H1B transfer, extension using I140 from a different company

[kalpsen]

Hey,


I'm with Company A on H1 for 6 years, and that is expiring is the next few months.
I filed GC with Company B, and have got my I140 approved.

Now, the question is,
1. Can I only join Company B (with whom i have GC filed) with H1 transfer, and get it extended for another 3 more years ?
or
2. Can I also join a new Company C directly, and use my I140 from company B, to get my H1B extended for 3 years ?


Please advise.


Thank You
Raj