Who owns COST? 13F holders and whale ownership
COST is tracked across public portfolios in Whale Analyzer. This page answers who owns COST, which top funds are buying COST, aggregate disclosed value, and recent position changes based on public data. NPS Korea is the largest reported holder at $930M; the top five funds control 100.0% of reported ownership; institutions were net selling last quarter (1 increased, 1 reduced); the stock trades above the aggregate whale cost basis of $438.15. Top tracked holders include NPS Korea, Tom Gayner, and Chris Bloomstran.
Continue to the live COST dashboardTop holders
| Investor | Reported value | Shares | Change |
|---|---|---|---|
| NPS Korea 13F portfolio National Pension Service holdings | $930.2M | 933.6K | Increased |
| Tom Gayner 13F portfolio Markel Group holdings | $39.0M | 39.1K | Held |
| Chris Bloomstran 13F portfolio Semper Augustus Investments holdings | $3.4M | 3.4K | Reduced |
Ownership concentration
Reported ownership of COST is highly concentrated across tracked institutions.
- Single largest holder: 95.6% of reported ownership
- Top 5 holders: 100.0%
- Top 10 holders: 100.0%
Whale activity this quarter
Across 3 tracked institutions, 1 increased, 1 held, 1 reduced. Net positioning is net selling.
- NPS Korea — National Pension Service ($930.2M) (▲ 1.6% qoq shares) · avg cost $449.79
- Tom Gayner — Markel Group ($39.0M) (→ 0.0% qoq shares) · avg cost $160.51
- Chris Bloomstran — Semper Augustus Investments ($3.4M) (▼ 2.3% qoq shares)
Whale cost basis vs current price
The aggregate tracked cost basis is $438.15 versus a current price of $952.54, so COST trades above its cost basis (+117.4%). Average unrealized P&L across tracked holders: 360%.
Sector positioning — Consumer Staples
COST sits within the Consumer Staples sector alongside 25 other tracked names. Compare whale ownership across peers:
How to use this page
Values are reported public positions from tracked 13F filers and disclosures — not real-time ownership totals. Open the live COST dashboard for price charts and cross-investor scans, or read the SEC 13F guide.
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Learn more in Whale Analyzer Academy
Deepen your read on COST with these Whale Analyzer Academy guides:
Frequently asked questions
Who owns COST stock?
Whale Analyzer tracks 3 public institutional holders of COST with a combined reported value of $972.6M. See the holder table above for the largest tracked positions.
Which top funds are buying COST?
Tracked institutions were net selling last quarter — 1 increased, 1 held, 1 reduced. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is COST ownership?
The top five tracked holders report 100.0% of aggregate ownership.
Is COST above or below the whale cost basis?
The aggregate tracked cost basis is $438.15 versus a current price of $952.54 (+117.4%).
What does 13F ownership mean for COST?
Use the interactive COST dashboard on Whale Analyzer for real-time holder analysis, or read our 13F Alpha Signals Guide.