TOKYO, Mar 16 (Pulse News Wire) – Idemitsu Kosan CO.,LTD. (5019.T) completed its accelerated share repurchase (ASR) program.

The final number of shares acquired was determined post-adjustment: 1. Total shares acquired: 65,529,800 (including 8,869,500 shares from sources other than Nomura Securities Co., Ltd.) 2.

Post-adjustment details: - Average stock price: March 16, 2026 (simple average of volume-weighted average prices from March 21, 2025, to March 13, 2026) - Reference amount: ¥59.78 billion (equivalent to the sale proceeds from the self-share off-market purchase transaction conducted on March 19, 2025, via the Tokyo Stock Exchange) - Reference share count: 51,868,000 (shares purchased from Nomura Securities Co., Ltd. during the self-share off-market purchase transaction on March 19, 2025) - Adjustment share count increase: 4,792,300 For more detailed information, refer to the press release dated March 18, 2025, titled “Notice Regarding Self-Share Purchase Through ToSTNeT-3 Off-Market Trading (Accelerated Share Repurchase).”.

Original Disclosure (PDF)

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