Dick Costolo Steps Down as Twitter CEO; Jack Dorsey Named Interim CEO

Jack Dorsey, Twitter's co-founder and the current CEO of Square, will take over until a permanent replacement is named.

Dick Costolo is stepping down as the CEO of Twitter, the company announced Thursday.

Jack Dorsey, Twitter’s co-founder and the current CEO of Square, will take over until a permanent replacement is named.

This has been a turbulent year for C-level execs at Twitter, as CFO Anthony Noto is also heading up the company’s marketing department.

Costolo will still be a member of Twitter’s board of directors, but as of July 1, he will no longer hold the CEO title.

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