Charles R. Gordon

Flexuspine, Inc. manufactures devices for the replacement of the functional spinal unit. It offers functional spinal unit, a total spinal segment replacement to provide an alternative to lumbar fusion by re-establishing mobility to an affected segment of the lumbar spine. The company was founded by Charles R. Gordon, Vincent J. Jannetty, Erik J. Wagner and Corey T. Harbold in 2003 and is headquartered in Tyler, TX.

Siemens Water Technologies Corp. provides water and wastewater treatment systems. It offers services to municipal, industrial and institutional clients. The company was founded in 1978 and is located in Warrendale, PA.

Nuverra Environmental Solutions, Inc. engages in the development and ongoing production of oil and natural gas from shale formations. It operates through the following segments: Rocky Mountain, Northeast, Southern, and Corporate and Other. The Rocky Mountain segment includes the Bakken shale area. The Northeast segment is comprised of the Marcellus and Utica shale areas. The Southern segment covers the Haynesville shale area. The Corporate and Other segment includes certain corporate costs and certain other corporate assets. The company was founded on May 29, 2007 and is headquartered in Houston, TX.

Aegion Corp. engages in the provision of infrastructure protection, maintenance, and rehabilitation. It operates through the following segments: Infrastructure Solutions, Corrosion Protection and Energy Services. The Infrastructure Solutions segment focuses on the municipal water and wastewater pipeline sector. The Corrosion Protection segment captures the benefits of continued oil and natural gas pipeline infrastructure developments. It also protects, maintain, rehabilitate, assess, and monitor pipelines from the effects of corrosion. The Energy Services segment gives value proposition based safety and labor productivity programs, which allow cost-effective construction, maintenance, turnaround, and specialty services. The company was founded in 1971 and is headquartered in Chesterfield, MO.

Insituform Technologies LLC provides cured-in place pipe, other technologies, and services for the rehabilitation of water and wastewater pipeline systems. It offers solutions to remediate operational, health, regulatory, and environmental problems resulting from aging and defective pipelines. The company was founded in 1971 and is headquartered in Chesterfield, MO.

Natural Systems Utilities LLC engages in provision of water and energy utility services. It specializes in designing sustainable water ecologies for complete water supply, treatment, and reuse. The company was founded by Dominic Kulik in 2007 and is headquartered in Hillsborough, NJ.

Part of Siemens AG, Arrowhead Industrial Water, Inc. is a company that specializes in on-site industrial water treatment systems. The company is based in Milpitas, CA. Arrowhead Industrial Water was acquired by United States Filter Corp. from Goodrich Corp. on May 04, 1995 for $80 million.