6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of October, 2024.

Commission File Number 001-38755

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): ☐

Enclosures:

Exhibit 99.1 – Market Pulp Production in 2024

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: October 1st, 2024

Document

SUZANO S.A.

Publicly Held Company

Corporate Taxpayer ID (CNPJ/MF) No. 16.404.287/0001-55

Company Registry (NIRE) 29.3.0001633-1

MATERIAL FACT

São Paulo, October 3rd, 2024 – Suzano S.A. (“Company”) (B3: SUZB3 / NYSE: SUZ), in compliance with the provisions of Law No. 6,404, dated as of December 15, 1976, as amended (“Brazilian Corporate Law”), of the Brazilian Securities Commission (“CVM”) Resolution No. 80, dated as of March 29th, 2022, and of CVM Resolution No. 44, dated as of August 23rd, 2021, in line with corporate governance best practices hereby informs its shareholders and investors that the production volume of market pulp in 2024 by the Company will be lower by approximately 4% (four percent) when compared to its nominal production capacity (ex-Cerrado). The decision is based on the fact that this production volume would not bring adequate returns for the Company during a more complex pulp market period.

The Company also informs that the aforementioned change in its production volume will not impact the compliance with our obligations undertaken with clients, as well as suppliers.

It is worth noting that the operation of the Ribas do Rio Pardo Unit (previously called Cerrado Project) continues as expected and already announced to the market, with a production volume of 900 thousand tons remaining for the year 2024.

The estimates shown here merely reflect the current estimates or expectations of the Company's management, are subject to risks and uncertainties, and in no way constitute a promise of performance. These estimates represent forward-looking statements within the meaning of Section 27A of the U.S. Securities Act of 1933, as amended, and Section 21E of the U.S. Securities Exchange Act of 1934, as amended. The terms "anticipates", "believes", "expects", "foresees", "intends", "plans", "projects", "aims", "shall" and other similar terms are aimed identifying such forecasts, which evidently involve risks or uncertainties that may or not be foreseen by the Company. Information on business prospects, projections and financial targets constitutes mere forecasts based on management's current expectations regarding the future of the Company and its subsidiaries. These expectations depend on market conditions and on the economic scenario in Brazil and the countries where the Company operates and the sectors in which it operates. Any change in the perception or the factors described above may cause actual results to differ from the estimates presented here.

São Paulo, October 3rd, 2024.

Marcelo Feriozzi Bacci

Chief Financial and Investor Relations Officer