Financial technology giant NCR’s plans for a new headquarters complex in Midtown Atlanta could be growing.

The Fortune 500 maker of software, ATMs and self-service kiosks is working on a potential second phase of the project even as the first rises, people familiar with the matter told The Atlanta Journal-Constitution.

NCR and its developer, Cousins Properties, are considering a second office building next to a tower of about 20 stories already under construction at Eighth and Spring streets near Technology Square.

Details about the size of the potential second phase were not immediately known.

NCR officials declined to comment Wednesday.

A message left with a spokeswoman for Cousins Properties was not immediately returned.

The L-shaped design of the first tower reserves land on the site for future phase of the Midtown project.

NCR CEO Bill Nuti has said the intown shift is designed to help the company tap student and faculty talent at Georgia Tech. Payment processor Worldpay US and a number of other tech companies have made similar relocation announcements in recent years.

The AJC first reported NCR's plans last year to relocate to Midtown from Gwinnett County. NCR said in January 2015 it would shift 3,600 jobs to Midtown.

At the time, NCR said it planned to maintain a second office campus in the northern suburbs, in Gwinnett or elsewhere. It is not clear if those plans are still on the table.

Cousins officials said last week in the company’s second quarter earnings call that the size and cost of the NCR project was fluctuating and likely would continue to as a design is finalized.

In response to an analyst’s question concerning Cousins’ portfolio of development sites, Cousins Chief Financial Officer Gregg Adzema said the second phase of the NCR project is “about to start.”

Staff writer Greg Bluestein contributed to this report.