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THR Management LP, [1] commonly referred to as Tishman, is an American corporation founded in 1898 that owns and develops real estate. The company is best known for being the contractor that built the original World Trade Center in New York City. Tishman Construction Corporation, the construction division of the company, was sold to AECOM in 2010.
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AECOM (/ eɪ. iː ˈ k ɒ m /, ay-ee-KOM; formerly AECOM Technology Corporation; stylised AΞCOM) is an American multinational infrastructure consulting firm headquartered in Dallas, Texas. The company's official name from 1990–2015 was AECOM Technology Corporation, and is now AECOM. [ 2 ]
Tishman Speyer is an American multinational corporation based at 45 Rockefeller Plaza in Midtown Manhattan. The conglomerate invests in high-profile real estate properties, has developed multiple buildings around the world, and has owned famous buildings and land plots, including the Chrysler Building .
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Speyer was born to a Jewish family, the son of Lynn (née Tishman) and Jerry Speyer. [4] His great-grandfather, Julius Tishman, founded Tishman Realty and Construction; and his father Jerry Speyer and his maternal grandfather, Robert Tishman, founded the real estate development firm Tishman Speyer. [5] His parents divorced in 1987. [6]
Robert Valentine Tishman (April 7, 1916 – October 11, 2010) was an American real estate developer who was head of the family-owned firm Tishman Realty & Construction until it was disestablished in 1977, and was one of the two founding partners of Tishman Speyer, which was formed in 1978 and became one of the largest owners and builders of office buildings in the United States.
Amentum traces its AECOM roots back to several well-known government contracting firms that now form the basis of its current work. These firms came to be a part of the company by way of AECOM's acquisition of URS Corporation and include EG&G , Washington Group International , Westinghouse Government Services , and Lear Siegler .