Update: It looks like a little jumping of the gun on my part as a tweet from Michael Bay indicates there is still a week to go.

Thanks #hongkong Now on to #China #Transformers4 #tf4 #transformers #michaelbay

Chances are the main cast, or at least Nicola, has wrapped but the crew still has various locations to visit to complete the look that much of the film takes place in various locations in China.
---------------------------------A tweet by Transformers: Age of Extinction's Nicola Peltz indicates that after five months of filming, principle photography on the movie is finished.

That's a wrap on Transformers 4! An amazing journey!!! #transformers4 http://instagram.com/p/f_iFW6NVis/