Lampert’s bid is backed in part by $1.3 billion in financing from three different financial institutions, the spokesman for his hedge fund, ESL Investments Inc, said. It would preserve about 425 stores that Sears has yet to close, and secure the jobs of up to 50,000 workers out of the 68,000 employed by the retailer. An affiliate of ESL, Transform Holdco LLC, submitted the bid, the spokesman said.