If you leave the company, you would keep your priority date - your place in line - but you would need to start the green card process from scratch and your abil

If you leave the company, you would keep your priority date - your place in line - but you would need to start the green card process from scratch and your ability to continue working in H-1B status would depend on your current employer not cancelling the approved I-140 petition (which most employers don't do).