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( Mark One ) ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number None 001-09057 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON , DC 20549 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 FORM 10 - K For the fiscal year ended December 31 , 2020 For the transition period from Title of Each Class Common Stock , $ .01 Par Value Yes > No Securities registered pursuant to Section 12 ( b ) of the Act : Registrant ; State of Incorporation ; Address ; and Telephone Number Securities registered pursuant to Section 12 ( g ) of the Act : to WEC Energy Group WEC ENERGY GROUP , INC . ( A Wisconsin Corporation ) 231 West Michigan Street P.O. Box 1331 Milwaukee , WI 53201 ( 414 ) 221-2345 Trading Symbol ( s ) WEC IRS Employer Identification No. 39-1391525 Indicate by check mark if the Registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Name of Each Exchange on Which Registered New York Stock Exchange Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes No 区