Ashton Kutcher: Actor, tech investor and producer Kutcher created a venture fund, A-Grade Investments, that has invested in multiple start-up tech companies, including Spotify, Airbnb, Foursquare, Fab, Uber, Dwolla and Path. Kutcher is also co-founder of Katalyst, a media company creating original content for digital media, television and film. Kutcher was the first Twitter user to obtain 1 million followers, beating out CNN in a highly publicized race.