ReferenceUSA, a database of 15 million businesses in the United States, searchable by corporate name, location, and industry. Entries provide links to parents and subsidiaries. (Rutgers-restricted Access)
LexisNexis Corporate Affiliations (DANA Business Reference, CARR Business Counter 1). Includes key officers, addresses and products of over 28,000 companies. Arranged in 3 sections: foreign parent companies with international subsidiaries and divisions; US parent companies with foreign holdings; and a geographical index.
Who Owns Whom series from Dun & Bradstreet: there are volumes for Asia, Europe, North America. Check the library catalog for specific call numbers.