Spirit Airlines’ shares plunged more than 50% in early trading Wednesday, following a report that it is preparing to file bankruptcy — and the company’s announcement that it won’t report quarterly financial results because it’s scrambling to reach a deal with creditors.

Spirit Airlines is preparing to file for bankruptcy protection after merger talks with Frontier Airlines broke down, according to people familiar with the matter. The Florida-based budget airline is in advanced discussions with bondholders to hammer out a bankruptcy plan that would have support from a majority of creditors,

Financial troubles at Spirit Airlines have the company in negotiations to restructure debt it’s taken and put the outlook of the budget airline in doubt. Spirit