SUZ / Suzano S.A. - Depositary Receipt (Common Stock) - Pengajuan SEC, Laporan Tahunan, Pernyataan Kuasa

Suzano S.A. - Depositary Receipt (Common Stock)
US ˙ NYSE

Statistik Dasar
LEI 391200AW174YQSDMGG41
CIK 909327
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Suzano S.A. - Depositary Receipt (Common Stock)
SEC Filings (Chronological Order)
Halaman ini menyediakan daftar kronologis Pengajuan SEC yang lengkap, tidak termasuk pengajuan kepemilikan yang kami sediakan di tempat lain.
May 28, 2026 EX-99.1

MATERIAL FACT SUZANO S.A. Publicly-Held Company with Authorized Capital Corporate Taxpayer ID (CNPJ/ME): 16.404.287/0001-55 Company Registry (NIRE): 29.3.0001633-1

MATERIAL FACT SUZANO S.A. Publicly-Held Company with Authorized Capital Corporate Taxpayer ID (CNPJ/ME): 16.404.287/0001-55 Company Registry (NIRE): 29.3.0001633-1 São Paulo, May 28, 2026 – Suzano S.A. ("Suzano" or "Company") (B3: SUZB3 | NYSE: SUZ), in compliance with the provisions of CVM Resolution No. 44, of August 23, 2021, and CVM Resolution No. 80, of March 29, 2022, as amended, in line wit

May 28, 2026 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 May, 2026. Commission File Number 001-38755 S

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 May, 2026.

May 11, 2026 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 May, 2026. Commission File Number 001-38755 S

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 May, 2026.

May 11, 2026 EX-99.1

MATERIAL FACT SUZANO S.A. Publicly-Held Company Corporate Taxpayer ID (CNPJ/ME): 16.404.287/0001-55 Company Registry (NIRE): 29.3.0001633-1

MATERIAL FACT SUZANO S.A. Publicly-Held Company Corporate Taxpayer ID (CNPJ/ME): 16.404.287/0001-55 Company Registry (NIRE): 29.3.0001633-1 São Paulo, May 11, 2026 – Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3 | NYSE: SUZ), in accordance with the provisions of Law No. 6,404, of December 15, 1976, as amended, CVM Resolution No. 44, of August 23, 2021, and CVM Resolution No. 80, of March 29, 2022

May 7, 2026 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 May, 2026. Commission File Number 001-38755 S

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 May, 2026.

May 7, 2026 EX-99

SUZANO S.A. Publicly Held Company with authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 EXTRACT OF THE MINUTES OF THE BOARD OF DIRECTORS ORDINARY MEETING HELD ON APRIL 29, 2026

Exhibit 99.1 SUZANO S.A. Publicly Held Company with authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 EXTRACT OF THE MINUTES OF THE BOARD OF DIRECTORS ORDINARY MEETING HELD ON APRIL 29, 2026 1.Date, Time, and Venue: On April 29, 2026, at 8 am, at Suzano S.A. branch (“Company”) located at Av. Brigadeiro Faria Lima, 1355, 8th floor, in the City of São Paulo, State of São Paul

April 30, 2026 EX-99.1

Earnings Conference Call 1Q26 Disclaimer 2 This presentation contains what are considered “forward-looking statements,” as defined in Section 27A of the 1933 Securities Act and Section 21E of the 1934 Securities Exchange Act, as amended. Some of thes

apresentaoderesultados1t Earnings Conference Call 1Q26 Disclaimer 2 This presentation contains what are considered “forward-looking statements,” as defined in Section 27A of the 1933 Securities Act and Section 21E of the 1934 Securities Exchange Act, as amended.

April 30, 2026 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 April, 2026. Commission File Number 001-38755

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 April, 2026.

April 29, 2026 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 April, 2026. Commission File Number 001-38755

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 April, 2026.

April 29, 2026 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 April, 2026. Commission File Number 001-38755

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 April, 2026.

April 29, 2026 EX-99.1

Solid operating performance and higher pulp prices. EBITDA impacted by a stronger BRL. São Paulo, April 29th, 2026. Suzano S.A. (B3: SUZB3 | NYSE: SUZ), one of the world’s largest integrated pulp and paper producers, announces today its consolidated

earningsrelease1t26xen Solid operating performance and higher pulp prices. EBITDA impacted by a stronger BRL. São Paulo, April 29th, 2026. Suzano S.A. (B3: SUZB3 | NYSE: SUZ), one of the world’s largest integrated pulp and paper producers, announces today its consolidated results for the first quarter of 2026 (1Q26). HIGHLIGHTS • Pulp sales of 2,835 thousand tonnes (+7% vs. 1Q25). • Paper sales1 o

April 24, 2026 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 April, 2026. Commission File Number 001-38755

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 April, 2026.

April 24, 2026 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 April, 2026. Commission File Number 001-38755

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 April, 2026.

April 24, 2026 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 April, 2026. Commission File Number 001-38755

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 April, 2026.

April 24, 2026 EX-99.1

SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 CHAPTER I NAME, HEAD OFFICE, DURATION AND PURPOSE

BYLAWS SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 CHAPTER I NAME, HEAD OFFICE, DURATION AND PURPOSE Article 1 – SUZANO S.A. (“Company”) is a Brazilian publicly held company with authorized capital, governed by these Bylaws and by the applicable legislation, operating in an ethically responsible manner and with respect for human

April 24, 2026 EX-99.1

NOTICE TO SHAREHOLDERS SUZANO S.A. Publicly-held Company Tax Id No. (CNPJ/MF) No.16.404.287/0001-55 NIRE 29.300.016.331

NOTICE TO SHAREHOLDERS SUZANO S.A. Publicly-held Company Tax Id No. (CNPJ/MF) No.16.404.287/0001-55 NIRE 29.300.016.331 São Paulo, April 23rd, 2026 – Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3 /NYSE: SUZ), hereby announces to its shareholders and to the general market that at the Annual and Extraordinary General Meeting held on this date, the distribution of additional dividends in the amount

April 24, 2026 EX-99.1

SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE ANNUAL AND EXTRAORDINARY GENERAL SHAREHOLDERS' MEETINGS HELD ON APRIL 23, 2026

(Portuguese version shall prevail) Exhibit 99.1 SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE ANNUAL AND EXTRAORDINARY GENERAL SHAREHOLDERS' MEETINGS HELD ON APRIL 23, 2026 1.DATE, TIME AND PLACE: On April 23, 2026, at 10:00 a.m., held exclusively by digital means, through the “TEN Meetings” platform (“Digital Platform”

April 2, 2026 EX-99.1

NOTICE TO THE MARKET SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE 29.300.016.331

NOTICE TO THE MARKET SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE 29.300.016.331 São Paulo, April 02, 2026 - Suzano S.A. ("Suzano" or "Company") (B3: SUZB3 | NYSE: SUZ), in addition to the Notices of the Market released on March 09, 2026 and March 10, 2026, hereby informs its shareholders and the market, that (i) yesterday, on April 01, 2026, occurr

April 2, 2026 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 April, 2026. Commission File Number 001-38755

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 April, 2026.

March 24, 2026 EX-12.1

CERTIFICATION PURSUANT TO RULES 13a-14(a) AND 15d-14(a) AS ADOPTED UNDER SECTION 302 OF THE SARBANES-OXLEY ACT

Exhibit 12.1 CERTIFICATION PURSUANT TO RULES 13a-14(a) AND 15d-14(a) AS ADOPTED UNDER SECTION 302 OF THE SARBANES-OXLEY ACT I, João Alberto Fernandez de Abreu, certify that: 1. I have reviewed this annual report on Form 20-F of Suzano S.A. (the “Company”); 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to ma

March 24, 2026 20-F

As filed with the Securities and Exchange Commission on March, 23, 2026 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 20-F

As filed with the Securities and Exchange Commission on March, 23, 2026 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.

March 24, 2026 EX-13.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT

Exhibit 13.1 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT Pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code), the undersigned officer of Suzano S.A. (the “Company”), does hereby certify, to such officer’s knowledge, that: The Annual Report on

March 24, 2026 EX-17.1

SUBSIDIARY ISSUER OF GUARANTEED SECURITIES

Exhibit 17.1 SUBSIDIARY ISSUER OF GUARANTEED SECURITIES Each of the following series of guaranteed notes listed on the New York Stock Exchange has been issued by the respective issuer entity identified below, and is guaranteed by us. Security Issuer Guarantor 6.000% Notes due 2029 Suzano Austria GmbH Suzano S.A. 5.000% Notes due 2030 Suzano Austria GmbH Suzano S.A. 3.750% Notes due 2031 Suzano Aus

March 24, 2026 EX-11.1

SECURITIES TRADING POLICY OF SUZANO S.A.

Exhibit 11.1 . SECURITIES TRADING POLICY OF SUZANO S.A. 1.PURPOSE 1.1The purpose of this Policy is to establish guidelines and procedures to be observed by the Company and by Individuals Subject to the Policy (as defined below), for trading Securities issued by the Company or referenced therein, pursuant to CVM Resolution No. 44/21, as amended. 1.2This Policy is in accordance with the following ba

March 24, 2026 EX-2.1

DESCRIPTION OF SECURITIES REGISTERED UNDER SECTION 12 OF THE EXCHANGE ACT

Exhibit 2.1 DESCRIPTION OF SECURITIES REGISTERED UNDER SECTION 12 OF THE EXCHANGE ACT As of December 31, 2025, Suzano S.A. (“Suzano,” the “Company,” “we,” “us,” and “our”) had the following classes of securities registered pursuant to Section 12(b) of the Exchange Act: # Title of each class Trading symbol(s) Name of each exchange on which registered I Our common shares without par value* SUZB3/ SU

March 24, 2026 EX-15.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 15.1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We hereby consent to the incorporation by reference in the Registration Statement on Form F-3 of Suzano S.A. (No. 333- 286881), Suzano Austria GmbH (No. 333- 286881-01) and Suzano Netherlands B.V. (No. 333- 286881-02) of our report dated February 10, 2026 relating to the consolidated financial statements and the effectiveness of

March 24, 2026 EX-1.1

BYLAWS SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 CHAPTER I NAME, HEAD OFFICE, DURATION AND PURPOSE

Exhibit 1.1 BYLAWS SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 CHAPTER I NAME, HEAD OFFICE, DURATION AND PURPOSE Article 1 – SUZANO S.A. (“Company”) is a Brazilian publicly held company with authorized capital, governed by these Bylaws and by the applicable legislation, operating in an ethically responsible manner and with respec

March 23, 2026 EX-99.3

MANAGEMENT PROPOSAL ANNUAL AND EXTRAORDINARY GENERAL MEETING SUZANO S.A. TO BE HELD CUMULATIVELY EXCLUSIVELY DIGITALLY ON APRIL 23, 2026

Exhibit 99.3 MANAGEMENT PROPOSAL ANNUAL AND EXTRAORDINARY GENERAL MEETING OF SUZANO S.A. TO BE HELD CUMULATIVELY EXCLUSIVELY DIGITALLY ON APRIL 23, 2026 1 Exhibit 99.3 TABLE OF CONTENTS I. Information on matters subject to resolution 3 I. Annex I - Officers’ Comments (Section 2 – RCVM 80/22) 17 II. Annex II - Allocation of the Net Profit (Annex A – RCVM 81/22) 78 III. Annex III - Information regar

March 23, 2026 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 March, 2026. Commission File Number 001-38755

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 March, 2026.

March 23, 2026 EX-99.1

SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS’ MEETING HELD ON MARCH 19, 2026

Exhibit 99.1 SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS’ MEETING HELD ON MARCH 19, 2026 1.Date, Time and Place: March 19, 2026, at 10:00 a.m., at a meeting held exclusively digitally, by means of videoconference (“Meeting”), pursuant to item 6.4 of the Internal Rules of the Board of Directors (“

March 23, 2026 EX-99.2

SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE 29.300.016.331 NOTICE OF MEETING ANNUAL AND EXTRAORDINARY GENERAL MEETING

Exhibit 99.2 SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE 29.300.016.331 NOTICE OF MEETING ANNUAL AND EXTRAORDINARY GENERAL MEETING The Shareholders of (“Suzano” or “Company”) are hereby called, pursuant to article 124 of Law No. 6,404, dated as of December 15, 1976, as amended (“Brazilian Corporation Law”), to meet in Annual and Extraordinary Gener

March 23, 2026 EX-99.4

Shareholder’s Manual Annual and Extraordinary General Meeting April 23, 2026 Table of Contents

Exhibit 99.4 Shareholder’s Manual Annual and Extraordinary General Meeting April 23, 2026 Table of Contents MESSAGE FROM THE MANAGEMENT 1 GUIDELINES FOR PARTICIPATION 2 Date, Time and Place 2 Who can attend the General Meeting 2 Quorum for the holding 2 How to attend the General Meeting 2 Required documentation 2 1) Digital Platform 2 2) Absentee voting 5 Additional clarifications 6 MATTERS SUBJEC

March 11, 2026 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 March, 2026. Commission File Number 001-38755

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 March, 2026.

March 11, 2026 EX-99.1

NOTICE TO THE MARKET SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE 29.300.016.331

NOTICE TO THE MARKET SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE 29.300.016.331 São Paulo, March 10, 2026 - Suzano S.A. ("Suzano" or "Company") (B3: SUZB3 | NYSE: SUZ) hereby informs its shareholders and the market, in compliance with the provisions of article 157, paragraph 4, of Law No. 6. 404, December 15, 1976, as amended ("Brazilian Corporate

March 11, 2026 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 March, 2026. Commission File Number 001-38755

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 March, 2026.

March 11, 2026 EX-99.1

SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS’ MEETING HELD ON MARCH 5, 2026

Exhibit 99.1 SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS’ MEETING HELD ON MARCH 5, 2026 1. Date, Time, and Place: On March 5, 2026, at 10:30 a.m., the Board of Directors (“Board”) of Suzano S.A. (“Suzano” or “Company”) met by digital form (via videoconference). 2. Attendance: All members of the Comp

March 10, 2026 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 March, 2026. Commission File Number 001-38755

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 March, 2026.

March 10, 2026 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 March, 2026. Commission File Number 001-38755

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 March, 2026.

March 10, 2026 EX-99.1

SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS’ MEETING HELD ON MARCH 5, 2026

Exhibit 99.1 SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS’ MEETING HELD ON MARCH 5, 2026 1. Date, Time, and Place: On March 5, 2026, at 10:00 a.m., the Board of Directors (“Board”) of Suzano S.A. (“Suzano” or “Company”) met in digital form (via videoconference). 2. Attendance: All members of the Comp

March 10, 2026 EX-99.1

NOTICE TO THE MARKET SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE 29.300.016.331

NOTICE TO THE MARKET SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE 29.300.016.331 São Paulo, March 09, 2026 - Suzano S.A. ("Suzano" or "Company") (B3: SUZB3 | NYSE: SUZ) hereby informs its shareholders and the market, in compliance with the provisions of article 157, paragraph 4, of Law No. 6. 404, December 15, 1976, as amended ("Brazilian Corporate

February 10, 2026 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 February, 2026. Commission File Number 001-38

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 February, 2026.

February 10, 2026 EX-99.1

Management Report

Management Report 2025 Management Report MESSAGE FROM MANAGEMENT In 2025, we witnessed a surge in global instability, marked by increased fragmentation among economic blocs, expansion of trade barriers, and implementation of tariffs that heightened volatility in trade flows and reduced the predictability of the business environment.

February 10, 2026 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 February, 2026. Commission File Number 001-38

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 February, 2026.

February 10, 2026 EX-99.1

SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 EXTRACT OF MINUTES OF THE BOARD OF DIRECTORS MEETING HELD ON FEBRUARY 10, 2026

Exhibit 99.1 SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 EXTRACT OF MINUTES OF THE BOARD OF DIRECTORS MEETING HELD ON FEBRUARY 10, 2026 1.Date, Time and Venue: On February 10, 2026, at 14:00 p.m. at Suzano S.A. branch (“Company”) located at Av. Brigadeiro Faria Lima, 1355, 8th floor, in the City of São Paulo, State of São Paulo, through the Company’s vi

February 10, 2026 EX-99.1

SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE 29.3.0001633-1 MATERIAL FACT

SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE 29.3.0001633-1 MATERIAL FACT São Paulo, February 10, 2026 – Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3 / NYSE: SUZ), under the provisions of CVM Resolution No. 44, of August 23, 2021 and CVM Resolution No. 80, of March 29, 2022 (“CVM Resolution No. 80/22”), informs its shareholders and the market in g

February 10, 2026 EX-99.1

SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/ME No. 16.404.287/0001-55 NIRE 29.300.016.331 NOTICE TO THE MARKET

SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/ME No. 16.404.287/0001-55 NIRE 29.300.016.331 NOTICE TO THE MARKET São Paulo, February 9th, 2026 – Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3 / NYSE: SUZ), hereby informs its shareholders and the market in general that it has concluded the Company’s share buyback program started on August 9th, 2024, which was approved at the Board

February 10, 2026 EX-99.1

Record sales volume and further reduction in cash cost. Leverage reaches 3.2x. São Paulo, February 10th, 2026. Suzano S.A. (B3: SUZB3 | NYSE: SUZ), one of the world’s largest integrated pulp and paper producers, announces today its consolidated resul

earningsrelease4t25xen Record sales volume and further reduction in cash cost. Leverage reaches 3.2x. São Paulo, February 10th, 2026. Suzano S.A. (B3: SUZB3 | NYSE: SUZ), one of the world’s largest integrated pulp and paper producers, announces today its consolidated results for the fourth quarter of 2025 (4Q25). HIGHLIGHTS • Pulp sales of 3,406 thousand tonnes (+4% vs. 4Q24). • Paper sales1 of 47

February 10, 2026 EX-99.1

SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS’ MEETING HELD ON FEBRUARY 10, 2026

Exhibit 99.1 SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS’ MEETING HELD ON FEBRUARY 10, 2026 1.Date, Time, and Venue: On February 10, 2026, at 10 am, through the Company’s videoconference system, a meeting of its Board of Directors (“Board”) was held. 2.Attendance: The following Directors of the Company attended the Meet

February 10, 2026 EX-99.1

MATERIAL FACT SUZANO S.A. Publicly-Held Company Corporate Taxpayer ID (CNPJ/ME): 16.404.287/0001-55 Company Registry (NIRE): 29.3.0001633-1

MATERIAL FACT SUZANO S.A. Publicly-Held Company Corporate Taxpayer ID (CNPJ/ME): 16.404.287/0001-55 Company Registry (NIRE): 29.3.0001633-1 São Paulo, February 10, 2026 – Suzano S.A. (“Company”) (B3: SUZB3 / NYSE: SUZ), in compliance with the provisions of Law No. 6,404, dated as of December 15th, 1976, as amended (“Brazilian Corporate Law”), of the Brazilian Securities Commission (“CVM”) Resoluti

February 10, 2026 EX-99.3

Report of independent registered public accounting firm

Report of independent registered public accounting firm To the Board of Directors and Shareholders of Suzano S.

February 10, 2026 EX-99.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We hereby consent to the incorporation by reference in the Registration Statement on Form F-3 of Suzano S.

February 10, 2026 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 February, 2026. Commission File Number 001-38

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 February, 2026.

February 10, 2026 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 February, 2026. Commission File Number 001-38

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 February, 2026.

February 10, 2026 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 February, 2026. Commission File Number 001-38

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 February, 2026.

February 10, 2026 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 February, 2026. Commission File Number 001-38

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 February, 2026.

February 10, 2026 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 February, 2026. Commission File Number 001-38

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 February, 2026.

February 10, 2026 EX-99.2

/s/ João Alberto Fernandez de Abreu

Management’s Report on Internal Control over Financial Reporting The management of Suzano S.

February 10, 2026 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 February, 2026. Commission File Number 001-38

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 February, 2026.

February 10, 2026 EX-99.4

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 February, 2026. Commission File Number 001-38

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 February, 2026.

February 10, 2026 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 February, 2026. Commission File Number 001-38

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 February, 2026.

February 5, 2026 EX-99.1

SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS MEETING HELD ON JANUARY 29, 2026

Exhibit 99.1 SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS MEETING HELD ON JANUARY 29, 2026 1.Date, Time, and Venue: On January 29, 2026, at 11a.m., its Board of Directors (“Board”) at Suzano S.A. (“Company”) met through the Company’s videoconferencing system. 2.Attendance: The following Directors of the Company attended

February 5, 2026 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 February, 2026. Commission File Number 001-38

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 February, 2026.

February 5, 2026 EX-99.1

NOTICE TO THE MARKET SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE 29.300.016.331

NOTICE TO THE MARKET SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE 29.300.016.331 São Paulo, February 05, 2026 - Suzano S.A. ("Suzano" or "Company") (B3: SUZB3 | NYSE: SUZ) hereby informs its shareholders and the market that has entered into on, today, a new stand-by revolving credit facility through its wholly-owned subsidiary Suzano International F

February 5, 2026 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 February, 2026. Commission File Number 001-38

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 February, 2026.

January 12, 2026 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 January, 2026. Commission File Number 001-387

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 January, 2026.

January 12, 2026 EX-99.1

NOTICE TO SHAREHOLDERS SUZANO S.A. Publicly-held Company Tax Id No. (CNPJ/MF) No. 16.404.287/0001-55 NIRE 29.3.0001633-1

NOTICE TO SHAREHOLDERS SUZANO S.A. Publicly-held Company Tax Id No. (CNPJ/MF) No. 16.404.287/0001-55 NIRE 29.3.0001633-1 São Paulo, January 12th, 2026 – Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3 | NYSE: SUZ), in compliance with the article 37, paragraph 2, of CVM Resolution No. 81, dated as of March 29, 2022, hereby announces to its shareholders and to the general market that the next Annual

December 29, 2025 EX-99.1

SUZANO S.A. Publicly Held Company CNPJ/ME No. 16.404.287/0001-55 NIRE No. 29.300.016.331 EXTRACT OF THE MINUTES OF THE BOARD OF DIRECTORS MEETING HELD ON DECEMBER 16, 2025

Exhibit 99.1 SUZANO S.A. Publicly Held Company CNPJ/ME No. 16.404.287/0001-55 NIRE No. 29.300.016.331 EXTRACT OF THE MINUTES OF THE BOARD OF DIRECTORS MEETING HELD ON DECEMBER 16, 2025 1.Date, Time, and Venue: On December 16, 2025, at 11:00 a.m. its Board of Directors (“Board”) at Suzano S.A. (“Company”) met through the Company’s videoconferencing system. 2.Attendance: The following Directors of t

December 29, 2025 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 December, 2025. Commission File Number 001-38

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.

December 22, 2025 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 December, 2025. Commission File Number 001-38

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.

December 22, 2025 EX-99.1

SUZANO S.A. Publicly-Held Company Corporate Taxpayer ID (CNPJ/ME): 16.404.287/0001-55 Company Registry (NIRE): 29.3.0001633-1 MATERIAL FACT

SUZANO S.A. Publicly-Held Company Corporate Taxpayer ID (CNPJ/ME): 16.404.287/0001-55 Company Registry (NIRE): 29.3.0001633-1 MATERIAL FACT São Paulo, December 19, 2025 – Suzano S.A. (“Suzano” or the “Company”) (B3: SUZB3 / NYSE: SUZ), in compliance with the provisions of Law No. 6,404 of December 15, 1976, CVM Resolution No. 44 of August 23, 2021, as amended and CVM Resolution No. 80 of March 29,

December 22, 2025 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 December, 2025. Commission File Number 001-38

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.

December 22, 2025 EX-99.1

NOTICE TO THE MARKET SUZANO S.A. Publicly-Held Company Corporate Taxpayer ID (CNPJ/MF): 16.404.287/0001-55 Company Registry (NIRE): 29.3.0001633-1 NOTICE TO THE MARKET

NOTICE TO THE MARKET SUZANO S.A. Publicly-Held Company Corporate Taxpayer ID (CNPJ/MF): 16.404.287/0001-55 Company Registry (NIRE): 29.3.0001633-1 NOTICE TO THE MARKET São Paulo, December 19, 2025 – Suzano S.A. (“Suzano” or the “Company”) (B3: SUZB3 / NYSE: SUZ), in compliance with paragraph 6 of article 12 of CVM Resolution No. 44, dated August 23, 2021, as amended, hereby informs its shareholder

December 22, 2025 EX-99.1

São Paulo, December 19, 2025

SHAREHOLDERS' AGREEMENT OF SUZANO S.A. By this private instrument, the parties described below (each, a "Party" or "Shareholder" and, collectively, the "Parties" or "Shareholders"): (a) Suzano Holding S.A., a publicly traded company, with its registered office in the City of São Paulo, State of São Paulo, at Av. Brigadeiro Faria Lima, no. 1.355, 21st floor, part, Jardim Paulistano, CEP (Zip Code)

December 22, 2025 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 December, 2025. Commission File Number 001-38

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.

December 11, 2025 EX-99.1

This presentation contains what are considered “forward-looking statements,” as defined in Section 27A of the 1933 Securities Act and Section 21E of the 1934 Securities Exchange Act, as amended. Some of these forward-looking statements are identified

suzanoday2025-consolidad This presentation contains what are considered “forward-looking statements,” as defined in Section 27A of the 1933 Securities Act and Section 21E of the 1934 Securities Exchange Act, as amended.

December 11, 2025 EX-99.1

SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS MEETING HELD ON DECEMBER 10, 2025

Exhibit 99.1 SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS MEETING HELD ON DECEMBER 10, 2025 1.Date, Time, and Venue: On December 10, 2025, at 2 p.m., its Board of Directors (“Board”) at Suzano S.A. (“Company”) met through the Company’s videoconferencing system. 2.Attendance: The following Directors of the Company attende

December 11, 2025 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 December, 2025. Commission File Number 001-38

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.

December 11, 2025 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 December, 2025. Commission File Number 001-38

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.

December 11, 2025 EX-99.1

SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS MEETING HELD ON DECEMBER 10, 2025

Exhibit 99.1 SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS MEETING HELD ON DECEMBER 10, 2025 1.Date, Time, and Venue: On December 10, 2025, at 10 a.m., its Board of Directors (“Board”) at Suzano S.A. (“Company”) met through the Company’s videoconferencing system. 2.Attendance: The following Directors of the Company attend

December 11, 2025 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 December, 2025. Commission File Number 001-38

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.

December 11, 2025 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 December, 2025. Commission File Number 001-38

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.

December 11, 2025 EX-99.1

NOTICE TO SHAREHOLDERS SUZANO S.A. Publicly-held Company Tax Id No. (CNPJ/MF) No. 16.404.287/0001-55 NIRE 29.3.0001633-1 Notice of Capital Increase Approved by the Board of Directors

NOTICE TO SHAREHOLDERS SUZANO S.A. Publicly-held Company Tax Id No. (CNPJ/MF) No. 16.404.287/0001-55 NIRE 29.3.0001633-1 Notice of Capital Increase Approved by the Board of Directors São Paulo, December 10, 2025 – Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3 | NYSE: SUZ) hereby announces to its shareholders and to the general that the Company’s Board of Directors Meeting, held on December 10, 20

December 11, 2025 EX-99.1

SUZANO S.A. Publicly-Held Company Corporate Taxpayer ID (CNPJ/ME): 16.404.287/0001-55 Company Registry (NIRE): 29.3.0001633-1 MATERIAL FACT

SUZANO S.A. Publicly-Held Company Corporate Taxpayer ID (CNPJ/ME): 16.404.287/0001-55 Company Registry (NIRE): 29.3.0001633-1 MATERIAL FACT São Paulo, December 11, 2025 – Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3 / NYSE: SUZ), in compliance with the provisions of Law No. 6,404 of December 15, 1976, as amended (“Brazilian Corporation Law”), CVM Resolution No. 44 of August 23, 2021, and CVM Res

December 11, 2025 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 December, 2025. Commission File Number 001-38

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.

December 11, 2025 EX-99.1

NOTICE TO SHAREHOLDERS SUZANO S.A. Publicly-held Company Tax Id No. (CNPJ/MF) No. 16.404.287/0001-55 NIRE 29.3.0001633-1

NOTICE TO SHAREHOLDERS SUZANO S.A. Publicly-held Company Tax Id No. (CNPJ/MF) No. 16.404.287/0001-55 NIRE 29.3.0001633-1 São Paulo, December 10, 2025 – Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3 | NYSE: SUZ) hereby announces to its shareholders and to the general that the Company’s Board of Directors Meeting, held on December 10, 2025, approved the distribution of interim dividends by the Comp

December 11, 2025 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 December, 2025. Commission File Number 001-38

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.

December 10, 2025 EX-99.1

SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS MEETING HELD ON DECEMBER 9th, 2025

Exhibit 99.1 SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS MEETING HELD ON DECEMBER 9th, 2025 1.Date, Time, and Venue: On December 9th, 2025, at 10a.m., its Board of Directors (“Board”) at Suzano S.A. (“Company”) met through the Company’s videoconferencing system. 2.Attendance: The following Directors of the Company atten

December 10, 2025 EX-99.1

SUZANO S.A. Publicly-Held Company Corporate Taxpayer ID (CNPJ/ME): 16.404.287/0001-55 Company Registry (NIRE): 29.3.0001633-1 MATERIAL FACT

SUZANO S.A. Publicly-Held Company Corporate Taxpayer ID (CNPJ/ME): 16.404.287/0001-55 Company Registry (NIRE): 29.3.0001633-1 MATERIAL FACT São Paulo, December 9, 2025 – Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3 / NYSE: SUZ), in compliance with Federal Law 6,404, of December 15, 1976, as amended (“Brazilian Corporations Law”), with CVM Instruction 44 of August 23, 2021, and CVM Resolution 80

December 10, 2025 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 December, 2025. Commission File Number 001-38

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.

December 10, 2025 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 December, 2025. Commission File Number 001-38

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.

November 7, 2025 EX-99.1

Earnings Conference Call 3Q25 Disclaimer 2 This presentation contains what are considered “forward-looking statements,” as defined in Section 27A of the 1933 Securities Act and Section 21E of the 1934 Securities Exchange Act, as amended. Some of thes

apresentaoderesultados3t Earnings Conference Call 3Q25 Disclaimer 2 This presentation contains what are considered “forward-looking statements,” as defined in Section 27A of the 1933 Securities Act and Section 21E of the 1934 Securities Exchange Act, as amended.

November 7, 2025 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 September, 2025. Commission File Number 001-3

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 September, 2025.

November 6, 2025 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 November, 2025. Commission File Number 001-38

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 November, 2025.

November 6, 2025 EX-99.1

Operational efficiency drives further cash cost reduction. São Paulo, November 6th, 2025. Suzano S.A. (B3: SUZB3 | NYSE: SUZ), one of the world’s largest integrated pulp and paper producers, announces today its consolidated results for the third quar

earningsrelease3t25xen Operational efficiency drives further cash cost reduction. São Paulo, November 6th, 2025. Suzano S.A. (B3: SUZB3 | NYSE: SUZ), one of the world’s largest integrated pulp and paper producers, announces today its consolidated results for the third quarter of 2025 (3Q25). HIGHLIGHTS • Pulp sales of 3,165 thousand tonnes (+20% vs. 3Q24). • Paper sales1 of 436 thousand tonnes (+2

November 6, 2025 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 September, 2025. Commission File Number 001-3

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 September, 2025.

October 20, 2025 EX-99.1

NOTICE TO THE MARKET SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE 29.3.0001633-1

NOTICE TO THE MARKET SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE 29.3.0001633-1 São Paulo, October 17, 2025 – Suzano S.A. ("Suzano" or "Company") (B3: SUZB3 | NYSE: SUZ) hereby informs its shareholders and the market that on this date it was priced the issuance and offering of panda bonds, in two tranches, to be placed in the Chinese market, by its

October 20, 2025 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, 2025. Commission File Number 001-387

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, 2025.

October 10, 2025 CERT

NYSE CERTIFICATION

New York Stock Exchange 11 Wall Street New York, NY 10005 Tel: +1 212.656.3000 nyse.com October 10, 2025 Chief, Information Technology Securities and Exchange Commission Division of Corporate Finance 100 F Street, NE MS 3040 Washington, DC 20549 To whom it may concern: The New York Stock Exchange certifies its approval for listing and registration of the 5.500% Global Notes due 2036 of Suzano Neth

September 19, 2025 EX-99.1

NOTICE TO THE MARKET SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE 29.3.0001633-1

NOTICE TO THE MARKET SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE 29.3.0001633-1 São Paulo, September 19, 2025 – Suzano S.A. ("Suzano" or "Company") (B3: SUZB3 | NYSE: SUZ) hereby informs its shareholders and the market that will carry out, on September 26, 2025, the full optional early redemption of the simple, non-convertible, unsecured debentures

September 19, 2025 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 September, 2025. Commission File Number 001-3

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 September, 2025.

September 18, 2025 EX-99.1

SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE 29.3.0001633-1 NOTICE TO THE MARKET

SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE 29.3.0001633-1 NOTICE TO THE MARKET São Paulo, September 17, 2025 – Suzano S.A. (“Companhia” or “Suzano”) (B3: SUZB3 / NYSE: SUZ) ), in response to Official Letter No 189/2025/CVM/SEP/GEA-2 (“Official Letter”), issued by the Brazilian Securities Commission (“CVM”) on September 16, 2025 and received by the

September 18, 2025 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 September, 2025. Commission File Number 001-3

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 September, 2025.

September 16, 2025 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 September, 2025. Commission File Number 001-3

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 September, 2025.

September 16, 2025 EX-99.1

NOTICE OF FULL REDEMPTION TO THE HOLDERS OF SUZANO INTERNATIONAL FINANCE B.V. 5.500% GUARANTEED NOTES DUE 2027

NOTICE OF FULL REDEMPTION TO THE HOLDERS OF SUZANO INTERNATIONAL FINANCE B.V. 5.500% GUARANTEED NOTES DUE 2027 CUSIP: N8438JAB4 ISIN: USN8438JAB46 NOTICE IS HEREBY GIVEN that Suzano International Finance B.V. (the “Issuer”) has elected to redeem all of the outstanding aggregate principal amount of its 5.500% Senior Notes due 2027 (the “Notes”) on September 22, 2025 (the “Redemption Date”), pursuan

September 11, 2025 EX-5.3

September 10, 2025

Exhibit 5.3 September 10, 2025 Suzano S.A. Avenida Professor Magalhaes Neto, 1,752 10th Floor, Rooms 1010 and 1011 41810-012 Salvador – BA Brazil Suzano Netherlands B.V. Spaces Zuidas I, Office 4.10, Barbara Strozzilaan 201, 1083 HN Amsterdam, the Netherlands Ladies and Gentlemen: We have acted as special United States counsel to Suzano S.A., a corporation (sociedade por ações) incorporated under

September 11, 2025 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 Suzano S.A. Suzano Netherlands B.V. (Exact name of each registrant as specified in its charter) Not Applicable Not Applicable (Translation of registrant’s name into English) The Federative Republic

September 11, 2025 EX-4.2

SUZANO NETHERLANDS B.V. SUZANO S.A. THE BANK OF NEW YORK MELLON FIRST SUPPLEMENTAL INDENTURE Dated as of September 10, 2025 Debt Securities FIRST SUPPLEMENTAL INDENTURE

Exhibit 4.2 SUZANO NETHERLANDS B.V. Company SUZANO S.A. Guarantor AND THE BANK OF NEW YORK MELLON Trustee FIRST SUPPLEMENTAL INDENTURE Dated as of September 10, 2025 Debt Securities FIRST SUPPLEMENTAL INDENTURE FIRST SUPPLEMENTAL INDENTURE (this “First Supplemental Indenture”), dated as of September 10, 2025, by and among Suzano Netherlands B.V., a private company with limited liability (besloten

September 11, 2025 EX-4.1

SUZANO NETHERLANDS B.V. SUZANO S.A. THE BANK OF NEW YORK MELLON Dated as of September 10, 2025 Debt Securities Suzano Netherlands B.V. Suzano S.A. Certain Sections of this Indenture relating to Sections 3.10 through 3.18, inclusive, of the Trust Inde

Exhibit 4.1 SUZANO NETHERLANDS B.V. Company SUZANO S.A. Guarantor AND THE BANK OF NEW YORK MELLON Trustee INDENTURE Dated as of September 10, 2025 Debt Securities Suzano Netherlands B.V. Suzano S.A. Certain Sections of this Indenture relating to Sections 3.10 through 3.18, inclusive, of the Trust Indenture Act of 1939: Trust Indenture Act Section Indenture Section (S)3.10(a)(1) ‎6.09 (a)(2) ‎6.09

September 11, 2025 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 September 2025. Commission File Number 001-38

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 September 2025.

September 9, 2025 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 September 2025. Commission File Number 001-38

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 September 2025.

September 8, 2025 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 September 2025. Commission File Number 001-38

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 September 2025.

September 5, 2025 EX-1.2

SUZANO NETHERLANDS B.V. TERMS AGREEMENT Debt Securities Guaranteed by Suzano S.A.

Exhibit 1.2 SUZANO NETHERLANDS B.V. TERMS AGREEMENT Debt Securities Guaranteed by Suzano S.A. September 3, 2025 To: The Underwriters identified herein Ladies and Gentlemen: Suzano Netherlands B.V. (with its corporate seat in Amsterdam, the Netherlands) (the “Company”) agrees to sell to the several Underwriters named in Schedule I hereto for their respective accounts, on and subject to the terms an

September 5, 2025 EX-1.1

suzano netherlands b.v. Debt Securities Guaranteed by Suzano S.A. UNDERWRITING AGREEMENT BASIC PROVISIONS

Exhibit 1.1 suzano netherlands b.v. Debt Securities Guaranteed by Suzano S.A. UNDERWRITING AGREEMENT BASIC PROVISIONS September 3, 2025 To the Underwriters named in the Terms Agreement supplemental hereto Ladies and Gentlemen: Suzano Netherlands B.V., a private company with limited liability (besloten vennootschap met beperkte aansprakelijkheid) incorporated under the laws of the Netherlands, with

September 5, 2025 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 September 2025. Commission File Number 001-38

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 September 2025.

September 4, 2025 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 September, 2025. Commission File Number 001-3

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 September, 2025.

September 4, 2025 EX-FILING FEES

Security Type

Calculation of Filing Fee Tables F-3 Suzano S.A. Table 1: Newly Registered and Carry Forward Securities ☐Not Applicable Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effecti

September 4, 2025 EX-99.1

NOTICE TO THE MARKET SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE 29.300.016.331

NOTICE TO THE MARKET SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE 29.300.016.331 São Paulo, September 03, 2025 - Suzano S.A. ("Suzano" or "Company") (B3: SUZB3 | NYSE: SUZ) hereby informs its shareholders and the market that, on this date, the bonds offering by its wholly owned subsidiary Suzano Netherlands B.V. (“Suzano Netherlands”) was priced, wi

September 4, 2025 424B2

Suzano Netherlands B.V. US$1,000,000,000 5.500% Global Notes due 2036 UNCONDITIONALLY GUARANTEED BY Suzano S.A.

Filed Pursuant to Rule 424(b)(2) Registration Statement Nos. 333-286881 and 333-286881-02 PROSPECTUS SUPPLEMENT (To prospectus dated April 30, 2025) Suzano Netherlands B.V. US$1,000,000,000 5.500% Global Notes due 2036 UNCONDITIONALLY GUARANTEED BY Suzano S.A. Suzano Netherlands B.V. (“Issuer”) is offering US$1,000,000,000 aggregate principal amount of its 5.500% Global Notes due 2036 (the “Notes”

September 4, 2025 FWP

FINAL TERM SHEET U.S.$1,000,000,000 5.500% Global Notes due 2036 September 3, 2025

Issuer Free Writing Prospectus filed pursuant to Rule 433 Supplementing the Preliminary Prospectus Supplement dated September 2, 2025 Registration Statement Nos.

September 2, 2025 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 September 2025. Commission File Number 001-38

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 September 2025.

September 2, 2025 EX-99.1

SUZANO S.A. Publicly Held Company with authorized Capital CNPJ/ME No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS MEETING HELD ON AUGUST 28, 2025

Exhibit 99.1 SUZANO S.A. Publicly Held Company with authorized Capital CNPJ/ME No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS MEETING HELD ON AUGUST 28, 2025 1.Date, Time and Place: On August 28, 2025, at 9am, its Board of Directors (“Board”) met at Suzano S.A. (“Company”) through the Company’s videoconference system. 2.Attendance: The following Directors of the C

September 2, 2025 424B2

Subject to Completion Preliminary Prospectus Supplement, dated SEPTEMBER 2, 2025

Filed Pursuant to Rule 424(b)(2) Registration Statement Nos. 333-286881 and 333-286881-02 The information in this preliminary prospectus supplement and the prospectus to which it relates is not complete and may be changed. This preliminary prospectus supplement and the prospectus to which it relates are not an offer to sell these securities and are not soliciting an offer to buy these securities i

September 2, 2025 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 September, 2025. Commission File Number 001-3

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 September, 2025.

September 2, 2025 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 September, 2025. Commission File Number 001-3

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 September, 2025.

September 2, 2025 EX-99.1

SUZANO S.A. Publicly Held Company with authorized Capital CNPJ/ME No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS MEETING HELD ON AUGUST 28, 2025

Exhibit 99.1 SUZANO S.A. Publicly Held Company with authorized Capital CNPJ/ME No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS MEETING HELD ON AUGUST 28, 2025 1.Date, Time and Place: On August 28, 2025, at 10am, its Board of Directors (“Board”) met at Suzano S.A. (“Company”) through the Company’s videoconference system. 2.Attendance: The following Directors of the

September 2, 2025 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 September, 2025. Commission File Number 001-3

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 September, 2025.

August 22, 2025 EX-99.1

SUZANO S.A. Publicly Held Company with authorized Capital CNPJ/ME No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS MEETING HELD ON AUGUST 18, 2025

Exhibit 99.1 SUZANO S.A. Publicly Held Company with authorized Capital CNPJ/ME No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS MEETING HELD ON AUGUST 18, 2025 1.Date, Time and Place: On August 18, 2025, at 8 am, at Suzano S.A. branch (“Company”) located at Av. Brigadeiro Faria Lima, 1355, 8th floor, in the City of São Paulo, State of São Paulo, through the Company’

August 22, 2025 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 August, 2025. Commission File Number 001-3875

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 August, 2025.

August 19, 2025 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 August, 2025. Commission File Number 001-3875

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 August, 2025.

August 19, 2025 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 August, 2025. Commission File Number 001-3875

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 August, 2025.

August 19, 2025 EX-99.1

SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/ME No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS' MEETING HELD ON AUGUST 14, 2025

Exhibit 99.1 SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/ME No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS' MEETING HELD ON AUGUST 14, 2025 1.Date, Time and Place: August 14, 2025, at 8 a.m., the Board of Directors ("Board") of Suzano S.A. ("Suzano" or "Company") met by digital form (videoconference). 2.Attendance: The following Directors of the

August 19, 2025 EX-99.1

SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE 29.300.016.331 NOTICE TO THE MARKET

SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE 29.300.016.331 NOTICE TO THE MARKET São Paulo, 18 August 2025 – Suzano S.A. ("Suzano" or "Company") (B3: SUZB3 | NYSE: SUZ) hereby informs its shareholders and the market, in compliance with the provisions of article 157, paragraph 4, of Law No. 6. 404, December 15, 1976, as amended ("Brazilian Corporate

August 18, 2025 EX-99.1

SUZANO S.A. Publicly Held Company with authorized Capital CNPJ/ME No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS MEETING HELD ON AUGUST 6, 2025

Exhibit 99.1 SUZANO S.A. Publicly Held Company with authorized Capital CNPJ/ME No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS MEETING HELD ON AUGUST 6, 2025 1.Data, Horário e Local: On August 6, 2025, at 4 pm, at Suzano S.A. branch (“Company”) located at Av. Brigadeiro Faria Lima, 1355, 8th floor, in the City of São Paulo, State of São Paulo, through the Company’s

August 18, 2025 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 August, 2025. Commission File Number 001-3875

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 August, 2025.

August 7, 2025 EX-99.1

Earnings Conference Call 2Q25 Disclaimer 2 This presentation contains what are considered “forward-looking statements,” as defined in Section 27A of the 1933 Securities Act and Section 21E of the 1934 Securities Exchange Act, as amended. Some of thes

apresentaoderesultados2t Earnings Conference Call 2Q25 Disclaimer 2 This presentation contains what are considered “forward-looking statements,” as defined in Section 27A of the 1933 Securities Act and Section 21E of the 1934 Securities Exchange Act, as amended.

August 7, 2025 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 June, 2025. Commission File Number 001-38755

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 June, 2025.

August 7, 2025 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 August, 2025. Commission File Number 001-3875

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 August, 2025.

August 7, 2025 EX-99.1

Strong sales volumes and the beginning of a downward trend in cash cost.

EARNINGS RELEASE 2Q25 Strong sales volumes and the beginning of a downward trend in cash cost.

August 7, 2025 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 August, 2025. Commission File Number 001-3875

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 August, 2025.

August 7, 2025 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 June, 2025. Commission File Number 001-38755

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 June, 2025.

August 7, 2025 EX-99.1

MATERIAL FACT SUZANO S.A. Publicly-Held Company Corporate Taxpayer ID (CNPJ/ME): 16.404.287/0001-55 Company Registry (NIRE): 29.3.0001633-1

MATERIAL FACT SUZANO S.A. Publicly-Held Company Corporate Taxpayer ID (CNPJ/ME): 16.404.287/0001-55 Company Registry (NIRE): 29.3.0001633-1 São Paulo, August 6, 2025 – Suzano S.A. (“Company”) (B3: SUZB3 / NYSE: SUZ), in compliance with the provisions of Law No. 6,404, dated as of December 15th, 1976, as amended (“Brazilian Corporate Law”), of the Brazilian Securities Commission (“CVM”) Resolution

August 7, 2025 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 August, 2025. Commission File Number 001-3875

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 August, 2025.

August 7, 2025 EX-99.1

MATERIAL FACT SUZANO S.A. Publicly-Held Company Corporate Taxpayer ID (CNPJ/ME): 16.404.287/0001-55 Company Registry (NIRE): 29.3.0001633-1

MATERIAL FACT SUZANO S.A. Publicly-Held Company Corporate Taxpayer ID (CNPJ/ME): 16.404.287/0001-55 Company Registry (NIRE): 29.3.0001633-1 São Paulo, August 6, 2025 – Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3 / NYSE: SUZ), in compliance with CVM Instruction 44 of August 23, 2021, and CVM Resolution 80 of March 29, 2022, as amended, in addition to the Material Fact disclosed on December 10, 2

June 16, 2025 EX-99.1

SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/ME No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS’ MEETING HELD ON JUNE 11, 2025

Exhibit 99.1 SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/ME No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS’ MEETING HELD ON JUNE 11, 2025 1.Date, Time and Venue: On June 11, 2025, at 02:00 p.m., its Board of Directors (“Board”) met at Suzano S.A. (“Company”), through the Company’s videoconferencing system. 2.Attendance: The following Directors o

June 16, 2025 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 June, 2025. Commission File Number 001-38755

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 June, 2025.

June 5, 2025 EX-99.1

Joint Venture with Kimberly-Clark Disclaimer This presentation contains what are considered “forward-looking statements,” as defined in Section 27A of the 1933 Securities Act and Section 21E of the 1934 Securities Exchange Act, as amended. Some of th

Joint Venture with Kimberly-Clark Disclaimer This presentation contains what are considered “forward-looking statements,” as defined in Section 27A of the 1933 Securities Act and Section 21E of the 1934 Securities Exchange Act, as amended.

June 5, 2025 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 June, 2025. Commission File Number 001-38755

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 June, 2025.

June 5, 2025 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 June, 2025. Commission File Number 001-38755

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 June, 2025.

June 5, 2025 EX-99.1

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

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, June 5, 2025 – Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3 / NYSE: SUZ), in compliance with CVM Instruction 44 of August 23, 2021, and CVM Resolution 80 of March 29, 2022, as amended, in line with corporate governance best practices, hereby inf

June 5, 2025 EX-99.1

SUZANO S.A. Publicly Held Company with authorized Capital CNPJ/ME No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS EXTRAORDINARY MEETING HELD ON JUNE 4, 2025

Exhibit 99.1 SUZANO S.A. Publicly Held Company with authorized Capital CNPJ/ME No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS EXTRAORDINARY MEETING HELD ON JUNE 4, 2025 1.Date, Time and Venue: On June 4, 2025, at 11am at Suzano S.A. branch (“Company”) located at Av. Brigadeiro Faria Lima, 1355, 8th floor, in the City of São Paulo, State of São Paulo, through the C

June 5, 2025 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 June, 2025. Commission File Number 001-38755

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 June, 2025.

June 4, 2025 EX-99.1

SUZANO S.A. Publicly Held Company with authorized Capital CNPJ/ME No. 16.404.287/0001-55 NIRE No. 29.300.016.331 EXTRACT OF THE MINUTES OF THE BOARD OF DIRECTORS MEETING HELD ON MAY 26, 2025

Exhibit 99.1 SUZANO S.A. Publicly Held Company with authorized Capital CNPJ/ME No. 16.404.287/0001-55 NIRE No. 29.300.016.331 EXTRACT OF THE MINUTES OF THE BOARD OF DIRECTORS MEETING HELD ON MAY 26, 2025 1.Date, Time, and Venue: On May 26, 2025, at 6 pm, through the Company’s videoconference system, a meeting of its Board of Directors (“Board”) was held. 2.Attendance: The following Directors of th

June 4, 2025 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 June, 2025. Commission File Number 001-38755

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 June, 2025.

May 9, 2025 EX-99.1

Earnings Conference Call 1Q25 Disclaimer 2 This presentation contains what are considered “forward-looking statements,” as defined in Section 27A of the 1933 Securities Act and Section 21E of the 1934 Securities Exchange Act, as amended. Some of thes

Earnings Conference Call 1Q25 Disclaimer 2 This presentation contains what are considered “forward-looking statements,” as defined in Section 27A of the 1933 Securities Act and Section 21E of the 1934 Securities Exchange Act, as amended.

May 9, 2025 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 March, 2025. Commission File Number 001-38755

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 March, 2025.

May 8, 2025 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 March, 2025. Commission File Number 001-38755

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 March, 2025.

May 8, 2025 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 May, 2025. Commission File Number 001-38755 S

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 May, 2025.

May 8, 2025 EX-99.1

Heavy maintenance schedule and inventory rebuild limited pulp volumes

EARNINGS RELEASE 1Q25 Heavy maintenance schedule and inventory rebuild limited pulp volumes São Paulo, May 8th, 2025.

May 1, 2025 EX-21.1

EX-21.1

Exhibit 21.1 List of Subsidiaries of Suzano S.A. Subsidiaries Country of Incorporation BEM AGRO INTEGRAÇÃO E DESENVOLVIMENTO S.A. BRAZIL BIOMAS – SERVIÇOS AMBIENTAIS, RESTAURAÇÃO E CARBONO LTDA BRAZIL CELLUFORCE INC. CANADA ENSYN CORPORATION U.S. F&E TECHNOLOGIES, LLC U.S. F&E TECNOLOGIA DO BRASIL S.A. BRAZIL FIBRIA CELULOSE (U.S.A.), INC. U.S. FIBRIA TERMINAL DE CELULOSE DE SANTOS SPE S.A. BRAZIL

May 1, 2025 EX-25.1

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTE

Exhibit 25.1 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTEE PURSUANT TO SECTION 305(b)(2) || THE BANK OF NEW YORK MELLON (Exact name of trustee as specified in its charter) New York (Jurisdiction

May 1, 2025 EX-25.2

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTE

Exhibit 25.2 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTEE PURSUANT TO SECTION 305(b)(2) || THE BANK OF NEW YORK MELLON (Exact name of trustee as specified in its charter) New York (Jurisdiction

May 1, 2025 EX-FILING FEES

Table 1: Newly Registered and Carry Forward Securities

Calculation of Filing Fee Tables F-3 Suzano S.A. Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effective Date Filing F

May 1, 2025 EX-1.1

Suzano austria gmbh Debt Securities Guaranteed by Suzano S.A. UNDERWRITING AGREEMENT BASIC PROVISIONS

Exhibit 1.1 WARNING The taking of this document or any certified copy thereof or any document which confirms or refers to this document or any document constituting substitute documentation thereof (each a “Stamp Duty Sensitive Document”) into the Republic of Austria as well as printing out any e-mail communication which confirms or refers to any Stamp Duty Sensitive Document or to which a copy, a

May 1, 2025 EX-1.2

suzano netherlands b.v. Debt Securities Guaranteed by Suzano S.A. UNDERWRITING AGREEMENT BASIC PROVISIONS

Exhibit 1.2 suzano netherlands b.v. Debt Securities Guaranteed by Suzano S.A. UNDERWRITING AGREEMENT BASIC PROVISIONS [DATE] To the Underwriters named in the Terms Agreement supplemental hereto Ladies and Gentlemen: Suzano Netherlands B.V., a private company with limited liability (besloten vennootschap met beperkte aansprakelijkheid) incorporated under the laws of the Netherlands, with its corpor

May 1, 2025 EX-4.2

SUZANO NETHERLANDS B.V. SUZANO S.A. THE BANK OF NEW YORK MELLON Dated as of [•], 2025 Debt Securities Suzano Netherlands B.V. Suzano S.A. Certain Sections of this Indenture relating to Sections 3.10 through 3.18, inclusive, of the Trust Indenture Act

Exhibit 4.2 SUZANO NETHERLANDS B.V. Company SUZANO S.A. Guarantor AND THE BANK OF NEW YORK MELLON Trustee INDENTURE Dated as of [•], 2025 Debt Securities Suzano Netherlands B.V. Suzano S.A. Certain Sections of this Indenture relating to Sections 3.10 through 3.18, inclusive, of the Trust Indenture Act of 1939: Trust Indenture Act Section Indenture Section (S)3.10(a)(1)            ‎6.09 (a)(2)     

May 1, 2025 EX-4.1

SUZANO AUSTRIA GMBH SUZANO S.A. THE BANK OF NEW YORK MELLON Dated as of [•], 2025 Debt Securities

Exhibit 4.1 SUZANO AUSTRIA GMBH Company SUZANO S.A. Guarantor AND THE BANK OF NEW YORK MELLON Trustee INDENTURE Dated as of [•], 2025 Debt Securities WARNING The taking of this document or any certified copy thereof or any document which confirms or refers to this document or any document constituting substitute documentation thereof (each a “Stamp Duty Sensitive Document”) into the Republic of Au

May 1, 2025 EX-5.3

Schedule

Exhibit 5.3 Linklaters LLP World Trade Centre Amsterdam Zuidplein 180 1077 XV Amsterdam Telephone (31 20) 799 6200 Facsimile (31 20) 799 6300 To: Suzano Netherlands B.V. Barbara Strozzilaan 201 1083 HN Amsterdam The Netherlands 30 April 2025 Suzano Netherlands B.V. (the “Company”) – Form F-3 Registration Statement 1 We have acted as your Dutch legal advisers in connection with the Form F-3 registr

May 1, 2025 F-3ASR

As filed with the Securities and Exchange Commission on April 30, 2025

As filed with the Securities and Exchange Commission on April 30, 2025 Registration No.

May 1, 2025 EX-5.4

April 30, 2025

Exhibit 5.4 April 30, 2025 Suzano S.A. Avenida Professor Magalhaes Neto, 1,752 10th Floor, Rooms 1010 and 1011 41810-012 Salvador – BA Brazil Suzano Netherlands B.V. Barbara Strozzilaan 101, 1.01, 1083HN Amsterdam The Netherlands Suzano Austria GmbH Jakov-Lind-Straße 13 1020 Vienna Austria Ladies and Gentlemen: We have acted as special United States counsel to Suzano S.A., a corporation (sociedade

April 28, 2025 20-F

As filed with the Securities and Exchange Commission on April, 28, 2025 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 20-F

As filed with the Securities and Exchange Commission on April, 28, 2025 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.

April 28, 2025 EX-17.1

SUBSIDIARY ISSUER OF GUARANTEED SECURITIES

Exhibit 17.1 SUBSIDIARY ISSUER OF GUARANTEED SECURITIES Each of the following series of guaranteed notes listed on the New York Stock Exchange has been issued by the respective issuer entity identified below, and is guaranteed by us. Security Issuer Guarantor 4.000% Notes due 2025 Suzano International Finance B.V. Suzano S.A. 5.500% Notes due 2027 Suzano International Finance B.V. Suzano S.A. 6.00

April 28, 2025 EX-11.1

SECURITIES TRADING POLICY OF SUZANO S.A.

Exhibit 11.1 . SECURITIES TRADING POLICY OF SUZANO S.A. 1.PURPOSE 1.1The purpose of this Policy is to establish guidelines and procedures to be observed by the Company and by Individuals Subject to the Policy (as defined below), for trading Securities issued by the Company or referenced therein, pursuant to CVM Resolution No. 44/21, as amended. 1.2This Policy is in accordance with the following ba

April 28, 2025 EX-2.1

DESCRIPTION OF SECURITIES REGISTERED UNDER SECTION 12 OF THE EXCHANGE ACT

Exhibit 2.1 DESCRIPTION OF SECURITIES REGISTERED UNDER SECTION 12 OF THE EXCHANGE ACT As of December 31, 2024, Suzano S.A. (“Suzano,” the “Company,” “we,” “us,” and “our”) had the following classes of securities registered pursuant to Section 12(b) of the Exchange Act: # Title of each class Trading symbol(s) Name of each exchange on which registered I Our common shares without par value* SUZB3/ SU

April 28, 2025 EX-13.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT

Exhibit 13.1 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT Pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code), the undersigned officer of Suzano S.A. (the “Company”), does hereby certify, to such officer’s knowledge, that: The Annual Report on

April 28, 2025 EX-1.1

BYLAWS SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 CHAPTER I NAME, HEAD OFFICE, DURATION AND PURPOSE

Exhibit 1.1 BYLAWS SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 CHAPTER I NAME, HEAD OFFICE, DURATION AND PURPOSE Article 1 – SUZANO S.A. (“Company”) is a Brazilian publicly held company with authorized capital, governed by these Bylaws and by the applicable legislation, operating in an ethically responsible manner and with respec

April 28, 2025 EX-12.1

CERTIFICATION PURSUANT TO RULES 13a-14(a) AND 15d-14(a) AS ADOPTED UNDER SECTION 302 OF THE SARBANES-OXLEY ACT

Exhibit 12.1 CERTIFICATION PURSUANT TO RULES 13a-14(a) AND 15d-14(a) AS ADOPTED UNDER SECTION 302 OF THE SARBANES-OXLEY ACT I, João Alberto Fernandez de Abreu, certify that: 1. I have reviewed this annual report on Form 20-F of Suzano S.A. (the “Company”); 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to ma

March 25, 2025 EX-99.1

SUZANO S.A. Authorized Publicly Traded Company CNPJ/MF (National Register of Legal Entities) under number 16.404.287/0001-55 NIRE (Business Registration Number) 29.300.016.331 MINUTES OF THE MEETING OF THE BOARD OF DIRECTORS HELD ON MARCH 20, 2025

Exhibit 99.1 SUZANO S.A. Authorized Publicly Traded Company CNPJ/MF (National Register of Legal Entities) under number 16.404.287/0001-55 NIRE (Business Registration Number) 29.300.016.331 MINUTES OF THE MEETING OF THE BOARD OF DIRECTORS HELD ON MARCH 20, 2025 1.Date, Time and Place: On March 20, 2025, at 9:00 a.m., in a meeting held exclusively digitally, via videoconference (“Meeting”), in accor

March 25, 2025 EX-99.3

MANAGEMENT PROPOSAL FOR THE ANNUAL GENERAL MEETING OF SUZANO S.A. TO BE HELD EXCLUSIVELY DIGITALLY ON APRIL 25, 2025

Exhibit 99.3 MANAGEMENT PROPOSAL FOR THE ANNUAL GENERAL MEETING OF SUZANO S.A. TO BE HELD EXCLUSIVELY DIGITALLY ON APRIL 25, 2025 Exhibit 99.3 TABLE OF CONTENTS I. Information on the matters subject to deliberation...................................................................... 3 II. Comments by the Officers (Section 2 of Annex C to CVM Resolution 80/22).........................11 III. Infor

March 25, 2025 EX-99.4

Shareholder’s Manual Annual and Extraordinary General Meetings April 25, 2025 Table of contents

Exhibit 99.4 Shareholder’s Manual Annual and Extraordinary General Meetings April 25, 2025 Table of contents MESSAGE FROM MANAGEMENT...........................................................................1 GUIDELINES FOR PARTICIPATION......................................................................2 Date, Time, and Venue......................................................................

March 25, 2025 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 March, 2025. Commission File Number 001-38755

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 March, 2025.

March 25, 2025 EX-99.2

SUZANO S.A. Authorized Publicly Traded Company CNJP/MF (National Register of Legal Entities) under number 16.404.287/0001-55 NIRE (Business Registration Number) 29.300.016.331 CALLING NOTICE ANNUAL GENERAL MEETING

Exhibit 99.2 SUZANO S.A. Authorized Publicly Traded Company CNJP/MF (National Register of Legal Entities) under number 16.404.287/0001-55 NIRE (Business Registration Number) 29.300.016.331 CALLING NOTICE ANNUAL GENERAL MEETING The Shareholders of (“Suzano” or “Company”) are hereby summoned, in accordance with Article 124 of Law No. 6,404 on December 15, 1976, as amended (“Corporation Law”), to mee

February 21, 2025 EX-99.1

SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 EXTRACT OF MINUTES OF THE BOARD OF DIRECTORS’ ORDINARY MEETING HELD ON FEBRUARY 12, 2025

Exhibit 99.1 SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 EXTRACT OF MINUTES OF THE BOARD OF DIRECTORS’ ORDINARY MEETING HELD ON FEBRUARY 12, 2025 1.Date, Time and Venue: On February 12th, 2025, at 14:00 p.m. at Suzano S.A. branch (“Company”) located at Av. Brigadeiro Faria Lima, 1355, 8th floor, in the City of São Paulo, State of São Paulo, through the

February 21, 2025 EX-99.1

SUZANO S.A. Publicly Held Company Corporate Taxpayer ID (CNPJ/MF) No. 16.404.287/0001-55 Company Registry (NIRE) 29.3.0001633-1 NOTICE TO THE MARKET

SUZANO S.A. Publicly Held Company Corporate Taxpayer ID (CNPJ/MF) No. 16.404.287/0001-55 Company Registry (NIRE) 29.3.0001633-1 NOTICE TO THE MARKET São Paulo, February 21st, 2025 – Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3 | NYSE: SUZ) hereby informs its shareholders and the market that on this date it concluded the signing of an export prepayment agreement linked to sustainability (sustaina

February 21, 2025 EX-99.1

SUZANO S.A. Publicly Held Company CNPJ/ME No. 16.404.287/0001-55 NIRE No. 29.300.016.331 EXTRACT OF MINUTES OF THE BOARD OF DIRECTORS’ ORDINARY MEETING HELD ON FEBRUARY 12, 2024

Exhibit 99.1 SUZANO S.A. Publicly Held Company CNPJ/ME No. 16.404.287/0001-55 NIRE No. 29.300.016.331 EXTRACT OF MINUTES OF THE BOARD OF DIRECTORS’ ORDINARY MEETING HELD ON FEBRUARY 12, 2024 1.Date, Time and Venue: On February 12th, 2025, at 10a.m., at Suzano S.A. branch (“Company”) located at Av. Brigadeiro Faria Lima, 1355, 8th floor, in the City of São Paulo, State of São Paulo, through the Com

February 21, 2025 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 February, 2025. Commission File Number 001-38

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 February, 2025.

February 21, 2025 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 February, 2025. Commission File Number 001-38

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 February, 2025.

February 21, 2025 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 February, 2025. Commission File Number 001-38

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 February, 2025.

February 13, 2025 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 February, 2025. Commission File Number 001-38

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 February, 2025.

February 13, 2025 EX-99.1

Earnings Conference Call 4Q24 Disclaimer 2 This presentation contains what are considered “forward-looking statements,” as defined in Section 27A of the 1933 Securities Act and Section 21E of the 1934 Securities Exchange Act, as amended. Some of thes

Earnings Conference Call 4Q24 Disclaimer 2 This presentation contains what are considered “forward-looking statements,” as defined in Section 27A of the 1933 Securities Act and Section 21E of the 1934 Securities Exchange Act, as amended.

February 12, 2025 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 February, 2025. Commission File Number 001-38

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 February, 2025.

February 12, 2025 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 February, 2025. Commission File Number 001-38

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 February, 2025.

February 12, 2025 EX-99.2

Report of independent registered public accounting firm

Report of independent registered public accounting firm To the Board of Directors and Shareholders of Suzano S.

February 12, 2025 EX-99.1

Ribas performance drives record sales, greater competitiveness and deleveraging

EARNINGS RELEASE 4Q24 Ribas performance drives record sales, greater competitiveness and deleveraging São Paulo, February 12th, 2025.

February 12, 2025 EX-99.3

/s/ João Alberto Fernandez de Abreu

Management’s Report on Internal Control over Financial Reporting The management of Suzano S.

February 12, 2025 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 December, 2024. Commission File Number 001-38

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, 2024.

February 12, 2025 EX-99.1

i

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 1 COMPANY’S OPERATIONS 7 2 BASIS OF PREPARATION AND PRESENTATION OF FINANCIAL STATEMENTS 12 3 SUMMARY OF MATERIAL ACCOUNTING POLICIES 13 4 FINANCIAL INSTRUMENTS AND RI

January 14, 2025 EX-99.25

EX-99.25

NOTIFICATION OF THE REMOVAL FROM LISTING AND REGISTRATION OF THE STATED SECURITIES The New York Stock Exchange hereby notifies the SEC of its intention to remove the entire class of the stated securities from listing and registration on the Exchange at the opening of business on January 27, 2025, pursuant to the provisions of Rule 12d2-2 (a).

January 10, 2025 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 January, 2025. Commission File Number 001-387

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 January, 2025.

January 10, 2025 EX-99.1

NOTICE TO SHAREHOLDERS SUZANO S.A. Publicly-held Company Tax Id No. (CNPJ/MF) No. 16.404.287/0001-55 NIRE 29.3.0001633-1

NOTICE TO SHAREHOLDERS SUZANO S.A. Publicly-held Company Tax Id No. (CNPJ/MF) No. 16.404.287/0001-55 NIRE 29.3.0001633-1 São Paulo, January 9th, 2025 – Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3 | NYSE: SUZ), in compliance with the article 37, paragraph 2, of CVM Resolution No. 81, dated as of March 29, 2022, hereby announces to its shareholders and to the general market that the next Annual G

December 26, 2024 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 December, 2024. Commission File Number 001-38

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, 2024.

December 26, 2024 EX-99.1

SUZANO S.A. Publicly Held Company Corporate Taxpayer ID (CNPJ/MF) No. 16.404.287/0001-55 Company Registry (NIRE) 29.3.0001633-1 NOTICE TO THE MARKET

SUZANO S.A. Publicly Held Company Corporate Taxpayer ID (CNPJ/MF) No. 16.404.287/0001-55 Company Registry (NIRE) 29.3.0001633-1 NOTICE TO THE MARKET São Paulo, December 26th, 2024 – Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3 / NYSE: SUZ), in compliance with the best corporate governance practices, hereby informs its shareholders and the market in general, in response to media reports regarding

December 26, 2024 EX-99.1

SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS’ MEETING HELD ON DECEMBER 10, 2024

Exhibit 99.1 SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS’ MEETING HELD ON DECEMBER 10, 2024 1. DATE, TIME, AND VENUE: On December 13th, 2024, at 9am, in a hybrid meeting (in person and digitally), in accordance with Item 6.4 of the Internal Rules of the Board of Directors of Suzano S.A. (“Company”). 2. ATTENDANCE: The f

December 26, 2024 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 December, 2024. Commission File Number 001-38

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, 2024.

December 19, 2024 EX-99.1

SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS’ MEETING HELD ON DECEMBER 10, 2024

Exhibit 99.1 SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS’ MEETING HELD ON DECEMBER 10, 2024 1. Date, Time, and Venue: On December 10, 2024, at 11:30 a.m., its Board of Directors (“Board”) met at the branch of Suzano S.A. (“Company”), located at Av. Brigadeiro Faria Lima, 1355, 8th floor, in the City of São Paulo, State

December 19, 2024 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 December, 2024. Commission File Number 001-38

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, 2024.

December 19, 2024 EX-99.1

SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS’ MEETING HELD ON DECEMBER 10, 2024

Exhibit 99.1 SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS’ MEETING HELD ON DECEMBER 10, 2024 1. Date, Time, and Venue: On December 10, 2024, at 10am, at Suzano S.A. branch (“Company”) located at Av. Brigadeiro Faria Lima, 1355, 8th floor, in the City of São Paulo, State of São Paulo, through the Company’s videoconference

December 19, 2024 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 December, 2024. Commission File Number 001-38

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, 2024.

December 16, 2024 EX-99.1

SUZANO S.A. Publicly Held Company Corporate Taxpayer ID (CNPJ/MF) No. 16.404.287/0001-55 Company Registry (NIRE) 29.3.0001633-1 NOTICE TO THE MARKET

SUZANO S.A. Publicly Held Company Corporate Taxpayer ID (CNPJ/MF) No. 16.404.287/0001-55 Company Registry (NIRE) 29.3.0001633-1 NOTICE TO THE MARKET São Paulo, December 13th, 2024 – Suzano S.A. Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3 | NYSE: SUZ) in line with the best practices of corporate governance, hereby informs its shareholders and the market in general that, on this date, the Company

December 16, 2024 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 December, 2024. Commission File Number 001-38

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, 2024.

December 12, 2024 EX-99.1

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

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, December 12, 2024 – Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3 / NYSE: SUZ), in compliance with CVM Instruction 44 of August 23, 2021, and CVM Instruction 480 of December 7, 2009 (“CVM Instruction 480/09”), as amended, in line with corporate g

December 12, 2024 EX-99.1

Disclaimer This presentation contains what are considered “forward-looking statements,” as defined in Section 27A of the 1933 Securities Act and Section 21E of the 1934 Securities Exchange Act, as amended. Some of these forward-looking statements are

Disclaimer This presentation contains what are considered “forward-looking statements,” as defined in Section 27A of the 1933 Securities Act and Section 21E of the 1934 Securities Exchange Act, as amended.

December 12, 2024 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 December, 2024. Commission File Number 001-38

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, 2024.

December 12, 2024 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 December, 2024. Commission File Number 001-38

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, 2024.

December 10, 2024 EX-99.1

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

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, December 10, 2024 – Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3 / NYSE: SUZ), in compliance with Federal Law 6,404, of December 15, 1976, as amended (“Brazilian Corporations Law”), Resolution 44 of August 23, 2021, and CVM Resolution 80 of Marc

December 10, 2024 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 December, 2024. Commission File Number 001-38

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, 2024.

December 5, 2024 6-K

SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS’ MEETING HELD ON DECEMBER 4th, 2024

Exhibit 99.1 SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS’ MEETING HELD ON DECEMBER 4th, 2024 1. Date, Time and Place: The Board of Directors (“Board”) met on December 4th, 2024, at 09:00 a.m., through the Company’s videoconference system, a meeting of its Board of Directors (“Board”) was held. 2. Attendance: The followi

December 5, 2024 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 December, 2024. Commission File Number 001-38

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, 2024.

December 5, 2024 EX-99.1

NOTICE TO SHAREHOLDERS SUZANO S.A. Publicly-held Company Tax Id No. (CNPJ/MF) No. 16.404.287/0001-55 NIRE 29.3.0001633-1

NOTICE TO SHAREHOLDERS SUZANO S.A. Publicly-held Company Tax Id No. (CNPJ/MF) No. 16.404.287/0001-55 NIRE 29.3.0001633-1 São Paulo, December 4th, 2024 – Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3 | NYSE: SUZ), hereby informs its shareholders and the market in general that the Board of Directors, in the meeting held on this date, approved the declaration of interest on equity by the Company, wi

November 14, 2024 EX-99.1

SUZANO S.A. Publicly Held Company Corporate Taxpayer ID (CNPJ/MF) No. 16.404.287/0001-55 Company Registry (NIRE) 29.3.0001633-1 NOTICE TO THE MARKET

SUZANO S.A. Publicly Held Company Corporate Taxpayer ID (CNPJ/MF) No. 16.404.287/0001-55 Company Registry (NIRE) 29.3.0001633-1 NOTICE TO THE MARKET São Paulo, November 14th, 2024 – Suzano S.A. Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3 | NYSE: SUZ) informs its shareholders and the market in general that on this date it was priced the issuance and offering of panda bonds, to be placed in the C

November 14, 2024 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 November, 2024. Commission File Number 001-38

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 November, 2024.

November 5, 2024 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 November, 2024. Commission File Number 001-38

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 November, 2024.

November 5, 2024 EX-99.1

SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS’ MEETING HELD ON OCTOBER 25th, 2024

Exhibit 99.1 SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS’ MEETING HELD ON OCTOBER 25th, 2024 1. Date, Time, and Venue: On October 25, 2024, at 5pm, in a blended meeting (in person and digitally), in accordance with Item 6.4 of the Internal Rules of the Board of Directors of Suzano S.A. (“Company”). 2. Attendance: The fo

October 25, 2024 EX-99.1

Earnings Conference Call 3Q24 Disclaimer 2 This presentation contains what are considered “forward-looking statements,” as defined in Section 27A of the 1933 Securities Act and Section 21E of the 1934 Securities Exchange Act, as amended. Some of thes

Earnings Conference Call 3Q24 Disclaimer 2 This presentation contains what are considered “forward-looking statements,” as defined in Section 27A of the 1933 Securities Act and Section 21E of the 1934 Securities Exchange Act, as amended.

October 25, 2024 EX-99.1

SUZANO S.A. Publicly Held Company Corporate Taxpayer ID (CNPJ/MF) No. 16.404.287/0001-55 Company Registry (NIRE) 29.3.0001633-1 NOTICE TO THE MARKET

SUZANO S.A. Publicly Held Company Corporate Taxpayer ID (CNPJ/MF) No. 16.404.287/0001-55 Company Registry (NIRE) 29.3.0001633-1 NOTICE TO THE MARKET São Paulo, October 25th, 2024 – Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3 / NYSE: SUZ), in line with best corporate governance practices, informs its shareholders and the market in general that, as of today, it has received notification of the re

October 25, 2024 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 001-387

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.

October 25, 2024 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 001-387

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.

October 24, 2024 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 001-387

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.

October 24, 2024 EX-99.1

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 001-387

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.

October 24, 2024 6-K

EBITDA benefited from the exchange rate, higher sales in all businesses and excellent performance of the new Ribas do Rio Pardo Unit

EARNINGS RELEASE 3Q24 EBITDA benefited from the exchange rate, higher sales in all businesses and excellent performance of the new Ribas do Rio Pardo Unit São Paulo, October 24th, 2024.

October 4, 2024 EX-99.1

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

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”) Resoluti

October 4, 2024 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 001-387

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.

October 1, 2024 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 September, 2024. Commission File Number 001-3

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 September, 2024.

October 1, 2024 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 001-387

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.

October 1, 2024 EX-99.1

SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE ANNUAL AND EXTRAORDINARY GENERAL SHAREHOLDERS’ MEETING HELD ON SEPTEMBER 30, 2024

Exhibit 99.1 Portuguese version shall prevail SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE ANNUAL AND EXTRAORDINARY GENERAL SHAREHOLDERS’ MEETING HELD ON SEPTEMBER 30, 2024 1. Date, Time and Place: On September 30, 2024, at 10:00 a.m., in an exclusively digital meeting, by means of the distance electronic participation system made availabl

October 1, 2024 EX-99.1

SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 CHAPTER I NAME, HEAD OFFICE, DURATION AND PURPOSE

Exhibit 99.1 BYLAWS SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 CHAPTER I NAME, HEAD OFFICE, DURATION AND PURPOSE Article 1 – SUZANO S.A. (“Company”) is a Brazilian publicly held company with authorized capital, governed by these Bylaws and by the applicable legislation, operating in an ethically responsible manner and with respe

October 1, 2024 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 September, 2024. Commission File Number 001-3

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 September, 2024.

October 1, 2024 EX-99.1

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

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 1st, 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, of CVM Resolution No. 44, dated as of August 23, 2021 and of CVM Resolution No. 80,

August 30, 2024 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 August, 2024. Commission File Number 001-3875

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 August, 2024.

August 30, 2024 EX-99.1

SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE FISCAL COUNCIL MEETING HELD ON AUGUST 29TH, 2024

Exhibit 99.1 SUZANO S.A. Publicly Held Company with Authorized Capital CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE FISCAL COUNCIL MEETING HELD ON AUGUST 29TH, 2024 1. Date, Time and Venue: August 29, 2024, at 10:00 a.m., by videoconference, pursuant to article 9 of the Internal Rules of the Fiscal Council of Suzano S.A. (“Suzano” or Company”). 2. Attendance: The following

August 30, 2024 EX-99.1

SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS’ MEETING HELD ON AUGUST 29th, 2024

Exhibit 99.1 SUZANO S.A. Publicly Held Company CNPJ/MF No. 16.404.287/0001-55 NIRE No. 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS’ MEETING HELD ON AUGUST 29th, 2024 1. Date, Time and Venue: August 29, at 09:00 a.m., in a meeting held exclusively digitally, by means of videoconference (“Meeting”), pursuant to item 6.4. of the Internal Rules of the Board of Directors (“Board”) of Suzano S.A. (

August 30, 2024 EX-99.3

Shareholder’s Manual Annual and Extraordinary General Meetings September 30, 2024 Table of contents

Exhibit 99.3 Shareholder’s Manual Annual and Extraordinary General Meetings September 30, 2024 Table of contents MESSAGE FROM MANAGEMENT..............................................................1 GUIDELINES FOR PARTICIPATION.........................................................2 Date, time, and Venue.......................................................................2 Who can attend the

August 30, 2024 EX-99.1

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

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, August 30th, 2024 – Suzano S.A. (“Company”) (B3: SUZB3 / NYSE: SUZ), in compliance with the provisions of Law No. 6,404, dated as of December 15th, 1976, as amended, of CVM Resolution No. 44, dated as of August 23rd, 2021, and of CVM Resolution No

August 30, 2024 EX-99.1

SUZANO S.A. Publicly Held Company CNJP/MF No. 16.404.287/0001-55 NIRE 29.300.016.331 CALL NOTICE EXTRAORDINARY GENERAL MEETINGS

Exhibit 99.1 SUZANO S.A. Publicly Held Company CNJP/MF No. 16.404.287/0001-55 NIRE 29.300.016.331 CALL NOTICE EXTRAORDINARY GENERAL MEETINGS The Shareholders of (“Suzano” or “Company”) are hereby called, pursuant to article 124 of Law No. 6,404, dated as of December 15, 1976, as amended (“Brazilian Corporation Law”), to meet at an Extraordinary General Meetings, to be held on September 30, at 10:0

August 30, 2024 EX-99.2

Management Proposal – EGM dated as of September 30, 2024 MANAGEMENT PROPOSAL EXTRAORDINARY GENERAL MEETING OF SUZANO S.A. TO BE HELD EXCLUSIVELY DIGITALLY ON SEPTEMBER 30, 2024 Management Proposal – EGM dated as of September 30, 2024 TABLE OF CONTENT

Management Proposal – EGM dated as of September 30, 2024 MANAGEMENT PROPOSAL EXTRAORDINARY GENERAL MEETING OF SUZANO S.

August 30, 2024 EX-99.1

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

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, August 30th, 2024 – Suzano S.A. (“Company”) (B3: SUZB3 / NYSE: SUZ), in compliance with the provisions included in paragraph 4 of article 157 of Law No. 6,404, dated December 15, 1976, as amended in Securities and Exchange Commission of Brazil (“C

August 30, 2024 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 August, 2024. Commission File Number 001-3875

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 August, 2024.

August 30, 2024 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 August, 2024. Commission File Number 001-3875

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 August, 2024.

August 30, 2024 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 August, 2024. Commission File Number 001-3875

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 August, 2024.

August 30, 2024 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 August, 2024. Commission File Number 001-3875

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 August, 2024.

August 22, 2024 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 August, 2024. Commission File Number 001-3875

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 August, 2024.

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