The hedge fund, which earlier supported a deal with Valeant, told Allergan CEO David Pyott that it would now support a deal with Shire, the sources said. It was not immediately clear whether Allergan would pursue such a deal. Paulson had a 1.9 percent stake in Allergan, making it one of the company’s top 10 shareholders, according to Thomson Reuters data as of June 30. Paulson was also Shire’s third-largest shareholder, according to the data.