Item 4. Controls and Procedures

Occidental's President and Chief Executive Officer and its Senior Vice President and Chief Financial Officer supervised and participated in the Company's evaluation of the effectiveness of its disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934) as of the end of the period covered by this report. Based upon that evaluation, Occidental's President and Chief Executive Officer and Senior Vice President and Chief Financial Officer concluded that the Company's disclosure controls and procedures were effective as of March 31, 2026.

There has been no change in the Company's internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during the three months ended March 31, 2026 that has materially affected, or is reasonably likely to materially affect, the Company's internal control over financial reporting.

Part II Other Information

Item 1. Legal Proceedings

The Company has elected to use a $1 million threshold for disclosing certain proceedings arising under federal, state or local environmental laws when a governmental authority is a party and potential monetary sanctions are involved. For additional information regarding legal proceedings, see Note 8 - Lawsuits, Claims, Commitments and Contingencies in the Notes to Consolidated Condensed Financial Statements in Part I, Item 1 of this Form 10-Q.