> In 2005, at age 19,[9] Altman co-founded and became CEO of Loopt,[10] a location-based social networking mobile application. After raising more than $30M in venture capital, Loopt was shut down in 2012 after failing to get traction. It was acquired by the Green Dot Corporation for $43.4 million.[11][12]
From https://en.wikipedia.org/wiki/Sam_Altman:
> In 2005, at age 19,[9] Altman co-founded and became CEO of Loopt,[10] a location-based social networking mobile application. After raising more than $30M in venture capital, Loopt was shut down in 2012 after failing to get traction. It was acquired by the Green Dot Corporation for $43.4 million.[11][12]