Company: SUZ
Filing Date: 2025-11-06
Form Type: 6-K
Source: 0000909327-25-000055
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Company: Suzano S.A.
Filing Date: 2025-11-06
Form: 6-K
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<div align='center'>UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549</div>

#### FORM 6-K
<div align='center'>REPORT OF FOREIGN PRIVATE ISSUER
PURSUANT TO RULE 13a-16 OR 15d-16
UNDER THE SECURITIES EXCHANGE ACT OF 1934</div>

#### For the month of November, 2025.

#### Commission File Number 001-38755
<div align='center'>Suzano S.A. (Exact name of registrant as specified in its charter)

SUZANO INC. (Translation of Registrant’s Name into English)

Av. Professor Magalhaes Neto, 1,752
10th Floor, Rooms 1010 and 1011
Salvador, Brazil 41 810-012 (Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.
Form 20-F ☑ Form 40-F ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ☐</div>

#### INCORPORATION BY REFERENCE
This report is incorporated by reference in our registration statements on Form F-3 filed with the U.S. Securities and Exchange Commission on April 30, 2025 (File No. 333-286881, 333-286881-01 and 333-286881-02) , and shall be deemed to be a part thereof from the date on which this report is furnished to the SEC, to the extent not superseded by documents or reports subsequently filed or furnished.

| Suzano S.A. |

INDEX

| CONSOLIDATED BALANCE SHEET                                        |     |  1 |
| CONSOLIDATED STATEMENTS OF INCOME (LOSS)                          |     |  3 |
| CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)            |     |  4 |
| CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY                      |     |  5 |
| CONSOLIDATED STATEMENTS OF CASH FLOW                              |     |  6 |
|