SC
Steginsky Capital LLC
Momentum followerConcentrated strategyQuality / disciplined sizing
Total reported value
$666.3M
Reporting period: 2026-06-30 · Number of holdings: 8
STEGINSKY CAPITAL LLC disclosed 8 holdings in its latest 13F filing for the period ending 2026-06-30, with total reported value of $666.3M and a quarterly turnover rate of 12.3%.
Personality snowflake
- Concentration
- 88.15
- Portfolio Stability
- 12.27
- Momentum/Contrarian
- 100
- Sector conviction
- 75.59
- Diversification
- 16
- Sizing Uniformity
- 90.66
Recent moves
Add GOOG
+0.8% $47.3M
Trim COST
-0.1% -$8.4M
Trim MLM
+7.9% $4.3M
Add BRK-A
+300.0% $2.3M
Trim BRK-B
-0.2% $1.5M
Trim MKL
+5.9% $6.6M
Holdings Map
New buyAddUnchangedTrim
Top 10 holdings by weight
Full holdings list this quarter
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | GOOG | Alphabet Inc-cl C | Stock-Comm Services | 36.56% | +4.13% | +0.76% | |
| 2 | COST | Costco Wholesale CORP | Stock-Consumer Staples | 18.99% | -3.31% | -0.12% | |
| 3 | MKL | Markel Group INC | Stock-Financials | 13.31% | -0.25% | +5.93% | |
| 4 | FAST | Fastenal Co | Stock-Industrials | 12.39% | -0.18% | +4.91% | |
| 5 | MLM | Martin Marietta Materials | Stock-Materials | 11.99% | -0.50% | +7.95% | |
| 6 | BRK-B | Berkshire Hathaway Inc-cl B | Stock-Other | 5.59% | -0.32% | -0.23% | |
| 7 | GOOGL | Alphabet Inc-cl A | Stock-Comm Services | 0.71% | +0.09% | +1.80% | |
| 8 | BRK-A | Berkshire Hathaway Inc-cl A | Stock-Other | 0.45% | +0.33% | +300.00% |
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-06-30 | 8 | $666.3M | 12 | |
| 2026-03-31 | 8 | $605.1M | 10 | |
| 2025-12-31 | 8 | $593.4M | 12 | |
| 2025-09-30 | 8 | $544.6M | 24 | |
| 2025-06-30 | 8 | $489.1M | 0 | |
| 2025-03-31 | 7 | $447.2M | 100 | |
| 2024-12-31 | 7 | $466.9M | 0 | |
| 2024-09-30 | 7 | $440.6M | 0 | |
| 2024-06-30 | 7 | $435.3M | 0 | |
| 2024-03-31 | 7 | $415.3M | 0 | |
| 2023-12-31 | 7 | $363.0M | 0 | |
| 2023-09-30 | 7 | $325.4M | 0 | |
| 2023-06-30 | 7 | $320.1M | 0 | |
| 2023-03-31 | 7 | $280.2M | 0 | |
| 2022-12-31 | 7 | $270.8M | 0 | |
| 2022-09-30 | 7 | $263.3M | 0 | |
| 2022-06-30 | 7 | $279.9M | 0 | |
| 2022-03-31 | 7 | $305.2M | 0 | |
| 2021-12-31 | 7 | $305.2M | 0 | |
| 2021-09-30 | 8 | $266.2M | 0 | |
| 2021-06-30 | 8 | $249.8M | 100 | |
| 2021-03-31 | 8 | $215.1M | 11 | |
| 2020-12-31 | 8 | $200.4M | 12 | |
| 2020-09-30 | 8 | $176.9M | 12 | |
| 2020-06-30 | 8 | $159.6M | 11 | |
| 2020-03-31 | 8 | $143.4M | 19 | |
| 2019-12-31 | 8 | $173.1M | 7 | |
| 2019-09-30 | 8 | $162.4M | 10 | |
| 2019-06-30 | 8 | $153.0M | 9 | |
| 2019-03-31 | 8 | $140.5M | 10 | |
| 2018-12-31 | 8 | $127.2M | 17 | |
| 2018-09-30 | 10 | $110.0M | 19 | |
| 2018-06-30 | 8 | $111.2M | 15 | |
| 2018-03-31 | 8 | $111.1M | 5 | |
| 2017-12-31 | 8 | $106.8M | 8 | |
| 2017-09-30 | 10 | $110.0M | 8 | |
| 2017-06-30 | 9 | $101.8M | 18 | |
| 2017-03-31 | 9 | $115.1M | 7 | |
| 2016-12-31 | 9 | $111.1M | — |
Holding changes this quarter
Steginsky Capital LLC's most significant position changes for 2026-06-30: Add: Alphabet Inc-cl C (GOOG) — shares +0.76%; Trim: Costco Wholesale CORP (COST) — shares -0.12%; Add: Martin Marietta Materials (MLM) — shares +7.95%; Add: Berkshire Hathaway Inc-cl A (BRK-A) — shares +300.00%; Trim: Berkshire Hathaway Inc-cl B (BRK-B) — shares -0.23%.
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | GOOG | Alphabet Inc-cl C | +4.1% | +0.76% | Add |
| 2 | BRK-A | Berkshire Hathaway Inc-cl A | +0.3% | +300.00% | Add |
| 3 | GOOGL | Alphabet Inc-cl A | +0.1% | +1.80% | Add |
| 4 | FAST | Fastenal Co | -0.2% | +4.91% | Add |
| 5 | MKL | Markel Group INC | -0.3% | +5.93% | Add |
| 6 | BRK-B | Berkshire Hathaway Inc-cl B | -0.3% | -0.23% | Trim |
| 7 | MLM | Martin Marietta Materials | -0.5% | +7.95% | Add |
| 8 | COST | Costco Wholesale CORP | -3.3% | -0.12% | Trim |
FAQ
What is Steginsky Capital LLC and what type of investor is it?
Steginsky Capital LLC is a investment manager that files SEC Form 13F quarterly, disclosing its U.S. public equity holdings to regulators. As of the most recent reporting period (2026-06-30), the firm manages a tracked equity portfolio valued at approximately $666.3M, spread across 8 disclosed positions.
What are Steginsky Capital LLC's largest equity positions?
Based on the latest 13F filing, Steginsky Capital LLC's top holdings by market value are:
1. Alphabet Inc-cl C (GOOG) — $243.6M (36.6%)
2. Costco Wholesale CORP (COST) — $126.5M (19.0%)
3. Markel Group INC (MKL) — $88.7M (13.3%)
4. Fastenal Co (FAST) — $82.6M (12.4%)
5. Martin Marietta Materials (MLM) — $79.9M (12.0%)
What changes did Steginsky Capital LLC make in its most recent portfolio filing?
In the latest reported quarter, Steginsky Capital LLC made 8 notable position adjustments: 0 new positions were initiated, 6 existing holdings were added to, 2 positions were partially reduced, and 0 were completely exited. The largest of these moves: Add: Alphabet Inc-cl C (GOOG) — shares +0.76%; Trim: Costco Wholesale CORP (COST) — shares -0.12%; Add: Martin Marietta Materials (MLM) — shares +7.95%; Add: Berkshire Hathaway Inc-cl A (BRK-A) — shares +300.00%; Trim: Berkshire Hathaway Inc-cl B (BRK-B) — shares -0.23%
What sectors does Steginsky Capital LLC focus on?
Steginsky Capital LLC is concentrated in the following sectors based on its current disclosed equity portfolio:
• Communication Services: 39.7%
• Consumer Staples: 20.2%
• Financials: 14.2%
• Industrials: 13.2%
• Materials: 12.8%