Casino mogul Steve Wynn, known for his work on the Mirage and Treasure Island in Las Vegas, has been accused of sexually harassing women and pressuring employees into performing sex acts, according to reports.

The news sent Wynn Resorts stock plummeting Friday as dozens of individuals revealed alleged patterns of sexually inappropriate behavior to the Wall Street Journal.

In one account, a manicurist accused Wynn of asking her to disrobe and have sex on the massage table in his office. Though she said she told Wynn she was married and did not want to, they ended up having sex, according to colleagues she recounted the story to, the WSJ reports. At the time, a report was filed with human resources and legal action was pursued. Wynn later settled with the manicurist for $7.5M.

According to employee accounts, the Wynn Resorts CEO’s history of alleged sexual misconduct stretches for decades and includes employees from various casinos, the WSJ reports. In a written statement, Wynn, who is also the Republican National Committee finance chair, said the accusations were preposterous and he has never assaulted any women.

“We find ourselves in a world where people can make allegations, regardless of the truth, and a person is left with the choice of weathering insulting publicity or engaging in multi-year lawsuits. It is deplorable for anyone to find themselves in this situation,” the soon-to-be 76-year-old wrote.

Company executives told the WSJ Wynn Resorts works hard to establish a culture of safety and respect, and said the company hosts anti-harassment training every year. The company also makes an anonymous anti-harassment hotline available to employees, and officials said zero complaints about Wynn in particular have come through the hotline.

Wynn Resorts stock fell 7.5% to $185.50 Friday. It was the largest drop the stock has experienced since July.