][2]. - Total buying amounts from other notable securities firms included Dongguan Securities (approximately 8.54 million yuan), Everbright Securities (approximately 6.57 million yuan), and Yintai Securities (approximately 6.53 million yuan) [2].