Whale Analyzer
Berkshire Hathaway (BRK.B) Institutional Holders and 13F Ownership
Compare 13 tracked holders of Berkshire Hathaway (BRK.B), 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. Bill Gates is the largest reported holder at $7.35B; the top five funds control 96.9% of reported ownership; institutions were net buying last quarter (6 increased, 4 reduced); the stock trades above the aggregate whale cost basis of $259.74. Top tracked holders include Bill Gates, Duan Yongping, NPS Korea, and Tom Gayner.
Continue to the live BRK.B dashboardTop holders
| Investor | Reported value | Shares | Change | Report date |
|---|---|---|---|---|
| Bill Gates 13F portfolio Bill & Melinda Gates Foundation holdings | $7.35B | 14.7M | Reduced | 2026-06-30 |
| Duan Yongping 13F portfolio H&H International Investment holdings | $4.62B | 9.2M | Increased | 2026-06-30 |
| NPS Korea 13F portfolio National Pension Service holdings | $1.40B | 2.8M | Increased | 2026-06-30 |
| Tom Gayner 13F portfolio Markel Group holdings | $766.6M | 1.5M | Held | 2026-06-30 |
| Li Lu 13F portfolio Himalaya Capital Management holdings | $554.6M | 1.1M | Increased | 2026-06-30 |
| Ruane, Cunniff & Goldfarb 13F portfolio Ruane, Cunniff & Goldfarb holdings | $150.5M | 300.7K | Reduced | 2026-06-30 |
| Chris Bloomstran 13F portfolio Semper Augustus Investments holdings | $136.7M | 273.1K | Increased | 2026-06-30 |
| George Soros 13F portfolio Soros Fund Management holdings | $66.7M | 133.3K | Held | 2026-06-30 |
| Guy Spier 13F portfolio Aquamarine Fund holdings | $48.8M | 97.6K | Held | 2026-06-30 |
| Bruce Berkowitz 13F portfolio Fairholme Capital Management holdings | $44.0M | 87.9K | Increased | 2026-06-30 |
| Horizon Kinetics 13F portfolio Horizon Kinetics Asset Management holdings | $18.6M | 37.2K | Reduced | 2026-06-30 |
| Chuck Akre 13F portfolio Akre Capital Management holdings | $4.1M | 8.2K | Reduced | 2026-06-30 |
Ownership concentration
Reported ownership of BRK.B is highly concentrated across tracked institutions.
- Single largest holder: 48.5% of reported ownership
- Top 5 holders: 96.9%
- Top 10 holders: 99.8%
Whale activity this quarter
Across 13 tracked institutions, 6 increased, 4 reduced, 3 held. Net positioning is net buying.
- Bill Gates — Bill & Melinda Gates Foundation ($7.35B) (▼ 13.8% qoq shares)
- Duan Yongping — H&H International Investment ($4.62B) (▲ 0.9% qoq shares) · avg cost $271.40
- NPS Korea — National Pension Service ($1.40B) (▲ 2.6% qoq shares) · avg cost $271.02
- Tom Gayner — Markel Group ($766.6M) (→ 0.0% qoq shares) · avg cost $144.97
- Li Lu — Himalaya Capital Management ($554.6M) (▲ 23.5% qoq shares) · avg cost $309.51
- Ruane, Cunniff & Goldfarb — Ruane, Cunniff & Goldfarb ($150.5M) (▼ 3.1% qoq shares)
- Chris Bloomstran — Semper Augustus Investments ($136.7M) (▲ 8.0% qoq shares) · avg cost $203.74
- George Soros — Soros Fund Management ($66.7M) (→ 0.0% qoq shares) · avg cost $479.20
Whale cost basis vs current price
The aggregate tracked cost basis is $259.74 versus a current price of $510.37, so BRK.B trades above its cost basis (+96.5%). Average unrealized P&L across tracked holders: 314%.
Sector positioning — Financials
BRK.B sits within the Financials sector alongside 83 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 BRK.B 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 BRK.B with these Whale Analyzer Academy guides:
Frequently asked questions
Who owns BRK.B stock?
Whale Analyzer tracks 13 public institutional holders of BRK.B with a combined reported value of $15.17B. See the holder table above for the largest tracked positions.
Which top funds are buying BRK.B?
Tracked institutions were net buying last quarter — 6 increased, 4 reduced, 3 held. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is BRK.B ownership?
The top five tracked holders report 96.9% of aggregate ownership.
Is BRK.B above or below the whale cost basis?
The aggregate tracked cost basis is $259.74 versus a current price of $510.37 (+96.5%).
What does 13F ownership mean for BRK.B?
These are historical reported positions from tracked filers, not real-time ownership or a complete shareholder register. Use the interactive BRK.B dashboard to explore them, or read our 13F Alpha Signals Guide.