San Diego, Dec. 8, 2011 (Shareholders Foundation) -- An investigation on behalf of investors in Jaguar Mining Inc. (NYSE:JAG) shares over possible breaches of fiduciary duties by certain directors and officers at Jaguar Mining was announced.

The investigation by a law firm focuses on possible shareholder claims based on potential breaches of fiduciary duties. Specifically the investigation concerns whether certain directors and officers at Jaguar Mining Inc. (Public, NYSEARCA:JAG breached their fiduciary duties in connection with certain statements regarding Jaguar Mining Inc. (Public, NYSEARCA:JAG business, its prospects and its operations were materially false and misleading at the time they were made.

Jaguar Minings annual Revenue rose from $47.83million for 2007 to $170.79million and its Net Income increased over the same time frame from a Net Loss of $49.78million to a Net Income of $22.18million.

Then on Nov. 16, 2011, Jaguar Mining Inc. (JAG: TSX/NYSE) announced that over the past weeks it has received proposals to buy the Company.

Shares of Jaguar Mining Inc. (TSX: JAG) (NYSE: JAG) jumped from $5.39 on November 15, 2011 to $7.80 per share on November 16, 2011.

Then on December 6, 2011, Jaguar Mining Inc. (TSX: JAG) (NYSE: JAG) announced that Daniel Titcomb will be leaving his role as President and Chief Executive Officer of Jaguar Mining Inc effective December 6, 2011.

Following the announcement NYSE JAG shares fell from $7.24 per share on Dec. 6th to $6.55 on December 7, 2011.