Core Viewpoint - On October 15, 2025, Wantong Hydraulic (920839) experienced a significant stock price increase of 21.67%, leading to its appearance on the trading leaderboard with a total transaction volume of 9.2593 million shares and a transaction value of 505 million yuan [1][2]. Group 1: Trading Activity - The closing price of Wantong Hydraulic reached 58.9 yuan, marking a notable rise [1]. - The total trading volume for the day was 9.2593 million shares, with a total transaction value of 505 million yuan [1]. - The top buying seat was held by Huachuang Securities, which purchased shares worth approximately 29.43 million yuan [2]. - The top selling seat was held by Dongfang Caifu Securities, which sold shares worth approximately 24.73 million yuan [2]. Group 2: Institutional Participation - Various securities firms participated in the trading, with significant amounts bought and sold by institutional investors [2]. - The second largest buying activity was from Guoxin Securities, amounting to approximately 17.43 million yuan [2]. - Institutional investors were also active in both buying and selling, indicating a robust interest in the stock [2].