Check Capital Management Inc holds a concentrated book of 49 stocks worth $1.6B as of Q1 2026 (disclosed May 4, 2026, a ~45-day 13F lag). This quarter they trimmed Alphabet. Their largest long position is Berkshire Hathaway Inc-CL B at 33% of the equity book. They also disclosed $1.8B in call options (bullish), shown separately below and excluded from the equity book. Cloning the disclosed picks since 2013 would be +186% (+8.6%/yr). That is a simulation of the disclosed long book, not audited returns.
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curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/funds/1032814/holdings"
Use Arkolith to show CHECK CAPITAL MANAGEMENT INC/CA's latest holdings, largest changes, and filing provenance.
The reported book (valued from quarter-end) returned +229.8%, a 43.6-point gap that is the cost of the ~45-day 13F disclosure lag a real follower can't avoid.
Growth of $10,000 cloning Check Capital Management Inc's disclosed long 13F book, rebalanced on each filing date (so it reflects the ~45-day reporting lag, no look-ahead), total-return basis (dividends reinvested), derived from end-of-day prices. “Their reported book” values the same picks from quarter-end, before they were public. S&P 500 is SPY total return over the same window. Excludes shorts, cash, options and non-13F holdings. Not investment advice.
Top-heavy: concentrated book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
85% mapped to company sectors
Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.
Estimated $ traded · quarter-end prices, no cost basis
Other tracked managers holding the same core names as Check Capital Management Inc
| Manager / fund | Shared names | Their $ in those |
|---|---|---|
| BlackRock, Inc. | 44 / 49 | $1.6T |
| FMR LLC | 44 / 49 | $593.3B |
| MORGAN STANLEY | 44 / 49 | $377.4B |
| ROYAL BANK OF CANADA | 44 / 49 | $107.1B |
| UBS Group AG | 44 / 49 | $90.7B |
| FIFTH THIRD BANCORP | 44 / 49 | $13.4B |
| Parallel Advisors, LLC | 44 / 49 | $980.5M |
| VANGUARD GROUP INC | 43 / 49 | $2.1T |
Ranked by how many of Check Capital Management Inc's top 49 disclosed names each fund also holds: a cross-fund conviction signal from the latest 13F of every tracked manager.
Bars show each stock's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Berkshire Hathaway COM | $531.1M | 1.11M | 32.7% | ▲+0.5% Added · +6K sh | |
| 2 | Alphabet COM | $198.0M | 690.4K | 12.2% | ▼−1.9% Reduced · −13K sh | |
| 3 | Brookfield Corp. COM | $177.3M | 4.38M | 10.9% | ▼−0.2% Reduced · −9K sh | |
| 4 | Markel COM | $147.2M | 76.9K | 9.1% | ▼−0.6% Reduced · −427 sh | |
| 5 | AerCap Holdings COM | $112.2M | 817.7K | 6.9% | ▼−1.2% Reduced · −10K sh | |
| 6 | First Citizens COM | $83.1M | 44.1K | 5.1% | ▲+3.0% Added · +1K sh | |
| 7 | Sirius XM COM | $67.9M | 2.94M | 4.2% | ▲+2.0% Added · +59K sh | |
| 8 | LKQ Corp COM | $56.3M | 1.92M | 3.5% | ▲+23% Added · +359K sh | |
| 9 | Amazon COM | $42.5M | 204.1K | 2.6% | ▲59× Added · +201K sh | |
| 10 | Disney (Walt) COM | $42.3M | 438.5K | 2.6% | ▲+0.4% Added · +2K sh | |
| 11 | Hershey Foods COM | $40.0M | 192.3K | 2.5% | ▲+0.8% Added · +2K sh | |
| 12 | Cimpress COM | $34.4M | 471.5K | 2.1% | ▲+16% Added · +65K sh | |
| 13 | Jefferies COM | $28.1M | 680.2K | 1.7% | ▲+50% Added · +228K sh | |
| 14 | Berkshire Hathaway 'A' COM | $20.8M | 29 | 1.3% | —Held | |
| 15 | Wayfair COM | $12.6M | 167.9K | 0.8% | ▲+0.5% Added · +756 sh | |
| 16 | Apple COM | $5.9M | 23.1K | 0.4% | ▼−9.1% Reduced · −2K sh | |
| 17 | Biglari Cl A COM | $2.7M | 1.6K | 0.2% | ▼−28% Reduced · −622 sh | |
| 18 | Microsoft COM | $2.3M | 6.1K | 0.1% | ▼−0.8% Reduced · −47 sh | |
| 19 | Amgen COM | $1.4M | 3.9K | 0.1% | —Held | |
| 20 | Caterpillar Tractor COM | $1.2M | 1.7K | 0.1% | —Held | |
| 21 | Alphabet Class A COM | $1.1M | 3.7K | 0.1% | ▲+1.6% Added · +60 sh | |
| 22 | Trupanion Inc. COM | $1.0M | 40.7K | 0.1% | ▼−0.2% Reduced · −85 sh | |
| 23 | Goldman Sachs COM | $1.0M | 1.2K | 0.1% | —Held | |
| 24 | Tesla Motors COM | $929K | 2.5K | 0.1% | —Held | |
| 25 | General Electric COM | $848K | 3.0K | 0.1% | ▼−7.7% Reduced · −250 sh | |
| 26 | GE Vernova COM | $786K | 901 | 0.0% | ▼−8.8% Reduced · −87 sh | |
| 27 | Corning COM | $687K | 5.0K | 0.0% | —Held | |
| 28 | Raytheon Technologies COM | $673K | 3.5K | 0.0% | —Held | |
| 29 | SPDR S&P 500 ETF | $628K | 965 | 0.0% | —Held | |
| 30 | IShares Exponential Technologi ETF | $600K | 8.8K | 0.0% | —Held | |
| 31 | Bank of America COM | $587K | 12.0K | 0.0% | ▼−85% Reduced · −68K sh | |
| 32 | Brookfield Asset Management COM | $576K | 13.0K | 0.0% | ▲+1.3% Added · +168 sh | |
| 33 | Fairfax Finl Hldgs COM | $372K | 219 | 0.0% | ▲+65% Added · +86 sh | |
| 34 | Nvidia COM | $369K | 2.1K | 0.0% | —Held | |
| 35 | Fastenal COM | $367K | 7.9K | 0.0% | —Held | |
| 36 | FedEx COM | $354K | 993 | 0.0% | ▼−56% Reduced · −1K sh | |
| 37 | Wells Fargo COM | $351K | 4.4K | 0.0% | ▼−12% Reduced · −625 sh | |
| 38 | Uber COM | $350K | 4.9K | 0.0% | —Held | |
| 39 | Conocophillips COM | $334K | 2.5K | 0.0% | —Held | |
| 40 | UnitedHealth COM | $333K | 1.2K | 0.0% | ▲+71% Added · +513 sh | |
| 41 | Biglari Holdings COM | $319K | 967 | 0.0% | ▼−28% Reduced · −373 sh | |
| 42 | Boeing Co COM | $288K | 1.4K | 0.0% | ▲+16% Added · +200 sh | |
| 43 | Illinois Tool Works COM | $286K | 1.1K | 0.0% | —Held | |
| 44 | Schwab US Large Cap Growth COM | $285K | 9.8K | 0.0% | —Held | |
| 45 | JPMorgan Chase COM | $281K | 956 | 0.0% | ▲+0.1% Added · +1 sh | |
| 46 | Chevron COM | $279K | 1.4K | 0.0% | —Held | |
| 47 | Quest Diagnostics COM | $255K | 1.3K | 0.0% | —Held | |
| 48 | Verizon COM | $241K | 4.8K | 0.0% | ▼−18% Reduced · −1K sh | |
| 49 | Citizens Financial Group COM | $228K | 3.8K | 0.0% | —Held |
Put / call positions from the 13F — totals include every disclosed option leg
| Type | Underlying | Notional value | Underlying shares |
|---|---|---|---|
| CALL · bullish | BERKSHIRE HATHAWAY INC-CL BBRK/B | $1.8B | 3.8M |
13F filers disclose option positions at the market value of the underlying the contracts reference, not the premium paid. A put is a bearish bet (it gains if the stock falls); a call is bullish. “Underlying shares” is the share count the contracts control, not a share holding. These legs are excluded from the equity book, weighting, concentration and sector figures above.
As-of date vs the date the SEC received each filing
| Quarter | As of | Filed | Positions | Value | Form |
|---|---|---|---|---|---|
| Q1 2026 | Mar 31, 2026 | May 4, 2026 | 66 | $3.4B | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Feb 6, 2026 | 75 | $3.4B | 13F-HR |
| Q3 2025 | Sep 30, 2025 | Nov 6, 2025 | 70 | $3.0B | 13F-HR |
| Q2 2025 | Jun 30, 2025 | Jul 25, 2025 | 67 | $3.0B | 13F-HR |
| Q1 2025 | Mar 31, 2025 | May 2, 2025 | 69 | $3.4B | 13F-HR |
| Q4 2024 | Dec 31, 2024 | Jan 30, 2025 | 77 | $3.4B | 13F-HR |
| Q3 2024 | Sep 30, 2024 | Nov 6, 2024 | 72 | $3.2B | 13F-HR |
| Q2 2024 | Jun 30, 2024 | Jul 25, 2024 | 68 | $3.0B | 13F-HR |
| Q1 2024 | Mar 31, 2024 | Apr 19, 2024 | 66 | $3.0B | 13F-HR |
| Q4 2023 | Dec 31, 2023 | Jan 31, 2024 | 70 | $2.7B | 13F-HR |
| Q3 2023 | Sep 30, 2023 | Jan 31, 2024 | 68 | $2.6B | 13F-HR/A |
| Q2 2023 | Jun 30, 2023 | Jan 31, 2024 | 58 | $2.5B | 13F-HR/A |
| Q1 2023 | Mar 31, 2023 | Jan 31, 2024 | 60 | $2.2B | 13F-HR/A |
| Q4 2022 | Dec 31, 2022 | Jan 31, 2024 | 68 | $2.1B | 13F-HR/A |
| Q3 2022 | Sep 30, 2022 | Nov 2, 2022 | 67 | $1.9B | 13F-HR |
| Q2 2022 | Jun 30, 2022 | Jul 28, 2022 | 66 | $2.0B | 13F-HR |
| Q1 2022 | Mar 31, 2022 | May 9, 2022 | 66 | $2.6B | 13F-HR |
| Q4 2021 | Dec 31, 2021 | Feb 4, 2022 | 73 | $2.4B | 13F-HR |
| Q3 2021 | Sep 30, 2021 | Nov 9, 2021 | 74 | $2.2B | 13F-HR |
| Q2 2021 | Jun 30, 2021 | Aug 9, 2021 | 76 | $2.2B | 13F-HR |
Holdings from SEC EDGAR 13F-HR filings, updated quarterly ~45 days after quarter-end. Public domain. The book and weighting are long equity only; disclosed put/call options are listed separately and excluded from those totals. The performance line is a simulation of the disclosed long book, not an audited return.