Edelman, FleishmanHillard and Ogilvy scored top scores in Human Rights Campaign's ratings of workplaces for lesbian, gay, bisexual, transgender and queer employees.

The survey found that Corporate America is moving ahead with its efforts to become more inclusive.

The HRC’s newly released Corporate Equality Index 2018 gave 609 businesses its top score of 100—a jump of 18 percent from last year’s survey, when 517 companies scored 100. The CEI rates companies and top law firms on detailed criteria falling under five broad categories: non-discrimination policies, employment benefits, demonstrated organizational competency and accountability around LGBTQ diversity and inclusion, public commitment to LGBTQ equality and responsible citizenship.

Human Rights Corporate Equality Index 2018

When results are broken out by industry, 32 out of 39 respondents in the consulting and business services sector racked up a 100 score, including Booz Allen Hamilton, Bain & Co., Deloitte and SapientRazorfish.

In the advertising and marketing sector, 17 out of 22 companies hit the 100 mark, including Edelman, Fleishman-Hillard, Interpublic Group, Ogilvy and Omnicom.

According to the survey, 91 percent of respondents now include sexual orientation in their non-discrimination policy, up from 61 percent in 2002, the first year in which the CEI was conducted. But that increase is dwarfed by the rise in support for transgender rights, with 83 percent of responding companies now including gender identity in their non-discrimination protections, up from just three percent in 2002.

As regards other workplace policies, 88 percent of responding companies have inclusive diversity training, 83 percent offer a robust set of practices (at least three efforts) to support organizational LGBTQ diversity competency and 79 percent offered transgender-inclusive health care coverage options through at least one firm-wide plan.