SR
Stone Run Capital, LLC Historical SEC 13F Holdings & Archive (Q3 2025)
Stone Run Capital, LLCCIK: 0001512746
Diversified strategyMomentum followerQuality / disciplined sizing
Total reported value
$253.9M
Reporting period: 2025-09-30 · Number of holdings: 71
STONE RUN CAPITAL, LLC disclosed 71 holdings in its latest 13F filing for the period ending 2025-09-30, with total reported value of $253.9M and a quarterly turnover rate of 28.8%.
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Personality snowflake
- Concentration
- 10.49
- Portfolio Stability
- 28.77
- Momentum
- 100
- Sector conviction
- 61.28
- Diversification
- 100
- Sizing Uniformity
- 90.65
Stone Run Capital, LLC's disclosed holdings carry a Herfindahl concentration index of 0.026 — mathematically equivalent to about 38 equally-sized positions, well below its 71 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes are fairly uniform across the portfolio (a coefficient of variation of 0.94), suggesting a disciplined, rules-based approach to how much capital goes into each idea.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Sector classification currently covers about 33% of this portfolio's disclosed value; the remainder includes holdings (e.g. unmapped tickers, options, or other security types) not yet covered by our sector mapping.
Source and citation information
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Recent moves
View source Form 13F filing on SEC.govAdd GLW
-0.1% $5.4M
Add APH
-2.6% $5.4M
Trim MIDD
-87.1% -$4.5M
Add ANET
-0.3% $4.5M
Trim FISV
-7.7% -$3.1M
Add GOOGL
+13.0% $3.4M
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 | APH | Amphenol Corp-cl A | Stock-Tech | 4.65% | +1.94% | -2.56% | |
| 2 | HEI | Heico CORP | Stock-Industrials | 4.51% | +0.51% | -0.04% | |
| 3 | BRK-B | Berkshire Hathaway Inc-cl B | Stock-Other | 4.07% | -0.67% | — | |
| 4 | ADSK | Autodesk Inc | Stock-Tech | 3.95% | +0.23% | -3.22% | |
| 5 | ANET | Arista Networks Inc | Stock-Tech | 3.81% | +1.64% | -0.30% | |
| 6 | MLM | Martin Marietta Materials | Stock-Materials | 3.79% | +0.60% | -3.39% | |
| 7 | WTS | Watts Water Technologies-a | Stock-Industrials | 3.52% | +0.67% | -3.18% | |
| 8 | SPGI | S&p Global Inc | Stock-Financials | 3.46% | -0.62% | -5.52% | |
| 9 | LIN | Linde plc | Stock-Materials | 3.30% | — | -0.06% | |
| 10 | LII | Lennox International Inc | Stock-Industrials | 3.28% | -0.37% | +1.35% | |
| 11 | ROP | Roper Technologies Inc | Stock-Tech | 3.15% | -0.95% | -2.73% | |
| 12 | STE | STERIS plc | Stock-Healthcare | 2.76% | +0.02% | +0.53% | |
| 13 | GLW | Corning Inc | Stock-Tech | 2.74% | +2.08% | -0.05% | |
| 14 | SHW | Sherwin-williams Co/the | Stock-Materials | 2.52% | — | -0.32% | |
| 15 | TMO | Thermo Fisher Scientific Inc | Stock-Healthcare | 2.49% | +0.03% | +13.42% | |
| 16 | ECL | Ecolab Inc | Stock-Materials | 2.34% | +0.03% | — | |
| 17 | EMR | Emerson Electric Co | Stock-Industrials | 2.27% | -0.29% | -0.34% | |
| 18 | WAB | Wabtec CORP | Stock-Industrials | 2.24% | +0.05% | -3.41% | |
| 19 | GEV | GE Vernova Inc | Stock-Industrials | 2.17% | +0.70% | -2.87% | |
| 20 | EW | Edwards Lifesciences CORP | Stock-Healthcare | 2.16% | — | -0.07% | |
| 21 | PAYX | Paychex Inc | Stock-Tech | 2.14% | -0.63% | +0.23% | |
| 22 | XYL | Xylem Inc | Stock-Industrials | 2.01% | +0.26% | -0.65% | |
| 23 | DHR | Danaher CORP | Stock-Healthcare | 1.98% | — | +0.10% | |
| 24 | TRMB | Trimble Inc | Stock-Tech | 1.91% | +0.48% | -0.42% | |
| 25 | LH | Labcorp Holdings Inc | Stock-Healthcare | 1.89% | +0.40% | -7.48% | |
| 26 | TECH | Bio-techne CORP | Stock-Healthcare | 1.71% | — | -0.06% | |
| 27 | GOOGL | Alphabet Inc-cl A | Stock-Comm Services | 1.66% | +1.31% | +13.03% | |
| 28 | NDSN | Nordson CORP | Stock-Industrials | 1.64% | +0.24% | -10.57% | |
| 29 | IT | Gartner Inc | Stock-Tech | 1.62% | -1.15% | -0.29% | |
| 30 | BDX | Becton Dickinson And Co | Stock-Healthcare | 1.56% | -0.58% | -13.32% | |
| 31 | MKC | Mccormick & Co-non Vtg Shrs | Stock-Consumer Staples | 1.56% | -0.51% | -1.17% | |
| 32 | SNPS | Synopsys Inc | Stock-Tech | 1.46% | +1.21% | +499.84% | |
| 33 | FISV | Fiserv Inc | Stock-Other | 1.45% | -1.43% | -7.74% | |
| 34 | ENTG | Entegris Inc | Stock-Tech | 1.45% | +0.31% | +20.04% | |
| 35 | RVTY | Revvity Inc | Stock-Healthcare | 1.36% | -0.49% | -0.38% | |
| 36 | TER | Teradyne Inc | Stock-Tech | 1.11% | +0.48% | -0.73% | |
| 37 | PANW | Palo Alto Networks Inc | Stock-Tech | 1.08% | +0.28% | +23.57% | |
| 38 | VLTO | Veralto CORP | Stock-Industrials | 0.87% | -0.46% | -25.96% | |
| 39 | PTC | Ptc Inc | Stock-Tech | 0.74% | +0.12% | +2.78% | |
| 40 | EPAM | Epam Systems Inc | Stock-Tech | 0.72% | -0.19% | -5.16% | |
| 41 | AAPL | Apple Inc | Stock-Tech | 0.70% | +0.05% | — | |
| 42 | AXGN | Axogen Inc | Stock-Other | 0.66% | — | +2.72% | |
| 43 | AOS | Smith (a.o.) CORP | Stock-Industrials | 0.64% | -0.15% | -16.17% | |
| 44 | BIP | Brookfield Infrastructure Partners L.P. | Stock-Utilities | 0.63% | — | +0.02% | |
| 45 | FTNT | Fortinet Inc | Stock-Tech | 0.52% | — | -1.26% | |
| 46 | ISRG | Intuitive Surgical Inc | Stock-Healthcare | 0.44% | — | — | |
| 47 | ABBV | Abbvie Inc | Stock-Healthcare | 0.34% | — | — | |
| 48 | MMM | 3m Co | Stock-Industrials | 0.26% | — | — | |
| 49 | RTX | Rtx CORP | Stock-Industrials | 0.24% | — | — | |
| 50 | ITW | Illinois Tool Works | Stock-Industrials | 0.20% | — | — |
1–50 of 71
Portfolio Performance
Performance for Q3 2026
+7.8%
Performance Last 4 Quarters
+15.7%
- Stdev
- +16.2%
- Beta
- +0.99
- Alpha
- -5.8%
- Max Drawdown
- -9.9%
- Annualized Perf
- +13.4%
- Batting Avg vs S&P
- +33.3%
- Sortino
- +1.45
- Stutzer
- +0.25
- Treynor
- +0.14
- Sterling
- +0.74
- Calmar
- +1.36
- Information Ratio
- -0.6
- Tracking Error
- +10%
- Stdev Down
- +9.6%
- Winning Months %
- +69.4%
- Losing Months %
- +30.6%
- Best 12 Months
- +32.9%
- Worst 12 Months
- +1.2%
- Efficiency Ratio
- +0.33
- Sharpe
- +0.86
- Stdev Sectors
- +10%
- Skewness
- -0.17
- Kurtosis
- -0.55
- Upside Potential
- +3.15
Reported value over time
Sector allocation
Sector allocation over time
Quarterly history
| Period | Holdings | Total value | Stability | Top holdings | |
|---|---|---|---|---|---|
| 2025 Q3 | 71 | $253.9M | 29 | ||
| 2025 Q2 | 68 | $250.1M | 0 | ||
| 2025 Q1 | 66 | $237.3M | 100 | ||
| 2024 Q4 | 68 | $254.5M | 0 | ||
| 2024 Q3 | 70 | $268.6M | 0 | ||
| 2024 Q2 | 65 | $250.4M | 0 | ||
| 2024 Q1 | 66 | $261.7M | 0 | ||
| 2023 Q4 | 65 | $233.4M | 0 | ||
| 2023 Q3 | 57 | $204.0M | 0 | ||
| 2023 Q2 | 56 | $218.7M | 0 | ||
| 2023 Q1 | 57 | $209.2M | 0 | ||
| 2022 Q4 | 58 | $197.9M | 0 | ||
| 2022 Q3 | 59 | $185.6M | 0 | ||
| 2022 Q2 | 60 | $198.8M | 0 | ||
| 2022 Q1 | 64 | $270.6M | 0 | ||
| 2021 Q4 | 62 | $309.6M | 0 | ||
| 2021 Q3 | 64 | $291.6M | 0 | ||
| 2021 Q2 | 64 | $283.5M | 15 | ||
| 2021 Q1 | 64 | $261.7M | 11 | ||
| 2020 Q4 | 60 | $251.6M | 15 | ||
| 2020 Q3 | 61 | $218.8M | 13 | ||
| 2020 Q2 | 57 | $202.1M | 23 | ||
| 2020 Q1 | 59 | $174.4M | 43 | ||
| 2019 Q4 | 59 | $225.1M | 13 | ||
| 2019 Q3 | 58 | $209.9M | 11 | ||
| 2019 Q2 | 60 | $219.0M | 11 | ||
| 2019 Q1 | 61 | $203.3M | 24 | ||
| 2018 Q4 | 59 | $160.6M | 38 | ||
| 2018 Q3 | 69 | $217.8M | 17 | ||
| 2018 Q2 | 65 | $189.7M | 13 | ||
| 2018 Q1 | 67 | $190.5M | 17 | ||
| 2017 Q4 | 69 | $194.7M | 15 | ||
| 2017 Q3 | 71 | $194.5M | 10 | ||
| 2017 Q2 | 69 | $181.0M | 11 | ||
| 2017 Q1 | 68 | $166.4M | 15 | ||
| 2016 Q4 | 66 | $153.6M | 14 | ||
| 2016 Q3 | 70 | $160.7M | 17 | ||
| 2016 Q2 | 67 | $153.4M | 18 | ||
| 2016 Q1 | 68 | $155.1M | 34 | ||
| 2015 Q4 | 67 | $143.9M | 20 | ||
| 2015 Q3 | 65 | $125.8M | 25 | ||
| 2015 Q2 | 76 | $152.7M | 13 | ||
| 2015 Q1 | 82 | $155.3M | 28 | ||
| 2014 Q4 | 85 | $145.6M | 5 | ||
| 2014 Q3 | 82 | $141.4M | 14 | ||
| 2014 Q2 | 85 | $152.4M | 16 | ||
| 2014 Q1 | 81 | $137.8M | 47 | ||
| 2013 Q4 | 78 | $141.9M | 20 | ||
| 2013 Q3 | 71 | $123.0M | 26 | ||
| 2013 Q2 | 66 | $104.0M | 0 |
Holding changes this quarter
Stone Run Capital, LLC's most significant position changes for 2025-09-30: Sold out: Ansys Inc (AKX); Sold out: Adobe Inc (ADBE); New buy: Ralliant CORP (RAL); New buy: Caterpillar Inc (CAT); New buy: Bwx Technologies Inc (BWXT).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | GLW | Corning Inc | +2.1% | -0.05% | Add |
| 2 | APH | Amphenol Corp-cl A | +1.9% | -2.56% | Trim |
| 3 | ANET | Arista Networks Inc | +1.6% | -0.30% | Trim |
| 4 | GOOGL | Alphabet Inc-cl A | +1.3% | +13.03% | Add |
| 5 | SNPS | Synopsys Inc | +1.2% | +499.84% | Add |
| 6 | GEV | GE Vernova Inc | +0.7% | -2.87% | Trim |
| 7 | WTS | Watts Water Technologies-a | +0.7% | -3.18% | Trim |
| 8 | MLM | Martin Marietta Materials | +0.6% | -3.39% | Trim |
| 9 | HEI | Heico CORP | +0.5% | -0.04% | Trim |
| 10 | TRMB | Trimble Inc | +0.5% | -0.42% | Add |
| 11 | TER | Teradyne Inc | +0.5% | -0.73% | Add |
| 12 | LH | Labcorp Holdings Inc | +0.4% | -7.48% | Add |
| 13 | ENTG | Entegris Inc | +0.3% | +20.04% | Add |
| 14 | PANW | Palo Alto Networks Inc | +0.3% | +23.57% | Add |
| 15 | XYL | Xylem Inc | +0.3% | -0.65% | Trim |
| 16 | NDSN | Nordson CORP | +0.2% | -10.57% | Add |
| 17 | ADSK | Autodesk Inc | +0.2% | -3.22% | Trim |
| 18 | PTC | Ptc Inc | +0.1% | +2.78% | Trim |
| 19 | WAB | Wabtec CORP | +0.1% | -3.41% | Trim |
| 20 | AAPL | Apple Inc | +0.1% | — | Unchanged |
| 21 | TMO | Thermo Fisher Scientific Inc | 0% | +13.42% | Add |
| 22 | ECL | Ecolab Inc | 0% | — | Unchanged |
| 23 | STE | STERIS plc | 0% | +0.53% | Trim |
| 24 | EW | Edwards Lifesciences CORP | — | -0.07% | Trim |
| 25 | AOS | Smith (a.o.) CORP | -0.2% | -16.17% | Trim |
| 26 | EPAM | Epam Systems Inc | -0.2% | -5.16% | Trim |
| 27 | FTV | Fortive CORP | -0.3% | — | Trim |
| 28 | EMR | Emerson Electric Co | -0.3% | -0.34% | Trim |
| 29 | LII | Lennox International Inc | -0.4% | +1.35% | Add |
| 30 | VLTO | Veralto CORP | -0.5% | -25.96% | Trim |
| 31 | RVTY | Revvity Inc | -0.5% | -0.38% | Trim |
| 32 | MKC | Mccormick & Co-non Vtg Shrs | -0.5% | -1.17% | Trim |
| 33 | BDX | Becton Dickinson And Co | -0.6% | -13.32% | Trim |
| 34 | SPGI | S&p Global Inc | -0.6% | -5.52% | Trim |
| 35 | PAYX | Paychex Inc | -0.6% | +0.23% | Add |
| 36 | BRK-B | Berkshire Hathaway Inc-cl B | -0.7% | — | Trim |
| 37 | ROP | Roper Technologies Inc | -1% | -2.73% | Trim |
| 38 | IT | Gartner Inc | -1.2% | -0.29% | Trim |
| 39 | FISV | Fiserv Inc | -1.4% | -7.74% | Trim |
| 40 | MIDD | Middleby CORP | -1.9% | -87.10% | Trim |
| 41 | AKX | Ansys Inc | — | EXIT | Sold out |
| 42 | ADBE | Adobe Inc | — | EXIT | Sold out |
| 43 | RAL | Ralliant CORP | — | NEW | New buy |
| 44 | CAT | Caterpillar Inc | — | NEW | New buy |
| 45 | BWXT | Bwx Technologies Inc | — | NEW | New buy |
| 46 | CDW | Cdw Corp/de | — | NEW | New buy |
| 47 | SRE | Sempra | — | NEW | New buy |
| 48 | BIPC | Brookfield Infrastructure-a | — | NEW | New buy |
| 49 | GE | General Electric | — | NEW | New buy |
| 50 | CEG | Constellation Energy | — | NEW | New buy |
💡
Data Source Notice: AlphaSMO is the web's most authoritative 13F / Inside Trader database. Institutional holdings and insider trades presented here are precisely computed to deliver accurate portfolio reporting.
Filing History
FAQ
What is Stone Run Capital, LLC and what type of investor is it?
Stone Run 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 (2025-09-30), the firm manages a tracked equity portfolio valued at approximately $253.9M, spread across 71 disclosed positions.
What are Stone Run Capital, LLC's largest equity positions?
Based on the latest 13F filing, Stone Run Capital, LLC's top holdings by market value are:
1. Amphenol Corp-cl A (APH) — $11.8M (4.7%)
2. Heico CORP (HEI) — $11.4M (4.5%)
3. Berkshire Hathaway Inc-cl B (BRK-B) — $10.3M (4.1%)
4. Autodesk Inc (ADSK) — $10.0M (4.0%)
5. Arista Networks Inc (ANET) — $9.7M (3.8%)
What changes did Stone Run Capital, LLC make in its most recent portfolio filing?
In the latest reported quarter, Stone Run Capital, LLC made 48 notable position adjustments: 8 new positions were initiated, 12 existing holdings were added to, 26 positions were partially reduced, and 2 were completely exited. The largest of these moves: Sold out: Ansys Inc (AKX); Sold out: Adobe Inc (ADBE); New buy: Ralliant CORP (RAL); New buy: Caterpillar Inc (CAT); New buy: Bwx Technologies Inc (BWXT)
What sectors does Stone Run Capital, LLC focus on?
Stone Run Capital, LLC is concentrated in the following sectors based on its current disclosed equity portfolio:
• Information Technology: 28.5%
• Financials: 22.5%
• Materials: 18.9%
• Health Care: 16.9%
• Industrials: 7.8%
• Communication Services: 5.0%
Investment Profile
Stone Run Capital, LLC returned an annualized 13.4% over the trailing 36 months — underperforming the S&P 500 by 5.8 points — based on a reconstructed track record of its disclosed 13F positions, with a beta of 0.99 (roughly in line with the market) and a 33% quarterly batting average against the index.
Its portfolio is broadly diversified and moderately active.
Its turnover score has risen from 0 to 29 over the past 4 quarters — a shift toward more active trading.
It has added to its GLW position over the past two quarters (+$5.4M, now $6.9M), while trimming MIDD over the same stretch (-$4.5M, still holding $277.2K).
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Developer Access
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REST API
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