I changed company from A to B after my Labor is approved. Company A is good enough to continue the GC process, Filed I-140 and 485 concurrently in December 2002. I-140 is approved in November 2003 after 2 RFE's. My question is am I eligible to file AC21 and get my GC process taken over by company B. Another point is company A is a small company and have only about 10 employees. Company B is a big corporate office. I did not change the location of the job, I am still working at the same location and same job description holds good as per my GC labor. Please let me know if I can ask company B to file AC21 after 6 months of I-140 approval. Thanks in advance.