This expression means that the people (or whatever) in question are in some way responsible for the success of the company (or whatever). Success is used as a noun, and the subject(s) made the object into a success.
Your examples are using it correctly.
This is not make as in construct/create - it is not I make a child a toy, in which a toy is being made for a child. It is more like I make a child a scholar, in that you have caused the child to become a scholar. In that, it is not precisely just the sense of make related to cause. It is more like make into, just the into is (sometimes) missing. It thus has elements of both cause and create meanings.