Sears Holdings has been exploring alternatives — including partnerships for its Kenmore, Craftsman and Diehard brands, and its Sears Home Services unit since May — as it looks to reinvigorate its ailing business. In a filing with regulators, Sears said Lampert met with representatives of Sears Hometown on Thursday to seek their participation in the process. Sears Holdings has lost more than $8 billion over the last five years and posted a quarterly profit just once in the last four years.