Consider the enterprise that creates and owns its own insurance company; i.e. the insurer is “captive” to the policyholder.
If it insures just one type of business – let’s say food service companies – it is said to be a homogeneous captive. A captive can also insure a group of diverse companies; this is called a heterogeneous captive.
So, can you create a pool that functions better than the one you are already in? That’s a good question.