Fulham Shore, which also owns The Real Greek, will grow to 79 restaurants by Christmas as it accelerates its expansion in the UK and abroad.
It recently opened a new London site in Blackheath, and has a pipeline with 20 more potential sites for the chains in solicitors’ hands.
Revenues in its 17 West End and city centre sites are now 3% above 2019 levels "as office worker and tourist footfall improve".
Chairman David Page said increased sales have helped the group offset soaring staffing and input costs, and that the company "continues to trade ahead of our own expectations".
He said: “Fulham Shore continues to experience growing sales across both our businesses. Many of our restaurants throughout the UK continue to break trading records on a regular basis.
"We are maintaining margins in both our businesses as the rise in our restaurant sales is enabling the group to deal with the well flagged inflation of utility costs and the wage increases that have been instigated."
Shares surged by as much as 8%, or 1.4p, to 18.15p, on the update on Thursday morning.