It’s finally here. The Under30CEO March Madness Entrepreneurship Mashup has officially begun! Congratulations to all those who are dancing in 2013 and into the Sweet 16. We fielded over one hundred amazing applications from entrepreneurs all over the world. The young entrepreneurs out there are truly doing some amazing and diverse things. We heard from entrepreneurs leaving their day jobs to start their own development companies to inventors creating new game changing medical devices.

Under30CEO is looking to crown the entrepreneur that stands out as a business leader in their industry and it’s up to you to choose who will be crowned champion at the end of the tournament. Remember, voting is entirely based on social shares. You can click through to each entrepreneur’s page to learn more about them. We’ve covered everything from who they are, what their company does, and who they think will win this year’s NCAA tournament. You can vote by using the social shares on each matchup below or on the individual profile for each entrepreneur! Whoever has the most shares at the end of this week advances to the next round.

Voting for the Sweet 16 will close on Saturday, March 23 11;59 PM PST. Make sure to get your votes in and check back next Monday for the official announcement of the Elite 8!

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Thank you for voting! Subscribe to Under30CEO and check back next Monday to see if your favorite companies advance!