Twitter is on the hunt for its next CEO as the company’s co-founder, Jack Dorsey, fills in the position in the meantime.

Since Dick Costolo stepped down from his position as CEO in June, the company has been working on major changes, both in how Twitter runs and who is going to run it.

Dorsey stepped down from the position in 2008 and has since co-founded a mobile payment company called Square. There was speculation that Dorsey would be leaving the company to go back to Twitter, but he has since denied this.

According to Business Insider,

“Adam Bain is under more serious consideration than anyone on the very short list of outsiders, according to a person familiar with the matter. Bain is the ‘number one candidate that the board is focused on right now,’ this person said. ‘It’s Bain’s to accept or reject.’”

Bain has been with the company since September 2010 where he has worked as the President of Global Revenue handling advertisements for the website.

Twitter has taken on the executive search and leadership consulting firm Spencer Stuart, and now Social Media Blazer came up with a list of 13 potential candidates.

In the article it said, “Rumors continue to swirl, so we’ve put together a listing of viable appointees, in addition to some wild rumor for good measure.”

The list goes on to include people like Jeff Weiner, Padmasree Warrior and Snoop Dogg. This list has since been narrowed down into more qualified candidates.

Ross Levinsohn, who is the Chairman of Scout.com and a brief time was the CEO of Yahoo, is said to have potential because of his work in social media.

A few months back Levinsohn tried to get a conversation about going Yahoo buying Twitter. Yahoo acquired Tumblr for $1.1 billion in May of 2013, so acquiring another social media platform wouldn’t be out of their range.

Levinsohn said on CNBC,

“Honestly I think Twitter should go buy Yahoo. If you separated Yahoo into the two business that it really is – a tracking company and an operating company. If you put Yahoo and Twitter together it would be the most powerful force in the media business.”

During this time, analysts were unsure if Costolo would stay for much longer in his position, and they were correct.

According to The Wall Street Journal, “[SunTrust anaylist Robert Peck] floated Levinsohn’s name as well as Google executive Neal Mohan as potential successors.”

Bradley Horowitz is another potential candidate with a lot of experience with social media. He is the Vice President of Product for Google’s social features including Google+.

This and his involvement with other projects, such as Gmail, Gtalk, Google Docs, Google voice and Google Calendar, give him an upper hand, seeing as his experience has been directly correlated with social media.

Mike McCue was a board member of Twitter for two years and is the CEO of Flipboard which is an information platform that consists of news, videos and photos made accessible for everyone, everywhere.

In May rumors were flying around about Flipboard acquiring Twitter.

McCue couldn’t confirm or deny the rumors, but he did tell CNBC,

“We have a very close partnership with Twitter. We have promoted tweets on Flipboard, so you are going to see us do more and more with Twitter over time.”

Some of the names floating around stand a small chance at rising to the top of Twitter, while others have been on the mind of analysts for a long time. There is no set date for the choosing of the CEO, but whoever it is will have some big shoes to fill.