13 Classic Companies Top HRC's New Corporate Equality Index

More than 300 corporations earned perfect scores on this year's CEI, including 13 of the top 20 Fortune 500 companies.

BY Sunnivie Brydum

December 09 2013 3:49 PM ET

McKesson Corp.

The San Francisco-based health care information technology giant earned its first perfect score this year, after adding LGBT-inclusive benefits piecemeal to slowly raise its score over the past 10 years. Last year, McKesson earned a 75, so moving up to 100 means the company genuinely stepped up its efforts to become a great place for LGBT employees to work in 2013.