H1B transfer while H1B application is pending with current employer

[h1transfer888]

Hello experts,

I have a pending H1B(for 3 year extension) application with my current employer and I wanted to change to a different employer as he is not paying me well and not responding well.

I do have a steady job with a big client and I want to change to a different employer while I have the job and I don't want to wait until the current application approved.

Is it possible to transfer to the new employer while the current application is pending with current employer??

Thanks very much in advance.