Mar. 27, 2025

Nippon Steel Corporation

Regarding the timely disclosure titled “Acquisition of United States Steel Corporation” dated as of December 18, 2023, Nippon Steel Corporation (“Nippon Steel”) would like to inform you that there has been a change as described below.

1. Reason for the change

The acquisition of United States Steel Corporation (“U. S. Steel”) by Nippon Steel (the “Acquisition") is still being pursued in collaboration with U. S. Steel. Therefore, we have revised the estimated closing date of the Acquisition, which was previously changed on December 26, 2024.

2. The section and content of the change

The content disclosed in the section “5. Schedule (3) Estimated Date of Closing”

(Before the change)

First quarter of calendar year 2025 (Estimate*)

*Subject to receipt of regulatory approvals and other conditions as specified in the merger agreement.

(After the change)

Second quarter of calendar year 2025 (Estimate*)

*Subject to receipt of regulatory approvals and other conditions as specified in the merger agreement.

3. The impact on Performance

There is no impact on our consolidated performance.

*For more information about this acquisition, please refer to the press release on December 18, 2023. (Updated disclosure on December 19, 2023, April 15, 2024, May 3, 2024, May 30, 2024, and December 26, 2024)

https://www.nipponsteel.com/common/secure/en/ir/library/pdf/20231218_100.pdf

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