MGE Energy(MGEE) - 2021 Q2 - Quarterly Report

United States SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended: June 30, 2021 ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from _______________ to _______________ Name of Registrant, State of Incorporation, Address of Principal Executive Offices, and Telephone No. IRS Employer Identification No. 39- ...