Who owns BRK-A? 13F holders and whale ownership
BRK-A is tracked across public portfolios in Whale Analyzer. This page answers who owns BRK-A, which top funds are buying BRK-A, aggregate disclosed value, and recent position changes based on public data. Tom Gayner is the largest reported holder at $800M; the top five funds control 99.9% of reported ownership; institutions were net selling last quarter (1 increased, 1 reduced); the stock trades above the aggregate whale cost basis of $264083.11. Top tracked holders include Tom Gayner, Chris Bloomstran, Ruane, Cunniff & Goldfarb, and Guy Spier.
Continue to the live BRK-A dashboardTop holders
| Investor | Reported value | Shares | Change |
|---|---|---|---|
| Tom Gayner 13F portfolio Markel Group holdings | $800.0M | 1.1K | Held |
| Chris Bloomstran 13F portfolio Semper Augustus Investments holdings | $83.3M | 116 | Held |
| Ruane, Cunniff & Goldfarb 13F portfolio Ruane, Cunniff & Goldfarb holdings | $79.0M | 110 | Reduced |
| Guy Spier 13F portfolio Aquamarine Fund holdings | $21.5M | 30 | Held |
| Edgewood Management 13F portfolio Edgewood Management LLC holdings | $2.2M | 3 | Held |
| Bruce Berkowitz 13F portfolio Fairholme Capital Management holdings | $1.4M | 2 | Increased |
Ownership concentration
Reported ownership of BRK-A is highly concentrated across tracked institutions.
- Single largest holder: 81.0% of reported ownership
- Top 5 holders: 99.9%
- Top 10 holders: 100.0%
Whale activity this quarter
Across 6 tracked institutions, 4 held, 1 reduced, 1 increased. Net positioning is net selling.
- Tom Gayner — Markel Group ($800.0M) (→ 0.0% qoq shares) · avg cost $257930.51
- Chris Bloomstran — Semper Augustus Investments ($83.3M) (→ 0.0% qoq shares) · avg cost $263736.99
- Ruane, Cunniff & Goldfarb — Ruane, Cunniff & Goldfarb ($79.0M) (▼ 4.3% qoq shares)
- Guy Spier — Aquamarine Fund ($21.5M) (→ 0.0% qoq shares) · avg cost $480280.00
- Edgewood Management — Edgewood Management LLC ($2.2M) (→ 0.0% qoq shares) · avg cost $225760.00
- Bruce Berkowitz — Fairholme Capital Management ($1.4M) (▲ 100.0% qoq shares) · avg cost $525690.50
Whale cost basis vs current price
The aggregate tracked cost basis is $264083.11 versus a current price of $745140.00, so BRK-A trades above its cost basis (+182.2%). Average unrealized P&L across tracked holders: 132%.
Sector positioning — Financials
BRK-A 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 BRK-A 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-A with these Whale Analyzer Academy guides:
Frequently asked questions
Who owns BRK-A stock?
Whale Analyzer tracks 6 public institutional holders of BRK-A with a combined reported value of $987.4M. See the holder table above for the largest tracked positions.
Which top funds are buying BRK-A?
Tracked institutions were net selling last quarter — 4 held, 1 reduced, 1 increased. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is BRK-A ownership?
The top five tracked holders report 99.9% of aggregate ownership.
Is BRK-A above or below the whale cost basis?
The aggregate tracked cost basis is $264083.11 versus a current price of $745140.00 (+182.2%).
What does 13F ownership mean for BRK-A?
Use the interactive BRK-A dashboard on Whale Analyzer for real-time holder analysis, or read our 13F Alpha Signals Guide.