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Derivatives | 12 Months Ended
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Sep. 30, 2025
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Derivatives | Note J. Derivatives The Company has foreign currency exposure arising from its net investments in foreign operations. The Company uses cross-currency swaps to partially mitigate the impact of the Euro currency rate changes on the Company’s Euro-denominated net investments. The Company’s cross-currency swaps are designated as net investment hedges. The Company also has foreign currency exposure arising from the denomination of monetary assets and liabilities in foreign currencies other than the functional currency of a given subsidiary as well as the risk that currency fluctuations could affect the dollar value of future cash flows generated in foreign currencies. The Company uses short-term forward contracts to minimize the exposure to foreign currency risk. By using derivative instruments, the Company is subject to credit and market risk. If a counterparty fails to fulfill its performance obligations under a derivative contract, the Company’s credit risk will equal the fair value of the derivative. The Company minimizes counterparty credit (or repayment) risk by entering into transactions with major financial institutions of investment grade credit rating. The Company’s exposure to market risk is not hedged in a manner that completely eliminates the effects of changing market conditions on earnings or cash flow. The Company had no significant concentration of credit risk at September 30, 2025 and 2024. The following table provides details of the derivatives held as of September 30, 2025 and 2024 to manage foreign currency risk.
|  |  |  | Notional Amount |  |
Description |  | Borrowing |  | September 30, 2025 |  | September 30, 2024 |  | Hedge Designation
Cross Currency Swaps |  | 3.4% Notes |  | USD 250 million swapped to EUR 223 million |  | USD 250 million swapped to EUR 223 million |  | Net investment
Forward Foreign Currency Contracts(1) |  | N/A |  | USD 184 million |  | USD 138 million |  | No designation
(1) At September 30, 2025, the Company’s forward foreign exchange contracts were denominated in Euro, Indonesian rupiah, Czech koruna, and Colombian peso. At September 30, 2024, the Company’s forward foreign exchange contracts were denominated in Indonesian rupiah, Czech koruna, and Colombian peso. Accounting for Derivative Instruments and Hedging Activities Net Investment Hedge For net investment hedges, changes in the fair value of the effective portion of the derivatives’ gains or losses are reported as CTA in AOCI while changes in the ineffective portion are reported in earnings. Effectiveness is assessed based on the hypothetical derivative method. The gains or losses on derivative instruments reported in AOCI are reclassified to earnings in the period in which earnings are affected by the underlying item, such as disposals or substantial liquidations of the entities being hedged. Cash settlements related to the net investment hedge occur semi-annually on March 15 th and September 15 th for fixed rate interest payments and a cash exchange of the notional currency amount will occur at the end of the term in September 2026. During each of fiscal 2025, 2024 and 2023, the Company received net cash interest of $4 million. As of September 30, 2025, the fair value of these swaps was a liability of $12 million and was included in Prepaid expenses and other current assets and Other liabilities. As of September 30, 2024, the fair value of these swaps was an asset of $1 million and was included in Prepaid expenses and other current assets and Other assets. As of September 30, 2025 and 2024, the cumulative unrealized loss of $8 million and the cumulative unrealized gain of $5 m illion, respectively, was included in AOCI on the Consolidated Balance Sheets. The following table summarizes the impact of the cross-currency swaps, net of tax, to AOCI and the Consolidated Statements of Operations:
|  | Years Ended September 30 |
|  | 2025 |  |  | 2024 |  |  | 2023 |
|  | (In millions) |
Gain/(loss) recognized in AOCI |  | $ | (8 | ) |  | $ | (6 | ) |  | $ | (13 | )
(Gain)/loss reclassified from AOCI into Interest expense |  | $ | (4 | ) |  | $ | (4 | ) |  | $ | (6 | )
(Gain)/loss recognized in Interest expense (amount excluded from effectiveness testing) |  | $ | 2 |  |  | $ | 2 |  |  | $ | 2 |
Forward Foreign Currency Contracts At both September 30, 2025 and 2024, the Company had foreign currency forward contracts that were not designated as hedges for accounting purposes. Although these derivatives do not qualify for hedge accounting, Cabot believes that such instruments are closely correlated with the underlying exposure, thus managing the associated risk. The gains or losses from changes in the fair value of derivative instruments that are not accounted for as hedges are recognized in current period earnings. At both September 30, 2025 and 2024, the fair value of derivative instruments not designated as hedges was less than $1 million and was presented in Prepaid expenses and other current assets and Accounts payable and accrued liabilities on the Consolidated Balance Sheets.

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