Contact Us

1100 McKinley Road
St Marys, OH 45885
P: 419-394-7840
F: 419-394-4776

Forty-Three Million Wheels...

A leader in the manufacture of
cast aluminum automotive wheels.

Our products can be found on some
of the most popular vehicles today.

Our clients include some of the largest
auto manufacturers in the world.

Mission Statement

Kosei St. Marys Corporation will strive to be the best aluminum wheel company in the world in terms of safety, quality, delivery, and customer satisfaction. All associates of Kosei St. Marys Corporation are involved in and support this objective.  


The Management will comply with requirements and continually improve the effectiveness of the Quality Management System. The manufacturing process will be based upon the latest proven technologies. All Kosei associates will be equipped with the best education and training. Each associate will control his or her own process and pass on only conforming parts to the next internal customer.


As a team we will strive to meet the emerging demands of the marketplace, with our customers’ needs at the heart of our efforts.

Environmental Policy

In the arena of environmental management, Kosei St. Marys (KSM) is committed to continuous improvement and will strive...

Corporate Social Responsibility

CSR is a commitment to contribute to sustainable economic development, working with employees, their families...