Twitter handle: @BillGates 

Date joined: Jan 19, 2010

Followers gained in 24 hours: 202,000

His biography reads: "cool things I'm learning through my foundation work and other interests." That’s exactly what the billionaire philanthropist and Microsoft co-founder delivers to his 9,318,000 followers. Gates obviously lacks the humor of other tech visionaries like Dick Costolo and Aaron Levie, but he can hold claim to scoring over 200,000 followers and landing on 6,400 Twitter lists in one day. Booyah!