Setting out to lease and sell properties in the huge expanse of real estate known as Southern California is a daunting task. From the industrial buildings of the Inland Empire, to the high-rises in the Los Angeles CBD, the region presents a multitasking challenge to any broker that wants to work this territory. Recently, the editors of Real Estate Forum collected deal information from leasing and investment brokers across the metro area who have met that challenge. We've come up with a roster of the most prolific brokers in the market, featuring the top 16 individual agents or teams who handle landlord and tenant representation, followed by the top 15 most active investment sales brokers or teams, presented in alphabetical order.

METHODOLOGY: Deal information is for commissionable transactions closed in the Southern California region between October 1, 2011 and September 30, 2012, and all data shown has been supplied and verified by the companies themselves. Leasing brokers were given scores based on the total number of leasing transactions they closed, the total square footage of all leasing transactions and their total value. The final score was based on the average of the three fields. The investment sales brokers were scored on total number of sales transactions closed and total sales volume, with the final score based on the average of those two figures.

To see who made the list, please visit the December issue of Real Estate Forum online.