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The plaintiff in the latest case is Columbia REIT-650 California, LLC, the landlord of the 650 California Street office tower in San Francisco. Exhibit A in the lawsuit is a lease between Columbia REIT and CrossInstall, a mobile ad company purchased by Twitter in May 2020. All of CrossInstall’s 70 employees joined Twitter at the time.

The lease was made in September 2017 for a period of seven years and covered 15,500 square feet, the entire 30th floor of the building. The annual rent started at $1.29 million, and the lease had automatic increases throughout the seven-year term.