Subway's US expansion has slowed in the past two years. It added 313 net restaurants last year, 638 in 2013 and 804 in 2012, the franchise document shows. All of the company's more than 27,000 US locations were owned by franchisees as of the end of last year.
Subway isn't focused on adding restaurants now and instead wants to boost sales at its existing ones. The company has seen "positive momentum" for same-store sales this year, said Kevin Kane, a spokesman.
"Development has not been a focus over the past few years and has been put on the back burner," Kane said. "We are still opening stores, but our current focus is on working with franchisees to improve store sales."
Last year, DeLuca said the Milford, Connecticut-based chain could add 7,000 or 8,000 more units, bringing the total to more than 33,000. He said it could take a decade to do so.
However, Teixeira said there already may be too many Subway restaurants.
"There's definitely oversaturation," Teixeira said. "It's become more and more difficult to be able to locate franchisees who are willing to open a Subway."
- Bloomberg