Major A‑Share index adjustments — CSI Announces Changes Including Zhongji Xuchuang and Shenghong Technology

Quick summary — what investors, founders, techies, and marketers need to know

This announcement covers routine, periodic reconstitutions across multiple major A‑share indices including the CSI 300, CSI 500, CSI 1000, CSI A50, CSI A100, CSI A500 and several Shanghai and Shenzhen exchange indices.

The bulk of changes are effective after market close on December 12, 2025 for indices compiled by China Securities Index.

The Shenzhen exchange‑related index changes are effective after market close on December 15, 2025 per Shenzhen Stock Exchange notices.

What was announced — index reconstitution highlights and representative new inclusions

The reconstitutions are the standard, methodology‑driven updates carried out by index advisory committees to keep indices aligned with their rules and the investable universe.

Below are the key index changes and representative stocks newly added to those indices (pinyin then Chinese name in parentheses).

CSI 300 (Hushen 300, 沪深300)

• 11 constituents replaced.

• Selected stocks added include:

• • Huadian Xinneng (Huadian Xinneng 华电新能)

  • Dongshan Precision (Dongshan Jingmi 东山精密)

  • Zhinanzhen (Zhinanzhen 指南针)

  • Shenghong Technology (Shenghong Keji 胜宏科技)

CSI 500 (Zhongzheng 500, 中证500)

• 50 constituents replaced.

• Selected additions:

• • Heertai (Heertai 和而泰)

  • Hua Hong Company (Huahong Gongsi 华虹公司)

  • Oriental Yuhong (Dongfang Yuhong 东方雨虹)

  • Trina Solar (Tianhe Guangneng 天合光能)

CSI 1000 (中证1000)

• 100 constituents replaced.

• Selected additions:

• • Shijia Photon (Shijia Guangzi 仕佳光子)

  • Yongding (Yongding Gufen 永鼎股份)

  • Wangfujing (Wangfujing 王府井)

  • Dekele (Dekeli 德科立)

CSI A50 (中证A50)

• 4 constituents replaced.

• Selected additions:

• • Huagong Technology (Huagong Keji 华工科技)

  • Guangqi Technology (Guangqi Jishu 光启技术)

  • Zhongji Xuchuang (Zhongji Xuchuang 中际旭创)

  • Shenghong Technology (Shenghong Keji 胜宏科技)

CSI A100 (中证A100)

• 6 constituents replaced.

• Selected additions:

• • East Money (Dongfang Caifu 东方财富) — widely known as East Money.

  • Shenghong Technology (Shenghong Keji 胜宏科技)

  • Inspur (Zhongke Shuguang 中科曙光)

  • Seres (Sailisi 赛力斯)

CSI A500 (中证A500)

• 20 constituents replaced.

• Selected additions:

• • Guotai Haitong (Guotai Haitong 国泰海通)

  • Xinyuan (Xinyuan Gufen 芯原股份)

  • Zhinanzhen (Zhinanzhen 指南针)

Shanghai Exchange Indices (effective after close on 2025‑12‑12)

• SSE 50 (Shangzheng 50 上证50) — 4 replacements.

• Selected additions include:

• • SAIC Motor (Shangqi Jituan 上汽集团)

  • Northern Rare Earth (Beifang Xitu 北方稀土)

  • Inspur (Zhongke Shuguang 中科曙光)

• SSE 180 (上证180) — 7 replacements.

• Selected additions include Guotou Capital (Guotou Ziben 国投资本), Zhongtian Technology (Zhongtian Keji 中天科技) and Rockchip (Ruixinwei 瑞芯微).

• SSE 380 (上证380) — 38 replacements.

• Selected additions include COSCO Shipping Energy (Zhongyuan Haineng 中远海能), Kingfa Technology (Jinfa Keji 金发科技), CNOOC Drilling (Zhonghai Youfu 中海油服) and Baiwei Storage (Baiwei Cunchu 佰维存储).

• STAR 50 / Sci‑Tech Innovation 50 (科创50) — 2 replacements.

• Selected additions: Aojie Technology (Aojie Keji 翱捷科技), Shengke Communication (Shengke Tongxin 盛科通信).

Shenzhen Exchange Indices (effective after close on 2025‑12‑15)

• Shenzhen Component Index (Shenzhen Chengzhi 指数) — 17 replacements.

• Selected additions include Shen Shenfang A (Shenshen Fang A 深深房A), Demingli (Demingli 德明利) and Changxin Bochuang (Changxin Bochuan 长芯博创).

• ChiNext (ChiNext Index 创业板指) — 8 replacements.

• Selected additions include Shuanglin (Shuanglin Gufen 双林股份), Changshan Pharmaceutical (Changshan Yaoye 常山药业) and Changxin Bochuang (长芯博创).

• Shenzhen 100 (深证100) — 7 replacements.

• Selected additions include Cangge Mining (Cangge Kuangye 藏格矿业), Guohang (Guohuo Hang 国货航), Dongshan Precision (Dongshan Jingmi 东山精密) and Shenghong Technology (胜宏科技).

• ChiNext 50 (创业板50) — 5 replacements.

• Selected additions include Changshan Pharmaceutical (常山药业), Feilihua (Feilihua 菲利华), Changxin Bochuang (长芯博创), Jinli Permanent Magnet (Jinli Yongci 金力永磁) and Xiechuang Data (Xiechuang Shuju 协创数据).

Market impact and timeline

The announced changes are standard, periodic reconstitutions intended to keep indices aligned with their rules and investable universe.

CSI confirmed adjustments will be effective after the market close on December 12, 2025 for indices under its compilation.

Shenzhen Stock Exchange indices will take effect after market close on December 15, 2025.

Market participants, including ETFs and passive funds, generally adjust holdings ahead of the effective date to match index weights.

That rebalancing often generates temporary supply/demand pressures in affected stocks during the lead‑up to the effective date.

Investors should pay attention to trade windows, tracking error, and potential short‑term volatility around reconstitution dates.

Index changes can also influence corporate visibility and liquidity long term because inclusion often increases institutional investor interest and ETF coverage.

For founders, product teams, and marketers at companies gaining index inclusion, this is a chance to raise profile with finance audiences and potential institutional holders.

How to read these moves — actionable takeaways

• If you manage funds: update rebalance calendars and monitor potential tracking error during the adjustment window.

• If you’re an active trader: look for short windows of elevated flows into additions and out of deletions.

• If you’re a founder or operator: expect a visibility bump and possibly greater institutional attention after index inclusion.

• If you’re a market researcher: track sector rotations implied by the list of additions across indices.

Quick note on names in this article

Company and index names appear as pinyin followed by Chinese characters in parentheses to preserve original names and reduce ambiguity (for example, Zhongji Xuchuang 中际旭创).

For widely used English names where applicable (e.g., CSI 300, East Money), the common English form is used alongside the Chinese.

References

• 涉及中际旭创、胜宏科技等，A股多条重要指数样本股调整 – 东方财富

• Cailian Press homepage – 财联社

• Index reconstitution announcements – China Securities Index Co., Ltd.

Major A‑Share index adjustments