LAS VEGAS (AP) — Nevada gambling regulators fined casino mogul Steve Wynn's former company a record $20 million on Tuesday for failing to investigate claims of sexual misconduct made against him before he resigned a year ago.

The penalty against Wynn Resorts Ltd. ends an investigation that began after The Wall Street Journal reported that several women said the company founder harassed or assaulted them.

Wynn Resorts will keep its gambling license under the Nevada Gaming Commission settlement reached last month. The four current commissioners unanimously approved the fine.

"It's not about one man," said Commissioner Philip Pro, a former federal court judge. "It's about a failure of a corporate culture to effectively govern itself as it should."

The previous highest fine in state history was $5.5 million in 2014 against the sports betting and mobile gambling system company now known as CG Technology. It runs sports betting operations at several Las Vegas casinos.

Commissioners John Moran Jr. and Deborah Fuetsch said they considered a higher fine, but did not specify an amount.

Chairman Tony Alamo said the amount "makes it clear to all licensees that this culture cannot be tolerated," while also letting the company "heal."

"It needs to move needles here," he said. "It needs to ring across the entire country."

Steve Wynn himself was not part of the Wynn Resorts settlement, and neither he nor any personal representatives attended the commission hearing.

One of Wynn's attorneys, Colby Williams, said by telephone that he was aware of the fine but declined to comment.

Wynn resigned as board chairman and company CEO in February 2018 following reports that several women said he harassed or assaulted them. Wynn also sold his shares in the company. He has denied all the allegations.

Wynn Resorts acknowledged in the settlement that several former board members and executives knew about but failed to investigate complaints including one that led Wynn to pay $7.5 million in 2005 to a former salon employee who alleged he raped her and that she became pregnant as a result.

"Mr. Wynn ... engaged in intimate and sexual conduct with (company) employees," the settlement document said.

The company also failed to investigate a cocktail server's allegation that from 2005 to 2006 Wynn pressured her into a nonconsensual sexual relationship, the documents said. Wynn paid a $975,000 private settlement to that woman and her parents, the settlement said.

Wynn Resorts neither admitted nor denied Nevada Gaming Control Board allegations that Wynn sexually harassed multiple flight attendants on company aircraft.

"The company's initial response during this period was driven by Mr. Wynn's adamant denial of all allegations," said a Wynn Resorts statement from company spokesman Michael Weaver. It acknowledged a "short-sighted focus on initially defending Mr. Wynn, rather than reassuring employees of the company's commitment to a safe and respectful work environment."

The company points to wholesale changes in the boardroom and executive offices, including hiring a new chief executive, requiring new sexual harassment prevention training for all employees and adding a women's leadership council to promote equality in the workplace.

Wynn's name was removed from the company's Massachusetts project now called Encore Boston Harbor.

"In sum, these 25,000 employees, led by CEO Matt Maddox and a reshaped board of directors, are the company that stands before the commission today, and not Steve Wynn," the company said in its Jan. 25 written agreement to settle the case.

A company settlement also is pending in Massachusetts, where gambling regulators launched a similar investigation of whether Wynn Resorts should be allowed to operate a more than $2 billion waterfront casino resort slated to open in June in the Boston area.

Steve Wynn sued to block the release of a Massachusetts Gaming Commission report on that investigation, arguing it contains confidential information that is protected by attorney-client privilege. A Nevada state court judge has temporarily blocked its release. A hearing in that case is scheduled Monday.

A former shareholder alleged in a case filed in December that his stock plummeted in value because company officials concealed information about accusations against Wynn.

Records show that Wynn Resorts traded at more than $200 per share before the Wall Street Journal report, and closed at about $165 after Wynn resigned. Company stock closed at $130.45 on Tuesday, up $1.25.