Complex sentence: In November 2012, a class action lawsuit was filed on behalf of shareholders alleging that Blyth overstated the nature and ongoing viability of strong financial results reported for ViSalus, which masked declining performance in Blyth's other operating units and product lines.
Split into simpler sentences: In November 2012, a class action lawsuit was filed against Blyth on behalf of shareholders. The suit alleged that the nature and ongoing viability of strong financial results reported for ViSalus had been overstated, and that this was masking declining performance in Blyth's other operating units and product lines.