Sumco CorporationTSE: 3436

Announcement concerning Difference between Forecast and Actual Figures for the Fiscal Year Ended December 31, 2025

· Issued by Sumco Corporation

TRANSLATION

NOTICE: The following report is an English translation of the Japanese-language original.

This press release is made pursuant to the requirements under the listing rules of, and reported to, the Tokyo Stock Exchange.

To whom it may concern,

February 10, 2026

Company name: SUMCO Corporation Representative: Mayuki Hashimoto, Representative Director

CEO & Chairman of the Board (Code: 3436, TSE Prime Market) Contact: Takayuki Komori,

General Manager of Public Relations & IR Department

(Tel: +81-3-5444-3915)

Announcement concerning Difference between Forecast and Actual Figures for the Fiscal Year Ended December 31, 2025

Please be informed of the following difference between the Company's consolidated financial results forecasts for the fiscal year ended December 31, 2025 announced on November 11, 2025 and the actual consolidated financial results announced today.

  1. Difference between forecasts and actual figures for the fiscal year ended December 31, 2025 (January 1, 2025-December 31, 2025)

    Net sales

    (millions of yen)

    Operating profit

    (millions of yen)

    Ordinary profit

    (millions of yen)

    Profit attributable to owners of parent

    (millions of yen)

    Basic earnings per share

    (yen)

    Previous forecasts (A)

    404,400

    (4,200)

    (10,900)

    (16,900)

    (48.33)

    Actual Figures (B)

    409,670

    1,342

    (3,886)

    (11,751)

    (33.60)

    Amount of change (B-A)

    5,270

    5,542

    7,013

    5,148

    Rate of change (%)

    1.3

    -

    -

    -

    (Reference)

    Results for the fiscal year ended Dec. 31, 2024

    396,619

    36,924

    37,457

    19,877

    56.84

  2. Reasons for difference

In the fiscal year ended December 31, 2025 (January 1, 2025-December 31, 2025), operating profit (loss) turned positive and outperformed the previously announced forecast as a result of steady production activities and progress in improving production costs.

In addition, due to such factors as the forex market moving at a weaker yen level than expected, ordinary loss and loss attributable to owners of parent also were better than forecasts.

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