John T. Byrnes

Manitou America Holding, Inc. manufactures equipment for construction, agriculture, industry and beyond. It has manufacturing units in South Dakota, Texas and Illinois. The company was founded in 1859 and is headquartered in West Bend, WI.

The Oilgear Co. designs, manufactures and supplies hydraulic equipment and fluid power systems. Its products include pumps, valves, electronics, cylinders and accumulators. The firm offers field commissioning and trouble shooting, system simulation, CFD and FEA, root cause analysis, testing and product training services. The company was founded in 1921 and is headquartered in Traverse City, MI.

Marshall & Ilsley Corp. had provided comprehensive financial products and services and unparalleled customer services to personal, business, corporate and institutional customers. The company was founded in 1847 and was headquartered in Milwaukee, WI.

GAMFG Precision LLC manufactures and supplies precision components. The firm's products include steel and aluminum components, fixtures, machine tools, castings and forgings. It provides products for engines, hydraulics, brake and fuel systems, air systems and transmissions. The company was founded on August 3, 1951 and is headquartered in Franklin, WI

TeraMedica, Inc. operates as a medical informatics company. It offers digital x-ray systems, to the Synapse brand of PACS, RIS and cardiovascular products, to advanced women’s health imaging systems. The company was founded in 2001 and is headquartered in Milwaukee, WI.

LyondellBasell Composites LLC develops, formulates and manufactures thermoset compounds and parts. It offers automotive body panels, electrical parts, business equipment cabinets and personal watercraft services. The company serves the automotive, appliance, electrical, construction and aerospace industries. Premix was founded in 1959 and is headquartered in North Kingsville, OH.

HyperEdge Corp. develops and supplies network access products. The company was founded by Brad Ketch, Donald R. Mulder, and Dwight Swartwood in 1992 and is headquartered in Batavia, IL.

Mason Wells Inc (Private Equity)(Mason Wells) is a private equity subsidiary of Marshall & Ilsley Corporation founded in 1998 by John Thomas Byrnes. The firm is headquartered in the Milwaukee, Wisconsin.