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Today, theWashington Post came out with its Post 200 list, a ranking of the largest companies and organizations headquartered in the region. Not surprisingly quite a few real estate groups make the list. Here they are, organized from least revenue to most:

First Potomac Realty Trust:  $124.3 million 
Washington Real Estate Investment Trust:  $282.3 million 
Kettler:  $497.0 million 
Federal Realty Investment Trust:  $520.5 million
Corporate Office Properties Trust:  $588.0 million Long & Foster: $767.0 million
Donohoe Cos.: $790.5 million
AvalonBay Communities: $854.2 million
Hitt Contracting: $913.0 million
B.F. Saul Co.: $1.4 billion
NVR Inc.: $3.7 billion
Clark Enterprises: $4.8 billion