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Shareholders equity | 9 Months Ended
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Sep. 30, 2025
Disclosure of classes of share capital [abstract] |
Disclosure of share capital, reserves and other equity interest [text block] | 24 SHAREHOLDERS’ EQUITY 24.1 Share capital On September 30, 2025, Suzano’s share capital was R$19,269,281 divided into 1,264,117,615 common shares, all nominative, book-entry shares without par value. Expenses related to the public offering were R$33,735, totaling a net share capital of R$19,235,546. The breakdown of the share capital is as set out below:
|  | 09/30/2025 |  | 12/31/2024
|  | Quantity |  | (%) |  | Quantity |  | (%)
Controlling Shareholders |  |  |  |  |  |  |  |
Suzano Holding S.A. |  | 367,612,329 |  |  | 29.08 |  |  | 367,612,329 |  | 29.08 |
Controller |  | 196,065,636 |  |  | 15.51 |  |  | 196,065,636 |  | 15.51 |
Managements and related persons |  | 32,155,608 |  |  | 2.54 |  |  | 32,784,440 |  | 2.59 |
Alden Fundo de Investimento em Ações |  | 27,154,744 |  |  | 2.15 |  |  | 26,154,744 |  | 2.07 |
|  | 622,988,317 |  |  | 49.28 |  |  | 622,617,149 |  | 49.25 |
Treasury (Note 24.2) |  | 28,208,827 |  |  | 2.23 |  |  | 24,875,787 |  | 1.97 |
Other shareholders |  | 612,920,471 |  |  | 48.49 |  |  | 616,624,679 |  | 48.78 |
|  | 1,264,117,615 |  |  | 100.00 |  |  | 1,264,117,615 |  | 100.00 |
On September 30, 2025, SUZB3 common shares ended the period quoted at R$49.90 and R$61.78 on December 31, 2024. 24.2 Treasury shares On September 30, 2025, the Company had 28,208,827 (24,875,787 as of December 31, 2024) of its own common shares held in treasury, with an average cost of R$53.57 per share, with a historical value of R$1,511,146 (R$1,339,197 as at December 31, 2024) and the market corresponding to R$1,407,620 (R$1,536,826 as at December 31, 2024). For the nine-month period ended September 30, 2025, the Company granted 372,160 common shares at an average cost of R$53.66 per share, with a historical value of R$19,969, to comply with the restricted shares plan (Note 22.2).
|  | Quantity |  | Average cost per share |  | Historical value |  | Market value
Balances at December 31, 2023 |  | 34,765,600 |  |  | 42.69 |  |  | 1,484,014 |  |  | 1,934,010 |
Exercised |  | (1,005,113) |  |  | 47.55 |  |  | (47,794) |  |  | (54,213) |
Repurchase |  | 51,115,300 |  |  | 54.91 |  |  | 2,806,764 |  |  | 2,806,764 |
Canceled |  | (60,000,000) |  |  | 48.40 |  |  | (2,903,787) |  |  | (3,238,200) |
Balances at December 31, 2024 |  | 24,875,787 |  |  | 53.84 |  |  | 1,339,197 |  |  | 1,536,826 |
Exercised |  | (372,160) |  |  | 53.66 |  |  | (19,969) |  |  | (20,251) |
Repurchase |  | 3,705,200 |  |  | 51.80 |  |  | 191,918 |  |  | 191,918 |
Balances at September 30, 2025 |  | 28,208,827 |  |  | 53.57 |  |  | 1,511,146 |  |  | 1,407,620 |

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- Definition The entire disclosure for share capital, reserves and other equity interest. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph B10 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_B10&doctype=Appendix&subtype=B -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 160 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_160&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 79 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_79&doctype=Standard -URIDate 2025-03-27 + Details
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