ExxonMobil shareholders have again voted down a proposal to add gay and transgender employees to the Irving-based corporation’s nondiscrimination policy.

Meeting at the Meyerson Symphony Center in the Dallas Arts District, the ExxonMobil shareholders voted 80 percent to 20 percent Wednesday morning against a resolution asking the corporation to amend “its written equal employment opportunity policy to explicitly prohibit discrimination based on sexual orientation and gender identity and to substantially implement the policy.”

The proposal has been introduced each year since Mobil and Exxon merged in 1999. The highest level of support came in 2008 at nearly 40 percent.

“It’s disappointing, but this isn’t the end of the issue for us,” said Resource Center Dallas’ Rafael McDonnell, who has lobbied the company on the issue. “We’re going to continue to reach out and engage them. … I think the White House needs to go back and revisit this executive order.”

The proposed executive order would require contractors to include sexual orientation and gender identity in their nondiscrimination policies if they do business with the federal government, which Exxon does. However, President Barack Obama’s administration indicated earlier this year that he doesn’t plan to sign the proposed order anytime soon.

Mobil was one of the first companies in the world to include sexual orientation in its nondiscrimination policy and offer benefits to the same-sex partners of gay employees. But ExxonMobil rescinded those policies after the merger.

Outside the meeting, dozens of protesters lined Flora Street in front of the Meyerson on Wednesday. About 50 people with organizations including Code Pink, United Steel Workers and Occupy Dallas joined GetEQUAL protesters to shout for equality and ending discrimination, while a handful of protesters parodied the CEOs that make the choices and profit from ExxonMobil.

Daniel Cates, North Texas regional coordinator for GetEQUAL, who helped organized the protest, said he wouldn’t be surprised by the vote regardless of the result.

“The people that are against it seem very against it. The people who are for it really done a good job of pushing it this year,” he said. “We’ve got a better shot than in the past.”

As for Exxon not voting in favor of adding the protections in the past, Cates said the company had not learned to change and be more inclusive, which would ultimately hurt business.

“They clinging to antiquated business practices,” he said. “It’s a matter of really learning that this is good for business.”

This year, the resolution was initiated by New York State Comptroller Thomas DiNapoli, who wants the company to not only amend the nondiscrimination policy, but also to begin offering health benefits to the spouses of employees married in the Empire State.

The comptroller controls the state’s pension funds. As of May 18, New York’s pension fund held more than 16 million shares of ExxonMobil worth more than $1 billion.

ExxonMobil has called the measure unnecessary. It says the company is a “meritocracy” for its 82,000 workers worldwide, and that it already prohibits all forms of discrimination.

This is also the first year ExxonMobil appealed to the Securities and Exchange Commission to have the shareholder resolution thrown out. The company based its claim on a nondiscrimination statement in its Corporate Careers publication.

The SEC refused to allow ExxonMobil to throw out the resolution, saying the publication doesn’t have the weight of a corporate nondiscrimination policy.

Meanwhile, ExxonMobil maintains the lowest possible rating on the Human Rights Campaign’s Corporate Equality Index, with a minus-25.

In response to Wednesday’s vote, the Human Rights Campaign issued a statement noting that as of 2012, 86 percent of Fortune 500 companies include sexual orientation in their EEO policy and 50 percent include gender identity.

“The shareholder resolution to add sexual orientation and gender identity to ExxonMobil’s EEO policy was a non-binding referendum and the company still has the chance to do the right thing,” said HRC President Joe Solmonese. “As perhaps the largest corporation in the country, ExxonMobil has a responsibility to be a good corporate citizen; sadly they have fallen far short. The company has resisted offering basic employment protections for their LGBT workers for years and it’s time they treat all of their employees like the valuable assets they are.”