Blackstone Group LP and Carlyle Group LP, the two biggest private equity firms, have teamed up to consider a buyout of NCR Corp., according to two people with knowledge of the process.

The process, being run by JPMorgan Chase & Co., is in early stages and a pricing gap exists between the company and possible buyers, the people said. NCR’s bankers have sought at least $36 a share for the Duluth, Georgia-based ATM maker, said one of the people, who asked not to be named because details of the process are private.

Kevin Ruane, a spokesman for NCR, said the firm doesn’t comment on rumor or speculation. Christine Anderson, a Blackstone spokeswoman, declined to comment, as did Randy Whitestone, a spokesman for Carlyle.

Reuters earlier reported that Blackstone and Carlyle are teaming to consider buying the company. The news service also said buyout firms Apollo Global Management LLC and Thoma Bravo are considering bids.

NCR rose 11 percent to $34.73 at the close of trading in New York, extending gains this year to 19 percent.