Companhia Paranaense de Energia : Aquisição/Alienação de Participação Acionária

COPEL

2017

COMPANHIA PARANAENSE DE ENERGIA - COPEL

CNPJ nº 76.483.817/0001-20 Companhia de Capital Aberto

Registro CVM nº 1431-1

Registro SEC (CUSIP) 20441B407 - Preferenciais "B"

Registro SEC (CUSIP) 20441B308 - Ordinárias Registro LATIBEX 29922 - Preferenciais "B"

COMUNICADO AO MERCADO

A Companhia Paranaense de Energia - COPEL, empresa que gera, transmite, distribui e comercializa energia, com ações listadas na B3 (CPLE3, CPLE5, CPLE6), na NYSE (ELP) e na LATIBEX (XCOP), em atendimento ao Art. 12 da Instrução CVM nº 358/02, comunica aos seus acionistas e ao mercado em geral, que recebeu da Wellington Management Group LLP, em nome de alguns de seus clientes, na qualidade de gestora de investimentos, a informação de que reduziu sua participação de forma agregada para 6.340.628 ações preferenciais classe "B", que correspondem a 4,94% do total de ações PNB de emissão da COPEL, conforme correspondência abaixo.

Curitiba, 15 de Janeiro de 2018

Adriano Rudek de Moura

Diretor de Finanças e de Relações com Investidores

WELLINGTON MANAGEMENT GROUP LLP

280 Congress Street. Boston, Massachusetts 02210 USA

T +1 617.951.5000| F +1 617.95l.5000| F +1 617.951.5000 Client Servicewww.wellihgton.com

15th January 2018

Companhia Paranaense de Energia Attn.: Mariceli Schmidt dos Santos Investor Relations

Email:[e-mail]

Rua Coronel Dulcídio, 800 - Batel CEP: 80420-170

Curitiba - Paraná

Ref: Decrease of significant ownership interest in Companhia Paranaense de Energia

Dear Sir /Madam,

Wellington Management Group LLP ("Wellington Management"), a limited liability partnership validly existing under the laws of the Commonwealth of Massachusetts, USA, headquartered at 280 Congress Street, Boston, Massachusetts, 02210, USA, in its capacity as the ultimate parent company to a series of companies that exercise investment management activities with clients outside of Brazil (the "Wellington Entities") and on their behalf, in compliance with Article 12 of the CVM Instruction No. 358, dated January 3, 2002, as amended ("CVM Instruction 358"), hereby informs that the portfolios of clients under the Wellington Entities' management (the "Accounts") have sold, through certain transactions on stocl< exchanges, certain shares issued by Companhia Paranaense de Energia ("Company"), thus holding currently 6,174,100 preferred shares, representing 4.81% of all preferred shares issued by the Company (on the basis of a total number of outstanding preferred shares 128,295,668), and 166,528 ADRs, representing 0.13% (on the basis of a total number of outstanding preferred shares 128,295,668).

Wellington Management also informs that the Wellington Entities have proxy voting rights on behalf of certain Accounts, in connection with the discretionary management powers.

This is a minority investment that does not involve a change in the composition of corporate control or a change in the management structure of the Company. Currently, the Wellington Entities do not intend to purchase for the Accounts any additional shares of the Company with the intent to acquire control or to change the management structure of the Company.

Please do not hesitate to contact us should you need any further clarifications. For any matters relating to this letter, please contact Taisia Lowe at [phone].

For purposes of Article 119 of Law 6,404, of December 15, 1976, as amended, the representative(s) in Brazil of the Accounts are listed below:

AMERICANSHIP + CO CACTUSMARSH + CO DEEPANCHOR CO FINWELL & CO IRISHSAIL CO

LONGREEF + CO

MEXICANBLANKET + CO

THE HARTFORD INTERNATIONAL VALUE FUND

USAA INTERNATIONAL FUND

ARCADE & CO.

ARKANSAS TEACHER RETIREMENT SYSTEM BANK OF NEW YORK MELLON

Deutsche Bank S.A. - Banco Alemão

DOMINION RESOURCES, INC. MASTER TRUST EMPLOYEES' RETIREMENT SYSTEM OF THE ST OF HI

FINWELL + CO

FMAP WMC LIMITED

GENERAL PENSION AND SOCIAL SECUHTY AUTHORITY

GLOBAL OPPORTUNITIES FUND LIMITED

HARTFORD LONG/SHORT GLOBAL EQUIT

HEWLETT-PACKARD COMPANY MASTER TRUST HIGHLAND COLLECTIVE INVESTMENT TRU HIGHLAND PUBLIC INFLATION HEDGES F

HP INVEST COMMON CONTRACTUAL FUND ITALIANCOAL + CO.

JPM SP(DTVM),]PMCB NA FBO ALL OTHER Lockheed Martin Corporation Master Retirement Trust

MEXICANDOLPHIN & CO.

MULTI-ADVISOR FUNDS INTERNATIONAL EQUITY VALUE FUND NEBRASKA PUBLIC EMPLOYEES RETIREMENT SYSTEMS

Salt River Pima-Maricopa Indian Community

SQUIDISLAND + CO

TELUS PENSIONS MASTER TRUST

THE WELLINGTON TRUST COMPANY NATIONAL ASSOCIATION MULTIPLE COLLECTIVE INVESTMENT FUNDS TRUST

THE WELLINGTON TRUST COMPANY, NATIONAL ASSOCIATION MULTIPLE COMMON TRUST FUNDS TRUST GLOBAL PERSPECTIVES PORTFOLIO

WELLINGTON GLOBAL PERSPECTIVES FUND (CANADA) WELLINGTON MANAGEMENT FUNDS (IRELAND) PLC

WELLINGTON MANAGEMENT FUNDS (LUXEMBOURG) - WELLINGTON GLOBAL CAPITAL

CYCLES LONG-SHORT FUND D30

WELLINGTON TRUST COMPANY N.A.

WILMINGTON MULTI-MANAGER ALTERNATIVES FUND

WORKPLACE HEALTH, SAFETY AND COMPENSATION COMMISSION OF NEW BRUNSWICK

Kind regards,

Wellington Management Group LLP

____________________________

James Wilson

Authorized Person