Rosetta Stone in talks with private equity

The activist target, Rosetta Stone, has kicked up some interest from private equity.  Rosetta is the target of John Lewis' Osmium Partners and David Nierenberg's Nierenberg Investment Management.

The company received an expression of interest from RDG Capital Fund Management. Of course, the board is "carefully evaluating the expression of interest." This comes as the board notes that the company is actively implementing its strategic plan, which it believes will deliver attractive value for shareholders.

Shares are up 15% on the news, but long-term shareholders still aren't pleased.