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Consolidated Statements of Stockholder's Equity - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive Loss
--- | --- | --- | --- | --- | ---
Beginning balance at Sep. 30, 2022 | $ 2,296,034 | $ 1,175 | $ 1,720,580 | $ 727,737 | $ (153,458)
Beginning balance (in shares) at Sep. 30, 2022 |  | 117,472,000 |  |  |
Common stock issued for employee stock-based awards | 0 | $ 18 | (18) |  |
Common stock issued for employee stock-based awards (in shares) |  | 1,798,000 |  |  |
Shares surrendered by employees to pay taxes related to stock-based awards | (82,768) | $ (7) | (82,761) |  |
Shares surrendered by employees to pay taxes related to stock-based awards (in shares) |  | (620,000) |  |  |
Common stock issued for employee stock purchase plan | 21,652 | $ 2 | 21,650 |  |
Common stock issued for employee stock purchase plan (in shares) |  | 196,000 |  |  |
Compensation expense from stock-based awards | 161,454 |  | 161,454 |  |
Net income | $ 245,540 |  |  | 245,540 |
Repurchases of common stock (in shares) | 0 |  |  |  |
Loss on net investment hedges, net of tax | $ (7,516) |  |  |  | (7,516)
Foreign currency translation adjustment | 45,692 |  |  |  | 45,692
Change in defined benefit pension items, net of tax | (2,798) |  |  |  | (2,798)
Ending balance at Sep. 30, 2023 | 2,677,290 | $ 1,188 | 1,820,905 | 973,277 | (118,080)
Ending balance (in shares) at Sep. 30, 2023 |  | 118,846,000 |  |  |
Common stock issued for employee stock-based awards | 0 | $ 18 | (18) |  |
Common stock issued for employee stock-based awards (in shares) |  | 1,733,000 |  |  |
Shares surrendered by employees to pay taxes related to stock-based awards | (101,924) | $ (6) | (101,918) |  |
Shares surrendered by employees to pay taxes related to stock-based awards (in shares) |  | (612,000) |  |  |
Common stock issued for employee stock purchase plan | 25,674 | $ 2 | 25,672 |  |
Common stock issued for employee stock purchase plan (in shares) |  | 188,000 |  |  |
Compensation expense from stock-based awards | 220,666 |  | 220,666 |  |
Net income | $ 376,333 |  |  | 376,333 |
Repurchases of common stock (in shares) | 0 |  |  |  |
Loss on net investment hedges, net of tax | $ (16,315) |  |  |  | (16,315)
Foreign currency translation adjustment | 36,465 |  |  |  | 36,465
Change in defined benefit pension items, net of tax | (3,791) |  |  |  | (3,791)
Ending balance at Sep. 30, 2024 | $ 3,214,398 | $ 1,202 | 1,965,307 | 1,349,610 | (101,721)
Ending balance (in shares) at Sep. 30, 2024 | 120,155,000 | 120,155,000 |  |  |
Common stock issued for employee stock-based awards | $ 0 | $ 13 | (13) |  |
Common stock issued for employee stock-based awards (in shares) |  | 1,300,000 |  |  |
Shares surrendered by employees to pay taxes related to stock-based awards | (80,355) | $ (5) | (80,350) |  |
Shares surrendered by employees to pay taxes related to stock-based awards (in shares) |  | (439,000) |  |  |
Common stock issued for employee stock purchase plan | 26,062 | $ 2 | 26,060 |  |
Common stock issued for employee stock purchase plan (in shares) |  | 166,000 |  |  |
Compensation expense from stock-based awards | 212,659 |  | 212,659 |  |
Net income | 733,997 |  |  | 733,997 |
Repurchases of common stock | $ (301,090) | $ (17) | (301,073) |  |
Repurchases of common stock (in shares) | (1,650,000) | (1,646,000) |  |  |
Loss on net investment hedges, net of tax | $ (17,863) |  |  |  | (17,863)
Foreign currency translation adjustment | 37,334 |  |  |  | 37,334
Change in defined benefit pension items, net of tax | 1,087 |  |  |  | 1,087
Ending balance at Sep. 30, 2025 | $ 3,826,229 | $ 1,195 | $ 1,822,590 | $ 2,083,607 | $ (81,163)
Ending balance (in shares) at Sep. 30, 2025 | 119,536,000 | 119,536,000 |  |  |

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