Some sites like to make this sound as though Zim left in a hurry, perhaps unexpectedly, and it’s claimed they broke their lease. No source is ever provided for this suggestion, though, and other accounts say not. ...their rental lease contract with the Port Authority expired on September 1. Still, Zim Israel had kept a small office behind in the World Trade Center, an office which consisted of their computer shipping tracking equipment. All of the computers were destroyed in the 9/11 attack and Zim's operations were actually down for a short period.
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And the “sudden” move? Not so sudden. The President of the company said “
initial planning for this move began as part of a Go Forward Plan initiated almost two years ago”. It had been announced the previous April that they were going to relocate to Norfolk, Virginia, in April 2001.