Steginsky Capital LLC
In its 13F for Q3 2025 (holdings as of September 30, 2025, filed November 13, 2025), Steginsky Capital LLC reported 8 stock positions worth $544.6 million. Its top holding was Alphabet Class C (GOOG) at 30.4% of the portfolio, followed by Costco Wholesale (COST, 21.3%) and Markel (MKL, 14.1%). Compared with Q2 2025, it added to 4 and reduced 2. The biggest buy was Alphabet Class C (GOOG, shares +1%) and the biggest sale Costco Wholesale (COST, shares −4%).
- Most Recent 13F
- Q2 2026
- Location
- PORT WASHINGTON, NY
- CIK
- 0001120048
- Portfolio Value
- $544.6M (Q3 2025)
- SEC Filing
- 0001120048-25-000005 ↗ filed Nov 13, 2025
Holdings Value
Holdings 8 stocks · $544.6M
| GOOG Alphabet Inc. Class C | 30.43% | 680,588 | $165.8M | Add +1.0% |
| COST Costco Wholesale Corp. | 21.29% | 125,253 | $115.9M | Reduce -3.7% |
| MKL Markel Group Inc. | 14.07% | 40,090 | $76.6M | Add +1.3% |
| MLM Martin Marietta Materials | 13.85% | 119,653 | $75.4M | Add +0.8% |
| FAST Fastenal Co. | 12.97% | 1,440,322 | $70.6M | Reduce -1.0% |
| BRK.B Berkshire Hathaway Inc. Class B | 6.39% | 69,266 | $34.8M | Add +8.7% |
| GOOGL Alphabet Inc. Class A | 0.58% | 13,071 | $3.2M | No change |
| BRK.A Berkshire Hathaway Inc. Class A | 0.42% | 3 | $2.3M | No change |
Portfolio Sells Q2 2025 → Q3 2025
Portfolio Buys Q2 2025 → Q3 2025
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 |