Institutional Manager · CIK 0001120048
STEGINSKY CAPITAL LLC
PORT WASHINGTON, NY · File #028-05811
Latest AUM
$593,435
Positions
8
Top-10 Concentration
100.0%
Filings
9
Portfolio Value Over Time
2024-03
2024-06
2024-09
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| ADD | FASTENAL CO | FAST | +154,765 | +$6,211 | -$12,833 |
| ADD | COSTCO WHOLESALE CORP | 22160K105 | +6,942 | +$5,986 | -$7,927 |
| REDUCE | ALPHABET INC CAP STKCL C | GOOG | -8,176 | -$2,566 | +$47,812 |
| ADD | MARKEL CORP | MKL | +900 | +$1,935 | +$9,553 |
| ADD | BERKSHIRE HATHAWAY INC DEL CL B NEW | BRK-A | +1,286 | +$646 | -$6 |
| REDUCE | MARTIN MARIETTA MATLS INC | 573284106 | -18 | -$11 | -$912 |
| REDUCE | ALPHABET INC CL A | GOOG | 0 | $0 | +$913 |
| REDUCE | BERKSHIRE HATHAWAY INC CL A | BRK-A | 0 | $0 | +$1 |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 20258 pos · $593,435
- 13F HOLDINGS REPORTQ/E Sep 20258 pos · $544,633
- 13F HOLDINGS REPORTQ/E Jun 20258 pos · $489,078
- 13F HOLDINGS REPORTQ/E Mar 20257 pos · $447,178
- 13F HOLDINGS REPORTQ/E Dec 20247 pos · $466,936
- 13F HOLDINGS REPORTQ/E Sep 20247 pos · $440,602
- 13F HOLDINGS REPORTQ/E Jun 20247 pos · $435,301
- 13F HOLDINGS REPORTQ/E Mar 20247 pos · $415,334
- 13F HOLDINGS REPORTQ/E Dec 20237 pos · $325,373
Top 8 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | ALPHABET INC CAP STKCL C | GOOG | 672,412 | $211,003 | 35.56% |
| 2 | COSTCO WHOLESALE CORP | 22160K105 | 132,195 | $113,997 | 19.21% |
| 3 | MARKEL CORP | MKL | 40,990 | $88,114 | 14.85% |
| 4 | MARTIN MARIETTA MATLS INC | 573284106 | 119,635 | $74,492 | 12.55% |
| 5 | FASTENAL CO | FAST | 1,595,087 | $64,011 | 10.79% |
| 6 | BERKSHIRE HATHAWAY INC DEL CL B NEW | BRK-A | 70,552 | $35,463 | 5.98% |
| 7 | ALPHABET INC CL A | GOOG | 13,071 | $4,091 | 0.69% |
| 8 | BERKSHIRE HATHAWAY INC CL A | BRK-A | 3 | $2,264 | 0.38% |