Reported positions
Quarter-end holdings as filed
Explore the full published position list and its source filing. This record excludes the manager’s cash, shorts and non-13(f) assets.
CHECK CAPITAL MANAGEMENT INC/CA
- sum of disclosed values for 2026-03-31; 0 positions carry a NULL value and are excluded from the sum, surfaced here rather than folded away
- $3.4B
- ALL retained default holdings for this (filer, period), including NULL-value ones
- 66
- positions with no comparable holding in the prior quarter (kind new), 2026-03-31
- 0
- positions absent from this quarter's filing after being held last quarter (kind exit), 2026-03-31 — inferred from absence, not a sale record
- 1
A quarter-end snapshot. Filed up to 45 days later, so this page is not current holdings and never a complete portfolio. what a 13F is — and is not ↓ methodology §13F ↗
Position changes — into 2026-03-31
by shares · Δ value · filing link · how changes are classified §Period
position matched across quarters by exact reported CUSIP over a registry gap — producer-reconciled identity, never a name match identity_reconciled_by_cusip | the reported share count is unchanged across the pair; this build's data classified the change from its reported value; builds from 2026-09-10 on read it as NO CHANGE classified_by_value · EXIT = absent this quarter: disposed, delisted, under confidential treatment, or reported instead by an affiliated manager — the filing does not say which · change not classifiable: value undisclosed on one side of the quarter pair, or neither shares nor value can classify it · NO CHANGE = the share count is identical in both quarters; the value moved only with price, so the row is mark-to-market and never an ADD or a TRIM (NEW / ADD / TRIM / EXIT / NO CHANGE) · NO PRIOR = this filer has no comparable holdings list for the previous quarter on record — a first filing under this registration, or a quarter reported inside an affiliated manager's filing — so the position is not called a new stake | derived by Public Filings from the published aggregate; NULL means the source did not disclose a usable value — never zero | Prev value | Curr value | Prev shares | Curr shares | |
|---|---|---|---|---|---|---|---|
position key pos:11205 · issuer key iss:255 COM CALL | ADD | +$49.8M | +275,700 | $1.8B | $1.8B | 3,510,000 | 3,785,700 |
position key pos:11205 · issuer key iss:255 COM | ADD | −$23.0M | +5,882 | $554M | $531M | 1,102,508 | 1,108,390 |
position key cusip:38259P706 · issuer key cusip6:38259P COM | TRIM | −$22.7M | −13,214 | $221M | $198M | 703,613 | 690,399 |
position key pos:14637 · issuer key iss:326 COM | TRIM | −$24.2M | −9,030 | $201M | $177M | 4,388,968 | 4,379,938 |
position key pos:11906 · issuer key iss:1183 COM | TRIM | −$19.0M | −427 | $166M | $147M | 77,313 | 76,886 |
position key pos:10798 · issuer key iss:2283 COM | TRIM | −$6.8M | −9,707 | $119M | $112M | 827,362 | 817,655 |
position key pos:11287 · issuer key iss:738 COM | ADD | −$8.8M | +1,280 | $91.8M | $83.1M | 42,788 | 44,068 |
position key pos:13334 · issuer key iss:1669 COM | ADD | +$10.3M | +59,095 | $57.7M | $67.9M | 2,883,500 | 2,942,595 |
position key pos:16976 · issuer key iss:1084 COM | ADD | +$9.2M | +358,625 | $47.1M | $56.3M | 1,558,481 | 1,917,106 |
position key pos:14175 · issuer key iss:95 COM | ADD | +$41.7M | +200,606 | $804K | $42.5M | 3,481 | 204,087 |
position key pos:17095 · issuer key iss:588 COM | ADD | −$7.4M | +1,892 | $49.7M | $42.3M | 436,641 | 438,533 |
position key pos:15485 · issuer key iss:903 COM | ADD | +$5.3M | +1,621 | $34.7M | $40.0M | 190,689 | 192,310 |
position key cusip:045290255 · issuer key cusip6:045290 COM | ADD | +$7.3M | +64,860 | $27.1M | $34.4M | 406,606 | 471,466 |
position key pos:11840 · issuer key iss:1031 COM | ADD | +$30.0K | +227,684 | $28.0M | $28.1M | 452,487 | 680,171 |
position key pos:18082 · issuer key iss:1950 COM | ADD | −$4.2M | +756 | $16.8M | $12.6M | 167,192 | 167,948 |
position key pos:13215 · issuer key iss:144 COM | TRIM | −$1.0M | −2,322 | $6.9M | $5.9M | 25,395 | 23,073 |
position key sid:sec:prov:4eb85b6f210e45ddc13715b1cba8f8d0 · issuer key cusip6:08986R COM | TRIM | −$1.1M | −622 | $3.8M | $2.7M | 2,200 | 1,578 |
position key pos:11825 · issuer key iss:1225 COM | TRIM | −$712K | −47 | $3.0M | $2.3M | 6,126 | 6,079 |
position key cusip:38259P508 · issuer key cusip6:38259P COM | ADD | −$74.9K | +60 | $1.1M | $1.1M | 3,623 | 3,683 |
position key pos:16149 · issuer key iss:1829 COM | TRIM | −$482K | −85 | $1.5M | $1.0M | 40,780 | 40,695 |
position key pos:3567 · issuer key iss:810 COM | TRIM | −$150K | −250 | $998K | $848K | 3,240 | 2,990 |
position key pos:17386 · issuer key iss:806 COM | TRIM | +$141K | −87 | $646K | $786K | 988 | 901 |
position key pos:13234 · issuer key iss:230 COM | TRIM | −$3.8M | −67,705 | $4.4M | $587K | 79,737 | 12,032 |
position key pos:10732 · issuer key iss:329 COM | ADD | −$94.1K | +168 | $670K | $576K | 12,786 | 12,954 |
position key cusip:303901102 · issuer key cusip6:303901 COM | ADD | +$118K | +86 | $254K | $372K | 133 | 219 |
position key pos:17674 · issuer key iss:728 COM | TRIM | −$292K | −1,244 | $646K | $354K | 2,237 | 993 |
position key pos:11688 · issuer key iss:1955 COM | TRIM | −$118K | −625 | $470K | $351K | 5,038 | 4,413 |
position key pos:16115 · issuer key iss:1869 COM | ADD | +$96.0K | +513 | $237K | $333K | 719 | 1,232 |
position key cusip:08986R101 · issuer key cusip6:08986R COM | TRIM | −$127K | −373 | $445K | $319K | 1,340 | 967 |
position key pos:17214 · issuer key iss:298 COM | ADD | +$17.3K | +200 | $270K | $288K | 1,245 | 1,445 |
position key pos:18039 · issuer key iss:1025 COM | ADD | −$26.5K | +1 | $308K | $281K | 955 | 956 |
position key pos:10935 · issuer key iss:1902 COM | TRIM | +$2.3K | −1,060 | $239K | $241K | 5,860 | 4,800 |
| pos:11390 | EXIT‡e | −$222K | −336 | $222K | $0 | 336 | — |
Flags: no row carries a flag.
1–20 of the 33 changes on this page
Mark-to-market only (no share change) · 18
Positions whose share count is identical in both quarters; the value changed with price, not with a decision.
position matched across quarters by exact reported CUSIP over a registry gap — producer-reconciled identity, never a name match identity_reconciled_by_cusip | the reported share count is unchanged across the pair; this build's data classified the change from its reported value; builds from 2026-09-10 on read it as NO CHANGE classified_by_value · EXIT = absent this quarter: disposed, delisted, under confidential treatment, or reported instead by an affiliated manager — the filing does not say which · change not classifiable: value undisclosed on one side of the quarter pair, or neither shares nor value can classify it · NO CHANGE = the share count is identical in both quarters; the value moved only with price, so the row is mark-to-market and never an ADD or a TRIM (NEW / ADD / TRIM / EXIT / NO CHANGE) · NO PRIOR = this filer has no comparable holdings list for the previous quarter on record — a first filing under this registration, or a quarter reported inside an affiliated manager's filing — so the position is not called a new stake | derived by Public Filings from the published aggregate; NULL means the source did not disclose a usable value — never zero | Prev value | Curr value | Prev shares | Curr shares | |
|---|---|---|---|---|---|---|---|
position key pos:11020 · issuer key iss:255 COM | NO CHANGE | −$1.1M | 0 | $21.9M | $20.8M | 29 | 29 |
position key pos:11671 · issuer key iss:122 COM | NO CHANGE | +$95.3K | 0 | $1.3M | $1.4M | 3,885 | 3,885 |
position key pos:13432 · issuer key iss:411 COM | NO CHANGE | +$233K | 0 | $984K | $1.2M | 1,717 | 1,717 |
position key pos:11938 · issuer key iss:834 COM | NO CHANGE | −$40.6K | 0 | $1.1M | $1.0M | 1,230 | 1,230 |
position key pos:10357 · issuer key iss:1786 COM | NO CHANGE | −$195K | 0 | $1.1M | $929K | 2,500 | 2,500 |
position key pos:16439 · issuer key iss:520 COM | NO CHANGE | +$244K | 0 | $442K | $687K | 5,050 | 5,050 |
position key pos:15626 · issuer key iss:1529 COM | NO CHANGE | +$33.1K | 0 | $640K | $673K | 3,489 | 3,489 |
position key pos:11570 · issuer key iss:1599 ETF | NO CHANGE | −$30.5K | 0 | $658K | $628K | 965 | 965 |
position key sid:sec:prov:d06dc90372e535936c4f30ff3a1ea498 · issuer key cusip6:46434V ETF | NO CHANGE | −$14.0K | 0 | $614K | $600K | 8,800 | 8,800 |
position key pos:15642 · issuer key iss:1334 COM | NO CHANGE | −$25.6K | 0 | $395K | $369K | 2,117 | 2,117 |
position key pos:15311 · issuer key iss:724 COM | NO CHANGE | +$49.7K | 0 | $318K | $367K | 7,920 | 7,920 |
position key pos:12696 · issuer key iss:1845 COM | NO CHANGE | −$47.5K | 0 | $397K | $350K | 4,860 | 4,860 |
position key pos:15035 · issuer key iss:505 COM | NO CHANGE | +$97.3K | 0 | $237K | $334K | 2,534 | 2,534 |
position key pos:15592 · issuer key iss:954 COM | NO CHANGE | +$15.4K | 0 | $271K | $286K | 1,100 | 1,100 |
position key pos:17143 · issuer key iss:1633 COM | NO CHANGE | −$34.2K | 0 | $320K | $285K | 9,800 | 9,800 |
position key pos:11717 · issuer key iss:440 COM | NO CHANGE | +$73.6K | 0 | $206K | $279K | 1,350 | 1,350 |
position key pos:12433 · issuer key iss:1513 COM | NO CHANGE | +$29.2K | 0 | $226K | $255K | 1,300 | 1,300 |
position key pos:10276 · issuer key iss:458 COM | NO CHANGE | +$5.9K | 0 | $222K | $228K | 3,800 | 3,800 |
Flags: no row carries a flag.
Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt.
Changes compare every position with a security identifier, new and exited included; holdings without one are counted, not compared. methodology §13F ↗
Reported positions — 2026-03-31
1–46 of 46 issuers · $3.4B disclosed value over 66 rows · 0 undisclosed-value rowsViewThis build carries one quarter for this manager: 2026-03-31. Notable managers carry four published quarters, others two.
| This list carries reported issuer names and security identities, without a dated ticker mapping. Symbols are not inferred from names. | a position composed from a base filing plus NEW-HOLDINGS amendments keeps every source row here; the composition's latest filed date is the one shown served from this build's published holdings (derived from the filer's own reported rows); every row resolves to its filing | Share of total reported value, calculated only when the full position list has disclosed values. This is 13F long value, not total assets. | value undisclosed on the filing: retained and counted, excluded from sums, never shown as $0 | Shares | Wt | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| — | Berkshire Hathaway3 positions · 19 reported rows
| $2.4B | 4,894,119 | 68.9% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | Alphabet2 positions · 2 reported rows
| $199M | 694,082 | 5.8% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | Brookfield Corp. · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d ticker not yet mapped | $177M | 4,379,938 | 5.2% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | Markel · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d ticker not yet mapped | $147M | 76,886 | 4.3% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | AerCap Holdings · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d ticker not yet mapped | $112M | 817,655 | 3.3% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | First Citizens · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d ticker not yet mapped | $83.1M | 44,068 | 2.4% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | Sirius XM · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d ticker not yet mapped | $67.9M | 2,942,595 | 2.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | LKQ Corp · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d | $56.3M | 1,917,106 | 1.6% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | Amazon · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d ticker not yet mapped | $42.5M | 204,087 | 1.2% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | Disney (Walt) · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d | $42.3M | 438,533 | 1.2% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | Hershey Foods · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d ticker not yet mapped | $40.0M | 192,310 | 1.2% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | Cimpress · COM CUSIP 045290255 quarter ended 2026-03-31 filed filed 2026-05-04 +34d ticker not yet mapped | $34.4M | 471,466 | 1.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | Jefferies · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d ticker not yet mapped | $28.1M | 680,171 | 0.8% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | Wayfair · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d ticker not yet mapped | $12.6M | 167,948 | 0.4% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | Apple · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d | $5.9M | 23,073 | 0.2% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | Biglari Cl A2 positions · 2 reported rows
| $3.1M | 2,545 | 0.1% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | Microsoft · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d | $2.3M | 6,079 | 0.1% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | Amgen · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d | $1.4M | 3,885 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | Caterpillar Tractor · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d ticker not yet mapped | $1.2M | 1,717 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | Trupanion Inc. · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d | $1.0M | 40,695 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | Goldman Sachs · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d ticker not yet mapped | $1.0M | 1,230 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | Tesla Motors · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d ticker not yet mapped | $929K | 2,500 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | General Electric · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d | $848K | 2,990 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | GE Vernova · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d | $786K | 901 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | Corning · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d | $687K | 5,050 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | Raytheon Technologies · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d ticker not yet mapped | $673K | 3,489 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | SPDR S&P 500 · ETF CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d ticker not yet mapped | $628K | 965 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | IShares Exponential Technologi · ETF CUSIP 46434V381 quarter ended 2026-03-31 filed filed 2026-05-04 +34d ticker not yet mapped | $600K | 8,800 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | Bank of America · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d | $587K | 12,032 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | Brookfield Asset Management · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d ticker not yet mapped | $576K | 12,954 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | Fairfax Finl Hldgs · COM CUSIP 303901102 quarter ended 2026-03-31 filed filed 2026-05-04 +34d ticker not yet mapped | $372K | 219 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | Nvidia · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d | $369K | 2,117 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | Fastenal · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d | $367K | 7,920 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | FedEx · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d | $354K | 993 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | Wells Fargo · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d | $351K | 4,413 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | Uber · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d ticker not yet mapped | $350K | 4,860 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | Conocophillips · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d | $334K | 2,534 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | UnitedHealth · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d ticker not yet mapped | $333K | 1,232 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | Boeing Co · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d | $288K | 1,445 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | Illinois Tool Works · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d | $286K | 1,100 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | Schwab US Large Cap Growth · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d ticker not yet mapped | $285K | 9,800 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | JPMorgan Chase · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d | $281K | 956 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | Chevron · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d | $279K | 1,350 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| verified against the SEC company list on 2026-09-10 — a reviewed mapping row for this filed issuer name and class (never inferred) | Quest Diagnostics · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d | $255K | 1,300 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | Verizon · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d ticker not yet mapped | $241K | 4,800 | 0.0% | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| — | Citizens Financial Group · COM CUSIP — quarter ended 2026-03-31 filed filed 2026-05-04 +34d ticker not yet mapped | $228K | 3,800 | 0.0% |
1–20 of 46 issuers
Change kind and share change are in Position changes above; Congress overlap is planned.
1–46 of 46 issuers · page 1 of 1
One line per issuer, largest first; a row with no issuer key stands on its own line. Open a line for its rows as this filer reported them. The list holds every row this filer reported for the quarter. Issuer totals on the holders pages count each manager's own report once; that never removes a row here. how positions are grouped ↗
Book shape
2026-03-31 · concentration · vs tracked median · tick = median- Top-25 concentration
- 99.7%above median 80.0%
- Concentration index
- 3,134 bpsabove median 446 bps
- Positions with value
- 66 / 66median book 97.5 positions
Concentration uses reported 13F long value, not total assets. The index is withheld when any position lacks a value. Medians are over the 8,748 tracked filers with a 2026-03-31 book; the index median over the 8,662 with a complete book.
holdings whose <value> did not parse — retained and counted, never zero-filled: 0 · : 99.7% · integer Herfindahl–Hirschman index in basis points over disclosed position values: 3,134 · QoQ moves: 51
Filing history
AVAILABLE QUARTERS| Period | Source |
|---|---|
| 2026-03-31 | EDGAR ↗ |
PLANNED sector rotation · Congress overlap · signals for this filer
Complete source filings on SEC EDGAR
The complete filing on EDGAR.
The position list above is served from the published Public Filings build, each position as this filer reported it; where the page cannot embed every reported row, the list says how many it leaves out. This block is provenance, not a substitute: the filing itself is the record, and it is one click away. Public Filings decided on 2026-08-01 to serve this list from its published build; filings newer than this build are on EDGAR.
Open CHECK CAPITAL MANAGEMENT INC/CA's 13F filings on SEC EDGAR ↗Notes on this data
Share changes
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Position changes retain the producer’s classification and comparability flags. Share counts and reported values describe different changes.
Coverage
A snapshot, not current holdings
Use the quarter selector to inspect available periods. Unknown values stay unknown and each table states its coverage.
A 13F is a quarterly, long-only snapshot filed up to 45 days late — not current holdings. what a 13F covers ↗
13F reports cover LONG positions in Section 13(f) securities (US exchange-traded equities plus reportable options, warrants, certain convertibles) held by managers with at least $100M in such securities — so managers below that threshold are absent entirely. No short positions, no cash, no non-13(f) assets — not a full portfolio, and not a census of institutional ownership.
Positions are quarter-end snapshots filed up to 45 days late — not current holdings. A position may have been changed or closed before you ever see it, and is older still by however long ago that quarter ended.
Values are the manager's stated market value at quarter-end in era-dependent units (whole dollars for form versions effective 2023-01-03 onward, thousands before), normalized here to whole dollars with unit_basis carried on every record.
Affiliated managers may report the same position (otherManager), so one position can appear under more than one filer.
Positions under confidential treatment may be omitted until a later amendment discloses them.
These are disclosures, not investment advice (ARCHITECTURE.md §5.2 / M2-CONTRACT §5).