欧科亿跌2.08%，成交额3665.98万元，主力资金净流出676.52万元

Group 1 - The core viewpoint of the news is that 欧科亿's stock has experienced fluctuations, with a recent decline of 2.08% and a current price of 30.53 yuan per share, while the company has seen a significant increase in stock price of 70.55% year-to-date [1] - As of December 25, the company had a total market capitalization of 4.848 billion yuan, with a trading volume of 36.66 million yuan and a turnover rate of 0.75% [1] - The main business of 欧科亿 includes the research, production, and sales of CNC tool products and hard alloy products, with revenue composition being 50.72% from CNC tools, 46.91% from hard alloy products, and 1.49% from other supplementary products [1] Group 2 - As of September 30, the number of shareholders for 欧科亿 was 7,667, an increase of 13.48% from the previous period, while the average circulating shares per person decreased by 11.88% to 20,709 shares [2] - For the period from January to September 2025, 欧科亿 reported operating revenue of 1.023 billion yuan, representing a year-on-year growth of 14.34%, but the net profit attributable to shareholders decreased by 43.09% to 51.126 million yuan [2] - 欧科亿 has distributed a total of 261 million yuan in dividends since its A-share listing, with 158 million yuan distributed over the past three years [3]