1 Exhibit 21.1 Subsidiaries of the Registrant 1. Neenah Foundry Company Hartley Controls Corporation - wholly owned. Neenah Transport, Inc. - wholly owned. Deeter Foundry, Inc. - wholly owned. Mercer Forge Corporation - wholly owned. Dalton Corporation - wholly owned. Advanced Cast Products, Inc. - wholly owned. Niemin Porter & Co. - wholly owned. 90