CIK: 0001512746
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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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.
Add 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
| # | 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% | — | — |
Performance for Q3 2026
+2.6%
Performance Last 4 Quarters
+8.3%
Based on 61% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2025-09-30 | 71 | $253.9M | 29 | |
| 2025-06-30 | 68 | $250.1M | 0 | |
| 2025-03-31 | 66 | $237.3M | 100 | |
| 2024-12-31 | 68 | $254.5M | 0 | |
| 2024-09-30 | 70 | $268.6M | 0 | |
| 2024-06-30 | 65 | $250.4M | 0 | |
| 2024-03-31 | 66 | $261.7M | 0 | |
| 2023-12-31 | 65 | $233.4M | 0 | |
| 2023-09-30 | 57 | $204.0M | 0 | |
| 2023-06-30 | 56 | $218.7M | 0 | |
| 2023-03-31 | 57 | $209.2M | 0 | |
| 2022-12-31 | 58 | $197.9M | 0 | |
| 2022-09-30 | 59 | $185.6M | 0 | |
| 2022-06-30 | 60 | $198.8M | 0 | |
| 2022-03-31 | 64 | $270.6M | 0 | |
| 2021-12-31 | 62 | $309.6M | 0 | |
| 2021-09-30 | 64 | $291.6M | 0 | |
| 2021-06-30 | 64 | $283.5M | 15 | |
| 2021-03-31 | 64 | $261.7M | 11 | |
| 2020-12-31 | 60 | $251.6M | 15 | |
| 2020-09-30 | 61 | $218.8M | 13 | |
| 2020-06-30 | 57 | $202.1M | 23 | |
| 2020-03-31 | 59 | $174.4M | 43 | |
| 2019-12-31 | 59 | $225.1M | 13 | |
| 2019-09-30 | 58 | $209.9M | 11 | |
| 2019-06-30 | 60 | $219.0M | 11 | |
| 2019-03-31 | 61 | $203.3M | 24 | |
| 2018-12-31 | 59 | $160.6M | 38 | |
| 2018-09-30 | 69 | $217.8M | 17 | |
| 2018-06-30 | 65 | $189.7M | 13 | |
| 2018-03-31 | 67 | $190.5M | 17 | |
| 2017-12-31 | 69 | $194.7M | 15 | |
| 2017-09-30 | 71 | $194.5M | 10 | |
| 2017-06-30 | 69 | $181.0M | 11 | |
| 2017-03-31 | 68 | $166.4M | 15 | |
| 2016-12-31 | 66 | $153.6M | 14 | |
| 2016-09-30 | 70 | $160.7M | 17 | |
| 2016-06-30 | 67 | $153.4M | 18 | |
| 2016-03-31 | 68 | $155.1M | 34 | |
| 2015-12-31 | 67 | $143.9M | 20 | |
| 2015-09-30 | 65 | $125.8M | 25 | |
| 2015-06-30 | 76 | $152.7M | 13 | |
| 2015-03-31 | 82 | $155.3M | 28 | |
| 2014-12-31 | 85 | $145.6M | 5 | |
| 2014-09-30 | 82 | $141.4M | 14 | |
| 2014-06-30 | 85 | $152.4M | 16 | |
| 2014-03-31 | 81 | $137.8M | 47 | |
| 2013-12-31 | 78 | $141.9M | 20 | |
| 2013-09-30 | 71 | $123.0M | 26 | |
| 2013-06-30 | 66 | $104.0M | 0 |
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 |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2025-09-30 | 2025-11-14 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-08-14 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-05-14 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-02-14 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-11-14 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-08-14 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-05-14 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-02-14 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-11-14 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-08-15 | Amendment | View on EDGAR |
| 2023-06-30 | 2023-08-14 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-05-15 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-02-14 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2022-11-14 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-08-15 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-05-16 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-02-14 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-11-15 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-08-16 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-05-17 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-02-16 | 13F-HR | View on EDGAR |
| 2020-09-30 | 2020-11-13 | 13F-HR | View on EDGAR |
| 2020-06-30 | 2020-08-14 | 13F-HR | View on EDGAR |
| 2020-03-31 | 2020-05-15 | 13F-HR | View on EDGAR |
| 2019-12-31 | 2020-02-14 | 13F-HR | View on EDGAR |
| 2019-09-30 | 2019-11-14 | 13F-HR | View on EDGAR |
| 2019-06-30 | 2019-08-14 | 13F-HR | View on EDGAR |
| 2019-03-31 | 2019-05-14 | 13F-HR | View on EDGAR |
| 2018-12-31 | 2019-02-14 | 13F-HR | View on EDGAR |
| 2018-09-30 | 2018-11-14 | 13F-HR | View on EDGAR |
| 2018-06-30 | 2018-08-14 | 13F-HR | View on EDGAR |
| 2018-03-31 | 2018-05-14 | 13F-HR | View on EDGAR |
| 2017-12-31 | 2018-02-15 | 13F-HR | View on EDGAR |
| 2017-09-30 | 2017-11-14 | 13F-HR | View on EDGAR |
| 2017-06-30 | 2017-08-14 | 13F-HR | View on EDGAR |
| 2017-03-31 | 2017-05-15 | 13F-HR | View on EDGAR |
| 2016-12-31 | 2017-02-13 | 13F-HR | View on EDGAR |
| 2016-09-30 | 2016-11-14 | 13F-HR | View on EDGAR |
| 2016-06-30 | 2016-08-15 | 13F-HR | View on EDGAR |
| 2016-03-31 | 2016-05-13 | 13F-HR | View on EDGAR |
| 2015-12-31 | 2016-02-12 | 13F-HR | View on EDGAR |
| 2015-09-30 | 2015-11-13 | 13F-HR | View on EDGAR |
| 2015-06-30 | 2015-08-14 | 13F-HR | View on EDGAR |
| 2015-03-31 | 2015-05-14 | 13F-HR | View on EDGAR |
| 2014-12-31 | 2015-02-13 | 13F-HR | View on EDGAR |
| 2014-09-30 | 2014-11-14 | 13F-HR | View on EDGAR |
| 2014-06-30 | 2014-08-14 | 13F-HR | View on EDGAR |
| 2014-03-31 | 2014-05-14 | 13F-HR | View on EDGAR |
| 2013-12-31 | 2014-02-11 | 13F-HR | View on EDGAR |
| 2013-09-30 | 2013-11-14 | 13F-HR | View on EDGAR |
| 2013-06-30 | 2013-08-14 | 13F-HR | View on EDGAR |
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