Item 2. Properties

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Our corporate headquarters is located in New York, New York. This is also our largest sales office and one of our main research centers. As of December 31, 2018, our principal offices consisted of the following leased properties:

As of December 31, 2018, we also leased and occupied offices in the following locations (in descending order of square footage): San Francisco, California; Beijing, China; Frankfurt, Germany; Shanghai, China; Hong Kong, China; Paris, France; Tokyo, Japan; Ann Arbor, Michigan; Portland, Maine; Sydney, Australia; Toronto, Canada; Singapore; Seoul, Korea; Milan, Italy; Gaithersburg, Maryland; Cape Town, South Africa; Stockholm, Sweden; Sao Paolo, Brazil; Dubai, United Arab Emirates; Barcelona, Spain; and Taipei, Taiwan.

We believe that our properties are in good operating condition and adequately serve our current business operations. We also anticipate that suitable additional or alternative space, including those under lease options, will be available at commercially reasonable terms for future expansion.