Ulster Unionist Jenny Palmer took a second seat for the party during last year's Assembly election.
Mike Nesbitt will be hoping the party can secure both Ms Palmer and Robbie Butler this year. Butler replaced former Ulster Unionist Basil McCrea's seat, following his ultimately unsuccessful NI21 party, which he set up in 2013 alongside John McCallister.
However, the DUP is fielding the same three candidates who were successful in 2016. Paul Givan topped the poll, followed by Edwin Poots, while Brenda Hale finished fourth overall.
But with the fallout from the Renewable Heat Incentive (RHI) still looming, it's not yet clear how much that will swing traditional DUP voters to their unionist alternatives.
Holding on to a seat since 1998, Trevor Lunn will be hoping to secure enough transfers to keep his Assembly job.
There are 13 candidates running on March 2. That will also include the SDLP's Pat Catney, Peter Doran for Sinn Fein and Sammy Morrison for the TUV.
The Green Party and NI Conservatives are also fielding one candidate each, while there are also two independents on the ballot papers. Among them is Lisburn-man Jonny Orr.