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 2023.

Commission File Number 001-38755

Suzano S.A.

(Exact name of registrant as specified in its charter)

SUZANO INC.

(Translation of Registrant’s Name into English)

Av. Professor Magalhaes Neto, 1,752

10th Floor, Rooms 1010 and 1011

Salvador, Brazil 41 810-012

(Address of principal executive office)

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

Form 20-F ☒        Form 40-F ☐

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

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

Enclosures:

Exhibit 99.1 – Notice to the Market – Conclusion of Share Buyback Program (October/22)

2

SIGNATURE

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

Date: July 7, 2023

	SUZANO S.A.
By:	/s/ Marcelo Feriozzi Bacci
Name:	Marcelo Feriozzi Bacci
Title:	Chief Financial and Investor Relations Officer

3

EX-99.1

Exhibit 99.1

SUZANO S.A.

Publicly Held Company with Authorized Capital

CNPJ/ME No. 16.404.287/0001-55

NIRE 29.300.016.331

NOTICE TO THE MARKET

São Paulo, July 7, 2023 – 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 30, 2023, which was approved at the Board of Directors Meeting (“October/2022 Program”), according to the material fact disclosed on October 27, 2022. The Company acquired 20,000,000 (twenty million) shares on the stock exchange market regular trading session, at an average price of R$44.02/share, totaling R$880 million.

After carrying out the acquisition of shares under the July/2022 Program, the Company holds in treasury the amount of 34,765,600 (three hundred and forty-seven million, six hundred and fifty-six thousand, six hundred) common shares.

São Paulo, July 7, 2023.

Marcelo Feriozzi Bacci

Chief Financial and Investor Relations Officer