International Battery Metals Ltd.

Item 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. Resignation of Chief Executive Officer Effective July 21, 2026 (the “Effective Date”), Joseph Mills resigned from his roles as Chief Executive Officer and member of the Board of Directors (the “Board”) of International Battery Metals Ltd. (the “Company”). Mr. Mills will transition to an advisory role effective immediately and will assist with an orderly transition through his departure date of September 19, 2026. Mr. Mills’ resignation was not the result of any disagreement with the Company on any matter relating to operations, policies, or practices. Appointment of Interim Chief Executive Officer The Board appointed James Garrett Galloway as Interim Chief Executive Officer of the Company, effective July 27, 2026. Mr. Galloway, age 39, has served as the Company's Senior Vice President of Corporate Development since May 2025. He has over 15 years of experience in the energy industry including multiple finance positions, mergers and acquisitions, complex transactions, and debt and equity capital markets. Prior to joining the Company, Mr. Galloway served as Vice President of Finance at QuarterNorth Energy, an oil and gas exploration and production company, from August 2021 until May 2024, where he played a key role in establishing that company's strategy and its successful divestiture to Talos Energy, an oil and gas company specializing in the exploration, development, and production of offshore energy resources. Before QuarterNorth, he served in various finance and corporate roles at Fieldwood Energy LLC from August 2013 until August 2021. His prior experience includes finance and corporate roles of increasing responsibility at Midstates Petroleum and Dynamic Offshore Resources. He began his career in the energy group of BOK Financial focused on reserved-based lending and corporate banking needs of upstream oil and gas clients. Mr. Galloway has a bachelor's degree in business and finance from the University of Alabama. In connection with his appointment as Interim Chief Executive Officer, the Board approved cash compensation for Mr. Galloway at an annualized rate of $100,000, payable in equal monthly installments of approximately $8,333 for each month he serves in that capacity, effective July 22, 2026. This compensation is in addition to the compensation Mr. Galloway receives in his role as Senior Vice President of Corporate Development. There are no family relationships between Mr. Galloway and any director or executive officer of the Company. There are no arrangements or understandings between Mr. Galloway and any other person pursuant to which he was appointed as Interim Chief Executive Officer. There are no transactions between the Company and Mr. Galloway that would require disclosure under Item 404(a) of Regulation S-K.

Item 7.01 — Regulation FD Disclosure. On July 27, 2026, the Company issued a press release announcing the leadership transition described in Item 5.02 of this Current Report on Form 8-K. A copy of the press release is furnished as Exhibit 99.1 hereto. The information in this Item 7.01, including Exhibit 99.1, is being furnished and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.