The most richest sri lankan in the world?

Since Sri Lankans are present in many countries, the definition of ''Sri Lankan'' itself is up for debate. If you mean a Sri Lankan in an official sense, its probably Harry Jayawardena. If you mean a person with Sri Lankan roots/origin, it probably is not. Its not as simple as long ago during the times of CH de Soysa or Sir Ernest de Silva when the richest Sri Lankan probably was situated in Sri Lanka.