{
 "company": "Regeneron Pharmaceuticals",
 "ticker": "REGN",
 "page": "https://www.moatshark.com/s/regn",
 "note": "Source: SEC filings via moatshark. Values and changes are estimates; not investment advice.",
 "holders": [
  {
   "manager": "Southeastern Asset Management",
   "moatshark_slug": "southeastern-asset-management",
   "period": "2026-06-30",
   "portfolio_pct": 4.95,
   "value_usd": 94978860,
   "change": "ADD",
   "share_change_pct": 16.6,
   "quarters_held": 6
  },
  {
   "manager": "Dodge & Cox",
   "moatshark_slug": "dodge-cox",
   "period": "2026-06-30",
   "portfolio_pct": 1.59,
   "value_usd": 3037348765,
   "change": "ADD",
   "share_change_pct": 9.3,
   "quarters_held": 19
  },
  {
   "manager": "Horizon Kinetics",
   "moatshark_slug": "horizon-kinetics",
   "period": "2026-06-30",
   "portfolio_pct": 0,
   "value_usd": 402183,
   "change": "REDUCE",
   "share_change_pct": -4.4,
   "quarters_held": 14
  }
 ]
}