Company A filed for my GC case in EB-3 category and the labor and I-140 were approved. I then changed jobs and went to Company B. While working for Company B, I filed for I-485 based on the I-140 that I had from company A since company A was willing to give me a future job letter. Now another company C wants to hire me. Come December 29, I will be completing 180 days on my I-485. Will Company C be able to use AC21 portability to take over my I-485 application? I heard that along with the I-140 petition, people submit W2 and paystubs from the original petitionioning company for portability. Is this really required for AC21 portability?