SC
Steginsky Capital LLC 13F Portfolio Snapshot & Holdings (Q2 2026)
Steginsky Capital LLCCIK: 0001120048
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%.
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Personality snowflake
- Concentration
- 88.15
- Portfolio Stability
- 12.27
- Momentum
- 100
- Sector conviction
- 75.59
- Diversification
- 16
- Sizing Uniformity
- 90.66
Steginsky Capital LLC's disclosed holdings carry a Herfindahl concentration index of 0.220 — mathematically equivalent to about 5 equally-sized positions, close to its 8 actual disclosed holdings. Value is spread relatively evenly across the portfolio rather than concentrated in a handful of names.
Position sizes are fairly uniform across the portfolio (a coefficient of variation of 0.93), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
Recent activity leans toward adding more aggressively to already-large existing positions than to newly initiated ones (a 12.0 percentage-point tilt) — a pattern consistent with a momentum-following approach.
Source and citation information
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Recent moves
View source Form 13F filing on SEC.govAdd 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% |
Portfolio Performance
Performance for Q3 2026
-3.4%
Performance Last 4 Quarters
+15.6%
- Stdev
- +14%
- Beta
- +0.8
- Alpha
- +5%
- Max Drawdown
- -9.4%
- Annualized Perf
- +22%
- Batting Avg vs S&P
- +50%
- Sortino
- +3.38
- Stutzer
- +0.44
- Treynor
- +0.26
- Sterling
- +1.39
- Calmar
- +2.34
- Information Ratio
- +0.1
- Tracking Error
- +9.8%
- Stdev Down
- +6.2%
- Winning Months %
- +58.3%
- Losing Months %
- +41.7%
- Best 12 Months
- +40.1%
- Worst 12 Months
- +9.7%
- Efficiency Ratio
- +0.65
- Sharpe
- +1.5
- Stdev Sectors
- +10.2%
- Skewness
- +0.1
- Kurtosis
- -0.42
- Upside Potential
- +5.07
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
| Period | Holdings | Total value | Stability | Top holdings | |
|---|---|---|---|---|---|
| 2026 Q2 | 8 | $666.3M | 12 | ||
| 2026 Q1 | 8 | $605.1M | 10 | ||
| 2025 Q4 | 8 | $593.4M | 12 | ||
| 2025 Q3 | 8 | $544.6M | 24 | ||
| 2025 Q2 | 8 | $489.1M | 0 | ||
| 2025 Q1 | 7 | $447.2M | 100 | ||
| 2024 Q4 | 7 | $466.9M | 0 | ||
| 2024 Q3 | 7 | $440.6M | 0 | ||
| 2024 Q2 | 7 | $435.3M | 0 | ||
| 2024 Q1 | 7 | $415.3M | 0 | ||
| 2023 Q4 | 7 | $363.0M | 0 | ||
| 2023 Q3 | 7 | $325.4M | 0 | ||
| 2023 Q2 | 7 | $320.1M | 0 | ||
| 2023 Q1 | 7 | $280.2M | 0 | ||
| 2022 Q4 | 7 | $270.8M | 0 | ||
| 2022 Q3 | 7 | $263.3M | 0 | ||
| 2022 Q2 | 7 | $279.9M | 0 | ||
| 2022 Q1 | 7 | $305.2M | 0 | ||
| 2021 Q4 | 7 | $305.2M | 0 | ||
| 2021 Q3 | 8 | $266.2M | 0 | ||
| 2021 Q2 | 8 | $249.8M | 100 | ||
| 2021 Q1 | 8 | $215.1M | 11 | ||
| 2020 Q4 | 8 | $200.4M | 12 | ||
| 2020 Q3 | 8 | $176.9M | 12 | ||
| 2020 Q2 | 8 | $159.6M | 11 | ||
| 2020 Q1 | 8 | $143.4M | 19 | ||
| 2019 Q4 | 8 | $173.1M | 7 | ||
| 2019 Q3 | 8 | $162.4M | 10 | ||
| 2019 Q2 | 8 | $153.0M | 9 | ||
| 2019 Q1 | 8 | $140.5M | 10 | ||
| 2018 Q4 | 8 | $127.2M | 17 | ||
| 2018 Q3 | 10 | $110.0M | 19 | ||
| 2018 Q2 | 8 | $111.2M | 15 | ||
| 2018 Q1 | 8 | $111.1M | 5 | ||
| 2017 Q4 | 8 | $106.8M | 8 | ||
| 2017 Q3 | 10 | $110.0M | 8 | ||
| 2017 Q2 | 9 | $101.8M | 18 | ||
| 2017 Q1 | 9 | $115.1M | 7 | ||
| 2016 Q4 | 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 |
* This report is exclusively curated by the AlphaSMO team. AlphaSMO is the web's most authoritative 13F / Inside Trader database, delivering precise insider trading and institutional holdings insights.
Filing History
FAQ
What is Steginsky Capital LLC and what type of investor is it?
Steginsky Capital LLC is an 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%
Investment Profile
Steginsky Capital LLC returned an annualized 22.0% over the trailing 36 months — outperforming the S&P 500 by 5.0 points — based on a reconstructed track record of its disclosed 13F positions, with a beta of 0.80 (less volatile than the market) and a 50% quarterly batting average against the index.
Its portfolio is concentrated and long-term-holding, with 39.7% of the portfolio concentrated in Communication Services.
It has added to its FAST position for two straight quarters, increasing it by $18.6M to reach $82.6M.
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Developer Access
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