A lawsuit seeking class-action status was filed on Wednesday against Harvey Weinstein, Miramax, the Weinstein Company and members of its board, claiming that these entities worked to “perpetuate and conceal Weinstein’s widespread sexual harassment and assault,” a cover-up that amounts to civil racketeering.

In a joint statement, the six plaintiffs said, “We are but six women representing hundreds” who have been harassed or assaulted by Mr. Weinstein.

The suit names several former and current Weinstein Company board members, including Bob Weinstein, Harvey’s brother who heads The Weinstein Company; James Dolan, owner of the New York Knicks; Marc Lasry, a co-owner of the Milwaukee Bucks; Paul Tudor Jones, a hedge fund manager; and Lance Maerov, an executive at WPP; as well as many yet-to-be-identified officials at the companies.

Mr. Weinstein, an entertainment mogul and movie producer, was fired after an avalanche of accusations since October, when The New York Times and The New Yorker reported that Mr. Weinstein had paid off sexual harassment accusers for decades.