In 1990, Marshall Holding Company was formed in order to consolidate the ownership of both ASCO and MSI. Ownership of both companies remains in the Marshall family today.

Aluminum Supply Company

Aluminum Supply Company, Inc. (ASCO), founded by Robert Marshall in 1948. ASCO's original concept was to create a one-stop wholesale depot for aluminum building products and accessories. Detroit did not have a resource like this at the time, so there was a clear opportunity for success. ASCO quickly became known as the Metro Detroit area's premier supplier of architectural building products.

Marshall Sales Inc.

The overwhelming success of ASCO offered the Marshall family an opportunity to expand, and in 1956, Marshall Sales was founded. For nearly six decades, the goal of MSI has been to market and distribute industrial fasteners for various trades. Today MSI remains a major supplier of fasteners to automotive and construction industries.


Formerly West Michigan Nut & Bolt, MSI West was created to help meet the demand of fasteners in Michigan. The addition of MSI's Kalamazoo branch has increased Marshall Sales' ability to distribute fasteners.