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Commitments and Contingencies | 12 Months Ended
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Sep. 30, 2025
Commitments and Contingencies Disclosure [Abstract] |
Commitments and Contingencies | Note S. Commitments and Contingencies Other Long-Term Commitments Cabot has entered into long-term purchase agreements primarily for the purchase of raw materials. Under certain of these agreements, the quantity of material being purchased is fixed, but the price paid changes as market prices change. Raw materials purchased under these agreements were $262 million, $280 million and $370 million during fiscal 2025, 2024 and 2023, respectively. Included in those raw materials purchased are purchases from noncontrolling shareholders of consolidated subsidiaries of $124 million, $138 million and $192 million during fiscal 2025, 2024 and 2023, respectively. Accounts payable and accrued liabilities owed to noncontrolling shareholders as of September 30, 2025 and 2024, were $8 million and $12 million, respectively. For these purchase commitments, the amounts included in the table below are based on market prices as of September 30, 2025 which may differ from actual market prices at the time of purchase. The Company has also entered into long-term purchase agreements primarily for services related to information technology, which are included in Other in the table below.
|  | Payments Due by Fiscal Year |
|  | 2026 |  |  | 2027 |  |  | 2028 |  |  | 2029 |  |  | 2030 |  |  | Thereafter |  |  | Total |
|  | (In millions) |
Reinforcement Materials |  | $ | 167 |  |  | $ | 127 |  |  | $ | 95 |  |  | $ | 84 |  |  | $ | 84 |  |  | $ | 870 |  |  | $ | 1,427 |
Performance Chemicals |  |  | 37 |  |  |  | 34 |  |  |  | 21 |  |  |  | 16 |  |  |  | 15 |  |  |  | 166 |  |  | $ | 289 |
Other |  |  | 12 |  |  |  | 9 |  |  |  | 4 |  |  |  | 2 |  |  |  | 1 |  |  |  | 1 |  |  | $ | 29 |
Total |  | $ | 216 |  |  | $ | 170 |  |  | $ | 120 |  |  | $ | 102 |  |  | $ | 100 |  |  | $ | 1,037 |  |  | $ | 1,745 |
Guarantee Agreements Cabot has provided certain indemnities pursuant to which it may be required to make payments to an indemnified party in connection with certain transactions and agreements. In connection with certain acquisitions and divestitures, Cabot has provided routine indemnities with respect to such matters as environmental, tax, insurance, product and employee liabilities. In connection with various other agreements, including service and supply agreements with customers, Cabot has provided indemnities for certain contingencies and routine warranties. Cabot is unable to estimate the maximum potential liability for these types of indemnities as a maximum obligation is not explicitly stated in most cases and the amounts, if any, are dependent upon the outcome of future contingent events, the nature and likelihood of which cannot be reasonably estimated. The duration of the indemnities varies, and in many cases are indefinite. Cabot has not recorded any liability for these indemnities in the consolidated financial statements, except as otherwise disclosed. Self-Insurance and Retention for Certain Contingencies The Company is partially self-insured for certain third-party liabilities globally, as well as workers’ compensation and employee medical benefits in the United States. The third-party and workers’ compensation liabilities are managed through a wholly-owned insurance captive and the related liabilities are included in the consolidated financial statements. The employee medical obligations are managed by a third-party provider and the related liabilities are included in the consolidated financial statements. To limit Cabot’s potential liabilities for these risks, however, the Company purchases insurance from third parties that provides stop-loss protection. The self-insured liability in fiscal 2025 for third-party liabilities was $500,000 per accident for auto, $2 million per occurrence for all other, $1 million per accident for U.S. workers’ compensation, and the retention for medical costs in the United States is at most $300,000 per person per annum. Contingencies Cabot is a defendant, or potentially responsible party, in various lawsuits and environmental proceedings wherein substantial amounts are claimed or at issue. Environmental Matters As of both September 30, 2025 and 2024, Cabot had $5 million reserved for environmental matters, almost all of which is for operation and maintenance work, and is included in Accounts payable and accrued liabilities and Other liabilities in the Consolidated Balance sheets. These environmental matters mainly relate to former operations. The Company’s reserves for environmental matters represent Cabot’s best estimates of the probable costs to be incurred at those sites where costs are reasonably estimable based on the Company’s analysis of the extent of clean up required, alternative clean-up methods available, abilities of other responsible parties to contribute and its interpretation of laws and regulations applicable to each site. Cabot reviews the adequacy of the reserves as circumstances change at individual sites and adjusts the reserves as appropriate. Almost all of Cabot’s environmental issues relate to sites that are mature and have been investigated and studied and, in many cases, are subject to agreed upon remediation plans. However, depending on the results of future testing, changes in risk assessment practices, remediation techniques and regulatory requirements, newly discovered conditions, and other factors, it is reasonably possible that the Company could incur additional costs in excess of environmental reserves currently recorded. Management estimates, based on the latest available information, that any such future environmental remediation costs that are reasonably possible to be in excess of amounts already recorded would be immaterial to the Company’s consolidated financial statements. Charges for environmental expenses were $1 million in each of fiscal 2025, 2024 and 2023, and are included in Cost of sal es in the Consolidated Statements of Operations. Cash payments related to these environmental matters were $1 million in each of fiscal 2025, 2024 and 2023. The Company anticipates that expenditures related to these environmental matters will be made over a number of years. In November 2013, Cabot entered into a Consent Decree with the EPA and the Louisiana Department of Environmental Quality (“LDEQ”) regarding Cabot’s three carbon black manufacturing facilities in the U.S. This settlement is related to EPA’s national enforcement initiative focused on the U.S. carbon black manufacturing sector alleging non-compliance with certain regulatory and permitting requirements under The Clean Air Act, including the New Source Review (“NSR”) construction permitting requirements. Pursuant to this settlement, Cabot has installed technology controls for the reduction of sulfur dioxide and nitrogen oxide emissions at two of its plants and is in the process of installing these controls at the third plant. Cabot is currently in discussions with the EPA and LDEQ to extend its compliance date at the third plant. In addition, under the Province of Ontario Ministry of Environment, Conservation and Parks’ (“MECP”) Regulation 419, a new requirement for sulfur dioxide (“SO2”) emissions went into effect on July 1, 2023 for Cabot’s reinforcing carbons plant in Sarnia, Ontario. Cabot is out of compliance with this new air standard, and under the terms of the current abatement plan the Company has in place with the MECP regarding this requirement, Cabot is required to install air pollution controls at the plant by July 1, 2028, with specified milestones before that date. To date, Cabot’s ability to operate its reinforcing carbons plant in Sarnia has not been restricted as the Company is working with MECP on a solution. Respirator Liabilities Cabot has exposure in connection with a safety respiratory products business that a subsidiary acquired from American Optical Corporation (“AO”) in an April 1990 asset purchase transaction. The subsidiary manufactured respirators under the AO brand and disposed of that business in July 1995. In connection with its acquisition of the business, the subsidiary agreed, in certain circumstances, to assume a portion of AO’s liabilities, including costs of legal fees together with amounts paid in settlements and judgments, allocable to AO respiratory products used prior to the 1990 purchase by the Cabot subsidiary. In exchange for the subsidiary’s assumption of certain of AO’s respirator liabilities, AO agreed to provide to the subsidiary the benefits of: (i) AO’s insurance coverage for the period prior to the 1990 acquisition and (ii) a former owner’s indemnity of AO holding it harmless from any liability allocable to AO respiratory products used prior to May 1982. Generally, these respirator liabilities involve claims for personal injury, including asbestosis, silicosis and coal worker’s pneumoconiosis (“CWP”), allegedly resulting from the use of respirators that are alleged to have been negligently designed and/or labeled. At no time did this respiratory product line represent a significant portion of the respirator market. The subsidiary transferred the business to Aearo Technologies (“Aearo”) in July 1995. Cabot agreed to have the subsidiary retain certain liabilities associated with exposure to asbestos and silica while using respirators prior to the 1995 transaction so long as Aearo paid, and continues to pay, Cabot an annual fee of $400,000. Aearo can discontinue payment of the fee at any time, in which case it will assume the responsibility for and indemnify Cabot against those liabilities which Cabot’s subsidiary had agreed to retain. The Company anticipates that it will continue to receive payment of the $400,000 fee from Aearo and thereby retain these liabilities for the foreseeable future. Cabot has no liability in connection with any products manufactured by Aearo after 1995. Because of the difficulty in determining when a particular respirator was manufactured, Aearo and Cabot have applied the retention of liabilities under the 1995 agreement to claims arising out of the alleged use of respirators involving exposure to asbestos, silica or silica products prior to January 1, 1997. In addition to Cabot’s subsidiary and as described above, other parties are responsible for significant portions of the costs of respirator liabilities, leaving Cabot’s subsidiary with a portion of the liability in only some of the pending cases. These parties include Aearo, AO, AO’s insurers, another former owner and its insurers and a third-party manufacturer of respirators formerly sold under the AO brand and its insurers (collectively, with the Company’s subsidiary, the “Payor Group”). Cabot has contributed to the Payor Group’s defense and settlement costs with respect to a percentage of pending claims depending on several factors, including the period of alleged product use. The methodology used to estimate the liability addresses the complexities surrounding Cabot’s potential liability by making assumptions about Cabot’s likely exposure based on various factors, including the Payor Group’s historical experience with these claims, the number of future claims and the cost to resolve pending and future claims. Using those and other assumptions, the Company estimates the costs that would be incurred in defending and resolving both currently pending and future claims. As of September 30, 2025 and 2024, the Company had $33 m illion and $35 million, respectively, reserved for its estimated share of liability for pending and future respirator claims and for defense costs, the majority of which the Company expects to incur over the next ten years. The reserve is included in Other liabilities and Accounts payable and accrued liabilities on the Consolidated Balance Sheets. In fiscal 2025, 2024 and 2023, the Company recorded a charge of nil, nil and $8 million, respectively, related to the respirator liability which was included in Selling and administrative expense in the Consolidated Statements of Operations. The Company made payments related to its respirator liability of $2 million, $3 million and $9 million in fiscal 2025, 2024 and 2023, respectively. The Company’s current estimate of the cost of its share of pending and future respirator liability claims is based on facts and circumstances existing at this time, including the number and nature of the remaining claims. Developments that could affect the Company’s estimate include, but are not limited to, (i) significant changes in the number of future claims, (ii) changes in the rate of dismissals without payment of pending claims, (iii) significant changes in the average cost of resolving claims, including potential settlements of groups of claims, (iv) significant changes in the legal costs of defending these claims, (v) changes in the nature of claims received or changes in the Company’s assessment of the viability of these claims, (vi) trial and appellate outcomes, (vii) changes in the law and procedure applicable to these claims, (viii) the financial viability of the parties that contribute to the payment of respirator claims, (ix) exhaustion or changes in the recoverability of the insurance coverage maintained by certain members of the Payor Group, or a change in the availability of the indemnity provided by a former owner of AO, (x) changes in the allocation of costs among the various parties paying legal and settlement costs, and (xi) a determination that the assumptions that were used to estimate Cabot’s share of liability are no longer reasonable. The Company cannot determine the impact of these potential developments on its current estimate of its share of liability for existing and future claims. Because reserves are limited to amounts that are probable and estimable as of a relevant measurement date, and there is inherent difficulty in projecting the impact of potential developments on Cabot’s share of liability for these existing and future claims, it is reasonably possible that the liabilities for existing and future claims could change in the near term and that change could be material. Other Matters The Company has various other lawsuits, claims and contingent liabilities arising in the ordinary course of its business and with respect to its divested businesses. The Company does not believe that any of these matters will have a material adverse effect on its financial position; however, litigation is inherently unpredictable. Cabot could incur judgments, enter into settlements or revise its expectations regarding the outcome of certain matters, and such developments could have a material impact on its results of operations in the period in which the amounts are accrued or its cash flows in the period in which the amounts are paid. The Company is subject to indirect tax audits in jurisdictions where it has business operations. In 2025, Cabot recognized a $7 million indirect tax settlement which is presented in Other Income (Expense) in the Consolidated Statements of Operations. Cabot’s exposure from indirect tax audits is not expected to be material.

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