ALLETE Board of Directors Declares Dividend on Common Stock

DULUTH, Minn.–(BUSINESS WIRE)–The ALLETE, Inc. (NYSE:ALE) board of directors has declared a quarterly
dividend of 56 cents per share of common stock.

On an annual basis the dividend is equivalent to $2.24 per share,
unchanged from the previous quarter.

The regular quarterly dividend is payable June 1 to common stock
shareholders of record at the close of business May 15, 2018.

ALLETE is an energy company headquartered in Duluth, Minn. In addition
to its electric utilities, Minnesota Power and Superior Water, Light and
Power of Wisconsin, ALLETE owns ALLETE Clean Energy, based in Duluth,
BNI Energy in Bismarck, N.D., U.S. Water Services headquartered in St.
Michael, Minn., and has an eight percent equity interest in the American
Transmission Co. More information about ALLETE is available at www.allete.com.
ALE-CORP

The statements contained in this release and statements that ALLETE
may make orally in connection with this release that are not historical
facts, are forward-looking statements. These forward-looking statements
involve risks and uncertainties and investors are directed to the risks
discussed in documents filed by ALLETE with the Securities and Exchange
Commission.

Contacts

ALLETE, Inc.
Investor Contact:
Vince Meyer,
218-723-3952
[email protected]