Firebrand presidential candidate Ted Cruz has said that Big Business has a “radical gay-marriage agenda,” and he’s onto something. Even before gay marriage was widely supported by the public, more than half of the Fortune 500 were offering health insurance and other benefits to same-sex couples. Today 66% of the 500 offer same-sex partner benefits, and 89% explicitly prohibit discrimination on the basis of sexual orientation. Popular support for same-sex marriage hasn’t quite reached comparable levels, but the gap between public sentiment and corporate behavior has certainly narrowed. Regardless of how the Supreme Court rules in June on legalizing same-sex unions in all 50 states, that marriage agenda no longer seems so radical.

A version of this article appears in the June 15, 2015 issue of Fortune magazine.