中鼎股份跌2.02%，成交额4.65亿元，主力资金净流出4031.91万元

Group 1 - The core viewpoint of the news is that Zhongding Co., Ltd. has experienced significant stock price fluctuations and trading activity, with a year-to-date increase of 75.33% in stock price and notable trading volumes [1] - As of September 1, Zhongding's stock price was reported at 22.74 yuan per share, with a total market capitalization of 29.937 billion yuan [1] - The company has seen a net outflow of 40.3191 million yuan in principal funds, with large orders showing a buy of 90.9949 million yuan and a sell of 109 million yuan [1] Group 2 - Zhongding Co., Ltd. specializes in the research, production, and sales of sealing components and special rubber products across various industries, including automotive and aerospace [2] - The main business revenue composition includes cooling systems (26.47%), intelligent chassis-rubber business (20.74%), sealing systems (19.72%), and lightweight intelligent chassis (15.70%) [2] - As of June 30, the company reported a revenue of 9.846 billion yuan for the first half of 2025, reflecting a year-on-year growth of 1.83%, and a net profit of 817 million yuan, up 14.11% year-on-year [2] Group 3 - Zhongding Co., Ltd. has distributed a total of 2.672 billion yuan in dividends since its A-share listing, with 724 million yuan distributed in the last three years [3] - As of June 30, 2025, the top ten circulating shareholders included Hong Kong Central Clearing Limited, holding 24.7886 million shares, a decrease of 28.0887 million shares from the previous period [3]