SUBSIDIARIES Jurisdiction of Name Ownership _Incorporation_ AP Venture Corp. III 100% owned by Ampco-Pittsburgh Corporation Delaware Aerofin Corporation 100% owned by Ampco BFC Sub, Inc. New York Ampco NCII Sub, Inc. 100% owned by Delaware New Castle Industries, Inc. Ampco-Pittsburgh Securities 100% owned by III Corporation Ampco-Pittsburgh Corporation Delaware Ampco-Pittsburgh Securities 100% owned by V Corporation Ampco-Pittsburgh Corporation Delaware Ampco UES Sub, Inc. 100% owned by Union Electric Steel Corporation Delaware Buffalo Pumps, Inc. 100% owned by Ampco-Pittsburgh Corporation Delaware New Castle Industries, Inc. 100% owned by Ampco UES Sub, Inc. Pennsylvania Union Electric Steel 100% owned by Corporation Ampco-Pittsburgh Securities V Corporation Pennsylvania Union Electric Steel N.V. 100% owned by Canadian Blower/ Canada Pumps Limited Belgium The financial statements of all subsidiaries have been consolidated with those of the Corporation. Names of other subsidiaries have been omitted because, considered in the aggregate as a single subsidiary, they would not constitute a significant subsidiary. Exhibit 21