CIK 873687
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 |
|---|---|---|
| Unclassified | 92.11% | 1 |
| Insurance | 7.81% | 1 |
| Pharmaceuticals & Biotechnology | 0.09% | 1 |
| # | Ticker | Name | Sector | Weight |
|---|---|---|---|---|
| 1 | BRK.A | BERKSHIRE HATHAWAY INC DEL | Unclassified | 92.11% |
| 2 | RYAN | RYAN SPECIALTY HOLDINGS, INC. | Financials | 7.81% |
| 3 | XCUR | EXICURE, INC. | Health Care | 0.09% |
2/3 names classified · sector 7.9% of weight · industry 7.9% · mkt cap 7.9%; 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: 7.9% of the book is sector-classified (unclassified names shown, never dropped).
Only 8% of book weight classified — the grid is NOT representative of the whole book.
Classified: 7.8% of book weight (1/3 names) · unclassified 92.2%: BRK.A, XCUR. 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 | 2024-Q4 | 2025-Q1 | 2025-Q2 | 2025-Q3 | 2025-Q4 | 2026-Q1 | Latest value |
|---|---|---|---|---|---|---|---|
| BRK/ABERKSHIRE HATHAWAY INC DEL | 79 | 66 | 66 | 66 | 455 | 66 | $47M |
| RYANRYAN SPECIALTY HOLDINGS INC | 119K | 119K | 119K | 119K | — | 119K | $4M |
| XCUREXICURE INC | 10K | 10K | 10K | 10K | — | 10K | $44,380 |
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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