The Office Tower Has a New Job to Do
             
            
              daryn
            
             ·             
            
              
              
              
              
                
                1 minute read      
              
                      
          
        
        In 2015, private equity giant Blackstone Inc. purchased the Willis (née Sears) Tower and began a half-billion-dollar renovation that would radically change the role the former tallest building in the world would play in downtown Chicago.
 
      
      
    
      