Alexander Navab, a former senior executive at private equity firm KKR, is launching a buyout firm that will focus on midsize-to-large transactions, seeking to take advantage of an area of the market where he sees less competition.

Navab, who served until 2017 as the head of KKR’s private equity business in the Americas, has assembled a group of veteran investors from firms such as Baupost Group, Carlyle Group and Warburg Pincus.