H1 B - Transfer

[MuraliKanna]

Hi,

My question is regarding H1 B transfer

 

My current employer applied for H1B extension under premium processing and the petition is still under process.

 

For some reason I would like to transfer my H1 B to another employer, is it possible?
If Yes, what are the risks in it?

 

I understand that If I transfer then my new employer has to re-initiate the extension process but what are the risks in it? My Visa extension will be successful?

 

Please advise. Thanks in advance.