The Dunkin’ doughnuts and coffee chain has confirmed it’s held talks to be taken private by a private equity firm, sending its shares rocketing to an all-time high Monday.

Dunkin’ Brands Group said it’s in preliminary discussions with Inspire Brands, which also owns Arby’s and Jimmy John’s Sandwiches. In a prepared statement Sunday, Dunkin’ said it is not yet certain a deal would be reached and would not comment further.

Inspire Brands said it had no comment Monday.

Dunkin’ shares jumped $14.31, or 16.1% to close Monday at $103.10.

Dunkin’, based in Canton, Massachusetts, also owns the Baskin-Robbins ice cream chain. There are 13,000 Dunkin’ stores and 8,000 Baskin-Robbins outlets worldwide.

Both brands have significant history. Dunkin’ was founded in 1950 in Quincy, Massachusetts. Baskin-Robbins — known for its promise of 31 flavors — was founded in 1945 in Glendale, California.

But the global pandemic has hurt sales. Dunkin’ Brands revenue fell 20% in the second quarter, and the company said franchisees closed 200 restaurants permanently. Dunkin’ Brands reported full-year sales of $1.4 billion in 2019, up 4% from the previous year.