SUZ / Suzano S.A. - Depositary Receipt (Common Stock) - تصريحات هيئة الأوراق المالية والبورصات، التقرير السنوي، بيان الوكيل

Suzano SA - إيصال الإيداع (الأسهم العادية)
US ˙ NYSE

الإحصائيات الأساسية
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)
توفر هذه الصفحة قائمة كاملة ومرتبة ترتيبًا زمنيًا لتصريحات هيئة الأوراق المالية والبورصات، باستثناء تصريحات الملكية التي نقدمها في مكان آخر.
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 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 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 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 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 001-38

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 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.

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 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

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 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 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 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 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 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 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 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 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 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

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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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-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-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-1.2

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-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 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

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-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)     

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-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-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

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-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-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

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-99.1

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-99.2

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

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 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

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 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 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 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 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 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 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 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

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 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 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 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-99.2

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 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.

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 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

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.

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 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 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 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 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 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 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 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 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 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 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 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 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 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

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 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

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 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

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.

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 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 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 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 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 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 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 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 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 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-99.2

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 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 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 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 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 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.

August 22, 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 EXTRAORDINARY BOARD OF DIRECTORS’ MEETING HELD ON AUGUST 15th, 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 EXTRAORDINARY BOARD OF DIRECTORS’ MEETING HELD ON AUGUST 15th, 2024 1. Date, Time, and Venue: On August 15th, 2024, at 9:00 am, through the Company’s videoconference system, a meeting of its Board of Directors (“Board”) was held. 2. Attendance: The following Directors attended the M

August 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 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 16, 2024 EX-99.1

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

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, August 15th, 2024 - 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 January 29th, 2024, which was appr

August 9, 2024 EX-99.1

EarningsConference Call2Q24 Important advances in all strategic avenues HIGHLIGHTS Pactiv Lenzing Cerrado Project Advancing in the links of the chain, always with a competitive advantage Being bold in expanding to new markets Playing a leading role i

EarningsConference Call2Q24 Disclaimer Thispresentationcontainswhatareconsidered“forward-lookingstatements,”asdefinedinSection27Aofthe1933SecuritiesActandSection21Eofthe1934SecuritiesExchangeAct,asamended.

August 9, 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 09th, 2024 – Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3 / NYSE: SUZ), under the provisions of CVM Resolution No. 44, of August 23, 2021 (“CVM Resolution No. 44/21”), CVM Resolution No. 80, of March 29, 2022 (“CVM Resolution No. 80/22”),

August 9, 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 9, 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 9, 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 EXTRAORDINARY BOARD OF DIRECTORS’ MEETING HELD ON AUGUST 9th, 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 EXTRAORDINARY BOARD OF DIRECTORS’ MEETING HELD ON AUGUST 9th, 2024 1. Date, Time, and Venue: On August 9th, 2024, at 8:00 am, through the Company’s videoconference system, a meeting of its Board of Directors (“Board”) was held. 2. Attendance: The following Directors attended the Mee

August 9, 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 8, 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 8, 2024 EX-99.1

EBITDA reaches R$6.3 billion and leverage drops to 3.2x in USD

EXHIBIT 99.1 EARNINGS RELEASE 2Q24 EBITDA reaches R$6.3 billion and leverage drops to 3.2x in USD São Paulo, August 8th, 2024. Suzano S.A. (B3:SUZB5 | NYSE: SUZ), one of the world’s largest integrated pulp and paper producers, announces today its consolidated results for the second quarter of 2024 (2Q24). HIGHLIGHTS •Pulp sales of 2,545 thousand tons (1% vs. 2Q23). •Paper sales1 of 333 thousand to

August 8, 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.

July 31, 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 July, 2024. 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 July, 2024.

July 31, 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, July 31st, 2024 – Suzano S.A. (“Company” or “Suzano”) (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 Resolu

July 22, 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, July 21st, 2024 – Suzano S.A. (“Company” or “Suzano”) (B3:SUZB3/ NYSE: SUZ), in compliance with article 157, paragraph 4 of Federal Law 6,404, of December 15th, 1976, as amended ("Brazilian Corporations Law"), CVM Resolution 44, of August 23th, 20

July 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 July, 2024. 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 July, 2024.

July 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, July 12th, 2024 – Suzano S.A. (“Company”) (B3: SUZB3 / NYSE: SUZ), in compliance with Law No. 6,404, from December 15th, 1976, as amended, CVM Resolution No. 44, dated August 23th, 2021 and CVM Resolution No. 80, dated March 29 th, 2022, both as a

July 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 July, 2024. 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 July, 2024.

July 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 July, 2024. 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 July, 2024.

July 12, 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 EXTRAORDINARY BOARD OF DIRECTORS’ MEETING HELD ON JULY 12, 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 EXTRAORDINARY BOARD OF DIRECTORS’ MEETING HELD ON JULY 12, 2024 1. Date, Time, and Venue: On July 12, 2024, 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 Company’s videoconf

June 27, 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 June, 2024. 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, 2024.

June 27, 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, June 26th, 2024 – Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3/ NYSE: SUZ), in compliance with of Law No. 6.404, of December 15th, 1976, as amended, Resolution No. 44, of August 23rd, 2021, and CVM Resolution No. 80, of March 29th, 2022, as amen

June 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 June, 2024. 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, 2024.

June 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 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 25th, 2024 – Suzano S.A. (“Company” or “Suzano”) (B3:SUZB3 / NYSE:SUZ), in compliance with the provisions set forth in paragraph 4, article 157 of Law 6,404, of December 15th, 1976, as amended (“Brazilian Corporation Law”), with CVM Resolutio

June 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, June 12, 2024 – Suzano S.A. (“Company”) (B3: SUZB3 / NYSE: SUZ), in compliance with paragraph 4th, article 157 of Law nº 6,404, from December 15th, 1976, as amended (“Corporations Law”), and in CVM Resolution nº 44, dated August 23th, 2021, as ame

June 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 June, 2024. 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, 2024.

June 12, 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 EXTRAORDINARY BOARD OF DIRECTORS’ MEETING HELD ON JUNE 11, 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 EXTRAORDINARY BOARD OF DIRECTORS’ MEETING HELD ON JUNE 11, 2024 1.Date, Time, and Venue: On June 11, 2024, at 7 pm, the Board of Directors (“Board”) of Suzano S.A. (“Company”) met via Company’s videoconference system. 2.Attendance: The following Directors attended the Meeting: David

June 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 June, 2024. 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, 2024.

May 30, 2024 EX-99.1

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

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, May 29, 2024 – Suzano S.A. ("Suzano" or "Company") (B3: SUZB3 | NYSE: SUZ), in addition to the Notice to the Market released on May 17, 2024, informs its shareholders and to the market in general that, in the present date, it occurred the set

May 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 May, 2024. 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, 2024.

May 22, 2024 EX-99.1

SUZANO S.A. Publicly-Held Company Corporate Taxpayer ID (CNPJ/MF): 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): 16.404.287/0001-55 Company Registry (NIRE): 29.3.0001633-1 MATERIAL FACT São Paulo, May 22th, 2024 – Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3/NYSE: SUZ), in response to Official Letter No. 384/2024-SLS, sent by the Listing and Issuer Supervision Superintendence of B3 S.A. - Brasil, Bolsa, Balcão ("B3"), on May 21th, 2024 ("Le

May 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 May, 2024. 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, 2024.

May 20, 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 MARCH 22, 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 MARCH 22, 2024 1. Date, Time and Place: May 17, at 10:00 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 Company attended the meetin

May 20, 2024 EX-99.1

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

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, May 17, 2024 - 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 ("Brazi

May 20, 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 May, 2024. 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, 2024.

May 20, 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 May, 2024. 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, 2024.

May 17, 2024 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 THE MINUTES OF THE BOARD OF DIRECTORS’ ORDINARY MEETING HELD ON MAY 9, 2024

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 THE MINUTES OF THE BOARD OF DIRECTORS’ ORDINARY MEETING HELD ON MAY 9, 2024 1.Date, Time, and Venue: On May 9, 2024, at 2 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 vide

May 17, 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 May, 2024. 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, 2024.

May 17, 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 May, 2024. 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, 2024.

May 17, 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 MAY , 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 MAY , 2024 1.Date, Time and Venue: On May 9, 2024, at 01:30 pm, at the branch of Suzano S.A. (“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 sys

May 10, 2024 EX-99.1

CERRADO PROJECT Countdown for startup 95% Physical Progress (inside-the-fence¹) 87% Financial Progress (insidece¹) Total capex timeline (R$ billion) 0.1 0.7 7.4 8.5 4.6 0.9 2020 2021 2022 2023 2024 2025 Actual Expected 1 Insidethe fence includes inve

SUZANO Earnings Conference Call 1Q24 SUZB / B3 LISTED NM SUZ / LISTED / NYSE 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 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 May, 2024. 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, 2024.

May 9, 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 May, 2024. 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, 2024.

May 9, 2024 EX-99.1

More favorable market scenario starts benefiting results in the period

EXHIBIT 99.1 EARNINGS RELEASE 1Q24 More favorable market scenario starts benefiting results in the period São Paulo, May 9, 2024. Suzano S.A. (B3:SUZB5 | NYSE: SUZ), one of the world’s largest integrated pulp and paper producers, announces today its consolidated results for the first quarter of 2024 (1Q24). HIGHLIGHTS •Pulp sales of 2,401 thousand tons (-2% vs. 1Q23). •Paper sales1 of 313 thousand

May 9, 2024 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 UNAUDITED CONDENSED CONSOLIDATED FINANCIAL INFORMATION 11 3 SUMMARY OF MATERIAL ACCOUNTING POLICIES

May 9, 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 May, 2024. 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, 2024.

May 8, 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 May, 2024. 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, 2024.

May 8, 2024 EX-99.1

SUZANO S.A. Publicly-Held Company Corporate Taxpayer ID (CNPJ/MF): 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): 16.404.287/0001-55 Company Registry (NIRE): 29.3.0001633-1 MATERIAL FACT São Paulo, May 7, 2024 – Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3 / NYSE: SUZ), in compliance with paragraph 4th, article 157 of Law nº 6,404, from December 15th 1976, as amended (“Corporations Law”), and in CVM Resolution nº 44, dated August 23th 2021,

April 26, 2024 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, Walter Schalka , 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 make the statements

April 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 April, 2024. 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, 2024.

April 26, 2024 EX-1.1

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 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 26, 2024 EX-97

SUZANO S.A. POLICY FOR THE RECOVERY OF ERRONEOUSLY AWARDED COMPENSATION

Exhibit 97 Title: SUZANO S.A. POLICY FOR THE RECOVERY OF ERRONEOUSLY AWARDED COMPENSATION (“CLAWBACK”) Issuer: Legal Date: 11.30.2023 SUZANO S.A. POLICY FOR THE RECOVERY OF ERRONEOUSLY AWARDED COMPENSATION 1.Purpose. The purpose of this Policy is to describe the circumstances in which Executive Officers will be required to repay or return Erroneously Awarded Compensation to the Company in accordan

April 26, 2024 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 26, 2024 20-F

As filed with the Securities and Exchange Commission on April 26, 2024 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 20-F

As filed with the Securities and Exchange Commission on April 26, 2024 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.

April 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 April, 2024. 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, 2024.

April 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 April, 2024. 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, 2024.

April 26, 2024 EX-3.2

Stock Transfer Agreement

Exhibit 3.2 Stock Transfer Agreement By this private instrument, the parties (individually referred to as “Party” or “Shareholder” and jointly referred to as “Parties” or “Shareholders”): (a)DAVID FEFFER, Brazilian, married, entrepreneur, bearer of identity document (RG) number 4.617.720-6 SSP/SP, inscribed in the roll of individual taxpayers (CPF/MF) under number 882.739.628-49, resident and domi

April 26, 2024 EX-99.1

SUZANO S.A. LONG-TERM INCENTIVE PLAN Phantom Shares Plan

Exhibit 99.1 SUZANO S.A. LONG-TERM INCENTIVE PLAN Phantom Shares Plan 1.Definitions i.In this Plan, in the Programs and in the Grant Agreements, terms spelled with initial capital letters have the meaning assigned as described below, unless expressly provided otherwise: “Reference Shares” Shares issued by the Company, representing its share capital, and which serve as a reference unit for calculat

April 26, 2024 EX-99.1

SUZANO S.A. LONG-TERM INCENTIVE PLAN Performance Share Plan

Exhibit 99.1 SUZANO S.A. LONG-TERM INCENTIVE PLAN Performance Share Plan 1.Definitions i.In this Plan, in the Programs and in the Grant Agreements, terms spelled with initial capital letters have the meaning assigned as described below, unless expressly provided otherwise: “Performance Shares” The shares issued by the Company, representing its share capital, to be granted under this Plan, as defin

April 26, 2024 EX-3.1

Statement of Adherence to the Voting Agreement of Suzano Papel e Celulose S.A.

Exhibit 3.1 Statement of Adherence to the Voting Agreement of Suzano Papel e Celulose S.A. By this private instrument, the parties: (a)Alden Fundo de Investimento em Ações, a stock fund with principal place of business located in the City of São Paulo, State of Paulo, at Praça Alfredo Egydio de Souza Aranha, nº 100, Parque Jabaquara, CEP 04344-902, inscribed in the corporate taxpayer registry (CNP

April 26, 2024 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, 2023, 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/ S

April 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 April, 2024. 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, 2024.

April 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 ANNUAL AND EXTRAORDINARY GENERAL SHAREHOLDERS’ MEETING HELD ON APRIL 25, 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 APRIL 25, 2024 1.Date, Time and place: April 25, 2024, at 10:00 a.m., exclusively through a digital system for remote attendance provided by Suzano S.A. (“Company”) pursuant to item II of

April 26, 2024 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 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 CHAPTER I NAME, HEAD OFFICE, DURATION AND PURPOSE

Exhibit 99.1 SUZANO S.A. Publicly Held Company 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 rights. Sole Parag

April 26, 2024 EX-11.1

Table of Contents

Exhibit 11.1 CODE OF ETHICS AND CONDUCT Suzano Table of Contents 01 Introduction 4 02 Glossary 6 03 Ethical Principles & Company’s Values 12 04 Compliance & Knowledge About Current Legislation and Regulations 26 05 Management of the Code of Ethics and Conduct & Responsibilities 28 06 External Ombudsman 32 07 Statement of Commitment 34 01 INTRODUCTION Suzano S.A. is one of the largest companies in

March 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 March, 2024. 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, 2024.

March 25, 2024 EX-99.2

MANAGEMENT PROPOSAL ANNUAL AND EXTRAORDINARY GENERAL MEETINGS SUZANO S.A. TO BE HELD CUMULATIVELY EXCLUSIVELY DIGITALLY ON APRIL 25, 2024

Exhibit 99.2 MANAGEMENT PROPOSAL ANNUAL AND EXTRAORDINARY GENERAL MEETINGS OF SUZANO S.A. TO BE HELD CUMULATIVELY EXCLUSIVELY DIGITALLY ON APRIL 25, 2024 Exhibit 99.2 TABLE OF CONTENTS I. Information on matters subject to resolution................................................................................3 II. Officers’ Comments (Section 2 - RCVM 80/22).......................................

March 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 March, 2024. 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, 2024.

March 25, 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 ANNUAL AND 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 ANNUAL AND EXTRAORDINARY GENERAL MEETINGS The Shareholders of (“Suzano” or “Company”) are hereby called, under article 124 of Law No. 6,404, dated as of December 15, 1976, as amended (“Brazilian Corporation Law”), to meet in Annual and Extraordinary General Meetings, to be held cumulativel

March 25, 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 EXTRAORDINARY MEETING OF THE FISCAL COUNCIL HELD ON MARCH 22, 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 EXTRAORDINARY MEETING OF THE FISCAL COUNCIL HELD ON MARCH 22, 2024 (“Meeting”) 1. Date, Time and Venue: March 22, 2024, at 9 a.m., through the videoconference system of Suzano S.A. (“Suzano” or Company”), the Fiscal Council (“Fiscal Council”) met pursuant to

March 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 March, 2024. 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, 2024.

March 25, 2024 EX-99.3

Shareholder’s Manual Annual and Extraordinary General Meetings April 25, 2024 Table of contents

Exhibit 99.3 Shareholder’s Manual Annual and Extraordinary General Meetings April 25, 2024 Table of contents MESSAGE FROM MANAGEMENT...........................................................................1 GUIDELINES FOR PARTICIPATION......................................................................2 Date, Time, and Venue......................................................................

March 25, 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 MARCH 22, 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 MARCH 22, 2024 1.Date, Time, and Venue: March 22, 2024, at 9 am, in a meeting held exclusively digitally, through videoconference (“Meeting”), under item 6.4 of the Internal Rules of the Board of Directors (“Board”) of Suzano S.A. (“Company”). 2.A

March 6, 2024 EX-99.1

SUZANO S.A. Publicly Held Company with Authorized Capital Corporate Taxpayer ID (CNPJ/MF): 16.404.287/0001-55 Company Registration (NIRE): 29.300.016.331 MINUTES OF THE MEETING OF THE BOARD OF DIRECTORS HELD ON FEBRUARY 28, 2024

SUZANO S.A. Publicly Held Company with Authorized Capital Corporate Taxpayer ID (CNPJ/MF): 16.404.287/0001-55 Company Registration (NIRE): 29.300.016.331 MINUTES OF THE MEETING OF THE BOARD OF DIRECTORS HELD ON FEBRUARY 28, 2024 1. Date, Time and Place: On February 28, 2024, at 9:30 p.m., in a blended meeting (in person and digitally), in accordance with Item 6.4 of the Internal Rules of the Board

March 6, 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 March, 2024. 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, 2024.

March 6, 2024 EX-99.1

SUZANO S.A. Publicly Held Company with Authorized Capital Corporate Taxpayer ID (CNPJ/MF): 16.404.287/0001-55 Company Registration (NIRE): 29.300.016.331 MINUTES OF THE MEETING OF THE BOARD OF DIRECTORS HELD ON FEBRUARY 28, 2024

SUZANO S.A. Publicly Held Company with Authorized Capital Corporate Taxpayer ID (CNPJ/MF): 16.404.287/0001-55 Company Registration (NIRE): 29.300.016.331 MINUTES OF THE MEETING OF THE BOARD OF DIRECTORS HELD ON FEBRUARY 28, 2024 1. Date, Time and Venue: On February 28, 2024, at 10:00 a.m., its Board of Directors (“Board”) met at the branch of Suzano S.A. (“Company”) located at Av. Brigadeiro Faria

March 6, 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 March, 2024. 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, 2024.

February 29, 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 February, 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 February, 2024.

February 29, 2024 EX-99.1

SUZANO S.A. Publicly-Held Company Corporate Taxpayer ID (CNPJ/MF): 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): 16.404.287/0001-55 Company Registry (NIRE): 29.3.0001633-1 MATERIAL FACT São Paulo, February 29th, 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

February 29, 2024 EX-99.1

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 these forward-looking statements a

Exhibit 99.1 Earnings Conference Call 4Q23 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 these forward-looking statements are identified with words such as “believe,” “may,” “could,” “would,” “possible,” “will,” “should,” “expect,

February 29, 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 February, 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 February, 2024.

February 28, 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 February, 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 February, 2024.

February 28, 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 February, 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 February, 2024.

February 28, 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 February, 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 February, 2024.

February 28, 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 February, 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 February, 2024.

February 28, 2024 EX-99.3

December 31,

Exhibit 99.3 CONSOLIDATED BALANCE SHEET ASSETS Note December 31, 2023 December 31, 2022 CURRENT Cash and cash equivalents 5 8,345,871 9,505,951 Marketable securities 6 12,823,886 7,546,639 Trade accounts receivable 7 6,848,454 9,607,012 Inventories 8 5,946,948 5,728,261 Recoverable taxes 9 888,539 549,580 Derivative financial instruments 4.5 2,676,526 3,048,493 Advances to suppliers 10 113,743 108

February 28, 2024 EX-99.1

Cash cost is the lowest since 4Q21 Year 2023 marked by progress “on time and on budget” in the Cerrado Project

Exhibit 99.1 Cash cost is the lowest since 4Q21 Year 2023 marked by progress “on time and on budget” in the Cerrado Project São Paulo, February 28, 2024. 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 2023 (4Q23). HIGHLIGHTS · Pulp sales of 2,761 thousand tons (stable vs. 4Q22).

February 28, 2024 EX-99.2

Report of independent registered public accounting firm

Exhibit 99.2 Report of independent registered public accounting firm To the Board of Directors and Shareholders of Suzano S.A. Opinions on the Financial Statements and Internal Control over Financial Reporting We have audited the accompanying consolidated balance sheets of Suzano S.A. and its subsidiaries (the "Company") as of December 31, 2023 and 2022, and the related consolidated statements of

February 28, 2024 EX-99.1

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

EX991 SUZANO S.A. Publicly-Held Company Corporate Taxpayer ID (CNPJ/MF): 16.404.287/0001-55 Company Registry (NIRE): 29.3.0001633-1 MATERIAL FACT São Paulo, February 28, 2024 – Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3 / NYSE: SUZ), in compliance with the provisions set forth in paragraph 4 of article 157 of Law No. 6,404, dated December 15, 1976, as amended ("Corporations Law"), and in CVM R

February 28, 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 February, 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 February, 2024.

February 28, 2024 EX-99.1

Management Report

Exhibit 99.1 Management Report MESSAGE FROM MANAGEMENT The year 2023 was replete with milestones that lay the foundation for the future of the Company and its business. In the midst of greater volatility in international pulp prices, which at the start of the year declined sharply at an unprecedented pace, and the strong influence on demand caused by significant variations in inventories across pa

February 28, 2024 EX-99.1

Chief Financial Officer and Investor Relations Officer

Exhibit 99.1 Management’s Report on Internal Control over Financial Reporting The management of Suzano S.A. and subsidiaries (the “Company”) is responsible for establishing and maintaining adequate internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting. The Company’s internal control over financial reporting is a process d

February 14, 2024 SC 13G/A

SUZ / Suzano S.A. - Depositary Receipt (Common Stock) / Suzano Holding S.A. - AMENDMENT TO FORM SC 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.

February 6, 2024 EX-99.1

SUZANO S.A. Publicly Held Company with Authorized Capital Corporate Taxpayer ID (CNPJ/MF): 16.404.287/0001-55 Company Registration (NIRE): 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS' EXTRAORDINARY MEETING HELD ON JANUARY 19, 2024

SUZANO S.A. Publicly Held Company with Authorized Capital Corporate Taxpayer ID (CNPJ/MF): 16.404.287/0001-55 Company Registration (NIRE): 29.300.016.331 MINUTES OF THE BOARD OF DIRECTORS' EXTRAORDINARY MEETING HELD ON JANUARY 19, 2024 1. Date, Time and Place: On January 19, 2024, at 10:00 a.m., through the videoconferencing system of Suzano S.A. (“Company”), its Board of Directors met (“Board”).

February 6, 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 February, 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 February, 2024.

January 26, 2024 EX-99.1

SUZANO S.A. Publicly Held Company with Authorized Capital Corporate Taxpayer ID (CNPJ/MF): 16.404.287/0001-55 Company Registration (NIRE): 29.300.016.331 MINUTES OF THE MEETING OF THE BOARD OF DIRECTORS HELD ON JANUARY 26th, 2024

SUZANO S.A. Publicly Held Company with Authorized Capital Corporate Taxpayer ID (CNPJ/MF): 16.404.287/0001-55 Company Registration (NIRE): 29.300.016.331 MINUTES OF THE MEETING OF THE BOARD OF DIRECTORS HELD ON JANUARY 26th, 2024 1. Date, Time and Place: On January 26th, 2024, at 9 a.m., through digital means (videoconference) the Board of Directors met (‘Board”). 2. Attendance: The following Comp

January 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 January, 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 January, 2024.

January 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 January, 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 January, 2024.

January 26, 2024 EX-99.1

SUZANO S.A. Publicly-Held Company Corporate Taxpayer ID (CNPJ/MF): 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): 16.404.287/0001-55 Company Registry (NIRE): 29.3.0001633-1 MATERIAL FACT São Paulo, January 26th, 2024 – Suzano S.A. (“Company” or “Suzano”) (B3: SUZB3 / NYSE: SUZ), under the provisions of CVM Resolution No. 44, of August 23, 2021 (“CVM Resolution No. 44/21”), CVM Resolution No. 80, of March 29, 2022 (“CVM Resolution No. 80/22”) a

January 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 January, 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 January, 2024.

January 12, 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, January 12, 2024 – 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 Ge

January 3, 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 January, 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 January, 2024.

January 3, 2024 EX-99.1

SUZANO S.A. Publicly Held Company with Authorized Capital Corporate Taxpayer ID (CNPJ/MF): 16.404.287/0001-55 Company Registration (NIRE): 29.300.016.331 MINUTES OF THE MEETING OF THE BOARD OF DIRECTORS HELD ON DECEMBER 22, 2023

SUZANO S.A. Publicly Held Company with Authorized Capital Corporate Taxpayer ID (CNPJ/MF): 16.404.287/0001-55 Company Registration (NIRE): 29.300.016.331 MINUTES OF THE MEETING OF THE BOARD OF DIRECTORS HELD ON DECEMBER 22, 2023 1.Date, Time and Place: The Board of Directors (“Board”) met on December 22, 2023, at 7 p.m., at the branch office of Suzano S.A. (“Company”) located at Avenida Brigadeiro

December 26, 2023 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, 2023 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 December, 2023 Commission File Number 001-38755 Suzano S.

December 26, 2023 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

Exhibit 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 São Paulo, December 23, 2023 – 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 Resol

December 26, 2023 EX-99.1

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

Exhibit 99.1 SUZANO S.A. Publicly-Held Company Corporate Taxpayer ID (CNPJ/MF): 16.404.287/0001-55 Company Registry (NIRE): 29.3.0001633-1 MATERIAL FACT São Paulo, December 23, 2023 – 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

December 26, 2023 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, 2023 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 December, 2023 Commission File Number 001-38755 Suzano S.

December 1, 2023 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, 2023. 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, 2023.

December 1, 2023 EX-99.1

NOTICE TO SHAREHOLDERS SUZANO S.A. Publicly Held Company with Authorized Capital Corporate Taxpayer ID (CNPJ/MF) No. 16.404.287/0001-55 Company Registration (NIRE) 29.300.016.331

Exhibit 99.1 NOTICE TO SHAREHOLDERS SUZANO S.A. Publicly Held Company with Authorized Capital Corporate Taxpayer ID (CNPJ/MF) No. 16.404.287/0001-55 Company Registration (NIRE) 29.300.016.331 São Paulo, December 1st, 2023 – 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

December 1, 2023 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 2023. 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 December 2023.

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