Core Insights - The article highlights the current AH premium rates of various stocks, with Northeast Electric (00042), Sinopec Oilfield Service (01033), and Andeli Juice (02218) leading the premium rankings at 864.29%, 271.60%, and 243.99% respectively [1][2] - Conversely, CATL (03750), Hengrui Medicine (01276), and China Merchants Bank (03968) have the lowest AH premium rates, with values of -15.84%, 1.21%, and 1.28% respectively [1][2] AH Premium Rate Rankings - The top three stocks with the highest AH premium rates are: - Northeast Electric (00042): H-share at 0.280 HKD, A-share at 2.25 CNY, premium rate of 864.29%, deviation value of 45.78% [1] - Sinopec Oilfield Service (01033): H-share at 0.810 HKD, A-share at 2.51 CNY, premium rate of 271.60%, deviation value of 47.60% [1] - Andeli Juice (02218): H-share at 16.050 HKD, A-share at 46.09 CNY, premium rate of 243.99%, deviation value of 14.60% [1] - The bottom three stocks with the lowest AH premium rates are: - CATL (03750): H-share at 535.000 HKD, A-share at 375.88 CNY, premium rate of -15.84%, deviation value of -0.86% [1] - Hengrui Medicine (01276): H-share at 76.300 HKD, A-share at 64.47 CNY, premium rate of 1.21%, deviation value of 4.33% [1] - China Merchants Bank (03968): H-share at 49.960 HKD, A-share at 42.24 CNY, premium rate of 1.28%, deviation value of -2.95% [1] Deviation Value Rankings - The stocks with the highest deviation values are: - Sinopec Oilfield Service (01033): premium rate of 271.60%, deviation value of 47.60% [1] - Northeast Electric (00042): premium rate of 864.29%, deviation value of 45.78% [1] - Shandong Molong (00568): premium rate of 122.86%, deviation value of 44.45% [1] - The stocks with the lowest deviation values are: - Tianjin Chuangye Environmental Protection (01065): premium rate of 60.04%, deviation value of -27.29% [2] - Shanghai Electric (02727): premium rate of 141.91%, deviation value of -21.13% [2] - China National Foreign Trade Transportation Group (00598): premium rate of 38.03%, deviation value of -17.35% [2]

Core Viewpoint - The company will disclose the shareholding status of its top ten shareholders as of September 30, 2025, in its third-quarter report scheduled for release on October 29, 2023 [1] Group 1 - An investor inquired about the shareholding status of the fourth largest shareholder, China CITIC Limited, as of October 21, 2025 [1] - The company confirmed that the information will be included in the upcoming third-quarter report [1]

Core Insights - Southbound funds reduced their holdings in Sinopec Oilfield Service Corporation (01033.HK) by 4.386 million shares on October 22, 2025, marking a decrease of 0.53% [1][2] - Over the past five trading days, there were four days of net increases in holdings by southbound funds, totaling a net increase of 20.34 million shares [1] - In the last 20 trading days, there were 14 days of net increases, with a cumulative net increase of 25.556 million shares [1] - As of now, southbound funds hold 823 million shares of Sinopec Oilfield Service, accounting for 15.19% of the company's total issued ordinary shares [1] Trading Data Summary - On October 22, 2025, total shares held were 823 million, with a decrease of 4.386 million shares [2] - On October 21, 2025, total shares held were 827 million, with an increase of 19.666 million shares [2] - On October 20, 2025, total shares held were 807 million, with an increase of 2.456 million shares [2] - On October 17, 2025, total shares held were 805 million, with an increase of 1.442 million shares [2] - On October 16, 2025, total shares held were 803 million, with an increase of 1.162 million shares [2] Company Overview - Sinopec Oilfield Service Corporation is engaged in providing comprehensive oil and gas engineering and technical services in China [2] - The company operates five divisions: - Geophysical Engineering Division focuses on land and marine geophysical exploration and development technical services - Drilling Engineering Division provides land and marine drilling design, construction, technical services, and drilling equipment - Logging Engineering Division offers engineering contracting and technical services for collecting, monitoring, transmitting, processing, interpreting, and evaluating oil and gas well, geological, and engineering information - Downhole Operations Engineering Division provides petroleum engineering technical services and construction - Engineering Construction Division conducts feasibility studies, design, procurement, and construction for land and marine oil and gas field projects [2]

证券代码：600871 证券简称：石化油服 公告编号：2025-035 中石化石油工程技术服务股份有限公司 关于 2025 年前三季度对外担保实际发生情况的公告 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： | | 被担保人名称 | | 中石化胜利石油工程有限公司 | | | --- | --- | --- | --- | --- | | | 本次担保金额 | 0.4 | 亿元 | | | 担保对象 | 实际为其提供的担保余额 | 11.68 | 亿元 | | | | 是否在前期预计额度内 | 是 | □否 | □不适用：_________ | | | 本次担保是否有反担保 | □是 | 否 | □不适用：_________ | | | 被担保人名称 | | | 中石化中原石油工程有限公司 | | | 本次担保金额 | 7.65 | 亿元 | | | 担保对象二 | 实际为其提供的担保余额 | 32.21 | 亿元 | | | | 是否在前期预计额度内 | 是 | □否 | □不适用：_________ ...

股票代码：600871 股票简称：石化油服 公告编号：临 2025-034 中石化石油工程技术服务股份有限公司 关于 A 股股票交易异常波动的公告 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。 特别提示： 一、股票交易异常波动的具体情况 公司 A 股股票 2025 年 10 月 20 日、10 月 21 日和 10 月 22 日连续三个交易 日内收盘价格涨幅偏离值累计超过 20%。根据《上海证券交易所交易规则》的有 关规定，属于股票交易异常波动。 二、公司关注并核实的相关的情况 针对公司股票交易异常波动，公司对有关事项进行了自查，并向公司控股股 东及实际控制人中国石油化工集团有限公司发函问询，具体情况核实如下： （一）生产经营情况 目前本公司及控股子公司的生产经营正常，市场环境或行业政策未发生重大 调整，生产成本和销售等情况未出现大幅波动，内部生产经营秩序正常。 （二）重大事项情况 1 （四）其他股份敏感信息 公司未发现其他可能对本公司股价产生较大影响的重大事件；公司董事、监 事、高级管理人员、控股股东及其一致行动人在本次股 ...

格隆汇10月22日｜石化油服发布异动公告，公司A股股票在2025年10月20日、21日和22日连续三个交易 日内收盘价格涨幅偏离值累计超过20%，属于股票交易异常波动。经公司自查，并书面问询控股股东及 实际控制人，截至本公告披露日，确认本公司、本公司控股股东及实际控制人不存在应披露而未披露的 重大信息。截至目前，本公司、本公司控股股东及实际控制人均不存在正在筹划涉及本公司的重大资产 重组、股份发行、重大交易类事项、业务重组、股份回购、股权激励、破产重整、重大业务合作、引进 战略投资者等重大事项。 ...

Core Viewpoint - Sinopec Oilfield Services (600871) has experienced a significant stock price fluctuation, with a cumulative increase of over 20% in the closing price over three consecutive trading days from October 20 to 22, 2025, indicating abnormal trading activity [1] Summary by Sections - **Stock Price Movement** - The company's A-share stock price has shown a cumulative increase of over 20% during the specified trading days, which is classified as abnormal stock trading activity according to the Shanghai Stock Exchange regulations [1] - **Company's Response** - Following the stock price volatility, the company conducted a self-examination and inquired with its controlling shareholder and actual controller, confirming that there are no undisclosed significant information as of the date of the announcement [1] - **Investor Advisory** - The company has advised investors to be cautious of the risks associated with secondary market trading and to make rational investment decisions [1]

Core Viewpoint - Sinopec Oilfield Services (01033) experienced a significant stock price fluctuation, with a cumulative closing price deviation exceeding 20% over three consecutive trading days from October 20 to 22, 2025, indicating abnormal trading activity [1] Summary by Relevant Sections - **Stock Price Movement** - The company's A-share stock price showed a cumulative increase of over 20% during the specified trading days, which is classified as abnormal trading behavior according to the Shanghai Stock Exchange regulations [1] - **Company's Response** - Following the price volatility, the company conducted a self-examination and formally inquired its controlling shareholder and actual controller, confirming that there are no undisclosed significant information as of the date of the announcement [1] - **Investor Advisory** - The company cautioned investors about the recent significant fluctuations in stock trading prices and urged them to be aware of market risks, encouraging rational decision-making and prudent investment [1]

Core Viewpoint - Sinopec Oilfield Service Corporation's A-share stock experienced a significant price fluctuation, with a cumulative increase of over 20% during three consecutive trading days from October 20 to 22, 2025, indicating abnormal trading activity [1] Summary by Relevant Sections - **Stock Price Movement** - The stock price of Sinopec Oilfield Service Corporation (01033.HK) has shown a cumulative increase of over 20% during the trading days of October 20, 21, and 22, 2025, which is classified as abnormal price fluctuation according to the Shanghai Stock Exchange trading rules [1] - **Company's Self-Examination** - Following the price volatility, the company conducted a self-examination and inquired with its controlling shareholder and actual controller, confirming that there are no undisclosed significant information as of the date of the announcement [1] - **Investor Advisory** - The company has advised investors to be cautious of the risks associated with secondary market trading due to the recent significant price fluctuations [1]

香港交易及結算所有限公司及香港聯合交易所有限公司對本公告的內容概不負責，對其準確性或完整性亦 不發表任何聲明，並明確表示，概不會因本公告全部或任何部份內容而產生或因倚賴該等內容而引致的任 何損失承擔任何責任。 中石化石油工程技術服務股份有限公司 （在中華人民共和國註冊成立之股份有限公司） （股份代號：1033） 海外監管公告 此海外監管公告乃根據香港聯合交易所有限公司證券上市規則第 13.10B 條作 出。 茲載列中石化石油工程技術服務股份有限公司在上海證券交易所網站刊登的以 下資料全文，僅供參考。 承董事會命 沈澤宏 公司秘書 2025年10月22日 於本公告日期，本公司現任董事為吳柏志先生 # 、張建闊先生 # 、章麗莉女士 + 、杜 坤先生 + 、鄭衛軍先生 * 、王鵬程先生 * 、劉江寧女士 * 1 # 執行董事 + 非執行董事 * 獨立非執行董事 股票代码：600871 股票简称：石化油服 公告编号：临 2025-035 中石化石油工程技术服务股份有限公司 目前本公司及控股子公司的生产经营正常，市场环境或行业政策未发生重大 调整，生产成本和销售等情况未出现大幅波动，内部生产经营秩序正常。 （二）重大 ...