Core Insights - The report predicts adjustments to the North Exchange 50 Index on June 16, 2025, with a review cutoff date of May 16, 2025 [3] - The predicted stocks to be added to the index include Lierda, Tongguan Mining Construction, Wanda Bearings, Juxing Technology, and Yinuowei, while stocks to be removed include Guangsha Environmental Energy, Kangle Health, Tianfang Biao, Tongxiang Technology, and Kaide Quartz [3][4] - Historical data shows that stocks added to the index have an 80% probability of outperforming the index in the five trading days leading up to the adjustment, with an average excess return of 4.7%, while stocks removed have an 80% probability of underperforming, with an average excess return of -2.4% [3][6] Stock Adjustments - The average daily trading volume and market capitalization for the past six months were used to determine the adjustments, with specific figures for each stock listed [4][5] - The stocks being added have varying average daily trading volumes, with Lierda at 22,484 thousand CNY and a market cap of 5.6 billion CNY, while stocks being removed have lower trading volumes, such as Guangsha Environmental Energy at 4,710 thousand CNY and a market cap of 2.64 billion CNY [4] Impact Coefficients - The report calculates the impact coefficients for the stocks being added and removed from the index, with Tongguan Mining Construction having the highest impact coefficient of 1.86 among the new additions, and Kangle Health having the highest at 7.36 among the removals [3][9] - The impact coefficients are derived from the ratio of stock weight to average daily trading volume, indicating the potential influence of these stocks on the index [3][9]

Core Viewpoint - Kaide Quartz (835179.BJ) announced a significant change in the equity holdings of its controlling shareholders and their concerted actors, with a reduction of over 1% in their shareholding [1] Group 1: Shareholding Changes - On May 6, 2025, the employee stock ownership platform Beijing Deyicheng Investment Development Center (Limited Partnership) reduced its holdings from 9.1200% to 8.7109% by selling 306,820 shares [1] - Beijing Yingkai Quartz Investment Development Center (Limited Partnership) decreased its holdings from 2.5333% to 2.1467% by selling 290,000 shares on the same date [1] - The combined shareholding of Deyicheng, Yingkai Quartz, and their concerted actors decreased from 42.2746% to 41.4788% due to this reduction [1] Group 2: Total Shares Held - Before the reduction, Deyicheng, Yingkai Quartz, and their concerted actors held a total of 31,705,947 shares in Kaide Quartz; after the reduction, this number decreased to 31,109,127 shares [2] - The total reduction in shareholding amounted to 596,820 shares, representing a decrease of 0.7958% [2] Group 3: Company Background - Kaide Quartz was listed on the Beijing Stock Exchange on March 4, 2022, with Tianfeng Securities (601162) as the lead underwriter [2] - The company raised a total of 30 million yuan by issuing 15 million shares at a price of 20.00 yuan per share, with a net fundraising amount of 26.95269 million yuan [3]

证券代码：835179 证券简称：凯德石英 公告编号：2025-052 北京凯德石英股份有限公司 关于控股股东、实际控制人及其一致行动人 权益变动达到 1%的提示性公告 变动类型 增加 减少 是否存在一致行动人 是 否 是否为第一大股东、实际控制人或其 一致行动人 是 否 信息披露义务人 名称 持股变动时间 北京英凯石英投资发 展中心（有限合伙） 2025 年 5 月 6 日 股票简称 凯德石英 股票代码 835179 变动类型 增加 减少 是否存在一致行动人 是 否 是否为第一大股东、实际控制人或其 一致行动人 是 否 | | 本次权益变动情况 | | | | --- | --- | --- | --- | | 股东名称 | 变动方式 | 减持股数 | 减持比例 | | 北京德益诚投资发展 中心（有限合伙） | 集中竞价 | 306,820 | 0.4091% | | 北京英凯石英投资发 展中心（有限合伙） | 集中竞价 | 290,000 | 0.3867% | （二）本次权益变动前后，信息披露义务人及其一致行动人拥有上市公司权益 的股份情况 | 股东名称 | 股份性质 | | 本次变动前持有股份 | 本 ...

证券代码：835179 证券简称：凯德石英 公告编号：2025-051 北京凯德石英股份有限公司 2024 年年度报告说明会预告公告 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、误导性陈述或者重大遗漏，并对其内容的真实性、准确性和完整性承 担个别及连带法律责任。 一、 说明会类型 北京凯德石英股份有限公司（以下简称"公司"）于 2025 年 4 月 22 日在 北京证券交易所指定信息披露平台（www.bse.cn）披露了《2024 年年度报告》 （公告编号：2025-029），为方便广大投资者进一步了解公司 2024 年年度经营 业绩情况，公司拟召开 2024 年年度报告说明会。 二、 说明会召开的时间、地点 （一）会议召开时间：2025 年 5 月 13 日（星期二）15：00-17:00。 （二）会议召开地点 本次年度报告说明会将采用网络方式召开，投资者可登陆中证路演中心 （https://www.cs.com.cn/roadshow/）参与本次年度报告说明会。 三、 参加人员 公司董事长：张忠恕先生； 公司董事会秘书：南舒宇女士； 公司财务总监：周文女士； 公司保荐代表人：李统 ...

证券代码：835179 证券简称：凯德石英 公告编号：2025-049 北京凯德石英股份有限公司 （一）会议召开情况 本次会议符合《公司法》、《公司章程》和《监事会议事规则》的有关规定。 （二）会议出席情况 会议应出席监事 3 人，出席和授权出席监事 3 人。 二、议案审议情况 （一）审议通过《关于 2025 年第一季度报告的议案》 1.议案内容： 根据北京证券交易所相关规定，公司编制了《2025 年第一季度报告》。 第四届监事会第六次会议决议公告 本公司及监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、误导性陈述或者重大遗漏，并对其内容的真实性、准确性和完整性承担个 别及连带法律责任。 一、会议召开和出席情况 具 体 内 容 详 见 公 司 于 同 日 在 北 京 证 券 交 易 所 官 方 信 息 披 露 平 台 （http://www.bse.cn/）披露的公告，公告编号为 2025-050。 1.会议召开时间：2025 年 4 月 28 日 2.会议召开地点：公司会议室 3.会议召开方式：现场 4.发出监事会会议通知的时间和方式：2025 年 4 月 23 日以书面方式发出 5.会议主持 ...

证券代码：835179 证券简称：凯德石英 公告编号：2025-048 北京凯德石英股份有限公司 第四届董事会第七次会议决议公告 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、误导性陈述或者重大遗漏，并对其内容的真实性、准确性和完整性承担个 别及连带法律责任。 一、会议召开和出席情况 （一）会议召开情况 会议应出席董事 7 人，出席和授权出席董事 7 人。 董事张凯轩因工作原因以通讯方式参与表决。 2.议案表决结果：同意 7 票；反对 0 票；弃权 0 票。 本项议案经过公司第四届董事会审计委员会第三次会议审议通过。 3.回避表决情况： 该议案不涉及关联交易，无需回避表决。 4.提交股东会表决情况： 1.议案内容： 二、议案审议情况 （一）审议通过《关于 2025 年第一季度报告的议案》 根据北京证券交易所相关规定，公司编制了《2025 年第一季度报告》。 具 体 内 容 详 见 公 司 于 同 日 在 北 京 证 券 交 易 所 官 方 信 息 披 露 平 台 （http://www.bse.cn/）披露的公告，公告编号为 2025-050。 1.会议召开时间：2025 年 4 月 ...

Financial Performance - Net profit attributable to shareholders decreased by 13.56% to CNY 9,976,972.59 for the first quarter of 2025, down from CNY 11,542,541.29 in the same period last year[9] - Operating revenue for the first quarter of 2025 was CNY 85,317,542.06, reflecting a slight increase of 0.81% compared to CNY 84,633,111.64 in the previous year[9] - The company's net profit for Q1 2025 was CNY 5,164,805.20, a decrease of 34.8% compared to CNY 7,939,068.49 in Q1 2024[46] - The total profit for Q1 2025 was CNY 5,802,891.93, down from CNY 8,397,344.21 in Q1 2024, reflecting a decline of 30.5%[45] - The operating profit for Q1 2025 was CNY 5,802,054.79, down from CNY 8,389,821.94 in Q1 2024, reflecting a decline of 30.7%[45] - Total operating costs for Q1 2025 were ¥70,163,077.76, compared to ¥67,754,162.92 in Q1 2024, indicating a rise in costs[42] - The total comprehensive income for Q1 2025 was CNY 5,164,805.20, compared to CNY 7,939,068.49 in Q1 2024[46] Assets and Liabilities - Total assets increased by 3.16% to CNY 1,043,644,090.60 as of March 31, 2025, compared to CNY 1,011,705,895.55 at the end of 2024[9] - The company's asset-liability ratio (consolidated) was 22.01%, up from 21.17% at the end of the previous year[9] - Total liabilities increased to ¥229,678,921.69 from ¥214,181,278.54, reflecting a rise of about 7.2%[38] - Total liabilities reached ¥132,914,242.88 as of March 31, 2025, up from ¥111,486,187.85 at the end of 2024[41] - The company has a total of ¥63,223,209.67 in assets under restrictions, accounting for 6.06% of total assets[30] Cash Flow - The company's cash flow from operating activities showed a significant improvement, with a net outflow of CNY -2,378,574.20, an 81.20% reduction in outflow compared to CNY -12,654,803.38 in the previous year[9] - Cash flow from operating activities for Q1 2025 was negative at -3,106,716.93 CNY, compared to -8,337,111.34 CNY in Q1 2024, indicating an improvement[49] - The company generated CNY 41,211,647.45 in cash from sales of goods and services in Q1 2025, an increase from CNY 31,754,955.88 in Q1 2024[47] - Total cash inflow from operating activities was 19,630,390.88 CNY in Q1 2025, slightly down from 20,064,669.33 CNY in Q1 2024[49] - The ending cash and cash equivalents balance for Q1 2025 was 76,367,860.12 CNY, up from 95,587,549.78 CNY in Q1 2024[50] Shareholder Information - The total number of unrestricted shares decreased from 59,509,255 to 59,260,770, representing a change of -248,485 shares, which is a reduction from 79.35% to 79.01% of total shares[17] - The total number of restricted shares increased from 15,490,745 to 15,739,230, with a change of 248,485 shares, rising from 20.65% to 20.99% of total shares[17] - The largest shareholder, Zhang Zhongshu, holds 14,869,947 shares, accounting for 19.83% of total shares, with no change during the period[19] - The shareholding structure shows that 51.20% of shares are held by the top ten shareholders, with no pledges or judicial freezes reported[20][19] - The company has 7,766 common shareholders as of the end of the reporting period[17] Research and Development - Research and development expenses decreased by 32.21% to CNY 4,243,241.21, mainly due to reduced material consumption for ongoing projects[11] - Research and development expenses for Q1 2025 were CNY 3,360,082.32, a decrease of 36.4% compared to CNY 5,285,015.32 in Q1 2024[45] Other Income and Expenses - Other income increased by 53.80% to CNY 1,059,803.79, primarily due to an increase in input tax deductions[11] - Non-recurring gains and losses totaled CNY 165,264.22 after tax, reflecting various adjustments and government subsidies[14] - The company recorded a credit impairment loss of CNY -1,384,771.48 in Q1 2025, compared to CNY -1,514,622.35 in Q1 2024[45] Financing Activities - Short-term borrowings rose by 113.25% to CNY 38,078,806.01, attributed to increased borrowings by the parent company and a subsidiary[10] - The company reported a short-term loan of ¥38,078,806.01, which increased from ¥17,856,706.28, indicating a significant rise of approximately 113.8%[38] - Financing activities generated a net cash flow of 17,025,892.57 CNY in Q1 2025, compared to 12,657,262.81 CNY in Q1 2024, showing an increase[50]

Investment Rating - The investment rating for the company is "Buy" (maintained) [1] Core Insights - The company achieved a revenue of 306.30 million yuan in 2024, representing a year-on-year growth of 17.95%. However, the net profit attributable to the parent company decreased by 13.31% to 32.91 million yuan due to increased depreciation from new high-end quartz product projects and higher overall expenses from stock incentive plans [1][9] - The semiconductor industry is experiencing favorable conditions, supported by policies that promote the development of advanced semiconductor materials. The demand for quartz materials is expected to accelerate, driven by the growth in 5G fiber optics and the photovoltaic industry [9] - The company's subsidiary, Kaide Xinjie, is progressing well in its semiconductor precision component production base, which is expected to enhance capacity. The project has received ISO:9001 certification and has attracted several high-end quartz product clients [9] - The company is actively promoting technological innovation, having obtained 9 invention patents in 2024 and receiving several industry awards for its contributions to quartz materials [9] Financial Summary - The total revenue forecast for 2024 is 306 million yuan, with a projected growth rate of 17.95%. The net profit attributable to the parent company is expected to be 32.91 million yuan, with a decline of 13.31% [1][11] - The gross profit margin for 2024 is 41.67%, an increase of 2.77 percentage points year-on-year [9] - The company’s earnings per share (EPS) for 2024 is projected at 0.44 yuan, with a price-to-earnings (P/E) ratio of 79.43 [1][11]

证券代码：835179 证券简称：凯德石英 公告编号：2025-047 北京凯德石英股份有限公司 投资者关系活动记录表 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、误导性陈述或者重大遗漏，并对其内容的真实性、准确性和完整性承 担个别及连带法律责任。 一、 投资者关系活动类别 □特定对象调研 □业绩说明会 □现场参观 □新闻发布会 □媒体采访 √分析师会议 □路演活动 □其他 二、 投资者关系活动情况 活动时间：2025 年 4 月 23 日 活动地点：网络调研 问题 1：请介绍公司产品结构。 回答：公司产品主要应用于半导体集成电路芯片领域、光伏太阳能行业领 域等下游领域。2024 年度，半导体集成电路芯片用石英产品收入占 2024 年营 业收入的 77.41%；光伏太阳能行业用石英产品收入占比为 2024 年营业收入的 20.36%；其他行业用石英产品营业收入占 2024 年营业收入的 2.23%。 问题 2：公司半导体产品和光伏产品的毛利率情况。 回答：2024 年度，公司半导体集成电路芯片用石英产品毛利率为 47.58%， 光伏太阳能行业用石英产品毛利率为 19.15%。 问题 ...

Financial Performance - The basic earnings per share for 2024 is 0.4400 yuan, a decrease of 15.38% compared to 2023's 0.5200 yuan [1] - The operating revenue for 2024 is 3.06 billion yuan, representing a 17.69% increase from 2.6 billion yuan in 2023 [1] - The net profit for 2024 is 0.33 billion yuan, down 13.16% from 0.38 billion yuan in 2023 [1] - The return on equity for 2024 is 4.62%, a decline of 17.35% from 5.59% in 2023 [1] - The net asset per share increased to 9.78 yuan, up 3.38% from 9.46 yuan in 2023 [1] - The undistributed profits per share rose to 3.31 yuan, an increase of 10.33% from 3.00 yuan in 2023 [1] Shareholder Structure - The top ten unrestricted shareholders hold a total of 23.49 million shares, accounting for 39.46% of the circulating shares, a decrease of 867.45 thousand shares from the previous period [1] - Wang Yumin holds 794.60 thousand shares, representing 13.35% of the total share capital, unchanged from the previous period [2] - Beijing Deyicheng Investment Development Center holds 413.25 thousand shares, accounting for 6.94%, also unchanged [2] - Li Yanxia's holdings decreased by 33.68% to 300.00 thousand shares [2] - Beijing Zhongxing Tongyuan Investment Co., Ltd. saw a significant reduction of 48.69% in its holdings to 124.70 thousand shares [2] - New entrants in the top ten shareholders include several funds from Industrial and Commercial Bank of China, with holdings ranging from 32.91 thousand to 71.13 thousand shares [2] Dividend Distribution - The company has proposed a dividend distribution of 1.2 yuan per share (including tax) [4]