Companhia de Saneamento do Paraná SANEPAR : 126th EGM Call Notice

COMPANHIA DE SANEAMENTO DO PARANÁ (SANEPAR)

PUBLICLY HELD COMPANY

CVM REGISTRATION 01862-7 - CNPJ/MF 76.484.013/0001-45

CALL NOTICE OF THE

126th EXTRAORDINARY GENERAL MEETING

Date: April 29, 2024

Time: 3:00 p.m.

Venue: Sanepar Headquarters, Rua Engenheiros Rebouças, 1376, Curitiba/PR.

The shareholders are hereby summoned to meet at the extraordinary general meeting on April 29, 2024, at 3:00 p.m., at the Company's Headquarters, to resolve on the following

Agenda:

Item 1 - Dismissal of the member of the Eligibility Committee;

Item 2 - Election of the members of the Eligibility Committee;

Item 2 - Amendment to the Company's Consolidated Bylaws.

Shareholder attendance:

Shareholder attendance may be in person or through a duly appointed attorney-in-fact, or via the Remote Voting Form (BVD in Portuguese), with detailed guidelines on the documentation required for remote voting included in this guide.

Attending Shareholder

Shareholders that wish to attend the Shareholders' Meeting must check in, preferably, 30

minutes before the time scheduled in the Call Notice, with the following documents:

- Identity document (Identity Card (RG in Portuguese), Foreigner Identity Card (RNE in

Portuguese), National Migration Registry Card (RNM), Driver's License (CNH in

Portuguese), or officially recognized professional category card); and

Evidence of status as a Company shareholder, issued by a depositary financial institution, by a custody agent, or by a shareholding interest position issued by Sanepar.

Shareholders Represented by an Attorney-in-Fact

Shareholders who are unable to attend and wish to attend in the Shareholders' Meeting may appoint an attorney-in-fact with powers to represent them.

As provided for in the Brazilian Corporations Act (Law No. 6,404, of 12/15/1976, paragraph 1 of article 126), shareholders may be represented at the shareholders' meeting by an

attorney-in-fact appointed less than one (1) year before, who is a shareholder, manager, or attorney of the company. in a publicly held company, the attorney-in-fact may also be a financial institution, and the investment fund manager will be responsible for representing the joint owners.

In this regard, the necessary documents are:

- Power of attorney with special powers for representation at Sanepar's General Meeting, with notarization of the grantor's (shareholder) signature, as provided for in Law 6,404/76 or by qualified digital signature - with digital certification issued by a Certifying Authority, this being the only accepted format for powers of attorney sent digitally.

- Bylaws or Articles of Association and the instrument for electing/appointing managers, if the grantor is a legal entity; and

- Evidence of ownership of shares issued by the Company, issued by the depositary and/or custodian institution, or shareholding position issued by Sanepar.

- Remote Voting Form duly completed and signed.

Foreign Shareholder Attending the Meeting

The foreign shareholder must present the same documents as the Brazilian shareholder, with the exception that the documents must be notarized, consularized and apostilled, and with a sworn translation, as the case may be, in compliance with Decree No. 8,660, of January 29, 2016.

Remote Voting Form (BVD in Portuguese):

In order to comply with the regulations regarding shareholders' attendance, Sanepar will adopt the remote voting system under the terms of CVM Resolution No. 81/2022, which regulated articles 121 and 127 of Law 6,404/1976, allowing its shareholders to send remote voting bulletins through their respective custody agents, bookkeeper, or directly to the Company, according to the following guidelines:

Shareholders who choose to exercise their remote voting rights may: (i) transmit the completion instructions to their respective custodians; or (ii) to the bookkeeping agent for the shares issued by the Company; or (iii) complete and send the Form directly to the Company, as per the guidelines below:

(i) Voting exercised through custody agents

Shareholders who choose to exercise their right to vote remotely through their respective Company custody agent must transmit their voting instructions in compliance with the rules determined by such agent, who will forward said voting ballots to B3's Central Depository.

Shareholders must contact their respective custody agents to verify the procedures established by them for issuing voting instructions via form, as well as the documents and information required for this purpose.

(ii) Voting exercised through the bookkeeping agent

Shareholders who choose to exercise their right to vote remotely through their respective bookkeeping agent for shares issued by the Company must transmit their voting instructions observing the rules determined by the latter, who will forward said voting ballots to the Company. Shareholders must contact their respective bookkeeping agent for shares issued by the Company to verify the procedures they have established for issuing voting instructions via form, as well as the documents and information required for this purpose.

Institution contracted by the Company to provide securities bookkeeping services: Banco Bradesco S.A.

Núcleo Cidade de Deus - Prédio Amarelo, S/N 06029-900 - Osasco - SP

Service to shareholders: Telephone: [phone]

Email:[e-mail]

(iii) Voting directly to the Company - Shareholders who choose to exercise their right to vote remotely may do so directly to the Company through the electronic [e-mail], forwarding:

• (i) Remote voting form duly completed, initialed and signed; and

• (ii) certified copy of the following documents:

  • (a) for individuals: - identity document with photo of the shareholder;

  • (b) for legal entities: - the latest, restated, bylaws or articles of association and corporate documents that evidence the legal representation of the shareholder; and - identity document with a photo of the legal representative;

(c) for investment funds: - latest restated regulations of the fund; - bylaws; and - identity document with a photo of the legal representative.

Alternatively, the shareholder may physically send it, as well as the relevant documents, to

Sanepar's principal place of business, located at Rua Engenheiros Rebouças, 1376,

Curitiba, Paraná, Zip Code (CEP) 80215-900, for the attention of Governance Management - GGOV, observing the deadline.

When sending the form directly to the Company: If the Company finds that the form is not the latest version or if the form has not been correctly and fully completed, observing the questions pertinent to each type of action, or duly accompanied by the documents described in item (ii), the Form will be disregarded and the shareholder informed of the need for rectification through the email address "[e-mail]".

Also, the responsibility for sending the remote voting form and receiving it in time (D-7 =>04/22/2024) for the meeting lies with the Company's shareholder. Lastly, the deadline (D-7=>04/22/2024) for the shareholder to vote may vary according to weekends and holidays.

Forwarding of Representative Documents

To expedite the Meeting, it is requested that the documents required in the items above, enabling shareholders' attendance or representation at the Meeting, be sent, preferably, 72 hours in advance of the date scheduled for the Meeting, to: through the electronic [e-mail] with the Subject: 126th Extraordinary General Meeting, or physically to:

Companhia de Saneamento do Paraná (SANEPAR), For the attention of Governance Management - GGOV Rua Engenheiros Rebouças, 1376, Bairro Rebouças Curitiba, Paraná

CEP (Zip code) 80215-900

The Company's shareholders are responsible for sending any documents for them to be received in time for the meeting.

However, it is worth noting that, under the terms of paragraph 2 of article 5 of CVM Resolution No. 81/2022, shareholders who attend the Meeting with the required documents may participate and vote, even if they have not previously submitted them, as requested by the Company.

The following will be available to shareholders, on the Company's Investor Relations website (http://ri.sanepar.com.br) and on the CVM website (www.cvm.gov.br): documents relevant to the matters to be discussed at the Special Shareholders' Meeting, pursuant to the AGM above, in compliance with the provisions of CVM Resolution No. 81, of March 29, 2022, and Law No. 6,404, of December 15, 1976.

Curitiba, March 27, 2024.

Eduardo Francisco Sciarra

Interim Chairman of the Board of Directors

This is a free translation for informative purposes only, without any legal validity. The original text in Portuguese is the only legal version and must be consulted in order to elucidate any doubts or conflicts.