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II-VI Incorporated develops, manufactures, and markets engineered materials, optoelectronic components, and devices worldwide. It operates through two segments, Compound Semiconductors and Photonic Solutions. The Compound Semiconductors segment provides optical and electro-optical components and materials used in high-power CO2 lasers, fiber-lasers, and direct diode lasers for materials processing applications; infrared optical components and high-precision optical assemblies for aerospace and defense, medical, and commercial laser imaging applications; semiconductor lasers and detectors for optical interconnects and sensing applications; engineered materials for thermoelectric, ceramics, and silicon carbide various applications; and compound semiconductor epitaxial wafers for applications in optical and wireless communication. The Photonic Solutions segment manufactures transceivers for data centers and telecom optical networks; pump lasers, optical amplifiers, wavelength selective switches, and advanced components for telecom networks; and crystal materials, optics, lasers, and optoelectronic modules in a range of applications, including optical communications, life sciences, and consumer electronics markets. The company serves original equipment manufacturers, laser end users, system integrators of high-power lasers, U.S. government prime contractors, and various U.S. government agencies, as well as manufacturers of equipment and devices for industrial, optical communications, consumer electronics, and security and monitoring applications. II-VI Incorporated was incorporated in 1971 and is headquartered in Saxonburg, Pennsylvania.

MSA Safety Incorporated develops, manufactures, and supplies safety products and technology solutions that protect people and facility infrastructures in the fire service, energy, utility, construction, and industrial manufacturing applications, as well as heating, ventilation, air conditioning, and refrigeration industries worldwide. The company's core product offerings include fixed gas and flame detection systems, such as gas detection monitoring systems, and flame detectors and open-path infrared gas detectors; breathing apparatus products, including self-contained breathing apparatus; hand-held portable gas detection instruments to detect the presence or absence of various gases in the air; industrial head protection products; firefighter helmets and protective apparel; and fall protection equipment, such as confined space equipment, harnesses, lanyards, and self-retracting lifelines, as well as engineered systems. In addition, the company offers air-purifying respirators, eye and face protection products, ballistic helmets, and gas masks. It serves distributors and end-users through indirect and direct sales channels. The company offers its products under the V-Gard, Cairns, and Gallet brand names. MSA Safety Incorporated was founded in 1914 and is based in Cranberry Township, Pennsylvania.

SiteOne Landscape Supply, Inc., together with its subsidiaries, engages in the wholesale distribution of landscape supplies in the United States and Canada. The company provides irrigation products, including controllers, valves, sprinkler heads, irrigation pipes, micro irrigation, and drip products; fertilizer, grass seed, and ice melt products; control products, such as herbicides, fungicides, rodenticides, and other pesticides; landscape accessories that include mulches, soil amendments, drainage pipes, tools, and sods; nursery goods, which consist of deciduous and evergreen shrubs, ornamental, shade, evergreen trees, field grown and container-grown nursery stock, roses, perennials, annuals, bulbs, and plant species and cultivars; hardscapes, such as pavers, natural stones, blocks, and other durable materials; and outdoor lighting products that include lighting fixtures, LED lamps, wires, transformers, and accessories. It also offers consultative services consisting of assistance with irrigation project take-offs, commercial project planning, generation of sales leads, business operations, and product support services, as well as a series of technical and business management seminars; and distributes branded products of third parties. The company offers its products under the LESCO, SiteOne Green Tech, and Pro-Trade brand names. It markets its products primarily to residential and commercial landscape professionals who specializes in the design, installation, and maintenance of lawns, gardens, golf courses, and other outdoor spaces through branch network and direct distribution. SiteOne Landscape Supply, Inc. was incorporated in 2013 and is headquartered in Roswell, Georgia.

Tetra Tech, Inc. provides consulting and engineering services in the United States and internationally. The company operates through two segments, Government Services Group (GSG) and Commercial/International Services Group (CIG). The GSG segment offers early data collection and monitoring, data analysis and information management, science and engineering applied research, engineering design, project management, and operations and maintenance services; and climate change and energy management consulting, as well as greenhouse gas inventory assessment, certification, reduction, and management services. This segment serves federal, state, and local governments; and development agencies in water resources analysis and water management, environmental monitoring, data analytics, government consulting, waste management, and a range of civil infrastructure master planning and engineering design markets. The CIG segment provides early data collection and monitoring, data analysis and information management, feasibility studies and assessments, science and engineering applied research, engineering design, project management, and operations and maintenance services; and environmental remediation and reconstruction services, and industrial water treatment services. This segment serves natural resources, energy, and utilities markets, as well as sustainable infrastructure master planning and engineering design for facilities, transportation, and local development projects. Tetra Tech, Inc. was founded in 1966 and is headquartered in Pasadena, California.