具体内容详见公司刊登在中国证监会指定创业板信息披露网站的《关于向金融 机构申请综合授信额度及对控股子公司担保额度预计的公告》（公告编号：2025-023）。 二、担保进展情况 1、近日，为满足子公司经营发展需求，公司与中信银行股份有限公司苏州分行 重新签订了《最高额保证合同》，对子公司担保额度进行调整：为南大光电半导体材 料有限公司（以下简称"南大半导体"）提供连带责任保证担保的最高额度由 5,000 万元下调至 2,000 万元；为全椒南大光电材料有限公司（以下简称"全椒南大"）提 供连带责任保证担保的最高额度由4,000万元增加至8,000万元，新增为南大光电（乌 兰察布）有限公司（以下简称"乌兰察布南大"）提供最高额连带责任保证担保 7,000 万元。 证券代码：300346 证券简称：南大光电 公告编号：2026-010 江苏南大光电材料股份有限公司 关于对外担保额度预计的进展公告 本公司及董事会全体成员保证公告内容的真实、准确和完整，没 有虚假记载、误导性陈述或重大遗漏。 一、担保额度预计的情况概述 江苏南大光电材料股份有限公司（以下简称"公司"）于 2025 年 4 月 1 日召开 第九届董事会第 ...

Core Viewpoint - On March 13, China Eastern Airlines announced plans for share buybacks, while ten A-share listed companies disclosed plans for share reductions, indicating a mixed sentiment in the market regarding stock ownership [1][3]. Group 1: Share Buyback - China Eastern Airlines disclosed intentions to increase its shareholding [1][3]. Group 2: Share Reduction - Huaxiao Precision plans to reduce shares by no more than 0.03% by its directors and executives [5]. - Nanda Optoelectronics' shareholder Shen Jie intends to reduce shares by no more than 1% [5]. - Daotong Technology's director Yin Hui plans to reduce shares by no more than 0.0082% [5]. - Suobao Protein's shareholder Shanghai Bangji intends to reduce shares by no more than 0.75% [5]. - Chenxin Pharmaceutical's shareholder Jiangsu Chenxing plans to reduce shares by no more than 1% [5]. - Daqian Ecology's shareholder Xinhua Publishing Group intends to reduce shares by no more than 3% [5]. - Hongbai New Materials' deputy general manager Li Mingzai plans to reduce shares by no more than 0.02% [5]. - Guo New Energy's shareholder Hongzhan Real Estate intends to reduce shares by no more than 2.07% [5]. - Tengyuan Cobalt's shareholder Changjiang Chendao plans to reduce shares by no more than 2% [5]. - Shentong Technology's shareholder Biheng Investment intends to reduce shares by no more than 3% [5].

证券代码：300346 证券简称：南大光电 公告编号：2026-009 江苏南大光电材料股份有限公司 关于持股5%以上股东减持股份的预披露公告 二、本次减持计划的主要内容 本公司持股 5%以上股东沈洁女士保证向本公司提供的信息内容真实、准确、完 整，没有虚假记载、误导性陈述或重大遗漏。 本公司及董事会全体成员保证公告内容与信息披露义务人提供的信息一致。 特别提示： 持有江苏南大光电材料股份有限公司（以下简称"公司"）67,363,364股（占公司当 前总股本比例9.75%）的股东沈洁女士计划自本次减持公告披露之日起15个交易日后的 3个月内（即自2026年4月7日起至2026年7月6日止），以集中竞价或大宗交易方式减持 公司股份不超过6,911,500股（占公司当前总股本的1.00%）。 公司近日收到沈洁女士出具的《股份减持计划告知函》，现将有关情况公告如下： 一、股东基本情况 股东沈洁女士及其一致行动人持股情况如下： | 序号 | 股东名称 | 股东性质 | 持股数量 （股） | 占公司总股本 比例（%） | | --- | --- | --- | --- | --- | | 1 | 沈洁 | 公司持股5% ...

Core Viewpoint - Recent breakthroughs in the domestic high-end photoresist industry indicate a significant shift towards industrialization, with key players achieving large-scale production and certification for critical materials [1][4]. Group 1: KrF Photoresist - KrF photoresist, essential for 248nm nodes, serves as a critical link between mature and advanced processes, covering a wide range of applications from power devices to advanced packaging, and accounts for approximately 34%-35% of the overall semiconductor photoresist market [3]. - Historically, the KrF photoresist market has been dominated by Japanese companies, which hold over 90% of the global market share, leading to challenges for domestic wafer fabs in terms of high costs, long lead times, and supply risks [3][4]. - The recent establishment of a domestic 100-ton production line for KrF resin marks a significant breakthrough, addressing the upstream material bottleneck and enabling local manufacturers to achieve stable and scalable supply [4][6]. Group 2: ArF Photoresist - ArF photoresist represents a strategic advancement towards high-end processes, with Nanda Optoelectronics achieving certification and large-scale production for leading wafer fabs, covering nodes from 28nm to 14nm [6][9]. - The successful integration of KrF and ArF photoresists creates a comprehensive and sustainable tiered structure for domestic photoresist production, enhancing collaboration with domestic DUV lithography equipment [6][9]. Group 3: Industry Progress and Challenges - Despite significant advancements in KrF resin production and ArF photoresist penetration, the domestic industry still faces challenges in higher-end fields such as ArF immersion and EUV photoresists, where R&D is ongoing and competitive gaps remain [7]. - The recent achievements in photoresist production signify a milestone, reflecting the collaborative enhancement of precision chemicals, material synthesis, process adaptation, and large-scale manufacturing capabilities within the domestic semiconductor materials sector [9].

Group 1 - The semiconductor equipment ETF Huaxia (562590) opened down 1.81%, priced at 2.012 yuan [1] - Major holdings in the ETF experienced declines, including Beifang Huachuang down 1.59%, Zhongwei Company down 1.63%, and Tuo Jing Technology down 1.53% [1] - The ETF's performance benchmark is the CSI Semiconductor Materials and Equipment Theme Index return rate, managed by Huaxia Fund Management Co., Ltd. [1] Group 2 - Since its establishment on October 9, 2023, the ETF has achieved a return of 105.08%, with a one-month return of 4.72% [1]

Core Viewpoint - The article discusses the rapid growth and investment opportunities in the advanced packaging materials sector, highlighting the potential for domestic companies to replace foreign imports in critical areas of technology [7][8]. Market Overview - The global market for advanced packaging materials is projected to reach $2.032 billion by 2028, with the Chinese market expected to grow to 9.67 billion yuan by 2025 [8]. - Specific materials such as PSPI, epoxy resin, and conductive adhesives are identified as key growth areas, with significant market sizes and growth rates anticipated [8]. Investment Opportunities - The article outlines various advanced packaging materials and their respective market sizes, including: - PSPI: $528 million in 2023, expected to grow significantly [8]. - Conductive adhesives: projected to reach $3 billion by 2026 [8]. - Chip bonding materials: expected to grow from approximately $485 million in 2023 to $684 million by 2029 [8]. - The investment landscape is characterized by a shift towards domestic production, with numerous Chinese companies emerging as competitors to established foreign firms [7][8]. Industry Trends - The article emphasizes the trend of domestic substitution in advanced materials, particularly in sectors heavily reliant on imports from countries like Japan [7][8]. - It highlights the importance of innovation and R&D in maintaining competitive advantages within the industry [7][8]. Strategic Insights - Investment strategies vary across different stages of company development, from seed rounds to pre-IPO phases, with a focus on team capabilities, market potential, and product maturity [10]. - The article suggests that the current market conditions present a favorable environment for investments in advanced materials, particularly for companies that can demonstrate strong growth potential and innovative capabilities [10].

Core Viewpoint - Nanda Optoelectronics has shown significant trading activity with a 3.10% increase in stock price on February 25, 2023, and a total transaction volume of 3.496 billion yuan, indicating strong investor interest and market performance [1]. Financing and Trading Activity - On February 25, 2023, Nanda Optoelectronics recorded a financing purchase amount of 514 million yuan, with a net financing purchase of 115 million yuan after repayments of 398 million yuan [1]. - The total margin trading balance for Nanda Optoelectronics reached 2.684 billion yuan, with the financing balance accounting for 6.72% of the circulating market value, indicating a high level of leverage compared to the past year [1]. - In terms of securities lending, the company had a securities lending repayment of 11,200 shares and a securities lending sale of 18,100 shares, with a total sale value of approximately 1.0422 million yuan [1]. Company Overview - Nanda Optoelectronics, established on December 28, 2000, and listed on August 7, 2012, is located in Suzhou Industrial Park, Jiangsu Province. The company specializes in the production, research, and sales of advanced electronic materials, with applications in integrated circuits, flat displays, LEDs, third-generation semiconductors, photovoltaics, and semiconductor lasers [1]. - The revenue composition of Nanda Optoelectronics includes specialty gas products (60.95%), precursor materials (including MO sources) (27.80%), and other products (7.02% and 4.23%) [1]. Financial Performance - As of January 31, 2023, Nanda Optoelectronics had 143,800 shareholders, an increase of 19.28% from the previous period, while the average number of circulating shares per person decreased by 16.16% to 4,562 shares [2]. - For the period from January to September 2025, the company achieved a revenue of 1.884 billion yuan, representing a year-on-year growth of 6.83%, and a net profit attributable to shareholders of 301 million yuan, reflecting a year-on-year increase of 13.24% [2]. Dividend and Shareholder Information - Since its A-share listing, Nanda Optoelectronics has distributed a total of 507 million yuan in dividends, with 293 million yuan distributed over the past three years [3]. - As of September 30, 2025, notable institutional shareholders include E Fund's ChiNext ETF, holding 12.5014 million shares (a decrease of 2.1011 million shares), and Southern CSI 500 ETF, holding 10.0607 million shares (a decrease of 207,200 shares). New institutional shareholders include Guotai Junan's semiconductor materials and equipment theme ETF, holding 7.2704 million shares [3].

Group 1 - The core point of the article is that Nanda Optoelectronics has confirmed its current production capacity for ArF photoresist at 50 tons per year, with no new capacity under construction [1] - The company is actively promoting the verification and market expansion of ArF photoresist products, ensuring stable supply for previously secured orders [1] - Investors are advised to monitor the company's periodic reports for specific updates on product supply and market developments [1]

Investment Rating - The industry investment rating is optimistic [1] Core Insights - The industrial gas market is expected to reach 1.3 trillion yuan by 2026, with a CAGR of 6.8% over the next four years [3] - The competitive landscape is becoming more concentrated, with the top four companies holding 54% of the global market share and the top six in China holding 72% [3] - Growth drivers include increased outsourcing of gas supply, accelerated demand from sectors like semiconductors and new energy, and short-term benefits from macroeconomic recovery and gas price elasticity [3] Market Space - The global industrial gas market is valued at over 1 trillion, while the domestic market is around 200 billion [3] - The market is projected to grow to 284.2 billion yuan in China by 2026, with a CAGR of 9.68% from 2022 to 2026 [21] - The market is characterized by high concentration, with the top five companies holding approximately 69% of the market share [21] Equipment Market - The domestic air separation equipment market is valued at 34.1 billion yuan in 2022, with a growth rate of 25% year-on-year [4] - The market is expected to grow at a CAGR of 22% from 2019 to 2024, driven by larger equipment sizes and increased export demand [4] Electronic Specialty Gases - The semiconductor market is expected to remain strong, with a projected 30% year-on-year increase in global semiconductor sales by November 2025 [5] - There is significant potential for domestic electronic specialty gas manufacturers to replace imports and expand into global markets [5] Investment Recommendations - The report recommends focusing on leading companies in the industrial gas sector, such as Hangyang Co., and key players in electronic specialty gases like China Shipbuilding Gas and Guanggang Gas [6]

Core Viewpoint - The article discusses the rapid growth and investment opportunities in the advanced packaging materials sector, highlighting the potential for domestic companies to replace foreign imports in critical areas of technology [7][8]. Market Overview - The global market for advanced packaging materials is projected to reach $2.032 billion by 2028, with the Chinese market expected to grow to 9.67 billion yuan by 2025 [8]. - Specific materials such as PSPI and Al-X photoresist are highlighted, with PSPI's market size in China estimated at 7.12 billion yuan in 2023 [8]. Investment Opportunities - The article identifies 14 key advanced packaging materials that are critical for the semiconductor industry, emphasizing the potential for domestic companies to capture market share from foreign competitors [7][8]. - Companies like 鼎龙股份, 国风新材, and 三月科 are mentioned as potential leaders in the domestic market for advanced packaging materials [8]. Growth Projections - The market for conductive adhesives is expected to reach 3 billion yuan by 2026, while the chip bonding materials market is projected to grow from approximately $4.85 billion in 2023 to $6.84 billion by 2029 [8]. - The epoxy encapsulation materials market is anticipated to grow to $9.9 billion by 2027, indicating strong demand in the sector [8]. Competitive Landscape - The article outlines the competitive landscape, noting that foreign companies such as Fujifilm, Toray, and Dow are currently dominant in the market, but domestic firms are rapidly advancing [8]. - The need for innovation and investment in R&D is emphasized for domestic companies to compete effectively against established foreign players [8].