Waupaca Foundry

Waupaca Foundry, Inc. is an American company founded in 1955 that is among the largest independent iron foundries in the world. Formerly known as ThyssenKrupp Waupaca, it produces gray, ductile, and compacted graphite iron castings.

Based in Waupaca, Wisconsin, the firm has approximately 4,500 employees. In addition to maintaining three plants in its headquarters city, it has foundry units located in Marinette, Wisconsin, Tell City, Indiana, Effingham, Illinois, and Ironwood, Michigan.

After being controlled by ThyssenKrupp and being called ThyssenKrupp Waupaca, it was purchased by New York City-based private equity firm KPS Capital Partners and renamed Waupaca Foundry. In 2014, it was acquired by Hitachi Metals, becoming part of Hitachi Metals’ high-grade Functional Components Company.

On March 5, 2024, Monomoy Capital Partners announced that it had completed the acquisition of the company.