This document summarizes twenty cases of successful private antitrust enforcement. These twenty summaries build on earlier summaries of forty additional cases of successful private enforcement available at http://ssrn.com/abstract=1105523. An analysis of the data from the original forty cases is available at http://ssrn.com/abstract=1090661 (published as Robert L. Lande and Joshua P. Davis, Benefits From Private Antitrust Enforcement: An Analysis of Forty Cases, 42 U.S.F. L. REV. 879 (2008)) and an argument based on the forty cases that private antitrust enforcement has greater deterrence effects than criminal enforcement by the Department of Justice is available at http://ssrn.com/abstract=1565693 (published as Robert L. Lande and Joshua P. Davis, Comparative Deterrence from Private Enforcement and Criminal Enforcement of the U.S. Antitrust Laws, 2011 B.Y.U. L. REV. 315).