Atento S.A. (NYSE:ATTO), the Latin American call-center giant, is exploring options including a sale, according to people with knowledge of the matter. Sao Paulo-based Atento is working with Goldman Sachs Group Inc. on alternatives such as soliciting interest from potential buyers including private equity firms, said the people, who requested anonymity discussing private talks. It isn't guaranteed a transaction will result.

Representatives for Atento and HPS Investment Partners, its largest shareholder, declined to comment. A Goldman spokesperson didn't immediately respond to a request for comment.