Wall Street’s biggest players — from BlackRock to hedge-fund billionaires — are quietly hoarding a secret portfolio of “untouchable” mega-stocks in 2025. These 10 companies have sky-high institutional ownership, record-low selling activity, and relentless buying pressure from the world’s smartest investors. While retail traders chase hype, the whales are locking these stocks away like gold — and preparing for the next explosive wealth cycle.