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v3.25.3

Income Taxes (Tables) | 12 Months Ended
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Sep. 30, 2025
Income Tax Disclosure [Abstract] |
Summary of Income Before Income Taxes | Our Income before income taxes consisted of the following:
(in thousands) |  | Year ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2023 |
Domestic |  | $ | 418,265 |  |  | $ | 43,504 |  |  | $ | (49,193 | )
Foreign |  |  | 501,912 |  |  |  | 425,458 |  |  |  | 381,759 |
Total income before income taxes |  | $ | 920,177 |  |  | $ | 468,962 |  |  | $ | 332,566 |
Schedule of Provision For Income Taxes | Our Provision for income taxes consisted of the following:
(in thousands) |  | Year ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2023 |
Current: |  |  |  |  |  |  |  |  |
Federal |  | $ | 128,230 |  |  | $ | 44,642 |  |  | $ | 7,311 |
State |  |  | 21,754 |  |  |  | 25,359 |  |  |  | 10,020 |
Foreign |  |  | 62,479 |  |  |  | 61,668 |  |  |  | 53,019 |
|  |  | 212,463 |  |  |  | 131,669 |  |  |  | 70,350 |
Deferred: |  |  |  |  |  |  |  |  |
Federal |  |  | (43,333 | ) |  |  | (60,378 | ) |  |  | (11,821 | )
State |  |  | (15,630 | ) |  |  | (7,387 | ) |  |  | (10,028 | )
Foreign |  |  | 32,680 |  |  |  | 28,725 |  |  |  | 38,525 |
|  |  | (26,283 | ) |  |  | (39,040 | ) |  |  | 16,676 |
Provision for income taxes |  | $ | 186,180 |  |  | $ | 92,629 |  |  | $ | 87,026 |
Summary of Federal Income Tax Rate and Effective Income Tax Rate | Taxes computed at the statutory federal income tax rates are reconciled to the Provision for income taxes as follows:
(in thousands) |  | Year ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2023 |
Statutory federal income tax rate |  | $ | 193,237 |  |  |  | 21 | % |  | $ | 98,482 |  |  |  | 21 | % |  | $ | 69,839 |  |  |  | 21 | %
State income taxes, net of federal tax benefit |  |  | 6,124 |  |  |  | 1 | % |  |  | 4,631 |  |  |  | 1 | % |  |  | 577 |  |  |  | 0 | %
Federal research and development credits |  |  | (8,552 | ) |  |  | (1 | )% |  |  | (11,203 | ) |  |  | (2 | )% |  |  | (7,751 | ) |  |  | (2 | )%
Uncertain tax positions |  |  | (1,904 | ) |  |  | — |  |  |  | 7,268 |  |  |  | 2 | % |  |  | 23,302 |  |  |  | 7 | %
Foreign tax credit |  |  | (14,410 | ) |  |  | (2 | )% |  |  | (30,119 | ) |  |  | (7 | )% |  |  | (11,415 | ) |  |  | (3 | )%
Foreign rate differences |  |  | (12,135 | ) |  |  | (1 | )% |  |  | (15,368 | ) |  |  | (3 | )% |  |  | (20,829 | ) |  |  | (6 | )%
Foreign tax on U.S. provision |  |  | 14,452 |  |  |  | 2 | % |  |  | 15,120 |  |  |  | 3 | % |  |  | 11,415 |  |  |  | 3 | %
Excess tax benefits from restricted stock |  |  | (8,534 | ) |  |  | (1 | )% |  |  | (9,225 | ) |  |  | (2 | )% |  |  | (6,963 | ) |  |  | (2 | )%
U.S. permanent items |  |  | (920 | ) |  |  | — |  |  |  | 2,711 |  |  |  | 0 | % |  |  | 5,341 |  |  |  | 2 | %
Non-deductible compensation |  |  | 9,096 |  |  |  | 1 | % |  |  | 10,157 |  |  |  | 2 | % |  |  | 8,344 |  |  |  | 3 | %
Base Erosion Anti-Abuse Tax (BEAT) |  |  | 2,653 |  |  |  | — |  |  |  | 3,264 |  |  |  | 1 | % |  |  | — |  |  |  | — |
GILTI, net of foreign tax credits |  |  | 27,008 |  |  |  | 3 | % |  |  | 31,388 |  |  |  | 7 | % |  |  | 17,861 |  |  |  | 5 | %
Foreign-Derived Intangible Income (FDII) |  |  | (20,162 | ) |  |  | (2 | )% |  |  | (15,148 | ) |  |  | (3 | )% |  |  | (8,987 | ) |  |  | (3 | )%
Non-deductible imputed interest |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 6,292 |  |  |  | 2 | %
Other, net |  |  | 227 |  |  |  | (1 | )% |  |  | 671 |  |  |  | 0 | % |  |  | — |  |  |  | (1 | )%
Provision for income taxes |  | $ | 186,180 |  |  |  | 20 | % |  | $ | 92,629 |  |  |  | 20 | % |  | $ | 87,026 |  |  |  | 26 | %
Schedule of Deferred Tax Assets and Liabilities | The significant temporary differences that created deferred tax assets and liabilities are shown below:
(in thousands) |  | September 30, |
|  | 2025 |  |  | 2024 |
Deferred tax assets: |  |  |  |  |  |
Net operating loss carryforwards |  | $ | 12,074 |  |  | $ | 14,141 |
Foreign tax credits |  |  | 5,996 |  |  |  | 2,028 |
Capitalized research and development |  |  | 176,610 |  |  |  | 136,001 |
Pension benefits |  |  | 6,868 |  |  |  | 7,629 |
Prepaid expenses |  |  | 22,391 |  |  |  | 18,551 |
Deferred revenue |  |  | 2,970 |  |  |  | 2,607 |
Stock-based compensation |  |  | 23,514 |  |  |  | 22,231 |
Other reserves not currently deductible |  |  | 39,888 |  |  |  | 34,422 |
Amortization of intangible assets |  |  | 36,560 |  |  |  | 60,527 |
Research and development and other tax credits |  |  | 8,984 |  |  |  | 25,706 |
Lease liabilities |  |  | 43,650 |  |  |  | 46,460 |
Fixed assets |  |  | 114,109 |  |  |  | 106,741 |
Capital loss carryforward |  |  | 4,517 |  |  |  | 3,875 |
Other |  |  | 5,608 |  |  |  | 3,528 |
Gross deferred tax assets |  |  | 503,739 |  |  |  | 484,447 |
Valuation allowance |  |  | (8,529 | ) |  |  | (21,755 | )
Total deferred tax assets |  |  | 495,210 |  |  |  | 462,692 |
Deferred tax liabilities: |  |  |  |  |  |
Acquired intangible assets not deductible |  |  | (246,107 | ) |  |  | (257,731 | )
Lease assets |  |  | (29,298 | ) |  |  | (34,160 | )
Pension prepayments |  |  | (4,279 | ) |  |  | (3,283 | )
Deferred revenue |  |  | (10,212 | ) |  |  | (1,243 | )
Depreciation |  |  | (3,277 | ) |  |  | (4,683 | )
Deferred income |  |  | (14,518 | ) |  |  | (11,636 | )
Prepaid commissions |  |  | (14,479 | ) |  |  | (13,738 | )
Other |  |  | (9,120 | ) |  |  | (9,030 | )
Total deferred tax liabilities |  |  | (331,290 | ) |  |  | (335,504 | )
Net deferred tax assets |  | $ | 163,920 |  |  | $ | 127,188 |
Summary of Valuation Allowance | The changes to the valuation allowance were primarily due to the following:
(in thousands) |  | Year ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2023 |
Valuation allowance, beginning of year |  | $ | 21,755 |  |  | $ | 21,695 |  |  | $ | 22,283 |
Net increase (decrease) in deferred tax assets with a full valuation allowance |  |  | (13,226 | ) |  |  | 60 |  |  |  | (588 | )
Valuation allowance, end of year |  | $ | 8,529 |  |  | $ | 21,755 |  |  | $ | 21,695 |
Schedule of Unrecognized Tax Benefit |
|  | Year ended September 30, |
Unrecognized tax benefits (in thousands) |  | 2025 |  |  | 2024 |  |  | 2023 |
Unrecognized tax benefit, beginning of year |  | $ | 65,035 |  |  | $ | 50,742 |  |  | $ | 23,923 |
Tax positions related to current year: |  |  |  |  |  |  |  |  |
Additions |  |  | 14,736 |  |  |  | 7,570 |  |  |  | 7,075 |
Tax positions related to prior years: |  |  |  |  |  |  |  |  |
Additions |  |  | 104,375 |  |  |  | 10,705 |  |  |  | 20,855 |
Reductions |  |  | (9,669 | ) |  |  | (452 | ) |  |  | — |
Settlements |  |  | (16,753 | ) |  |  | (3,530 | ) |  |  | — |
Statute expirations |  |  | — |  |  |  | — |  |  |  | (1,111 | )
Unrecognized tax benefit, end of year |  | $ | 157,724 |  |  | $ | 65,035 |  |  | $ | 50,742 |
Summary of Income Tax Examinations Years | As of September 30, 2025, we remained subject to examination in the following major tax jurisdictions for the tax years indicated:
Major Tax Jurisdiction |  | Open Years
United States |  | 2022 through 2025
Germany |  | 2019 through 2025
France |  | 2023 through 2025
Japan |  | 2020 through 2025
Ireland |  | 2019 through 2025

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