#IdemitsuKosan

From March 1 to March 31, 2026, 1,571,700 shares of treasury stock were acquired through market purchases for a total consideration of 2,308,890,650 yen.

The final number of shares acquired after post-adjustment is 65,529,800 shares, with a reference amount of 59,777,870,000 yen, and an average share price of 1,055.0211 yen (99.4% of the VWAP from March 21, 2025 to March 13, 2026).

Idemitsu Kosan has postponed the announcement of the next medium-term management plan from March 17, 2026, to May 12, 2026. The postponement is due to the need to respond to fluctuations in crude oil prices and supply conditions caused by escalating tensions in the Middle East.

Operating income plus equity in earnings for fiscal 2025 Q3 was 116.9 billion yen (significant decrease YoY), net income attributable to owners of parent was 105.7 billion yen. Major loss factors included large-scale periodic maintenance in the Fuel Oil segment and a decline in coal prices.

For the third quarter of the fiscal year ending March 2026, net sales were 5,944.6 billion yen (down 13.6% YoY), operating income was 36.7 billion yen (down 70.2% YoY), and net income attributable to owners of parent was 52.6 billion yen (down 58.7% YoY).