（记者 王晓波） 每经AI快讯，有投资者在投资者互动平台提问：公司特高压电容膜属国家战略新材料，请问研发投入 中用于特高压 / 航天级电容膜的占比多少？是否有相关专利（如耐辐射 / 宽温配方）？ 大东南（002263.SZ）1月7日在投资者互动平台表示，公司子公司宁波万象研发投入中用于特高压研发 投入占30%~50%，有相关特高压产品专利。 ...

Group 1 - The company, Dazhongnan (002263.SZ), has indicated the potential to supply capacitor films for the aerospace sector in the future [1]

格隆汇1月7日丨大东南(002263.SZ)在投资者互动平台表示，特高压电容膜市场是公司重点关注的市场 之一。公司将持续深耕，加大研发及销售投入。 ...

Group 1 - The core viewpoint of the article is that the prosperity of the new energy vehicle industry will promote the entire capacitor film industry [1] - The company's capacitor film products can be used in new energy vehicles [1]

证券日报网讯 1月6日，大东南在互动平台回答投资者提问时表示，公司大股东公开征集转让股份事项 以公司后续公告为准。 （文章来源：证券日报） ...

证券日报网讯1月6日，大东南（002263）在互动平台回答投资者提问时表示，截至2025年12月31日公司 股东人数为108335户。 ...

Core Viewpoint - The continuous decline in the number of shareholders for many companies indicates a trend of increasing concentration of shares, with 106 companies experiencing a decrease for more than three consecutive periods, and some seeing declines for up to 12 periods [1][2]. Group 1: Shareholder Trends - A total of 541 companies reported their latest shareholder numbers as of December 31, with 106 companies showing a continuous decline in shareholder numbers for over three periods [1]. - Notable companies with significant declines include Zhukebo Design, which has seen a 28.08% drop in shareholder numbers over 12 periods, and Dazhongnan, with a 28.54% decline over 11 periods [1]. - Companies with the largest recent declines in shareholder numbers include *ST Shengxun, Huari Co., and Xingfa Group, with decreases of 11.26%, 8.70%, and 7.35% respectively [1][3]. Group 2: Market Performance - Among the companies with declining shareholder numbers, 32 have seen their stock prices rise, while 74 have experienced declines, with notable gainers including Zhiguang Electric, Zhejiang Meida, and Shenhuo Co., which increased by 43.50%, 21.97%, and 19.59% respectively [2]. - 20 companies outperformed the Shanghai Composite Index during this period, with Zhiguang Electric, Zhejiang Meida, and Shenhuo Co. achieving excess returns of 38.48%, 16.28%, and 15.71% respectively [2]. Group 3: Industry and Institutional Insights - The industries with the highest concentration of companies experiencing declining shareholder numbers include basic chemicals, pharmaceuticals, and machinery, with 17, 9, and 9 companies respectively [2]. - In terms of market segments, 65 companies are listed on the main board, 40 on the ChiNext board, and 1 on the Sci-Tech Innovation board [2]. - In the past month, 15 companies with declining shareholder numbers have been subject to institutional research, with Zhiguang Electric, Shenzhen Huqiang, and Jushen Co. being the most frequently researched, each receiving two institutional visits [2].

（文章来源：证券日报） 证券日报网讯 12月26日，大东南在互动平台回答投资者提问时表示，如涉及应披露事项，公司将按照 规定履行信披义务，相关事项请以公司在指定信息披露媒体上披露的信息为准。 ...

Group 1 - The article highlights that 835 companies reported their latest shareholder numbers as of December 20, with 180 companies experiencing a continuous decline in shareholder numbers for more than three periods, indicating a trend of increasing concentration of shares [1][2] - Notable companies with significant declines in shareholder numbers include Yihau New Materials, which has seen a 37.94% decrease over 12 periods, and Zhukebo Design, with a 27.40% decrease over 11 periods [1][2] - The companies with the largest recent declines in shareholder numbers include Hewei Electric, Guoji Precision, and Dalian Heavy Industry, with decreases of 15.15%, 13.33%, and 11.90% respectively [1][2] Group 2 - Among the companies with declining shareholder numbers, 44 have seen their stock prices rise, while 135 have experienced declines, with notable gainers including Shibu Detection, Guoji Precision, and Quanyin High-Tech, which increased by 60.21%, 57.31%, and 29.84% respectively [2] - The sectors with the highest concentration of companies experiencing declining shareholder numbers include basic chemicals, machinery equipment, and pharmaceutical biology, with 24, 20, and 18 companies respectively [2] - In terms of institutional interest, 25 companies with declining shareholder numbers were surveyed by institutions in the past month, with Shengda Resources, Guoji Precision, and Baowu Magnesium receiving the most attention [2]

Group 1 - The company has stated that its capacitor film technology is industry-leading, but it currently faces capacity constraints and is not adding new production lines due to factors such as equipment customization, delivery times, and installation adjustments [2] - The main development direction for the company's capacitor film is to vertically extend the industrial chain, focusing on raw materials, base films, and coating processes to enhance product gross margins [2]