Both Snopes.com and PolitiFact reported that the ownership claim wasn't true, but the billionaire Saudi prince's investment company owns a smaller amount of 21st Century Fox.
Fact: The saudi prince owns enough newscorp stock to make a phonecall and change Fox news reporting guidelines.
Unless you think the prince is telling a lie on himself?
From the Guardian article:
“It is not the first time he has admitted to trying to influence Mr Murdoch’s coverage of sensitive issues.
In a recent Financial Times interview the prince said he did not wish to “intrude” into the management of companies in which he holds shares.”
“Alwaleed owns the largest chunk of News Corp. stock outside the Murdoch family. Shortly after his purchase of 5.5 percent of News Corp. voting shares in 2005, Alwaleed gave a speech that made it clear just what he had bought. As noted in The (U.K.) Guardian, Alwaleed told an audience in Dubai that it took just one phone call to Rupert Murdoch — “speaking not as a shareholder but as a viewer,” Alwaleed said — to get the Fox News crawl reporting “Muslim riots” in France changed to “civil riots.””