Mitsui Kinzoku Co., Ltd.TSE: 5706

Notice Concerning the Difference between Consolidated Financial Forecasts and Results for the second Quarter (interim period) of the Fiscal Year Ending March 2026

· Issued by Mitsui Kinzoku Co., Ltd.


Note: This document has been translated from the Japanese original for reference purposes only. In the event of any discrepancy between this translated document and the Japanese original, the original shall prevail.

To whom it may concern,

Company name: Mitsui Kinzoku Co., Ltd. Name of representative: NOU Takeshi,

November 11, 2025

President and Representative Director (Securities code: 5706; TSE Prime Market)

Inquiries: MITSUI Koki, General Manager of

Corporate Communications Department (Telephone: +81-3-5437-8028)

Notice Concerning the Difference between Consolidated Financial Forecasts and Results for the second Quarter (interim period) of the Fiscal Year Ending March 2026

Mitsui Kinzoku Co., Ltd. (the "Company") hereby announces that there has been a difference between the performance forecast announced on August 8, 2025 for the first half of the fiscal year ending March 2026 (April 1, 2025 through September 30, 2025) and the actual results, as described below.

  1. Differences between Consolidated Financial Forecasts and Results for the first half of the Fiscal Year ending March 31, 2026

    (April 1, 2025 through September 30, 2025)

    (Units: Millions of yen)

    Net sales

    Operating profit

    Ordinary profit

    Profit attributable to owners of

    parent

    Basic earnings per share

    Previously announced forecasts (A)

    355,000

    24,500

    23,000

    2,000

    yen sen

    34.98

    Actual results (B)

    364,312

    39,767

    39,141

    19,049

    333.09

    Difference (B - A)

    9,312

    15,267

    16,141

    17,049

    Change ratio (%)

    2.6

    62.3

    70.2

    852.5

    (Reference) Consolidated financial results for the first half of the fiscal year ended March 31, 2025

    348,126

    38,821

    38,388

    37,035

    647.83

  2. Reason for the difference

Regarding the results for the second quarter (interim) of the fiscal year ending March 2026, net sales, operating profit, ordinary profit, and interim net profit attributable to owners of the parent increased compared to the previous forecast (announced on August 8, 2025). This was due to factors such as an increase in sales volume of ultra-thin copper foil with carrier, a main product, and a favorable impact of precious metal prices in the catalysts business in the Engineered Materials segment, and improved profits in the Metals segment due to higher-than-expected metal prices and a weaker yen, which in turn led to an improvement in inventory factors.

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