Retaining its spot as the largest company in the world, the retail giant spent the last year making strides toward becoming friendlier to its workers and the environment. Long derided for the limited health-care packages offered to its employees, the company focused on expanding its options. As of January, 93.7% of Wal-Mart’s U.S. employees had some form of health care, up from 90.4% last year.

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