Agriculture Minister Edwin Poots is the bookies' favourite to succeed Arlene Foster as the next leader of the DUP.
The Lagan Valley MLA has the shortest odds at 4/6 followed by the constituency's MP Sir Jeffrey Donaldson at 2/1.
East Belfast MP Gavin Robinson is in third place with Sean Graham Bookmakers at 4/1.
Others in the running according to the betting firm are North Antrim MP Ian Paisley and South Belfast MLA Christopher Stalford, both at 6/1.
The 7/1 outsiders are Economy Minister Diane Dodds and Junior Minister Gordon Lyons.
Aside from these key names, Ladbrokes is also offering odds of 10/1 on deputy leader Nigel Dodds or East Antrim MP Sammy Wilson taking the top job.
The DUP has never had a formal contest to choose a new leader.
Indications are that it could be the case that the party attempts to split the First Minister and DUP leader positions.
