CIK 1120048
Long positions in SEC Section 13(f) securities (US-listed stocks, ADRs and ETFs), largest first · Δ vs 2025-Q4. A lagged quarterly snapshot (filed ≤45 days after quarter-end); excludes shorts, options, cash, and shares listed only on non-US exchanges — foreign companies held via a US listing or ADR (e.g. Alibaba, TSMC) ARE included.
As filed = each book applied at its quarter-end (what the reported book did) · As copyable = applied at its statutory 45-day filing deadline (what a 13F follower could have earned).
Computing…
Hypothetical modeled performance constructed with hindsight — not actual results, and not indicative of future results. See the Disclaimer.
| Industry group | Weight | Names |
|---|---|---|
| Specialty Retail | 34.87% | 2 |
| Software & IT Services | 33.06% | 2 |
| Insurance | 13.56% | 1 |
| Construction Materials | 12.49% | 1 |
| Unclassified | 6.03% | 2 |
| # | Ticker | Name | Sector | Weight |
|---|---|---|---|---|
| 1 | GOOG | Alphabet Inc. | Communication Services | 32.43% |
| 2 | COST | COSTCO WHOLESALE CORP /NEW | Consumer Discretionary | 22.30% |
| 3 | MKL | MARKEL GROUP INC. | Financials | 13.56% |
| 4 | FAST | FASTENAL CO | Consumer Discretionary | 12.57% |
| 5 | MLM | MARTIN MARIETTA MATERIALS INC | Materials | 12.49% |
| 6 | BRK.B | BERKSHIRE HATHAWAY INC | Financials | 5.91% |
| 7 | GOOGL | Alphabet Inc. | Communication Services | 0.62% |
| 8 | BRK.A | BERKSHIRE HATHAWAY INC DEL | Unclassified | 0.12% |
7/8 names classified · sector 99.9% of weight · industry 94.0% · mkt cap 99.9%; unclassified names shown, never dropped.
Sector is classified on each name's CURRENT fundamentals, not point-in-time — apparent sector drift can reflect the market re-rating a holding, not a manager trade. 13F is a lagged quarterly snapshot of long positions in US-listed securities only — foreign companies held via a US listing or ADR ARE included, but shares listed only on non-US exchanges (plus shorts, options and cash) are not. Latest quarter: 99.9% of the book is sector-classified (unclassified names shown, never dropped).
Classified: 94.0% of book weight (6/8 names) · unclassified 6.0%: BRK.B, BRK.A. Size: cap 70/20/10 bands; style: value/growth composite on our own metrics — not Morningstar's model.
No contribution data for this period.
| # | Security | Shares | Value | Weight | Δ QoQ |
|---|---|---|---|---|---|
| 1 | GOOGALPHABET INC | 684,142 | $196M | 32.4% | HOLD |
| 2 | COSTCOSTCO WHSL CORP NEW | 135,431 | $135M | 22.3% | ADD 2% |
| 3 | MKLMARKEL GROUP INC | 42,864 | $82M | 13.6% | ADD 5% |
| 4 | FASTFASTENAL CO | 1,638,760 | $76M | 12.6% | ADD 3% |
| 5 | MLMMARTIN MARIETTA MATLS INC | 128,350 | $76M | 12.5% | ADD 7% |
| 6 | BRK.BBERKSHIRE HATHAWAY INC DEL | 74,602 | $36M | 5.9% | ADD 6% |
| 7 | GOOGLALPHABET INC | 13,091 | $4M | 0.6% | HOLD |
| 8 | BRK.ABERKSHIRE HATHAWAY INC DEL | 1 | $718,000 | 0.1% | TRIM −67% |
| Security | 2024-Q4 | 2025-Q1 | 2025-Q2 | 2025-Q3 | 2025-Q4 | 2026-Q1 | Latest value |
|---|---|---|---|---|---|---|---|
| GOOGALPHABET INC | 653K | 631K | 674K | 681K | 672K | 684K | $196M |
| COSTCOSTCO WHSL CORP NEW | 143K | 137K | 130K | 125K | 132K | 135K | $135M |
| MKLMARKEL GROUP INC | 40K | 39K | 40K | 40K | 41K | 43K | $82M |
| FASTFASTENAL CO | 732K | 727K | 1.5M | 1.4M | 1.6M | 1.6M | $76M |
| MLMMARTIN MARIETTA MATLS INC | 112K | 114K | 119K | 120K | 120K | 128K | $76M |
| BRK.BBERKSHIRE HATHAWAY INC DEL | 64K | 62K | 64K | 69K | 71K | 75K | $36M |
| GOOGLALPHABET INC | 13K | 13K | 13K | 13K | 13K | 13K | $4M |
| BRK/ABERKSHIRE HATHAWAY INC DEL | — | — | 3 | 3 | 3 | 1 | $718,000 |
Shares reported each quarter by the largest current holdings. Green = added vs the prior filing of that name, red = trimmed, grey = roughly held; a dash is a quarter with no 13F on file (a gap is skipped, not read as an exit). 13F is filed up to 45 days after quarter-end. Up to 40 quarters (10 years) available — use the selector above.
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