AVIC Aircraft Systems Co., Ltd. Announcement on the Progress of Share Repurchase

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Stock code: 600372 Stock abbreviation: AVIC Electromechanical Announcement No.: 2026-017

AVIC Electromechanical Systems Co., Ltd. on the Progress of Share Repurchase

The board of directors of the Company and all of its directors warrant that there are no false records, misleading statements, or material omissions in the contents of this announcement, and assume legal responsibility for the authenticity, accuracy, and completeness of the contents.

Key matters:

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I. Basic information on the share repurchase

AVIC Electromechanical Systems Co., Ltd. (hereinafter referred to as the “Company”) held the second meeting of the eighth session of the board of directors in 2025 on April 18, 2025, at which it considered and approved the “Proposal on Repurchasing Shares of the Company by Means of Centralized Competitive Trading,” and the Company plans to use its own funds of RMB 300,000,000 (inclusive) - RMB 500,000,000 (inclusive) to repurchase shares through the Shanghai Stock Exchange’s trading system by means of centralized competitive trading. The repurchase price for this share repurchase shall not exceed RMB 17.13 per share (inclusive). All repurchased shares will be used for an employee share ownership plan or an equity incentive plan. The repurchase period shall be within 12 months from the date on which the Company’s board of directors approves the share repurchase plan (i.e., April 21, 2025 - April 20, 2026). For details, see the Company’s announcements disclosed on April 19, 2025, namely the “Announcement of AVIC Electromechanical Systems Co., Ltd. on the Share Repurchase Plan by Means of Centralized Competitive Trading and the Repurchase Report (Document)” (Announcement No.: Lin 2025-021) and the “Announcement of the Resolutions of the Second Meeting of the Eighth Session of the Board of Directors of AVIC Electromechanical Systems Co., Ltd. in 2025” (Announcement No.: Lin 2025-019).

Since the Company implemented the equity distribution for 2024, the upper limit of the share repurchase price for this centralized competitive trading-based share repurchase was adjusted from not exceeding RMB 17.13 per share (inclusive) to not exceeding RMB 17.06 per share (inclusive). For details, see the Company’s announcement disclosed on June 12, 2025, namely the “Announcement of AVIC Electromechanical Systems Co., Ltd. on Adjusting the Upper Limit of the Repurchase Price of Shares After Implementing the Equity Distribution for 2024” (Announcement No.: Lin 2025-030).

Since the Company implemented the equity distribution for the first three quarters of 2025, the upper limit of the share repurchase price for this centralized competitive trading-based share repurchase was adjusted from not exceeding RMB 17.06 per share (inclusive) to not exceeding RMB 17.03 per share (inclusive). For details, see the Company’s announcement disclosed on December 5, 2025, namely the “Announcement of AVIC Electromechanical Systems Co., Ltd. on Adjusting the Upper Limit of the Repurchase Price of Shares After Implementing the Equity Distribution for the First Three Quarters of 2025” (Announcement No.: 2025-077).

II. Progress of the share repurchase

As of March 31, 2026, the Company has cumulatively repurchased 22,988,700 shares through centralized competitive trading, accounting for 0.48% of the Company’s total share capital. The highest repurchase price was RMB 15.00 per share, the lowest repurchase price was RMB 11.70 per share, and the cumulative total amount paid was RMB 294,329,658.23 (excluding transaction fees).

The above-mentioned progress of the share repurchase complies with the provisions of relevant laws and regulations, normative documents, and the requirements of the Company’s share repurchase plan.

III. Other matters

The Company will strictly comply with relevant provisions such as the “Rules for Share Repurchases by Listed Companies” and “Self-Regulatory Guidelines No. 7 of the Shanghai Stock Exchange for Listed Companies—Share Repurchases,” and during the repurchase period will make repurchase decisions and implement them in a timely manner based on market conditions. At the same time, the Company will promptly fulfill its information disclosure obligations according to the progress of matters related to the repurchase of shares. Investors are kindly requested to pay attention to investment risks.

This announcement is hereby issued.

Board of Directors of AVIC Electromechanical Systems Co., Ltd.

April 1, 2026

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