B3 S A Brasil Bolsa Balcão : 12/6/22172-2022-PRE-Circular LetterB3 Clearinghouse – New Block Trade Capture Process

December 06, 2022 172/2022-PRE

CIRCULAR LETTER

Listed B3 Participants

Re.: B3 Clearinghouse - New Block Trade Capture Process

B3 hereby informs you that on December 12, 2022 it will implement a new block trade capture process.

The new process foresees the aggregation of similar trades into periods that are parameterizable through a basic key, generating a block of trades with consolidated quantity information.

Each block is created at the end of the aggregation time limit or when the maximum quantity of trades is reached. For going into production, we will use thirty-second time parameters for the aggregation time limit and 200 trades for the maximum quantity in each block.

A block of trades will be transformed into a single consolidated transaction and will be processed in a similar way to any other transaction at the B3 Clearinghouse's platform. This will not generate mandatory changes to existing messages and files, only the creation of a new capture message containing details of the trades in the block.

The scope of the block trade capture process is limited to transactions with mini contracts (WIN and WDO) executed via direct market access (DMA) and carried

This document produces effects as of the date of its publication. Any specified time limits for validity shall apply.

This free translation into English from the original version in Portuguese is available for information purposes only, has not1 been reviewed by B3's legal counsel, and is therefore not legally binding. Any questions arising from this free translation

should be clarified by consulting the original version in Portuguese. In the event of any discrepancy between this free translation and the original version in Portuguese, the original version in Portuguese shall prevail.

INFORMAÇÃO PÚBLICA - PUBLIC INFORMATION

172/2022-PRE

out at an end client's account.

The functional and technical details of this new process are available at https://clientes.b3.com.br/en_us/roadmap/about/block-trade-capture.htm.

The Brokerage House Management System (SINACOR), in version 22.3, now has the capacity for the block trade capture process.

Participants that wish to take part in the tests must email [e-mail] which investors' accounts in the certification environment will be registered.

Participants that wish to use the new functionality in production must email [e-mail] the account number to be authorized.

The new block trade capture process is described in the B3 Clearinghouse Operating Procedures Manual, which will be available as of December 12, 2022, at www.b3.com.br/en_us/, Regulation, Regulatory framework, Regulations and manuals, Clearing, Settlement and risk management, Access the documents.

Further information can be obtained from Support for Settlement Processes and Services by telephone on [phone] or by email at [e-mail].

Gilson Finkelsztain	Mario Palhares
Chief Executive Officer	Chief Operating Officer - Electronic
	Trading and CCP

This document produces effects as of the date of its publication. Any specified time limits for validity shall apply.

This free translation into English from the original version in Portuguese is available for information purposes only, has not2 been reviewed by B3's legal counsel, and is therefore not legally binding. Any questions arising from this free translation

should be clarified by consulting the original version in Portuguese. In the event of any discrepancy between this free translation and the original version in Portuguese, the original version in Portuguese shall prevail.

INFORMAÇÃO PÚBLICA - PUBLIC INFORMATION