v3.25.3
Segment Information - Schedule of Operating Segments (Details) - EUR (€)
€ in Thousands
 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2023
Disclosure of operating segments [line items]      
Cost of sales € (857,723) € (744,013) € (566,118)
Foreign exchange loss (1,953) (19,641) (36,056)
IPO-related costs   (7,460) (30,603)
Share-based compensation expenses   (3,591) (65,393)
Secondary offering related costs (1,695) (1,890)  
Acquisition-related transaction costs (259)    
Other     (6,553)
EBITDA 663,083 522,373 344,101
Depreciation and amortization (113,539) (101,291) (83,413)
Finance cost, net (79,564) (127,300) (107,036)
Profit before tax 469,980 293,782 153,652
Total Reportable Segments      
Disclosure of operating segments [line items]      
Sales 2,092,730 1,800,408 1,486,621
Cost of sales 855,827 (743,501) (563,517)
Adjusted EBITDA 701,531 585,304 503,607
Total Reportable Segments | Americas      
Disclosure of operating segments [line items]      
Sales 1,085,672 943,710 804,690
Cost of sales (452,646) (388,860) (273,278)
Adjusted EBITDA 358,934 301,266 291,712
Total Reportable Segments | EMEA      
Disclosure of operating segments [line items]      
Sales 785,230 687,891 561,805
Cost of sales (307,918) (279,557) (234,196)
Adjusted EBITDA 272,985 230,840 175,526
Total Reportable Segments | APAC      
Disclosure of operating segments [line items]      
Sales 221,828 168,807 120,126
Cost of sales (95,263) (75,084) (56,043)
Adjusted EBITDA 69,612 53,198 36,369
Corporate / Other      
Disclosure of operating segments [line items]      
Adjusted EBITDA € (34,541) € (30,349) € (20,901)