特别提示 本公司董事会及全体董事保证本公告内容不存在任何虚假记载、误导性陈述或者 重大遗漏，并对其内容的真实性、准确性和完整性承担法律责任。 证券代码：600846 股票名称：同济科技 公告编号：2026-004 上海同济科技实业股份有限公司 关于变更签字注册会计师的公告 上海同济科技实业股份有限公司（以下简称"公司"）于 2025 年 4 月 24 日、2025 年 6 月 25 日分别召开第十届董事会第六次会议、2024 年年度股东大会， 审议通过了《关于聘任 2025 年度财务及内部控制审计机构的议案》，同意聘任 大信会计师事务所（特殊普通合伙）（以下简称"大信会计师事务所"）作为公 司 2025 年度财务及内部控制审计机构。具体内容详见公司于 2025 年 4 月 26 日 披露的《关于聘任 2025 年度财务及内部控制审计机构的公告》（公告编号： 2025-011），以及于 2025 年 6 月 26 日披露的《上海同济科技实业股份有限公司 2024 年年度股东大会决议公告》（公告编号：2025-020）。 2026 年 1 月 26 日，公司收到大信会计师事务所出具的《关于变更签字人员 的承诺函》 ...

Core Insights - In the past five trading days (January 5 to January 9), 13 companies experienced significant shareholder increases, totaling 33.76 million shares and an aggregate increase amount of 402 million yuan [1] - During the same period, 163 companies had significant shareholder reductions, with a total reduction amount of 15.48 billion yuan [1] Summary by Category Shareholder Increases - Eight companies had increases exceeding 10 million yuan, with Wanrun Co., Ltd. leading at 7.50 million shares and an increase amount of 11.43 million yuan [1] - Tongji Technology followed with an increase of 5.62 million shares and 7.48 million yuan, while Aofei Data ranked third with an increase of 5.45 million yuan [1] - The distribution of increases showed that three companies were from the Growth Enterprise Market (GEM) and nine from the main board, with GEM increases totaling 7.41 million yuan and main board increases at 316 million yuan [1] Market Performance - Stocks with shareholder increases averaged a rise of 7.47% over the past five days, outperforming the Shanghai Composite Index during the same period [1] - Notable gainers included Aofei Data, with a rise of 23.58%, followed by Biological Shares at 15.46% and Hengshi Technology at 13.70% [1] - Conversely, Hengyi Petrochemical and Huamao Logistics experienced declines of 2.60% and 0.82%, respectively [1] Fund Flow - Among the stocks with shareholder increases, eight saw net inflows of main funds, with Biological Shares receiving the highest net inflow of 67 million yuan [2] - The companies with the largest net outflows included Huamao Logistics and Hengshi Technology, with outflows of 40 million yuan and 18 million yuan, respectively [2]

Market Overview - The engineering consulting services sector experienced a decline of 0.26% on January 7, with Hualan Group leading the drop [1] - The Shanghai Composite Index closed at 4085.77, up 0.05%, while the Shenzhen Component Index closed at 14030.56, up 0.06% [1] Stock Performance - Huajian Group (600629) closed at 22.73, with a gain of 3.41% and a trading volume of 794,900 shares, totaling a transaction value of 1.808 billion yuan [1] - Other notable gainers included: - Baojian Design (920427) at 13.69, up 3.09% [1] - Jien Design (300668) at 30.60, up 3.03% [1] - Conversely, Hualan Group (301027) closed at 20.05, down 4.48%, with a trading volume of 157,000 shares and a transaction value of 320 million yuan [2] - Other significant decliners included: - Qidi Design (300500) at 69.11, down 2.58% [2] - Shenzhen Ruijie (300977) at 18.33, down 2.34% [2] Capital Flow - The engineering consulting services sector saw a net outflow of 132 million yuan from main funds, while retail investors contributed a net inflow of 69.99 million yuan [2] - Notable capital flows included: - Huajian Group (600629) with a net inflow of 104 million yuan from main funds [3] - Suzhou Planning (301505) with a net inflow of 585.40 million yuan from main funds [3] - Conversely, significant outflows were observed in: - Hualan Group (301027) with a net outflow of 1.10 million yuan from retail investors [3]

Core Viewpoint - Shanghai Tongji Science and Technology Industrial Co., Ltd. has initiated a plan to reduce its repurchased shares through centralized bidding, aiming to maintain company value and protect shareholder interests [2][3]. Summary by Sections Share Repurchase Overview - The company repurchased 4,415,520 shares from August 21, 2024, to October 17, 2024, representing 0.7068% of the total share capital [2]. Progress of the Reduction Plan - On October 22, 2025, the company announced a plan to reduce up to 4,415,520 repurchased shares within three months, starting 15 trading days after the announcement [2]. - As of December 31, 2025, the company had not yet reduced any repurchased shares [3]. - On January 6, 2026, the company reduced 295,100 shares at an average price of 14.09 yuan per share, which is 0.0472% of the total share capital [3][4]. Compliance and Regulations - The reduction plan complies with the Shanghai Stock Exchange's regulations regarding share repurchase and reduction [4][6]. - The company will disclose the progress of the share reduction in accordance with the relevant guidelines [4].

Group 1 - The company, Tongji Technology (600846.SH), announced its first reduction of repurchased shares on January 6, 2026, through centralized bidding, selling 295,100 shares, which represents 0.0472% of the total share capital [1] - The average selling price for the reduced shares was 14.09 yuan per share [1] - After this reduction, the company still holds 4,120,420 shares in its repurchase account, accounting for 0.6595% of the total share capital [1]

证券代码：600846 证券简称：同济科技 公告编号：2026-003 上海同济科技实业股份有限公司 关于首次集中竞价减持已回购股份的进展公告 本公司董事会及全体董事保证本公告内容不存在任何虚假记载、误导性陈述 或者重大遗漏，并对其内容的真实性、准确性和完整性承担法律责任。 重要内容提示： 回购股份基本情况：为维护公司价值及股东权益，上海同济科技实业股 份有限公司（以下简称"公司"）于 2024 年 8 月 21 日至 2024 年 10 月 17 日期间 通过集中竞价交易方式回购公司股份 4,415,520 股（占公司总股本的比例为 0.7068%）。详见公司于 2024 年 10 月 18 日披露的《关于股份回购实施结果暨股 份变动的公告》（公告编号：2024-050）。 减持计划的进展情况：2025 年 10 月 22 日，公司在上海证券交易所网站 （www.sse.com.cn）披露《关于集中竞价减持已回购股份计划的公告》（公告编 号：2025-037）。公司计划自该公告披露之日起 15 个交易日后的 3 个月内，通过 集中竞价方式减持不超过 4,415,520 股（不超过公司总股本的 0.7068% ...

Group 1 - The company announced a share buyback of 4,415,520 shares from August to October 2024, representing 0.7068% of the total share capital [1] - A reduction plan was disclosed on October 22, 2025, intending to sell up to 4,415,520 shares (not exceeding 0.7068% of total share capital) within three months after the announcement [1] - As of the end of 2025, no shares had been sold under the reduction plan, with the first sale occurring on January 6, 2026, involving 295,100 shares at an average price of 14.09 yuan per share, totaling 4.1578 million yuan [1] Group 2 - After the reduction, the remaining shares in the buyback account amounted to 4,120,420 shares, which is 0.6595% of the total share capital, aligning with the reduction plan [1] - The reduction plan carries uncertainties [1]

| 代码 | 名称 | 收盘价 | 涨跌幅 | 成交量(手) | 成交额(元) | | --- | --- | --- | --- | --- | --- | | 300989 | | 17.11 | -2.56% | 8.76万 | 1.51亿 | | 301136 | 招标股份 | 19.91 | -2.16% | 22.35万 | 4.46 Z | | 300635 | 中达安 | 16.35 | -1.39% | 3.20万 | 5270.33万 | | 002949 | 华阳国际 | 15.46 | -1.21% | 4.32万 | 6756.29万 | | 603909 | 建发合诚 | 11.22 | -0.97% | 5.87万 | 6601.69万 | | 300826 | 测绘股份 | 16.85 | -0.71% | 2.14万 | 3619.12万 | | 300564 | 筑博设计 | 15.52 | -0.64% | 2.40万 | 3733.35万 | | 301167 | 建研设计 | 16.27 | -0.61% | 2.57万 | 4196.81万 | | 300778 | ...

证券代码：600846 股票名称：同济科技 公告编号：2026-002 上海同济科技实业股份有限公司 关于持股 5%以上股东权益变动触及 1%刻度的 提示性公告的更正公告 特别提示 本公司董事会及全体董事保证本公告内容不存在任何虚假记载、误导性陈述或者 重大遗漏，并对其内容的真实性、准确性和完整性承担法律责任。 上海同济科技实业股份有限公司（以下简称"公司"）于 2026 年 1 月 5 日 在上海证券交易所网站（www.sse.com.cn）披露《关于持股 5%以上股东权益变 动触及 1%刻度的提示性公告》（公告编号：2026-001）。经核查发现，公告中 部分信息披露有误，现对相关内容予以更正如下： 更正后： | 投资者名称 | | | 变动前股数 | 变动前比 | 变动后股数 | 变动后比 | 权益变动方式 | 权益变动的 | 资金来源（仅 | | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | | （万股） | | | | 例（%） | （万股） | 例（%） | | 时间区间 | 增持填写） | | 发生直接持股变动的主体： | ...

证券代码：600846 证券简称：同济科技 公告编号：2026-001 上海同济科技实业股份有限公司 关于持股 5%以上股东权益变动触及 1%刻度的 提示性公告（更正后） 本公司董事会及全体董事保证公告内容与信息披露义务人提供的信息一致。 一、 信息披露义务人及其一致行动人的基本信息 1.身份类别 投资者上海杨浦商贸（集团）有限公司保证向本公司提供的信息真实、准确、完 整，没有虚假记载、误导性陈述或重大遗漏。 3.一致行动人信息 信息披露义务人在本次权益变动中不存在一致行动人。 | | □控股股东/实际控制人及其一致行动人 | | --- | --- | | | ✔其他 5%以上大股东及其一致行动人 | | 投资者及其一致行动人的身份 | □合并口径第一大股东及其一致行动人（仅适用 | | | 于无控股股东、实际控制人） | | | □其他______________（请注明） | 2.信息披露义务人信息 | 上海杨浦商贸（集团） | □ | 控股股东/实控人 | _91310000582138455G | | --- | --- | --- | --- | | | □ | 控股股东/实控人的一致 | ✔ | ...