L2 EAD to H1B transfer Scenario -- Advise needed !!

[hodor]

Hi,

I have a scenario for which i would need your advice.

I am working on an L2 EAD with a company X since June 2015(My first job in US).
I applied for h1b on March 2015 and got approved through a consultancy Y.


My question is

I would like to transfer my h1b from Y to X . is it possible ? if yes how should i go about it ?
If company Y comes to know about this transfer , will it be possible for them to revoke my h1b ?

Thanks for reading the my query

Regards,
Sanjay.