4. Niels Peter Louis-Hansen

•  Net Worth: $2.4 B                                                                      
•  Source of Wealth: medical devices
•  Citizen: Denmark
•  Age 66

Being the largest share-holder in Coloplast, Mr. Niels Peter occupies the fourth spot on this list of rich people. Coloplast was started by his father Aage Louis in 1957. It is a public company which went for Initial Public Offering in 1983. As of today, Mr. Niels owsn 21 percent stakes in it and this makes him a rich man in Denmark. Coloplast is an international company that develops, manufactures and markets medical devices and services related to ostomy, urology, continence, and wound care.