Denio R. Bolzan

Pfingsten Partners LLC (Pfingsten Partners) is a private equity firm founded in 1989 by Thomas Steven Bagley. The firm is headquartered in Chicago, Illinois.

Aviation Power & Marine LLC distributes aero derivative gas turbine engine parts. Its products include combustors, transition pieces, combustion liners, buckets, blades, fuel nozzles, shroud blocks, pneumatic starters, lube oil and scavenge pumps, packing products, gaskets, nuts and bolts, control cards, engine cables and sensors. The firm’s services include technical consulting, field, borescope inspection and maintenance, fuel system up-gradation, asset management, component repair, engine and package inspection, and damage assessment services. The company was founded in 1990 and is headquartered in Boynton Beach, FL.

Ryerson, Inc. is a platinum equity company, which engages in the processing and distribution of metal products. The company process and distributes products in stainless steel, aluminum, carbon steel and alloy steels and a limited line of nickel and red metals in various shapes and forms which include coils, sheets, rounds, hexagons, square and flat bars, plates, structurals and tubing. It provides a broad range of processing and fabrication services and supply chain solutions, including just-in-time delivery and value-added components to original equipment manufacturers. The company's services include: just-in-time inventory programs, production of kits containing multiple products for ease of assembly by the customer, consignment arrangements, and production and technical assistance. Ryerson was founded in 1842 and is headquartered in Chicago, IL.

Part of ArcelorMittal SA, Washington Steel Corp. is an American company that manufactures sheet or strip steel. Washington Steel was acquired by Lukens, Inc. from US Enterprise Corp on April 27, 1992 for $280 million.

Powervar, Inc. manufactures and distributes power conditioning products. The firm's primary products include transformer-based power conditioners and uninterruptible power supplies (UPS). It also offers engineering, application, onsite, and depot repair support services. The company was founded in 1986 and is headquartered in Waukegan, IL.

Part of Ryerson Holding Corp., Washington Specialty Metals Corp is a metals service center specializing in value-added stainless steel. The company is based in IL. Washington Specialty Metals was acquired by Ryerson, Inc. from Bethlehem Steel Corp. on February 01, 1999 for $70 million.