In a statement announcing the deal, JPRestaurants said the investment would “support the long-term future” of its brands.
There would be “a focus on maintaining the character and heritage of each venue”, it said, although “enhancements” would also be introduced, it added.
Managing director Robert Jones said he would remain the company’s “only other shareholder” and that he would retain a “significant” stake.
“In 2027, we will have been delighting islanders and visitors for 80 years and this new partnership brings a real opportunity to build on that legacy,” he said.
“The investment will help us adapt to Jersey’s dynamic restaurant scene and ensure we continue creating the experiences that our customers value most.
“We’ve built a loyal customer base over many decades, and there is a great deal that will remain unchanged, from our friendly, knowledgeable teams to our iconic locations.
“At the same time, guests can look forward to some carefully considered updates that will keep our sites fresh, exciting and fun.”