Question is for H1B transfer ...

I have H1B from company A. Currently I am working for Company B and H1B transfer is under process from company A to B.

If I got the job offer, can I work for company C and transfer H1B from Company A to C ?

Usually, C can file for H-1 transfer while B’s transfer is in progress. However, there could be some timing issues, which C’s attorney can tell you looking at exact dates and scenario.