H1B transfer & I140

[humblehonest]

Hi,

I got a new job offer with desi contractor working for a direct client. My I140 has been approved, I485 not yet filed (so no EAD). I passed my 6 year H1B in 2009 and I have been extending my H1B based on my I140 approval. The contractor said he will do H1B transfer for me and after working for him for one year, I can again transfer my H1B to the client and work for the client. My question is, can I do multiple transfers with the current I140 or do I need to file new I140 for every H1B transfer (I am on 11th year H1B).

Your answer is appreciated.

thanks..