Advanced Drainage Systems, Inc. engages in the manufacture of thermoplastic corrugated pipe, which provides a suite of water management products and drainage solutions for use in the construction and infrastructure marketplace. It operates through the following segments: Pipe, Infiltrator, International, and Allied Products & Other. The Pipe segment manufactures and markets thermoplastic corrugated pipe throughout the United States. The Infiltrator segment provides plastic leachfield chambers and systems, septic tanks and accessories, primarily for use in residential applications. The International segment manufactures and markets pipe and allied products in regions outside of the United States. The Allied Products & Other segment manufactures and markets products throughout the United States. Products include StormTech, Nyloplast, ARC Septic Chambers, Inserta Tee, water quality filters and structures, Fittings, and FleXstorm. The company was founded in 1966 and is headquartered in Hilliard, OH.

Pre-Con Products provides engineering construction services of utility systems, pump stations, force protection and industrial buildings. The company was founded by Don Domingo Zarraonandi in 1963 and is headquartered in Simi Valley, CA.

StormwateRx LLC is a private company headquartered in Portland, OR, that designs, manufactures, installs and maintains storm water treatment systems.

Storm Technology, Inc. offers custom configuration of personal computers, portables and servers. The company was founded in January 1990 and is headquartered in Mountain View, CA.

Oldcastle Infrastructure, Inc. engages in manufacture and distribution of utility products and construction accessories. It offers its products to the telecommunications, energy, transportation, building structures, and water markets. Its product lines include Carson, Onelift Pump Station, and Stormcapture. The company was founded on October 14, 1994 and is headquartered in Atlanta, GA.

LRM Industries International specializes in commercializing thermoplastic flow-forming technology. Its TPF is a process technology for producing large, feature-rich, long-fiber reinforced thermoplastic composite parts in one fully automated operation. The company enables innovative applications and designs in the use of thermoplastics or composites to produce very large unitary structures where, to-date, it has been viewed as cost-prohibitive or lacking in strength and structural integrity. LRM Industries was incorporated in Rockledge, Florida.

Optirtc, Inc. provides software solutions to optimize the function of civil and environmental infrastructure. Its solutions include combined sewer overflow reduction, rainwater harvesting, hydromodification, water quality improvement, stormwater credit markets, green infrastructure, conventional stormwater infrastructure, clean water act compliance, water quality, water level, performance and research. The company was founded by Marcus Quigley, Alex Bedig and Owen Cadwalade in December 2014 and is headquartered in Boston, MA.

KOLONGLOBAL Corp. engages in the provision of construction and trading services. It operates through the following business divisions: Construction, Trading, Automobile, Resting Facilities, and Others. The Construction division provides civil engineering, housing, environment, plant, oversea construction, and rental services. The Trading division offers construction materials, heavy chemicals, and steel products. The Automobile division provides car services. The Resting Facilities deals with high-way rest areas. The Others division offers sports complex and sports consulting services. The company was founded on December 28, 1960 and is headquartered in Gwacheon, South Korea.

Korea Institute of Civil Engineering and Building Technology contributes to the development of the Korean construction industry.

Lane Enterprises, Inc. is an American private company that manufactures and wholesales metal and HDPE plastic drainage products.

Keshun Waterproof Technologies Co., Ltd. engages in the manufacture, marketing, research and development of waterproof coating, bitumen membrane, adhesives and all other chemical products for building and infrastructure. The company was founded on October 10, 1996 and is headquartered in Foshan, China.

2NDNATURE’s mission is to deliver actionable science to support sustainable water resource stewardship, healthy ecosystems, and community resilience. Our stormwater management and compliance platform brings transparency and accountability to urban land management. Our geospatial solution empowers local and state government staff to efficiently comply with Clean Water Act requirements while enabling an ongoing capacity to measure program performance.

Oldcastle Precast Group provides cement, ready-mix concrete and aggregates. It produces utility vaults, electrical vaults for the utility and telecommunication markets. The company is headquartered in Auburn, WA.

Low & Bonar, Inc., part of Freudenberg & Co. KG, is an American company located in Candler, NC. The firm manufactures and markets textiles.

Huanyi Yuhong Ecological Technology (Changchun) Co., Ltd., established on 2021-02-24, Business scope includes new material technology promotion services;New material technology research and development;Manufacture of new building materials(Free of Hazardous Chemicals);architecture,Technology research and development of environmental protection related materials and equipment,Sales and Installation Operation;Technical research and development of sponge city related materials and equipment,Sales and Installation Operation;Construction waste and agricultural waste recycling related equipment,material technology research and development,Sales and Installation Operation(Items subject to approval by law,Business activities can only be carried out after approval by relevant departments).

Aquality Trading & Consulting Ltd. is a private company headquartered in London, UK. The firm supplies rainwater harvesting and greywater recycling systems.

Century Engineering, Inc. provides consulting engineering services. The firm offers civil, mechanical, electrical, structural, geotechnical, and environmental engineering services. It offers professional services in civil, survey, geotechnical, landscape architecture, mechanical, electrical, plumbing, structural, environmental and transportation engineering throughout the Mid-Atlantic region. The company was founded in 1953 and is headquartered in Hunt Valley, MD.