John Krupinski

Bull Moose Tube Co. manufactures mechanical and structural steel pipe and tube products. The firm makes tubing, hollow structural sections, mechanical tube, V50 pipe and sprinkler pipes which are used in container frame structures, handrails, rail cars and lighting, telescopes, and vehicle underbodies. The company was founded by Don Beattie in 1962 and is headquartered in Chesterfield, MO.

Esmark, Inc. operated as an holding company created to house the investment. It has focused on several key industries including oil and gas exploration, aviation, real estate, technology, and sports management. The company was founded on January 19, 1973 and was headquartered in Hinsdale, IL.

Part of Esmark, Inc., Esmark Steel Group LLC is a company that manufactures and markets steel. The company is based in Chicago Heights, IL. Roberto M. Alvarez has been the CEO of the company since 2021.

Esmark, Inc. is a diversified, privately-held family company with a portfolio of industrial companies with strong roots in the steel industry. Over the years, Esmark has diversified its interests and operations into a number of businesses engaged in the industrial and commodity sectors. Esmark (a former publicly traded company on NASDAQ: ESMK) has focused on several key industries including steel services, oil and gas exploration, aviation, real estate, business services, technology and sports management. Today, Esmark's two largest business segments are steel services and oil and gas production. The company is headquartered in Sewickley, PA.

Northern Steel Group, Inc. manufactures and markets steel. It operates through a number of steel service centers spread throughout Illinois, Missouri, and Ohio. The company is headquartered in Chicago Heights, IL.