EXHIBIT 21 SUBSIDIARIES OF INDIVIDUAL INVESTOR GROUP, INC. Subsidiary State of Organization Individual Investor Holdings, Inc. Delaware WisdomTree Capital Management, Inc. New York I.I. Strategic Consultants, Inc. (inactive) Delaware WisdomTree Administration, Inc. (inactive) Delaware I.I. Interactive, Inc. Delaware Advanced Marketing Ventures, Inc. (inactive) Delaware WisdomTree Capital Advisors, LLC (inactive) New York