Apple becomes the world's only second company to hit $2 trillion market cap.

Apple on Wednesday became the first publicly traded US company and world's only second company to hit $2 trillion in market cap. However, Apple, which hit $1-trillion mark two years ago, briefly hit $2-trillion mark after its shares traded at around $470 today. Oil major Saudi Aramco was the world's first publicly listed company to hit $2 trillion market cap.