Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Sep. 30, 2025
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal Proceedings On July 19, 2018, we filed suit against BASF Corporation ("BASF") in the United States District Court for the District of Delaware (the "Delaware Proceeding") alleging BASF infringed Ingevity's patent covering canister systems used in the control of automotive gasoline vapor emissions (U.S. Patent No. RE38,844) (the "844 Patent"). On February 14, 2019, BASF asserted counterclaims against us in the Delaware Proceeding, alleging two claims for violations of U.S. antitrust law (one for exclusive dealing and the other for tying) as well as a claim for tortious interference with an alleged prospective business relationship between BASF and a BASF customer (the "BASF Counterclaims"). The BASF Counterclaims relate to our enforcement of the 844 Patent and our entry into several supply agreements with customers of our fuel vapor canister honeycombs. The U.S. District Court dismissed our patent infringement claims on November 18, 2020, and the case proceeded to trial on the BASF Counterclaims in September 2021. On September 15, 2021, a jury in the Delaware Proceeding issued a verdict in favor of BASF on the BASF Counterclaims and awarded BASF damages of approximately $28.3 million, which trebled under U.S. antitrust law to approximately $85.0 million. On May 18, 2023, the court in the Delaware Proceeding entered judgment on the jury's verdict, which commenced the post-trial briefing stage. On February 13, 2024, the court in the Delaware Proceeding denied BASF's motion for pre-judgment interest on its tortious interference claim as well as our motion seeking judgment as a matter of law, or a new trial in the alternative. In addition, BASF has indicated it will seek attorneys' fees and costs in amounts that they will allege and have to demonstrate at a future date. Unless the judgment is set aside, BASF will be entitled to post-judgment interest pursuant to the rate provided under federal law. We disagree with the verdict, including the court's application of the law and entry of judgment. Therefore, on March 13, 2024, we appealed the verdict as well as the U.S. District Court's November 2020 dismissal of our patent infringement claims against BASF. Oral arguments on the appeals are scheduled for December 5, 2025 and final resolution could take up to 6 months. Ingevity believes in the strength of its intellectual property and the merits of its position and intends to pursue all legal relief available to challenge these outcomes in the Delaware Proceeding. As of September 30, 2025, nothing has occurred in the post-trial proceedings to warrant any change to our conclusions as disclosed within our Annual Report on Form 10-K for the year ended December 31, 2024. The full amount of the trebled jury's verdict, $85.0 million, is accrued in "Accrued expenses" on the condensed consolidated balance sheets as of September 30, 2025 and the charge was included within "Other (income) expense, net" on the consolidated statements of operations for the year ended December 31, 2021. In addition, as a result of the judgment being entered on May 18, 2023, we have started accruing for post-judgment interest at the legally mandated interest rate. We expect that final resolution of these appeals will be complete within twelve months of the balance sheet date and, as a result, have reclassified the full amount of the verdict and post-judgment interest accrued to "Current liabilities." As of September 30, 2025 and December 31, 2024, the total amount accrued, inclusive of post-judgement interest, was $94.4 million and $91.4 million, respectively. The amount of any liability we may ultimately incur could be more or less than the amount accrued.

Ingevity Corp 10-Q