Significant Guidance Documents

This page lists all documents that the Antitrust Division has determined to be “significant guidance documents.”

Significant Guidance Documents of the Antitrust Division

Issued August 19 2010

Horizontal Merger Guidelines

Issued April 2, 1992; revised April 8, 1997

Archived: Horizontal Merger Guidelines

Issued June 14, 1984

Non-Horizontal Merger Guidelines


If you have comments on any of the Division’s significant guidance documents or wish to request the issuance, reconsideration, modification, or rescission of a significant guidance document, you may e-mail your comment or request to

Written comments, requests, or complaints may be mailed to:

U.S. Department of Justice, Antitrust Division
Legal Policy Section
950 Pennsylvania Ave., NW
Washington, DC 20530

When submitting a comment or complaint, please identify the particular guidance document you are addressing. Because comments may be available for public inspection, the Antitrust Division cautions commenters against including personal information such as social security numbers and birth dates.

For more details on agency guidance and its relationship to current or proposed Federal regulations, see

Updated July 2, 2015

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