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Property, plant and equipment - Summary of Impairment (Details) - EUR (€) € in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Impairment loss | € 5,026 | € 3,233 | € 915
Impairment loss related to right-of-use assets | 9,941 | 7,905 | 832
Intangible asset impairment | 72 | 58 | 35
Zegna segment |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Property, plant and equipment, Impairment | 1,671 | 688 | 595
Reversal of impairment loss related to property, plant and equipment |  |  | (44)
Impairment loss |  |  | 551
Right-of-use assets, Impairment | 2,450 | 3,404 | 268
Reversal of impairment loss recognized in right of use asset |  |  | 0
Impairment loss related to right-of-use assets |  |  | 268
Right-of-use assets, Impairment | 8 | 58 | 37
Reversal of impairment loss recognised in profit or loss, intangible assets other than goodwill |  |  | (2)
Intangible asset impairment |  |  | 35
Thom Browne segment |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Property, plant and equipment, Impairment | 251 | 752 | 18
Right-of-use assets, Impairment | 244 | 2,205 | 0
Right-of-use assets, Impairment | 0 | 0 | 0
Tom Ford Fashion segment |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Property, plant and equipment, Impairment | 3,104 | 1,793 | 346
Right-of-use assets, Impairment | 7,247 | 2,296 | 564
Right-of-use assets, Impairment | € 64 | € 0 | € 0

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