SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer
Pursuant to Rule 13a-16 or 15d-16 of the

Securities Exchange Act of 1934

For the month of March, 2026

Commission File Number 1-14668

COMPANHIA PARANAENSE DE ENERGIA

(Exact name of registrant as specified in its charter)

Energy Company of Paraná

(Translation of Registrant's name into English)

José Izidoro Biazetto, 158
81200-240 Curitiba, Paraná
Federative Republic of Brazil
+55 (41) 3331-4011

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F. Form 20-F ___X___ Form 40-F _______

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes _______ No ___X____

COMPANHIA PARANAENSE DE ENERGIA - COPEL Registration as Corporate Taxpayer (CNPJ): 76.483.817/0001-20 NIRE 41300036535 Brazilian SEC Registration: 1431-1 B3 (CPLE3) NYSE (ELP, ELPC) LATIBEX (XCOP, XCOPO) ANNUAL GENERAL MEETING AND EXTRAORDINARY GENERAL MEETING CALL NOTICE The Shareholders of Companhia Paranaense de Energia - Copel are invited to attend the Annual General Meeting to be held exclusively in digital mode, pursuant to art. 124 of Law no. 6404/76 - Brazilian Corporation Law and CVM Resolution no. 81/2022 - RCVM 81, on April 23, 2026, at 2 p.m., on first call, and will therefore be considered to be held at the Company's headquarters, via Ten Meetings digital platform (https://assembleia.ten.com.br/008148610), to decide on the following agenda: ANNUAL GENERAL MEETING 1. Annual Management Report, Management Statements and Financial Statements for fiscal year 2025; 2. Management's proposal for the Capital Budget for fiscal year 2026; 3. Management's proposal for the allocation of net profit for 2025 and distribution of dividends; 4. Setting up of the Supervisory Board, considering the nomination of candidates by shareholders, in accordance with the applicable law; 5. If the Supervisory Board is set up, election of three regular members and their respective alternates; and 6. Establishment of the global compensation for Management, Supervisory Board members (if elected), and members of Statutory Committees for the fiscal year 2026. EXTRAORDINARY GENERAL MEETING 1. Election of a member of the Board of Directors to serve the unified term ending at the ordinary general meeting that reviews the management’s accounts and the Company’s financial statements for the fiscal year ending December 31, 2026; and 2. Resolution on the compliance of the elected member of the Board of Directors with the independence criteria established in CVM and Novo Mercado regulations. Documents referring to the matters to be discussed at the Annual General Meeting, including the Management’s Proposal and the Manual for Participation in General Shareholders’ Meetings, are available for shareholders’ consultation at the Company’s headquarters as well as on its website (ri.copel.com). The Meeting will be held exclusively online, in order to promote greater accessibility for shareholders and increase efficiency in the organization and execution of the proceedings. Accordingly, shareholders may participate by: (a) through a ballot paper, the template for which is available to shareholders on the following websites: the Company’s (ri.copel.com), Brasil, Bolsa, Balcão - B3 and Brazilian Securities and Exchange Commission (CVM); or (b) via digital platform (Ten Meetings), which shall be accessed personally or by a dully appointed proxy, according to RCVM 81. Shareholders may participate in the Meeting whether or not they have sent in the ballot paper. If they have sent it and choose to also participate in the Meeting, they may change the votes cast via Ballot by expressing this decision at the beginning of the Meeting. The Ballots may be sent, under the terms of RCVM 81, through the shareholders' custody agents, to the Central Depositary of B3 or, if the shares are in a book-entry environment, to the bookkeeper (Itaú Corretora de Valores S.A.) or, also, directly to the Company, in accordance with the guidelines set out in the Proposal, by April 19, 2026 or, in the case of service providers, within the period respectively set by them. To participate in the Meeting via Digital Platform, up to 2 days before the Meeting is held, that is, until April 21, 2026, the shareholder must access the Ten Meetings platform (https://assembleia.ten.com.br/008148610), fill in all the registration data and attach all the documents necessary for their qualification to participate and/or vote in the Meeting: • Natural Person Shareholder: a) valid identification document with photo of the shareholder and the proxy, if applicable; b) instrument granting powers to a third party, if the shareholder participates through a proxy; and c) indication of an e-mail address to receive an individual invitation to access the Digital Platform and consequently participate in the Meeting. • Legal Entity Shareholder or Investment Fund: a) valid identification document with photo of the legal representative; b) documents proving representation, including a copy of the minutes of the election of the director(s) who represent the shareholder attending the Meeting or who, as the case may be, grant(s) the power of attorney to attend the Meeting, and the power of attorney; c) in the case of an investment fund, copies of: i. regulations of the fund in effect; ii. the articles of association or bylaws of its manager or administrator, as the case may be, in compliance with the fund's voting policy; and d) indication of an e-mail address to receive an individual invitation to access the Digital Platform and consequently participate in the Meeting. For participation by proxy, the granting of powers of representation must have taken place less than one year previously, pursuant to article 126, paragraph 1 of the Corporate Law. In addition, in compliance with the provisions of article 654, paragraph 1 and paragraph 2 of the Civil Code, the power of attorney must contain an indication of the place where it was given, the full qualifications of the grantor and the grantee, the date and purpose of the grant with the designation and extent of the powers conferred, containing the signature of the grantor. Natural persons who are shareholders of Copel may only be represented at the Meeting by a proxy who is a shareholder, officer of the Company, lawyer or financial institution, as provided for in art. 126, §1 of the Brazilian Corporation Law. Legal entities that are shareholders of the Company may be represented by a proxy appointed in accordance with their articles of association or bylaws and in accordance with the rules of the Civil Code, without the need for such person to be an officer of the Company, a shareholder or a lawyer (Proc. CVM RJ2014/3578, j. 4.11.2014) Shareholders who fail to register and/or report the absence of receipt of access instructions in the manner and within the time limits set out above and in the Proposal will not be able to participate in the Meeting. On the date of the Meeting, the shareholder's attendance will only be recorded by accessing the electronic system, in accordance with the instructions and within the times and deadlines published by the Company. In addition, as provided for in article 161, paragraph 2, of the Brazilian Corporation Law, along with RCVM 70, shareholders who jointly represent 2% of the Company's voting shares are entitled to set up the Supervisory Board. Under the terms of RCVM 81, additional information and instructions for accessing the Digital Platform and/or sending the Ballots can be found in the Proposal. Curitiba, March 23, 2026 Marcel Martins Malczewski Chairman of the Board of Directors

CNPJ 76.483.817/0001-20 - NIRE 41300036535 - CVM Registration no. 1431

B3 (CPLE3) / NYSE (ELPC) / LATIBEX (XCOPO)

COPEL wins capacity reserve auction with two hydro power plants

COPEL (“Company”) hereby informs its shareholders and the market in general that it has been successful in the Capacity Reserve Auction in the form of Power, referred to as LRCAP 2026 (“Auction” or “LRCAP”). On this date, the Company was declared the winner for the sale of the Power product, contributing a total of 1,862.8 MW of installed capacity to be contracted for a 15-year term, with fixed gross revenue set at R$ 963.2 million/MW/year for the Foz do Areia Hydro Power Plant (“FDA”) and R$ 1,635.4 million/MW/year for the Segredo Hydro Power Plant (“Segredo”). The start of operations is scheduled for August 2030 for both FDA and Segredo.

The table below provides additional information on the projects:

	FDA HPP	Segredo HPP
Installed capacity available for LRCAP (MW)1	690.470	1,172.344
Physical guarantee related to expansion (average MW)2	20.6	56.3
Power generation term	15 years	15 years
Estimated start of operation	August 2030	August 2030
Contracted gross price (R$ thousand/MW/year)3	R$ 1,395.00	R$ 1,395.00
Estimated investment (R$ billion – Base Date Mar/26)	R$ 1.3	$3.6
Estimated leverage	70%	70%
Transmission System Usage Fee – TUST (R$/kW/month)4	R$ 5.75 – R$ 6.10	R$ 6.73 – R$ 7.19

¹Total installed capacity adjusted by the Capacity Availability Factor (FDispCap) for the Segredo project, and by the Reference Storage parameter for the Foz do Areia project; 2Energy available for sale in the Free Contracting Environment (ACL); 3Amount to be updated annually based on the variation of the IPCA index, with a base date of September 2025; 4Amount to be updated annually based on the variation of the IPCA and/or IGPM indices, with a base date of June 2025, and calculated over the project’s total installed capacity – 860 MW for Foz do Areia and 1,266 MW for Segredo.

The contracted projects represent another step in the execution of the Company’s high-value creation strategy with controlled risks, as they strengthen the competitiveness of the portfolio, enhance the system’s operational flexibility, create opportunities for organic growth, and increase the value of existing assets.

Curitiba, March 18, 2026

Felipe Gutterres

Vice President of Finance and Investor Relations

For further information, please contact the Investor Relations team: ri@copel.com or (41) 3331-4011

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date March 1823, 2026

COMPANHIA PARANAENSE DE ENERGIA – COPEL

By:	/S/ Daniel Pimentel Slaviero
	Daniel Pimentel Slaviero Chief Executive Officer

FORWARD-LOOKING STATEMENTS

This press release may contain forward-looking statements. These statements are statements that are not historical facts, and are based on management's current view and estimates of future economic circumstances, industry conditions, company performance and financial results. The words "anticipates", "believes", "estimates", "expects", "plans" and similar expressions, as they relate to the company, are intended to identify forward-looking statements. Statements regarding the declaration or payment of dividends, the implementation of principal operating and financing strategies and capital expenditure plans, the direction of future operations and the factors or trends affecting financial condition, liquidity or results of operations are examples of forward-looking statements. Such statements reflect the current views of management and are subject to a number of risks and uncertainties. There is no guarantee that the expected events, trends or results will actually occur. The statements are based on many assumptions and factors, including general economic and market conditions, industry conditions, and operating factors. Any changes in such assumptions or factors could cause actual results to differ materially from current expectations.

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