As corporate diversity and inclusion programs come under attack, not all companies have scaled back.

At Costco’s annual meeting on Thursday, shareholders will vote on a proposal from the National Center for Public Policy Research, a conservative think tank, that would require the company to report on any potential risks diversity programs could pose to profits.

Ahead of the vote, Costco’s board delivered a full-throated defense of D.E.I., arguing that such initiatives reward shareholders and “enhance our capacity to attract and retain employees who will help our business succeed.”

Unlike Costco, some of the biggest companies in the country have rolled back efforts to increase workplace racial and gender equity — or at least been quieter about them. They’ve pulled back from these initiatives under pressure from discrimination lawsuits, campaigns by social media influencers like Robby Starbuck and efforts by President Trump, who on Tuesday signed an executive order directing government agencies to investigate D.E.I. programs at publicly traded corporations.

But Costco is one of several large public companies that are publicly maintaining D.E.I. efforts despite the mounting pressure. At many of those companies, commitments to diversity have been in place for more than a decade.

This month, Apple opposed a similar proposal from the think tank. “We strive to create a culture of belonging where everyone can do their best work,” its board wrote to shareholders.