MGE Energy: Declares 3-for-2 stock split

Madison, Wis., Dec. 20, 2013—The Board of Directors of MGE Energy, Inc.
(Nasdaq: MGEE) today declared a 3-for-2 stock split in the form of a common
stock dividend. The stock split is expected to help keep the stock
affordable for investors.

The common stock dividend is payable Feb. 7, 2014, to shareholders of
record at the close of business on Jan. 24, 2014.

“The stock split underscores the confidence the Board of Directors has in
our company’s long-standing commitment to shareholder value,” said Gary
Wolter, chairman, president and CEO.

Earlier in 2013, the Board of Directors voted to increase MGE Energy’s cash
dividend for the 38th consecutive year.

The company’s last stock split was in 1996 when a 3-for-2 stock dividend
was issued.

Visit: www.mgeenergy.com.