Whale Analyzer
COST Institutional Holders and 13F Ownership
Compare 10 tracked holders of COST, their reported positions and disclosed changes. Coverage is limited to the investors tracked by Whale Analyzer; these records do not establish all shareholders or current trades. Available original SEC filings for tracked 13F holders are linked below. Top tracked holders include National Pension Service, Capital Research Global Investors, Markel Group, and Bridgewater Associates.
Continue to the live COST dashboardTop holders
| Investor | Reported value | Shares | Change | Report date |
|---|---|---|---|---|
| National Pension Service 13F holdings | $904.3M | 966.7K | Increased | 2026-06-30 |
| Capital Research Global Investors 13F holdings | $426.7M | 456.2K | Reduced | 2026-06-30 |
| Markel Group 13F holdings | $30.7M | 33.7K | Reduced | 2026-09-30 |
| Bridgewater Associates 13F holdings | $24.8M | 26.5K | Reduced | 2026-06-30 |
| Gardner Russo & Quinn 13F holdings | $3.2M | 3.4K | Reduced | 2026-06-30 |
| Semper Augustus Investments 13F holdings | $3.1M | 3.4K | Reduced | 2026-06-30 |
| Mairs & Power Funds 13F holdings | $2.8M | 3.0K | Held | 2026-06-30 |
| Torray Funds 13F holdings | $509.8K | 560 | Reduced | 2026-09-30 |
| Matrix Asset Advisors 13F holdings | $501.4K | 551 | Held | 2026-09-30 |
| Oakmark Funds 13F holdings | $334.9K | 358 | Reduced | 2026-06-30 |
Original SEC filing sources
These recorded filings support the tracked 13F rows included in the aggregate reported values on this page. See each holder profile for source coverage and context for other disclosure types.
- National Pension Service SEC filing (0001193125-26-347818) · report date 2026-06-30
- Capital Research Global Investors SEC filing (0001422848-26-000094) · report date 2026-06-30
- Markel Group SEC filing (0001096343-26-000085) · report date 2026-09-30
- Bridgewater Associates SEC filing (0001350694-26-000003) · report date 2026-06-30
- Gardner Russo & Quinn SEC filing (0000860643-26-000005) · report date 2026-06-30
- Semper Augustus Investments SEC filing (0001941040-26-000625) · report date 2026-06-30
- Mairs & Power Funds SEC filing (0001172661-26-003496) · report date 2026-06-30
- Torray Funds SEC filing (0001193125-26-439683) · report date 2026-09-30
- Matrix Asset Advisors SEC filing (0001172661-26-004502) · report date 2026-09-30
- Oakmark Funds SEC filing (0000813917-26-000042) · report date 2026-06-30
Tracked-sample concentration
Reported position value for COST is highly concentrated within this tracked-holder sample. These percentages are not market-wide ownership shares.
- Largest tracked holder: 64.7% of aggregate reported value in this sample
- Top 5 tracked holders: 99.5% of aggregate reported value in this sample
- Top 10 tracked holders: 100.0% of aggregate reported value in this sample
Whale activity this quarter
Across 10 tracked holders, 7 reduced, 2 held, 1 increased. Net positioning is net selling.
- National Pension Service ($904.3M) (▲ 3.6% qoq shares) · modeled avg cost estimate $466.44
- Capital Research Global Investors ($426.7M) (▼ 24.9% qoq shares)
- Markel Group ($30.7M) (▼ 13.8% qoq shares) · modeled avg cost estimate $30.29
- Bridgewater Associates ($24.8M) (▼ 4.0% qoq shares)
- Gardner Russo & Quinn ($3.2M) (▼ 26.5% qoq shares)
- Semper Augustus Investments ($3.1M) (▼ 0.4% qoq shares)
- Mairs & Power Funds ($2.8M) (→ 0.0% qoq shares)
- Torray Funds ($509.8K) (▼ 10.8% qoq shares) · modeled avg cost estimate $999.15
Modeled cost estimate vs current price
The share-weighted modeled cost estimate across 3 covered tracked holders is $452.04 versus a current price of $1053.56, so COST trades above that estimate (+133.1%). This model does not establish any filer's actual purchase price, unrealized gain, or investment return.
Sector positioning — Consumer Staples
COST sits within the Consumer Staples sector alongside 30 other tracked names. Compare reported positions across tracked peers:
How to use this page
Values are reported public positions from tracked 13F filers and disclosures — not real-time or market-wide 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 10 public-disclosure holders of COST with a combined reported value of $1.40B. See the holder table above for the largest tracked positions.
Which top funds are buying COST?
Tracked holders were net selling last quarter — 7 reduced, 2 held, 1 increased. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is the tracked COST sample?
The top five tracked holders account for 99.5% of aggregate reported value in this tracked sample. This is not a market-wide ownership percentage.
How does COST compare with the modeled cost estimate?
The share-weighted modeled cost estimate across 3 covered tracked holders is $452.04 versus a current price of $1053.56 (+133.1%). It is not an actual purchase price, unrealized gain, or investment return.
What does 13F ownership mean for COST?
These are historical reported positions from tracked filers, not real-time ownership or a complete shareholder register. Use the interactive COST dashboard to explore them, or read our 13F Alpha Signals Guide.