A PowerPoint presentation that can be used by counsel to provide an overview of the preliminary antitrust risk analysis in a proposed transaction to the client, members of a deal team, or other lawyers. This presentation includes a summary of how the antitrust agencies analyze mergers under the Merger Guidelines and a framework to present the antitrust risk analysis, including market definition, market shares, market concentration using the Herfindahl-Hirschman Index (HHI), competitive effects, entry, efficiencies, the failing or weakened firm defense, and the likelihood of an investigation, Second Request, divestitures, or litigation.