John Paulson, Stanley Druckenmiller and George Soros are among billionaire investors who would no longer have to reveal which stocks they own under a U.S. plan to ease disclosure rules -- hardly the smaller fund managers that regulators say the overhaul is supposed to benefit. While the legendary traders all oversee billions of dollars, the value of each of their firms’ equity holdings traded on U.S. exchanges is less than the $3.5 billion threshold that would trigger public reporting in the Securities and Exchange Commission’s proposal.