Sinegal recently announced that he'll step down as CEO of Costco in January 2012, handing the reins to current president and COO Craig Jelinek. It's been an extraordinary run for
Sinegal, a retail lifer who co-founded Costco with Jeffrey Brotman back in 1983. Costco was the first warehouse club to sell fresh food and operate gas stations and pharmacies. This
year, Costco handily outperformed big competitors like Sam's Club, generating sharply higher revenue per square foot.