Integrys Energy Group, Inc. Fact Sheet

Corporate Profile Regulated Utilities Map Integrys Energy Group, Inc. is a diversified energy holding company with regulated natural gas and electric utility operations (serving customers in , , Minnesota, and ), an approximate 34% equity ownership interest in American Transmission Company (a federally regulated electric transmission company), and nonregulated energy operations.

On June 23, 2014, Wisconsin Energy Corp. (NYSE: WEC) and Integrys Energy Group (NYSE: TEG) announced they entered into a definitive agreement under which Wisconsin Energy will acquire Integrys in a transaction valued at $9.1 billion. For more information, please visit the Transaction website at: http://www.integrysgroup.com/transaction/.

Stock Exchange Listing: New York Stock Exchange Ticker Symbol: TEG Listing Abbreviation: IntegrysEngy

Headquarters: , IL

Integrys Energy Group, Inc. - A Leading Midwest Energy Company Integrys Energy Group, Inc. Credit Ratings

Standard & Poor's Moody's Issuer Credit Rating A- * 74 Consecutive Years of Dividends Senior Unsecured Debt BBB+ A3 Commercial Paper A-2 P-2 Junior Subordinated Notes BBB Baa1 * Has not issued a credit rating.

Analysts Following Integrys Energy Group, Inc. Firm Analyst Argus Research Corporation Gary Hovis Barclays Research Daniel Ford Edward Jones Andy Pusateri J.J.B. Hilliard, W.L. Lyons, LLC David Burks Morningside Charles Fishman Standard & Poor's Chris Muir

SunTrust Robinson Humphrey Ali Agha U.S. Capital Advisors LLC Dan Fidell Value Line Paul Debbas

Wellington Shields Maury May Corporate Citizenship

GO TO http://www.integrysgroup.com/corporate or scan this QR code with your smartphone to access our Recent News Releases Corporate Citizenship Report. 3/03/2015 amp Trillium Holds Grand Opening for First Public Access CNG Station in Jacksonville, Fla.

2/25/2015 Integrys Energy Group, Inc. Reports Fourth Quarter 2014 Earnings Stock Investment Plan 2/25/2015 amp Trillium Opens Jacksonville, Florida's First Public Access We offer a Stock Investment Plan (Plan) for the direct purchase of our Compressed Natural Gas Station common stock. The Plan offers dividend reinvestment and makes investing in our common stock convenient and affordable. For more information, see our website at www.integrysgroup.com. Click on Investors and then Stock 2/16/2015 Trillium CNG Inks Deal With Monterey Regional Waste Investment Plan. Management District in Calif.

Stock Price History Contact Information High ($) Low ($) Investor Relations One Day 72.92 71.75 For General Inquiries: One Month 74.83 70.34 (800) 228-6888 8:00 AM - 4:30 PM CT Three Months 83.72 70.34 Monday - Friday Year-to-Date 83.72 70.34 Fax: 312-240-5404 [email protected] One Year 83.72 56.46

Integrys Energy Group, Inc. Three Year 83.72 51.02 Attn: Investor Relations Three Year Date 1/28/2015 4/11/2012 200 East Randolph Street Chicago, IL 60601

For Institutional Investor/Financial Analyst Inquiries: Stock Price and Market Data Steven P. Eschbach, CFA Vice President - Investor Relations (312) 228-5408 Current Quote Data as of April 10, 2015 [email protected] Last Sale $ 72.71 Donna M. Sheedy Last Close $ 71.68 Manager - Investor Relations Today's High $ 72.92 (920) 433-1857 [email protected] Today's Low $ 71.75 Net Change $ 1.03 1.44% Connect With Us: Today's Volume 207,866 @TEGinvestors on 52wk Range $ 70.34 - $ 83.72 Market Cap ($MM) 5,782.93 Minimum 20 minute delay Shareholder Services Current Chart Transfer Agent and Registrar: American Stock Transfer & Trust Company, LLC (800) 236-1551 (toll free) (718) 921-8124 (international) 7:00 AM - 7:00 PM CT Monday - Friday E-mail: [email protected] Fax: 718-236-2641 Website: www.amstock.com

For Dividend Reinvestment and Direct Stock Purchase: American Stock Transfer & Trust Company, LLC Wall Street Station P.O. Box 922 New York, NY 10269-0560 (800) 236-1551 (toll free)

Upcoming Events Ex-Dividend Date for Quarterly Dividend * 5/27/2015 Earnings Release – First Quarter 2015 (after market closes) 5/5/2015

*Dividend payments are subject to approval by the Board of Directors

This fact sheet is prepared for the information of our investors and is not given in connection with the sale of any security or offer to sell or buy any security.