Blackberry, who was once a leader in the mobile market says three of its executives will be stepping down including the chief financial officer.

Brian Bidulka, the CFO will be replaced by James Yersh, although Bidulka will still be an adviser through the end of the fiscal year. The chief operating officer, Kristian Tear and the chief marketing officer, Frank Boulben will also be leaving Blackberry.

Blackberry lost market share to Apple Inc’s iPhone and devices that are powered by Google Inc’s Android software. Its new line of devices powered by the BlackBerry 10 operating system have so far failed to win back customers.

New CFO James Yersh has worked at BlackBerry since 2008 – as senior vice president, controller and head of compliance.

Blacberry’s share was up to 0.5% at $6.27 on the Nasdaq this Monday, on Toronto’s stock it was up to 1.7% at C$6.62.

In the quarter ended August 31, BlackBerry reported a loss of nearly $1 billion, with revenues slumping 45% to $1.6 billion from a year earlier, as its new line of BlackBerry 10 devices failed to tempt buyers.