EXHIBIT 21 SUBSIDIARIES OF REGISTRANT Wind River Systems, E.C., S.A.R.I., a French corporation. Wind River Systems GmbH, a German corporation. Wind River Systems UK, Ltd., a United Kingdom corporation. Wind River Systems K.K., a Japanese corporation a majority (70%)-owned subsidiary Wind River Systems Italia, S.r.l., an Italian corporation. Wind River Systems International, Inc., a U.S. corporation.