Bloomberg reported Bombardier may fetch as much as $5.4 billion if it decides to sell its rail unit, which has played a “stabilizing role” amid the struggles at the company’s aerospace business, according to AltaCorp Capital.

According to the Bloomberg report, Bombardier is discussing options with bankers about its rail business that could include a full or partial sale of the business or an initial public offering. The shares rose 1.5% to C$2.64 at the close in Toronto. They have fallen 36% this year.

Bloomberg reported a breakup could be the best way for Montreal-based Bombardier to overcome the struggles facing its aerospace business, analysts and investors have said. The rail unit, which includes subway cars, signaling and control equipment, is the healthier part of the company, with 2014 earnings before interest and taxes of $429 million compared with a loss of $995 million at the aerospace unit.

To view the full Bloomberg report, click here.