Klabin S A : Minutes of Board of Directors Meeting

KLABIN S.A.

CNPJ nº 89.637.490/0001-45

NIRE nº 35300188349

EXTRACT FROM THE MINUTES OF THE EXTRAORDINARY

MEETING OF THE BOARD OF DIRECTORS

HELD ON DECEMBER 18, 2023

1. Date, time and place: On December 18th (eighteenth), 2023, at 2:30 pm, the

Board of Directors of Klabin S.A. ("Company"), headquartered at Avenida Brigadeiro Faria

Lima, No. 3600, 5th floor, in the city of São Paulo, State of São Paulo.

• 1. Notice of Meeting: The Directors were previously convened in accordance with Article 18 of the Bylaws.
  2. Attendence: All the members of the Company's Board of Directors were present, according to the names listed at the end of these minutes.
  3. Board: Amanda Klabin Tkacz - Chairperson; Mariangela Daniele Maruishi Bartz
• Secretary.
• 1. Agenda: Project approval, as described below.
  2. Subjects and Resolutions taken: To begin the deliberations, unanimous approval was given to the drawing up of these minutes in summary form, pursuant to article 130, paragraph 1 of the Corporations Law. After discussing the matter on the agenda and providing the necessary clarifications on the subject, the Directors unanimously approved the minutes without any reservations: (i) under the terms of article 20, "i", "I" of the Bylaws, ad referendum of the Company's general meeting, the acquisition of forestry assets (land and forests) and some machinery and equipment from Celulosa Arauco Y Constitución S.A. and of the Inversiones Arauco Internacional Limitada, through the acquisition of 100% of the equity interest in the companies Arauco Florestal Arapoti S.A., Arauco Forest Brasil S.A., Empreendimentos Florestais Santa Cruz Ltda. and 49% of Florestal Vale do Corisco S.A. (together, "Targets"), for US$ 1,160,000,000.00 (one billion, one hundred and sixty million US dollars), - considering working capital and zero net debt, such amount remaining subject to

adjustments according to the net debt and working capital determined, as well as the effective volume of forestry assets - which consist of approximately 149,584 thousand hectares of total area, by the Company or through its subsidiaries with joint and several guarantee and without the benefit of the Company's order, subject to the approval of the transaction by the Administrative Council for Economic Defense (CADE) and the verification of other conditions usual in transactions of this nature ("Project"); (ii) the convening, as soon as appropriate, of the Company's general meeting, pursuant to Article 256, I of the Brazilian Corporation Law, in order to approve or ratify, as applicable, the Project, as it constitutes, for the Company, a relevant investment; (iii) the delegation to the Statutary Board to negotiate all the terms and conditions of the documents pertinent to the transaction, including the price adjustment foreseen in the documents, once the premises presented to the Board of Directors on this date have been maintained, expressly ratifying all the acts already performed so far aiming at the consummation thereof; (iv) the delegation to the Executive Board to execute any corporate acts necessary for the implementation of the Project, including any corporate reorganization (such as contribution of assets, spin-off, merger, etc.) involving the Targets; (v) the authorization for the Officers or attorneys-in-fact of the Company and its subsidiaries to sign the Project documents, as well as any and all documents related to the Project.

7. Closing: There being no further business, the meeting was adjourned and these minutes were drawn up, read and approved, and signed by the members present and by the Secretary.

São Paulo, December 18, 2023.

Amanda Klabin Tkacz - Chairperson, Mariangela Bartz - Secretary, Alberto Klabin, Wolff Klabin, Vera Lafer, Francisco Lafer Pati, Horácio Lafer Piva, Paulo Sérgio Coutinho Galvão Filho, Lilia Klabin Levine, Celso Lafer, Roberto Luiz Leme Klabin, Amaury Guilherme Bier, Marcelo Mesquita de Siqueira Filho, Mauro Rodrigues da Cunha e Isabella Saboya de Albuquerque.

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I hereby certify that the above text is the authentic one of the minutes of the Extraordinary Meeting of the Board of Directors held on December 18, 2023, at 2:30 pm, drawn up in proper book.

Mariangela Daniele Maruishi Bartz

Secretary

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