Who owns CB? 13F holders and whale ownership
CB is tracked across public portfolios in Whale Analyzer. This page answers who owns CB, which top funds are buying CB, aggregate disclosed value, and recent position changes based on public data. Warren Buffett is the largest reported holder at $11.16B; the top five funds control 100.0% of reported ownership; institutions were net buying last quarter (4 increased, 1 reduced); the stock trades above the aggregate whale cost basis of $223.44. Top tracked holders include Warren Buffett, Capital Group, Andreas Halvorsen, and NPS Korea.
Continue to the live CB dashboardTop holders
| Investor | Reported value | Shares | Change |
|---|---|---|---|
| Warren Buffett 13F portfolio Berkshire Hathaway holdings | $11.16B | 34.2M | Held |
| Capital Group 13F portfolio Capital Research Global Investors holdings | $2.05B | 6.3M | Increased |
| Andreas Halvorsen 13F portfolio Viking Global Investors holdings | $422.1M | 1.3M | Increased |
| NPS Korea 13F portfolio National Pension Service holdings | $378.5M | 1.2M | Increased |
| Terry Smith 13F portfolio Fundsmith Equity Fund holdings | $26.7M | 257.2K | Reduced |
| Lee Ainslie 13F portfolio Maverick Capital holdings | $1.7M | 16.5K | New |
Ownership concentration
Reported ownership of CB is highly concentrated across tracked institutions.
- Single largest holder: 79.5% of reported ownership
- Top 5 holders: 100.0%
- Top 10 holders: 100.0%
Whale activity this quarter
Across 6 tracked institutions, 4 increased, 1 held, 1 reduced. Net positioning is net buying.
- Warren Buffett — Berkshire Hathaway ($11.16B) (→ 0.0% qoq shares) · avg cost $229.38
- Capital Group — Capital Research Global Investors ($2.05B) (▲ 10.7% qoq shares) · avg cost $191.48
- Andreas Halvorsen — Viking Global Investors ($422.1M) (▲ 27.7% qoq shares)
- NPS Korea — National Pension Service ($378.5M) (▼ 10.9% qoq shares) · avg cost $227.77
- Terry Smith — Fundsmith Equity Fund ($26.7M) (▼ 58.1% qoq shares) · avg cost $197.10
- Lee Ainslie — Maverick Capital ($1.7M) · avg cost $190.83
Whale cost basis vs current price
The aggregate tracked cost basis is $223.44 versus a current price of $341.44, so CB trades above its cost basis (+52.8%). Average unrealized P&L across tracked holders: 60%.
Sector positioning — Financials
CB sits within the Financials sector alongside 84 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 CB dashboard for price charts and cross-investor scans, or read the SEC 13F guide.
Related stock holder pages
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- GOOGL whale holders — ALPHABET INC
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Learn more in Whale Analyzer Academy
Deepen your read on CB with these Whale Analyzer Academy guides:
Frequently asked questions
Who owns CB stock?
Whale Analyzer tracks 6 public institutional holders of CB with a combined reported value of $14.04B. See the holder table above for the largest tracked positions.
Which top funds are buying CB?
Tracked institutions were net buying last quarter — 4 increased, 1 held, 1 reduced. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is CB ownership?
The top five tracked holders report 100.0% of aggregate ownership.
Is CB above or below the whale cost basis?
The aggregate tracked cost basis is $223.44 versus a current price of $341.44 (+52.8%).
What does 13F ownership mean for CB?
Use the interactive CB dashboard on Whale Analyzer for real-time holder analysis, or read our 13F Alpha Signals Guide.