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Note 12 - Intangible assets, net - Intangible Assets and Goodwill (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |
At the beginning of the year |  | $ 1,357,749 | $ 1,377,110
Movements of the year |  |  |
Currency translation adjustment |  | 1,026 | (358)
Increase due to business combinations | [1] | 1,324 |
Changes due to business combinations | [2] |  | (28,211)
Additions |  | 48,762 | 58,443
Transfers / Reclassifications |  | (906) | 4,546
Disposals |  | (15) | (31)
Amortization charge |  | (50,824) | (53,750)
Movements of the year |  | (633) | (19,361)
At the end of the year |  | 1,357,116 | 1,357,749
Information system projects [member] |  |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |
At the beginning of the year |  | 97,106 | 72,165
Movements of the year |  |  |
Currency translation adjustment |  | 880 | (285)
Increase due to business combinations | [1] |  |
Changes due to business combinations | [2] |  |
Additions |  | 37,449 | 43,445
Transfers / Reclassifications |  | (906) | 4,476
Disposals |  | (15) | (31)
Amortization charge |  | (30,036) | (22,664)
Movements of the year |  | 7,372 | 24,941
At the end of the year |  | 104,478 | 97,106
Licenses, patents and trademarks [member] |  |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |
At the beginning of the year | [3] | 159,296 | 153,332
Movements of the year |  |  |
Currency translation adjustment | [3] | 7 | (4)
Increase due to business combinations | [1],[3] |  |
Changes due to business combinations | [2],[3] |  |
Additions | [3] | 11,313 | 14,998
Transfers / Reclassifications | [3] |  | 70
Disposals | [3] |  |
Amortization charge | [3] | (9,460) | (9,100)
Movements of the year | [3] | 1,860 | 5,964
At the end of the year | [3] | 161,156 | 159,296
Goodwill [member] |  |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |
At the beginning of the year |  | 1,090,019 | 1,103,707
Movements of the year |  |  |
Currency translation adjustment |  | 139 | (67)
Increase due to business combinations | [1] | 1,324 |
Changes due to business combinations | [2] |  | (13,621)
Additions |  |  |
Transfers / Reclassifications |  |  |
Disposals |  |  |
Amortization charge |  |  |
Movements of the year |  | 1,463 | (13,688)
At the end of the year |  | 1,091,482 | 1,090,019
Customer-related intangible assets [member] |  |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |
At the beginning of the year |  | 11,328 | 47,906
Movements of the year |  |  |
Currency translation adjustment |  |  | (2)
Increase due to business combinations | [1] |  |
Changes due to business combinations | [2] |  | (14,590)
Additions |  |  |
Transfers / Reclassifications |  |  |
Disposals |  |  |
Amortization charge |  | (11,328) | (21,986)
Movements of the year |  | (11,328) | (36,578)
At the end of the year |  |  | 11,328
Gross carrying amount [member] |  |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |
At the beginning of the year |  | 5,487,942 | 5,488,497
Movements of the year |  |  |
At the end of the year |  | 5,531,425 | 5,487,942
Gross carrying amount [member] | Information system projects [member] |  |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |
At the beginning of the year |  | 661,605 | 648,887
Movements of the year |  |  |
At the end of the year |  | 692,274 | 661,605
Gross carrying amount [member] | Licenses, patents and trademarks [member] |  |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |
At the beginning of the year | [3] | 575,607 | 560,549
Movements of the year |  |  |
At the end of the year | [3] | 586,938 | 575,607
Gross carrying amount [member] | Goodwill [member] |  |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |
At the beginning of the year |  | 2,474,693 | 2,488,381
Movements of the year |  |  |
At the end of the year |  | 2,476,156 | 2,474,693
Gross carrying amount [member] | Customer-related intangible assets [member] |  |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |
At the beginning of the year |  | 1,776,037 | 1,790,680
Movements of the year |  |  |
At the end of the year |  | 1,776,057 | 1,776,037
Accumulated depreciation, amortisation and impairment [member] |  |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |
At the beginning of the year |  | (4,130,193) | (4,111,387)
Movements of the year |  |  |
At the end of the year |  | (4,174,309) | (4,130,193)
Accumulated depreciation, amortisation and impairment [member] | Information system projects [member] |  |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |
At the beginning of the year |  | (564,499) | (576,722)
Movements of the year |  |  |
At the end of the year |  | (587,796) | (564,499)
Accumulated depreciation, amortisation and impairment [member] | Licenses, patents and trademarks [member] |  |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |
At the beginning of the year | [3] | (416,311) | (407,217)
Movements of the year |  |  |
At the end of the year | [3] | (425,782) | (416,311)
Accumulated depreciation, amortisation and impairment [member] | Goodwill [member] |  |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |
At the beginning of the year |  | (1,384,674) | (1,384,674)
Movements of the year |  |  |
At the end of the year |  | (1,384,674) | (1,384,674)
Accumulated depreciation, amortisation and impairment [member] | Customer-related intangible assets [member] |  |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |  |
At the beginning of the year |  | (1,764,709) | (1,742,774)
Movements of the year |  |  |
At the end of the year |  | $ (1,776,057) | $ (1,764,709)
[1] | For the year 2025, related to the acquisition of a scrap processing business in Beaver Falls, Pennsylvania. For more information see note 34.
[2] | For the year 2024, related to Mattr’s pipe coating business unit acquisition.
[3] | Includes Proprietary Technology.

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