Date: 4/28/2016

Contact: Alexis Fermanis, SIOR Director of Communications |



May 4, 2016—WASHINGTON, DC—

SIOR is pleased to announce its Top 100 Office Transactions List of 2015, which it unveiled recently at its Spring World Conference in San Diego. The Top 100 list is a compilation of the largest sales and lease transactions, ranked by square feet, completed by SIOR members.

The Top 100 list was derived from among nearly 1000 transactions SIOR members reported during the calendar year 2015, at an aggregate value of more than $5.1 billion. Among the Top 100, transactions were completed in 80 distinct markets throughout North American, Europe, and Asia, demonstrating the tremendous geographic coverage and diversity of SIOR as an organization. 

The three largest transactions all exceeded 750,000 square feet: Andreas Krone, SIOR, NAI Apollo Real Estate, arranged the sale of a 1,915,000-square-foot office property  in Berlin, Germany; Donald Reimann, SIOR, of Colliers International, arranged the lease of a 1,016,953-square-foot office property in Santa Clara, CA, and Mike Moran, SIOR, Cushman & Wakefield, arranged the sale of an 800,000-square-foot office property in Foster City, CA. 

“SIOR is having a tremendous year,” said Allen Gump, SIOR’s Global President. “We are continuing to celebrate our 75th anniversary, we recently hosted our Spring World Conference in San Diego, and now we are honoring the wonderful achievement of our members, who continue to distinguish themselves as best-in-class brokers and advisors around the globe. Our Top 100 transactions list is further evidence that SIOR is a vibrant organization whose designation reflects the quality of service our members provide.”

The next three largest transactions among the Top 100 exceeded 500,000 square feet: Taber Thill, SIOR, Dan Doherty, SIOR, and Ryan Martin, SIOR, all of Colliers International, arranged the sale of a 610,140-square-foot property in Las Vegas; Joe Thanhauser, SIOR, of Byrnam Wood, arranged the lease of a 604,000-square-foot property in New York City; and Tom Deboer, SIOR, of Colliers International, arranged the sale of a 552,150-square-foot property.

For a complete list of the top 100, click here.

Headquartered in Washington, DC, the SOCIETY OF INDUSTRIAL AND OFFICE REALTORS (SIOR, is a global professional organization that certifies commercial real estate service providers with the exclusive SIOR designation. Individuals who earn their SIOR designation adhere to the highest levels of accountability and ethical standards. Only the industry’s top professionals qualify for the SIOR designation. Today, there are nearly 3,100 SIOR members in 630 cities in 34 countries.

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