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Note 17 - Receivables and prepayments, net - Summary of Receivables and Prepayments (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure of other provisions [line items] |  |  |  |
Prepaid expenses and other receivables |  | $ 44,258 | $ 53,318 |
Government entities |  | 3,118 | 2,420 |
Employee advances and loans |  | 10,441 | 11,695 |
Advances to suppliers and other advances |  | 41,906 | 35,965 |
Government tax refunds on exports |  | 14,826 | 16,969 |
Receivables from related parties | [1] | 75,507 | 3,585 |
Others | [2] | 82,546 | 58,756 |
Receivables and prepayments, gross |  | 272,602 | 182,708 |
Current prepayments and other current assets |  | 268,798 | 179,614 |
Allowance for other doubtful accounts - other receivables [member] |  |  |  |
Disclosure of other provisions [line items] |  |  |  |
Allowance for other doubtful accounts, see note 25 (i) |  | $ (3,804) | $ (3,094) | $ (3,439)
[1] | As of December 31, 2025, i ncluded approximately $68.8 million, related to a receivable from loans granted to Techgen, reclassified from non-current receivables. For more information, see note 14 (c).
[2] | As of December 31, 2025, i ncluded approximately $27 million, related to a receivable corresponding to the refunds from the adjustment of the U.S. antidumping duty rate on Tenaris’s imports from Argentina for the first review period. For more information, see note 27 (ii).

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- Definition The amount of current receivables from taxes other than income tax. [Refer: Receivables from taxes other than income tax] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 78 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_78_b&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition The amount of current other receivables. [Refer: Other receivables] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph B9 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_B9_b&doctype=Appendix&subtype=B -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 78 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_78_b&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition The amount of employee advances and loans that are attributable to current receivables and prepayments. + References No definition available. + Details
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