Green Dot Corporation (NYSE:GDOT) is in talks to buy UniRush, LLC, according to people familiar with the matter. Green Dot has entered into exclusive negotiations with UniRush after an auction for the company, said the people, who asked not to be identified because the process is private. A deal hasn't been finalized and the talks could fall apart, they said.

UniRush, which is backed by The Carlyle Group LP (NasdaqGS:CG), is worth about $150 million, one of the people said. Representatives for Green Dot, Carlyle and William Blair declined to comment.