David Matthews

Ernst & Young LLP engages in the provision of accounting, assurance, tax, transaction, and advisory services. It specializes in the actuarial, analytics and big data, cyber security, accounting compliance and reporting, center for board matters, international financial reporting standards, country tax advisory, global trade, tax accounting, and climate change and sustainability. The company was founded in 1989 and is headquartered in New York, NY.

Tetra Tech UK Holdings Ltd. is a holding company, which engages in the provision of environmental engineering, technical, and consulting services. The company was founded on August 17, 2006 and is headquartered in Reading, the United Kingdom.

Part of Tetra Tech, Inc., Tetra Tech Canada, Inc. is a Canadian company that provides consulting engineering, program management, construction management and technical services. The company is based in Vancouver, Canada.

AllianceBernstein LP (AB) is a SEC-registered investment advisor and mutual fund manager headquartered in Nashville, Tennessee. Founded in 2000, the firm is owned by Equitable Financial Life Insurance Co., ultimately held by Equitable Holdings, Inc. (NYSE: EQH). AB provides investment advice to investment companies, pension and profit-sharing plans, banks and thrift institutions, trusts, estates, government agencies, charitable organizations, individuals, corporations and other business entities.

Part of Deutsche Bank AG, Morgan Grenfell & Co. Ltd. is a British company that manages private investments. The company is based in London, UK.

INDUS Enterprise Solutions, Inc. provides information technology support services. Its services include software development, database design, system administration and maintenance, systems integration, software and network engineering, web services-enabled solutions, and information systems security. The company was founded by Aaron B. Floyd in 1986 and is headquartered in Vienna, VA

GeoTrans, Inc. provides environmental engineering and remediation services. It serves the automotive, aerospace, manufacturing, energy, petrochemical, transportation, and telecommunication industries. The company was founded in 1979 and is located in Sterling, VA.

Tetra Tech Tesoro, Inc. provides construction services. It also build schools, hospitals, and clinics for selected commercial and private clients. The company was founded on June 4, 1997 and is headquartered in Virginia Beach, VA.

Tetra Tech India Ltd. engages in the provision of consulting, engineering, program management, and construction management services. The company was founded on April 4, 2017 and is headquartered in New Delhi, India.

Part of Tetra Tech, Inc., Coffey International Development Ltd. is a British company that provides development consultancy services. The company is based in Reading, UK. Coffey International Development was acquired by Tetra Tech Coffey Pty Ltd., part of Tetra Tech, Inc. from 2016-03-09 on 2006-03-06 for $6.13 million.

Part of Tetra Tech, Inc., Coffey UK Ltd. is an investment holding company. The company is based in Reading, UK. Coffey was founded in 2006.

Tetra Tech NUS, Inc. provides environmental, engineering, remediation and information technology consulting services. The company is headquartered in Pittsburgh. PA.

ARD, Inc. operates as an international development services consulting firm. The firm provides water resources and infrastructure, agriculture and economic growth, environment and natural resources, land tenure and property rights, democracy, governance and knowledge management services to international development customers. The company was founded by George C. Burrill and James R. Nolfi in 1977 and is headquartered in Burlington, VT.