Announcement by Wacker Chemie AG Regarding Partial Pledge and Unpledge of Shares by Controlling Shareholder and Its Concerted Action Person

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Securities Code: 603260 Stock Abbreviation: Hesheng Silicon Industry Announcement No.: 2026-032

Hesheng Silicon Industry Co., Ltd.

Announcement on Partial Share Pledges and Unpledges by Controlling Shareholder and Its Concerted Parties

The company’s board of directors and all directors guarantee that the content of this announcement is free from any false records, misleading statements, or major omissions, and assume legal responsibility for its truthfulness, accuracy, and completeness.

Key Highlights:

As of the date of this announcement, Hesheng Silicon Industry Co., Ltd. (hereinafter referred to as “the Company”)'s controlling shareholder Ningbo Hesheng Group Co., Ltd. (hereinafter referred to as “Hesheng Group”) holds 464,840,177 shares, accounting for 39.32% of the total share capital; Hesheng Group’s concerted party Luo Liguo directly holds 10,558,753 shares, accounting for 0.89%; Luo Yedong, another concerted party, directly holds 179,406,101 shares, accounting for 15.18%; Luo Yidong, another concerted party, directly holds 192,493,302 shares, accounting for 16.28%. After this pledge and unpledge, Hesheng Group has pledged a total of 230,405,100 shares, representing 49.57% of its holdings and 19.49% of the total share capital; Luo Liguo has pledged 0 shares; Luo Yedong has pledged 94,100,000 shares, representing 52.45% of his holdings and 7.96% of the total share capital; Luo Yidong has pledged 55,500,000 shares, representing 28.83% of his holdings and 4.69% of the total share capital.

As of the date of this announcement, Hesheng Group and its concerted parties Luo Liguo, Luo Yidong, and Luo Yedong directly hold a total of 847,298,333 shares, accounting for 71.67% of the total share capital. After this pledge and unpledge, the total number of pledged shares among Hesheng Group and its concerted parties’ directly held shares is 380,005,100, representing 44.85% of their total shares and 32.14% of the total share capital.

Recently, the company received notices from the controlling shareholder Hesheng Group and its concerted parties Luo Liguo, Luo Yidong, and Luo Yedong regarding their pledged and unpledged shares. The specific details are as follows:

1. Basic information on this share pledge

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2. Basic information on this share unpledge

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3. Cumulative pledge of shareholder shares

As of the disclosure date of this announcement, the cumulative pledge situation of the above shareholders and their concerted parties is as follows:

Unit: Shares

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Note: The total differs from the sum of individual items due to rounding.

4. Other explanations

Hesheng Group and its concerted parties have good credit and financial conditions. Future repayment sources mainly include operating income, investment income, dividends from holding company shares, etc. The pledge risks are within controllable ranges and there are no substantial factors that could lead to a change in the company’s control. If pledged shares face early warning risks, Hesheng Group and its concerted parties will take measures including but not limited to additional margin, early repayment, etc., to address these risks.

The company will continue to monitor the pledge status of Hesheng Group and its concerted parties, strictly comply with relevant regulations, and fulfill information disclosure obligations in a timely manner.

This announcement is hereby made.

Hesheng Silicon Industry Co., Ltd. Board of Directors

March 17, 2026

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