WATERLOO, Ont. -- Former BlackBerry chairman and CEO Jim Balsillie no longer has shares in the company, according to a filing with U.S. regulators.

The document provides little detail but indicates Balsillie, who resigned his positions with the Waterloo, Ont.-based company about a year ago, had no shares at the end of 2012.

At the end of 2011, he had more than 26 million shares of the company then called Research in Motion, according to filings obtained through DisclosureNet.com.

The shares had a market value of just under $15 a share at the end of 2011, making Balsillie's personal stake worth nearly $400 million.

The documents don't reveal how much Balsillie got for his stock or when the shares were sold.

BlackBerry (TSX:BB) stock had a lot of ups and downs last year, trading as high as $18.23 in January and as low as $6.10 in September.

They are currently about mid-way in that range at $13.42, down 58 cents on the Toronto Stock Exchange.