Morningstar (MORN) 8-K Morningstar, Inc. Declares Regular Quarterly Dividend of 12.5 Cents Per Share

Exhibit 99.1

Media Contact:

Margaret Kirch Cohen, +1 312-696-6383 or margaret.cohen@morningstar.com

FOR IMMEDIATE RELEASE

Morningstar, Inc. Declares Regular Quarterly Dividend of 12.5 Cents Per Share

CHICAGO, Oct. 4, 2013—The board of directors of Morningstar, Inc. (NASDAQ: MORN), a leading provider of independent investment research, today declared a quarterly dividend of 12.5 cents per share. The dividend is payable Oct. 31, 2013 to shareholders of record as of Oct. 14, 2013.

About Morningstar, Inc.

Morningstar, Inc. is a leading provider of independent investment research in North America, Europe, Australia, and Asia. The company offers an extensive line of products and services for individuals, financial advisors, and institutions. Morningstar provides data on approximately 433,000 investment offerings, including stocks, mutual funds, and similar vehicles, along with real-time global market data on nearly 10 million equities, indexes, futures, options, commodities, and precious metals, in addition to foreign exchange and Treasury markets. Morningstar also offers investment management services through its registered investment advisor subsidiaries and has approximately $166 billion in assets under advisement and management as of June 30, 2013. The company has operations in 27 countries.

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