中鼎股份涨2.00%，成交额5.54亿元，主力资金净流入2609.23万元

Group 1 - The core viewpoint of the news is that Zhongding Co., Ltd. has shown significant stock performance, with a year-to-date increase of 81.42% and a recent trading volume indicating strong investor interest [1] - As of December 30, Zhongding's stock price reached 23.44 CNY per share, with a market capitalization of 30.859 billion CNY and a trading volume of 554 million CNY [1] - The company has experienced a net inflow of main funds amounting to 26.09 million CNY, with large orders contributing significantly to the trading activity [1] Group 2 - Zhongding Co., Ltd. specializes in the research, production, and sales of sealing components and special rubber products for various industries, including automotive and aerospace [2] - The company's main business revenue composition includes cooling systems (26.47%), intelligent chassis-rubber business (20.74%), sealing systems (19.72%), and other segments [2] - As of September 30, the company reported a revenue of 14.555 billion CNY for the first nine months of 2025, reflecting a year-on-year growth of 0.41%, while the net profit attributable to shareholders increased by 24.26% to 1.307 billion CNY [2] Group 3 - Zhongding Co., Ltd. has distributed a total of 2.738 billion CNY in dividends since its A-share listing, with 790 million CNY distributed in the last three years [3] - As of September 30, 2025, the company had 101,600 shareholders, with an average of 12,930 circulating shares per shareholder [2][3] - The second-largest circulating shareholder is Hong Kong Central Clearing Limited, holding 27.4606 million shares, while the Southern CSI 500 ETF has reduced its holdings [3]