In Re Pioneer Natural Resources USA, Inc. v. the State of Texas

Opinion filed June 18, 2026 In The Eleventh Court of Appeals __________ No. 11-26-00131-CV __________ IN RE PIONEER NATURAL RESOURCES USA, INC. Original Mandamus Proceeding OPINION This original proceeding involves the question of whether a defendant’s counsel should be disqualified for his discussions, outside of formal discovery, with a plaintiff’s former in-house counsel and potential witness regarding matters beyond the scope of an existing trial court order that narrowly waived the attorney-client privilege. Relator, Pioneer Natural Resources USA, Inc. (Pioneer), an oil and gas company,…