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 April, 2016

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)

Rua Coronel Dulcídio, 800
80420-170 Curitiba, Paraná
Federative Republic of Brazil
(5541) 3222-2027

(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
Corporate Taxpayer’s ID (CNPJ): 76.483.817/0001-20
PUBLICLY-HELD COMPANY
CVM Registration: 1431-1
SEC Registration (CUSIP) 20441B308 – Common Shares
SEC Registration (CUSIP) 20441B407 – Class B Preferred Shares
LATIBEX Registration 29922 – Class B Preferred Shares

NOTICE TO SHAREHOLDERS

Companhia Paranaense de Energia - COPEL, hereby announces that as of today, the documents referred to in article 133 of Law 6404 of December 15, 1976 for the fiscal year ended December 31, 2015 are at the shareholders’ disposal at the Financial and Investor Relations Department, at Rua Coronel Dulcídio, nº 800, 3º andar, in this capital city.

Curitiba, March 17, 2016

Luiz Eduardo da Veiga Sebastiani

Chief Financial and Investor Relations Officer

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: April 04, 2016

COMPANHIA PARANAENSE DE ENERGIA – COPEL
By:	/S/  Luiz Fernando Leone Vianna
	Luiz Fernando Leone Vianna 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.