EXHIBIT 21 Subsidiaries of Silgan Holdings Inc. Silgan Corporation Silgan Plastics Corporation1 827599 Ontario Inc. (Canadian Holdco.)2 Express Plastic Containers Limited3 Silgan Containers Corporation1 California-Washington Can Corporation4 SCCW Can Corporation4 828745 Ontario Inc. (NRO, Ltd.)1 - -------- 1 Wholly-owned subsidiary of Silgan Corporation. 2 Wholly-owned subsidiary of Silgan Plastics Corporation. 3 Wholly-owned subsidiary of Canadian Holdco. 4 Wholly-owned subsidiary of Silgan Containers Corporation.