DENVER-Thom Williams, one of Denver’s most prominent African-American businessmen, has secured a 51% stake in Denver-based Mile High Properties, possibly making it the largest minority-owned property management/brokerage firm in the nation.

“It certainly is the largest property and full-service minority-owned company in the region,” says real estate veteran George Thorn, principal of Mile High Cos., which owns the remaining 49% of Mile High Properties.

Williams, a lawyer by training, joined Mile High Properties in May. “Anecdotally, we’ve researched it and asked around and could find no larger minority-owned company,” he says. Before joining Mile High Properties, Williams headed the Denver operation for Teachers Insurance and Annuity Association Colorado Retirement Fund. He also is chairman of the Denver Urban Renewal Authority.

Mile High Properties manages 4 million sf of space in mostly class A office high-rises. It’s ranked third in size overall in Denver, with the other big competitors being national firms, such as Trammell Crow and Jones Lang Wooten. Thorn told that Mile High Properties is probably the region’s leader in terms of managing office buildings.

Williams says the company primarily caters to Fortune 1000 companies, including TIAA-CREF, the pension fund where he worked for more than two decades. In addition to leasing and property management, Mile High offers a wide array of services, such as accounting, engineering, consulting on expansions or downsizing, and outfitting buildings with the latest technological features.

“Though we have our minority ownership aspect, it is not our primary stock and trade,” Williams says. The minority-owned status does not impact on Mile High’s scope or ability to work on large deals. “We have demonstrated that we can successfully handle the largest and most challenging situations,” says Williams.

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