# 【表紙】

【提出書類】 | 有価証券報告書
【根拠条文】 | 金融商品取引法第24条第１項
【提出先】 | 関東財務局長
【提出日】 | 2026年３月25日
【事業年度】 | 第29期(自　2025年１月１日　至　2025年12月31日)
【会社名】 | サイオス株式会社
【英訳名】 | SIOS Corporation
【代表者の役職氏名】 | 代表取締役社長　　喜　多　伸　夫
【本店の所在の場所】 | 東京都港区南麻布二丁目12番３号　サイオスビル
【電話番号】 | ０３-６４０１-５１１１ (代表)
【事務連絡者氏名】 | 取締役常務執行役員　　小 林　徳 太 郎
【最寄りの連絡場所】 | 東京都港区南麻布二丁目12番３号　サイオスビル
【電話番号】 | ０３-６４０１-５１１１ (代表)
【事務連絡者氏名】 | 取締役常務執行役員　　小 林　徳 太 郎
【縦覧に供する場所】 | 株式会社東京証券取引所 (東京都中央区日本橋兜町２番１号)

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