东港股份涨2.27%，成交额2.74亿元，主力资金净流入129.85万元

Group 1 - The core viewpoint of the news is that Donggang Co., Ltd. has shown significant stock performance with a year-to-date increase of 25.89% and a recent surge of 11.85% over the last five trading days [1] - As of December 30, Donggang's stock price reached 14.44 yuan per share, with a total market capitalization of 7.563 billion yuan [1] - The company has seen a net inflow of main funds amounting to 1.2985 million yuan, with large orders contributing significantly to both buying and selling activities [1] Group 2 - Donggang Co., Ltd. operates in the light industry manufacturing sector, specifically in packaging and printing, with its main business revenue composition being 51.38% from printing products, 27.90% from composite products, and 18.99% from technical services [2] - As of December 19, the number of shareholders decreased by 11.17% to 30,600, while the average circulating shares per person increased by 12.57% to 17,083 shares [2] - For the period from January to September 2025, Donggang achieved an operating income of 867 million yuan, representing a year-on-year growth of 11.78%, and a net profit attributable to shareholders of 123 million yuan, reflecting a growth of 53.48% [2] Group 3 - Donggang Co., Ltd. has distributed a total of 2.03 billion yuan in dividends since its A-share listing, with 393 million yuan distributed over the past three years [3]