Suzano (NYSE: SUZ) files Form 6-K including shareholder agreement exhibit

Rhea-AI Filing Summary

Suzano S.A., a foreign private issuer, submitted a Form 6-K for December 2025. The filing notes that the company reports under Form 20-F and includes a single enclosure identified as Exhibit 99.1 – Shareholder's Agreement. The report is signed on behalf of Suzano S.A. by Marcos Moreno Chagas Assumpção, Vice-President of Finance and Investor Relations.

Form 6-K: How Foreign Companies Report to the SEC →

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 December, 2025.

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 – Shareholder's Agreement

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: December 19th, 2025

						SUZANO S.A.
			By:			/s/ Marcos Moreno Chagas Assumpção
			Name:			Marcos Moreno Chagas Assumpção
			Title:			Vice-President of Finance and Investor Relations

FAQ

What is contained in Suzano (SUZ) December 2025 Form 6-K?

Suzano’s December 2025 Form 6-K records a routine foreign issuer report. It primarily serves to furnish Exhibit 99.1, identified as a Shareholder's Agreement, without detailing its specific terms in the visible portion.

Which exhibit is attached to Suzano (SUZ) December 2025 Form 6-K?

The Form 6-K lists one enclosure, labeled Exhibit 99.1 – Shareholder's Agreement. This indicates that the key substantive content is contained in the separate exhibit rather than in the short cover pages themselves.

Who signed Suzano (SUZ) December 2025 Form 6-K?

The filing is signed on behalf of Suzano S.A. by Marcos Moreno Chagas Assumpção. His title is Vice-President of Finance and Investor Relations, reflecting responsibility for financial communication and investor-facing disclosures.

Under which annual report form does Suzano (SUZ) report?

The document indicates Suzano S.A. reports as a foreign private issuer under Form 20-F. This form is typically used by non-U.S. companies whose securities trade in U.S. markets for their annual disclosures.

What type of issuer is Suzano (SUZ) in this Form 6-K?

Suzano S.A. is identified as a foreign private issuer in the Form 6-K. That classification means it follows SEC rules tailored for non-U.S. companies with registered securities in U.S. markets.