正丹股份涨2.32%，成交额6974.13万元，主力资金净流入310.13万元

Group 1 - The core viewpoint of the news is that Zhengdan Co., Ltd. has experienced fluctuations in its stock price and financial performance, with a recent increase in stock price but a decline in revenue and profit year-on-year [1][2]. Group 2 - As of January 5, Zhengdan's stock price increased by 2.32% to 18.06 CNY per share, with a total market capitalization of 9.62 billion CNY [1]. - The company reported a revenue of 1.895 billion CNY for the first nine months of 2025, a year-on-year decrease of 27.02%, and a net profit of 675 million CNY, down 18.18% year-on-year [2]. - Zhengdan's main business revenue composition includes 89.59% from anhydrides and esters, 10.40% from high-boiling aromatic solvents, and 0.01% from other sources [1]. - The company has distributed a total of 713 million CNY in dividends since its A-share listing, with 561 million CNY distributed in the last three years [3]. - As of September 30, 2025, the number of shareholders decreased by 10.71% to 48,000, while the average circulating shares per person increased by 11.99% to 11,103 shares [2][3].