B3 S A Brasil Bolsa Balcão : Minutes of the BM - 12/21/2023

B3 S.A. - BRASIL, BOLSA, BALCÃO

PUBLICLY-HELD COMPANY

CNPJ nº 09.346.601/0001-25

NIRE 35.300.351.452

MINUTES OF THE EXTRAORDINARY MEETING OF THE BOARD OF

DIRECTORS HELD ON DECEMBER 21, 2023

1. Date, Time and Place: On December 21, 2023, by electronic means, considered to have been held at 5:00 p.m., at the principal place of business of B3 SA - Brasil, Bolsa,
   Balcão ("Company" or "B3") located in the city of São Paulo, State of São Paulo, at Praça
   Antonio Prado No. 48, Centro.
2. Attendance: Messr. Antonio Carlos Quintella - Chairman, Ana Dolores Moura Carneiro de Novaes, Caio Ibrahim David, Claudia de Souza Ferris, Claudia Farkouh Prado, Cristina Anne Betts, Florian Bartunek, Guilherme Affonso Ferreira, Mauricio Machado de Minas, Pedro Paulo Giubbina Lorenzini and Mr. Rodrigo Guedes Xavier - Directors.
3. Presiding Board: Mr. Antonio Carlos Quintella - Chairman; and Ms. Iael Lukower - Secretary.
4. Resolutions passed based on the supporting documents that are filed at the
   Company's headquarters, having authorized the drawing up of these minutes in summary form:

4.1. Based on article 57 of the Bylaws, to approve the payment, to the Company's shareholders, of (i) interest on equity, in the total amount of R$ 334.150.000,00, equivalent to the gross amount of R$ 0,05953824 per share, which will be paid at the net amount of R$ 0,05060750 per share, considering the number of shares in circulation on December 11, 2023, with due regard to item 4.1.2 below, already deducting Withholding Income Tax of 15% levied on such amount, except for shareholders who are subject to different taxation or who are exempt from said taxation, and (ii) dividends, referring to the calculation of the result for the 3rd quarter of fiscal year 2023, in the total amount of R$ 230.000.000,00, equivalent to the amount of R$ 0,04098098 per share, considering the number of shares in circulation on December 11, 2023, with due regard to item 4.1.2 below, as follows:

1. the amount now distributed as interest on equity, pursuant to article 9 of Law No. 9.249/95, will be attributed to the mandatory dividends for fiscal year 2023, pursuant to applicable law;
2. the amounts per share are estimated and may be modified due to the sale of treasury shares to meet the Company's Stock Grant Plan or other share-based plans, or due to the purchase of shares under the Buyback Program;

INFORMAÇÃO PÚBLICA - PUBLIC INFORMATION

(Continuance of the minutes of the Extraordinary Meeting of the Board of Directors of B3 S.A. - Brasil, Bolsa, Balcão held on

December 21, 2023)

1. the aforementioned payment will be made on January 08, 2024, and will be based on the shareholding position December 28, 2023; and
2. the Company's shares will be traded on the "with" condition until December 28, 2023, inclusive, and on the "ex" condition of interest on equity and dividend, as of January 02, 2024.

5. Closing: There being no further business to be resolved, these minutes were drawn up and then approved and signed by all attending Directors. São Paulo, December 21, 2023. Signatures. Antonio Carlos Quintella, Ana Dolores Moura Carneiro de Novaes, Caio Ibrahim David, Claudia de Souza Ferris, Claudia Farkouh Prado, Cristina Anne Betts, Florian Bartunek, Guilherme Affonso Ferreira, Mauricio Machado de Minas, Pedro Paulo Giubbina Lorenzini and Mr. Rodrigo Guedes Xavier.

This is a true copy of the minutes recorded in the proper register.

Antonio Carlos Quintella

Chairman

INFORMAÇÃO PÚBLICA - PUBLIC INFORMATION