Centro de Imagem Diagnósticos S A : Share Buyback Program

Material Fact

CENTRO DE IMAGEM DIAGNÓSTICOS S.A. ('Company') pursuant to Article 157, paragraph 4 of Law 6,404/76, of December 15, 1976, as amended ('Brazilian Corporate Law'), and Instruction 358/02 issued by the Brazilian Securities and Exchange Commission ('CVM') on January 3, 2002, as amended ('CVM Instruction 358'), hereby informs its shareholders and the market in general that, at a meeting held on this date, its Board of Directors approved a new Share Buyback Program, through which the Company may acquire up to 1.730.000 (one million seven hundred and thirty thousand) non-par, registered, book-entry common shares, equivalent to approximately 3.95% of all its common shares on free float, in accordance with the following conditions ('Share Buyback Program'):

• Purpose of the Share Buyback Program:

The purpose of the Company's Share Buyback Program is to (i) enable the granting of restricted shares within the scope of the Company's share-based compensation plan; (ii) for the eventual payment of companies acquisitions, in compliance with the applicable regulations; and (iii) maintain shares in treasury for subsequent cancelation or sale on the market.

The shares object of the Share Buyback Program will be acquired in up to eighteen (18) months, between May 27, 2021 and November 25, 2022. The members of the Company's Board of Executive Officers will determine the best time for acquiring the shares.

• Funds to be used on the acquisition:

The shares under the scope of the Share Buyback Program will be acquired with funds from the Company's 'Capital Reserve' account.

• Authorized financial institutions:

The acquisitions under the scope of the Share Buyback Program will be carried out on B3, with the intermediation of the following financial institutions: BofA Merrill Lynch, Itaú Corretora and XP.

Additional information on the Share Buyback Program, including the information required under CVM Instructions 567/15 and 480/09, will be available to the shareholders on the Company's headquarters, on its Investor Relations website (http://ri.alliar.com), and on the websites of the Brazilian Securities and Exchange Commission (www.cvm.gov.br) and the B3 (www.b3.com.br).

São Paulo, May 27, 2021

For more information, access ourIR website.

IR Contact

Gabriel Bouzada Rozenberg
Investor Relations Officer
E-mail:[e-mail]