{
 "company": "Costco Wholesale",
 "ticker": "COST",
 "page": "https://www.moatshark.com/s/cost",
 "note": "Source: SEC filings via moatshark. Values and changes are estimates; not investment advice.",
 "holders": [
  {
   "manager": "Semper Augustus",
   "moatshark_slug": "semper-augustus",
   "period": "2026-06-30",
   "portfolio_pct": 0.35,
   "value_usd": 3137566,
   "change": "REDUCE",
   "share_change_pct": -0.4,
   "quarters_held": 53
  },
  {
   "manager": "Markel Group",
   "moatshark_slug": "markel-group",
   "period": "2026-06-30",
   "portfolio_pct": 0.28,
   "value_usd": 36623651,
   "change": "HOLD",
   "share_change_pct": 0,
   "quarters_held": 53
  },
  {
   "manager": "Gardner Russo & Quinn",
   "moatshark_slug": "gardner-russo-quinn",
   "period": "2026-06-30",
   "portfolio_pct": 0.04,
   "value_usd": 3179709,
   "change": "REDUCE",
   "share_change_pct": -26.5,
   "quarters_held": 34
  },
  {
   "manager": "Matrix Asset Advisors",
   "moatshark_slug": "matrix-asset-advisors",
   "period": "2026-09-30",
   "portfolio_pct": 0.04,
   "value_usd": 501409,
   "change": "HOLD",
   "share_change_pct": 0,
   "quarters_held": 15
  },
  {
   "manager": "Mairs & Power",
   "moatshark_slug": "mairs-power",
   "period": "2026-06-30",
   "portfolio_pct": 0.03,
   "value_usd": 2771798,
   "change": "HOLD",
   "share_change_pct": 0,
   "quarters_held": 53
  },
  {
   "manager": "Harris Associates (Oakmark)",
   "moatshark_slug": "harris-associates-oakmark",
   "period": "2026-06-30",
   "portfolio_pct": 0,
   "value_usd": 334898,
   "change": "REDUCE",
   "share_change_pct": -1.1,
   "quarters_held": 5
  },
  {
   "manager": "Horizon Kinetics",
   "moatshark_slug": "horizon-kinetics",
   "period": "2026-06-30",
   "portfolio_pct": 0,
   "value_usd": 0,
   "change": "EXIT",
   "share_change_pct": null,
   "quarters_held": 1
  }
 ]
}