KBL Merger Corp. IV is the one of a growing number of special-purpose acquisition companies formed by a management team that have gone public this year­—a sign that the unique investment vehicle is making a comeback after a lull following the 2008 market downturn.

KBL, which raised $115 million for a blank check in an IPO, was one of four special-purpose acquisition companies, better known as SPACs, that Holland & Knight partner Bradley Houser and senior associate Shane Segarra have worked on this year.