I would imagine the cuts occurred when none of the primary actors/actresses were on screen and when the camera was progressing through the building and the crowd outside with the crowd.

I was impressed with the camera work for that crowd scene outside of the E-Corp building; I wonder when that was filmed because that area of Manhattan is pretty busy, even on the weekends if I'm not mistaken. I wonder how much time the crew was allowed to shoot that fairly chaotic scene.