Investors in Alphabet Inc., the parent company of Google, accused the web giant’s board of fostering a culture of “rampant sexual harassment” and covering up misconduct by senior male executives.

In a newly unsealed Delaware Chancery Court shareholder derivative complaint, four New York-based pension funds say corporate directors failed to maintain internal controls at Alphabet, leading the company to abandon its own policies governing sexual harassment and misconduct and causing it to pay “tens of millions of dollars” to corporate executives who were credibly accused.