B3 S A Brasil Bolsa Balcão : 4/12/23 049-2023-PRE-Circular Letter Subscription Warrant Pricing Model for the Primary Public Offering of DASA Equities and Processing of Securities Lending Positions

April 12, 2023 049/2023-PRE

CIRCULAR LETTER

Listed B3 Participants

Re.: Subscription Warrant Pricing Model for the Primary Public Offering of DASA Equities and Processing of Securities Lending Positions

On April 4, 2023, Diagnóstica da América S.A. (Dasa, or Company) announced in a material event notice a primary public offering of 176,470,590 ordinary shares, amounting to BRL 1,500,000,015,00, in an automatic registration offering as described in CVM Resolution 160/2022, granting priority rights for shareholders in the Company to subscribe for up to all of the equities in the offering, considering those holding equities on April 3, 2023, to the proportion of their respective equity interest in the Company on April 13, 2023, with settlement of the offering scheduled for April 24, 2023.

The Company also announced that an additional one subscription warrant will be delivered for every ten newly subscribed equities.

Each subscription warrant will grant the investor the right to subscribe for one new equity within 24 hours of settlement of the offering and at the same price as the issued equities, in windows to be set by the board of directors of the Company.

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

049/2023-PRE

The processing of equities securities lending positions will occur as set out in item

7.9.3 (Processing corporate actions for equities securities lending positions), subitem 5 ii (Priority offerings of assets) of the B3 Clearinghouse Operating Procedures Manual (Manual), taking place on the settlement date of the public offering.

For lenders who subscribed for equities based on their securities lending positions, as set out in the procedures described in item 7.9.3, subitem 5 ii of the Manual, the subscription warrant will be cash settled on the offering's settlement date by debiting from the borrower and crediting to the lender in the B3 Clearinghouse's multilateral net settlement window.

The settlement price of the subscription warrant will be defined at the closing call of the trading session that precedes the offering's settlement date. If there are no transactions during that day's closing call, the reference price defined by B3 will be used.

The subscription warrant reference price will be calculated using the Black & Scholes European call option model, considering as the maturity the last 24- month term as of the offering's settlement date, and considering the price defined in the offering in question as the exercise price.

Volatility will be calculated in accordance with the volatility model in Annex A of the B3 Corporate Actions Pricing Manual. The Black & Scholes formula is available in section 1.1. of the B3 Pricing Manual - Options. These manuals are available at https://www.b3.com.br/en_us/, Market data and indices, Data services, Market Data, Reports, Derivatives, Methodology, B3 Pricing Manual.

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

049/2023-PRE

Further information can be obtained from Support for Settlement Processes and Services by telephone on [phone], option 2, 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 not3 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