There are many under-the-radar stocks quietly building empires that stock investors should know about. These are the types of relatively unknown firms that create wealth for investors. However, as a result of being unknown, most investors have no idea of their virtues.A few of the names discussed below are somewhat well-known but none are household names in my mind. Each of these firms offers investors a lot to like and by getting in early the same investors can profit handsomely.It’s worth noting that the ...