Steginsky Capital LLC
In its 13F for Q2 2025 (holdings as of June 30, 2025, filed August 12, 2025), Steginsky Capital LLC reported 8 stock positions worth $489.1 million. Its top holding was Costco Wholesale (COST) at 26.3% of the portfolio, followed by Alphabet Class C (GOOG, 24.4%) and Markel (MKL, 16.2%). Compared with Q1 2025, it opened 1 new position, added to 5 and reduced 1. The biggest buy was Alphabet Class C (GOOG, shares +7%) and the biggest sale Costco Wholesale (COST, shares −5%).
- Most Recent 13F
- Q2 2026
- Location
- PORT WASHINGTON, NY
- CIK
- 0001120048
- Portfolio Value
- $489.1M (Q2 2025)
- SEC Filing
- 0001120048-25-000003 ↗ filed Aug 12, 2025
Holdings Value
Holdings 8 stocks · $489.1M
| COST Costco Wholesale Corp. | 26.32% | 130,055 | $128.7M | Reduce -5.1% |
| GOOG Alphabet Inc. Class C | 24.45% | 674,065 | $119.6M | Add +6.8% |
| MKL Markel Group Inc. | 16.16% | 39,561 | $79.0M | Add +1.2% |
| MLM Martin Marietta Materials | 13.33% | 118,762 | $65.2M | Add +4.2% |
| FAST Fastenal Co. | 12.50% | 1,455,043 | $61.1M | Add +0.1% |
| BRK.B Berkshire Hathaway Inc. Class B | 6.33% | 63,698 | $30.9M | Add +3.1% |
| GOOGL Alphabet Inc. Class A | 0.47% | 13,071 | $2.3M | No change |
| BRK.A Berkshire Hathaway Inc. Class A | 0.45% | 3 | $2.2M | New |
Portfolio Sells Q1 2025 → Q2 2025
| COST Costco Wholesale Corp. | Reduce -5.1% | 26.32% | −2.67 |
Portfolio Buys Q1 2025 → Q2 2025
| GOOG Alphabet Inc. Class C | Add +6.8% | 24.45% | +2.39 |
| MLM Martin Marietta Materials | Add +4.2% | 13.33% | +1.14 |
| BRK.A Berkshire Hathaway Inc. Class A | New | 0.45% | +0.45 |
| FAST Fastenal Co. | Add +0.1% | 12.50% | −0.10 |
| MKL Markel Group Inc. | Add +1.2% | 16.16% | −0.19 |
| BRK.B Berkshire Hathaway Inc. Class B | Add +3.1% | 6.33% | −1.03 |
All Filings
| Quarter | Positions | 13F Reported Value | Top Holdings |
|---|---|---|---|
| Q2 2026 | 8 | $666.3M | GOOG, COST, MKL, FAST, MLM |
| Q1 2026 | 8 | $605.1M | GOOG, COST, MKL, FAST, MLM |
| Q4 2025 | 8 | $593.4M | GOOG, COST, MKL, MLM, FAST |
| Q3 2025 | 8 | $544.6M | GOOG, COST, MKL, MLM, FAST |
| Q2 2025 | 8 | $489.1M | COST, GOOG, MKL, MLM, FAST |
| Q1 2025 | 7 | $447.2M | COST, GOOG, MKL, FAST, MLM |
| Q4 2024 | 7 | $466.9M | COST, GOOG, MKL, MLM, FAST |
| Q3 2024 | 7 | $440.6M | COST, GOOG, MKL, MLM, FAST |
| Q2 2024 | 7 | $435.3M | COST, GOOG, MKL, MLM, FAST |
| Q1 2024 | 7 | $415.3M | COST, GOOG, MLM, MKL, FAST |