Highlights

05-12 Idemitsu Kosan Co Ltd - to buy back up to 2.0% of own shares worth 25 billion yen RE
05-12 Idemitsu Kosan Co.,Ltd. Provides Consolidated Earnings Guidance for the Fiscal Year Ending March 31, 2027 CI
05-12 Idemitsu Kosan Co.,Ltd. Announces Dividend for the Fiscal Year Ended March 31, 2026, Payable on June 3, 2026 and Provides Dividend Guidance for the Period Ending September 30, 2026 and Fiscal Year Ending March 31, 2027 CI
05-12 Idemitsu Kosan Co.,Ltd. announces an Equity Buyback for 25,000,000 shares, representing 2.04% for ¥25,000 million. CI
05-12 Idemitsu Kosan Co.,Ltd. Reports Earnings Results for the Full Year Ended March 31, 2026 CI
05-12 Idemitsu Kosan Co.,Ltd. authorizes a Buyback Plan. CI
04-21 Idemitsu Kosan Co Ltd - To retire treasury shares worth 5.1% of outstanding stock on Apr 30 RE
04-02 Tranche Update on Idemitsu Kosan Co.,Ltd.'s Equity Buyback Plan announced on November 11, 2025. CI
03-30 Final dividend FA
03-13 Idemitsu Kosan to postpone announcement schedule for next Medium-term Management Plan from March 17, in light of current situation RE
02-10 Idemitsu Kosan's Nine-Month Net Income Plummets 59% MT
02-10 Idemitsu Kosan Co.,Ltd. Announces Dividend for Second Quarter of Fiscal Year Ended March 31, 2026 CI
02-10 Idemitsu Kosan Co.,Ltd. Reports Earnings Results for the Nine Months Ended December 31, 2025 CI
02-06 Sony Corporation, Mitsubishi Corporation, ADEKA CORPORATION , CHIMEI Corporation, ENEOS Corporation, Formosa Chemicals & Fibre Corporation, Hanwha Impact Corporation, Idemitsu Kosan Co., Ltd., Mitsui Chemicals, Inc., Neste Corporation, Qingdao Haier New Material Development Co., Ltd., SK Geo Centric Co., Ltd., Toray Industries, Inc., and Toray Advanced Materials Korea Inc. Announce to Establishment of the Global Supply Chain CI
11-21 Overwatch Capital and Idemitsu Form 1 GW Partnership to Build High-Density AI Data Centers Across Ten U.S. States CI
11-11 Idemitsu Kosan Co.,Ltd. Announces Cash Dividend for the Second Quarter Ended September 30, 2025, Payable on December 5, 2025 CI
11-11 Idemitsu Kosan Co.,Ltd. Revises Consolidated Earnings Guidance for the Fiscal Year Ending March 31, 2026 CI
11-11 Idemitsu Kosan Co.,Ltd. authorizes a Buyback Plan. CI
11-11 Idemitsu Kosan Co.,Ltd. announces an Equity Buyback for 43,000,000 shares, representing 3.34% for ¥30,000 million. CI
11-11 Idemitsu Kosan Co Ltd - announces decision to buy and cancel treasury shares RE
11-06 Idemitsu Kosan Co.,Ltd. and Source Energy Company Announce Strategic Collaboration to Co-Create Next-Generation Solar Array Products for Space Market CI
29/09/25 For interim dividend FA
29/08/25 Idemitsu Kosan Receives $400 Million Dividend from Asia Pacific Subsidiary MT
19/06/25 Japan's Idemitsu Kosan: Acquired Interests In Two Blocks Located Off The Coast Of Sarawak, Malaysia From South Korea's SK Earthon RE
13/05/25 Idemitsu Cfo: U.s. Tariffs Are Expected To Reduce Our Profits By 40 Billion Yen In Fy2025/26 RE
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