EXHIBIT 21 SUBSIDIARIES OF THE COMPANY Jurisdiction of Incorporation or Name of Subsidiary Organization - ------------------ ---------------- Dow Jones AER Company, Inc. Delaware Economic Research Company, Inc. Delaware Dow Jones BD Services, Inc. Delaware Dow Jones Broadcasting (Asia), Inc. Delaware Dow Jones Broadcasting (Europe), Inc. Delaware Dow Jones Broadcasting (USA), Inc. Delaware Dow Jones Canada, Inc. Canada Dow Jones Financial Publishing Corp. Delaware Dow Jones Information Publishing, Inc. Delaware Dow Jones Information Services International (HK) Ltd. Hong Kong Dow Jones International GmbH Germany Dow Jones International Ltd. United Kingdom Dow Jones International Marketing Services Delaware Dow Jones (Japan) K.K. Japan Dow Jones Newsprint Company, Inc. Delaware Dow Jones Printing Company (Asia), Inc. Delaware Dow Jones Publishing Company (Asia), Inc. (90% owned) Delaware Dow Jones Publishing Company (Europe), Inc. Delaware Dow Jones Real Estate Development Corp. Delaware Dow Jones Southern Holding Company, Inc. Delaware Dow Jones Ventures II, Inc. Delaware Dow Jones Ventures III, Inc. Delaware Dow Jones Virginia Company, Inc. Delaware Federal Filings, Incorporated Delaware IDD Enterprises, L.P. Delaware National Delivery Service, Inc. Delaware Ottaway Newspapers, Inc. Delaware Essex County Newspapers, Inc. Massachusetts News-Sun, Inc. Arizona ONI Press, Inc. Delaware Research and Marketing Solutions, Inc. Delaware The Inquirer & Mirror, Inc. Massachusetts Portuguese-American Publications, Inc. Massachusetts Review Publishing Company Limited Hong Kong The China Phone Book Co. Ltd. Hong Kong All of the above subsidiaries are included in the consolidated financial statements.