PATTERSON UTI ENERGY INC

Certain subsidiaries we acquired in the Ulterra acquisition are defendants in a claim brought by a subsidiary of NOV Inc. alleging breach of a license agreement related to certain patents. Such subsidiaries have asserted defenses to the claim and are defending vigorously against this claim.

On February 6, 2023, Grant Prideco, Inc., ReedHycalog UK, Ltd. ReedHycalog, LP and National Oilwell Varco, LP (“NOV”) sued Ulterra Drilling Technologies, LP (“Ulterra”) and several other companies in Texas state court. NOV seeks a declaration that United States Patent No. 8,721,752 (the “’752 Patent”) is a “Licensed RH Patent” per the terms of a license agreement between Ulterra and NOV. NOV also alleges a breach of contract based on the license agreement between NOV and Ulterra and seeks allegedly owed royalties since October 22, 2021. NOV also seeks attorney’s fees.

On February 27, 2023, Ulterra filed a plea to the jurisdiction, and subject thereto, an answer, affirmative defenses and counterclaims. Ulterra’s counterclaims include: (i) declaratory judgments of non-infringement of U.S. Pat. No. 7,568,534 and the ’752 patent; (ii) a declaratory judgment of no royalties after Oct. 22, 2021; (iii) a declaratory judgment that certain other identified patents are expired and therefore not infringed after Oct. 22, 2021; and (iv) a declaratory judgment of no breach of contract. On the same day, Ulterra filed a notice of removal in federal court for the Southern District of Texas, Houston Division (SDTX 4:23-cv-00730), as well as a corresponding notice in Texas state court. NOV moved to dismiss and remand the case back to state court. On February 17, 2024, the Court denied NOV’s motion. On March 19, 2024, Ulterra moved for judgment on the pleadings regarding its declaratory judgment that certain other identified patents are expired and therefore not infringed after October 22, 2021. On February 13, 2025, the motion was granted in part and denied in part.

In October and November 2025, the Court resolved certain dispositive motions in Ulterra’s favor, resulting in a Final Judgment in Ulterra’s favor on November 25, 2025. NOV has acknowledged that the Court’s rulings mean it cannot collect any of the royalties it had alleged were owed. On December 12, 2025, NOV filed a Notice of Appeal to the United States Court of Appeals for the Federal Circuit. The appeal is currently pending before the Federal Circuit as Docket No. 26-1266. NOV’s brief is currently due on April 20, 2026.

Additionally, we are party to various other legal proceedings arising in the normal course of our business. We do not believe that the outcome of these proceedings, either individually or in the aggregate, will have a material adverse effect on our financial condition, cash flows or results of operations.