Institutional Manager · CIK 0001512746
STONE RUN CAPITAL, LLC
NEW YORK, NY · File #028-14680
Latest AUM
$253.9M
Positions
71
Top-10 Concentration
39.2%
Filings
8
Portfolio Value Over Time
2023-12
2024-03
2024-06
2024-09
2024-12
2025-03
2025-06
2025-09
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| EXITED | ANSYS INC | 03662Q105 | -16,040 | -$5.6M | $0 |
| ADD | SYNOPSYS INC | 871607107 | +6,248 | +$3.1M | -$24,113 |
| REDUCE | MIDDLEBY CORP | 596278101 | -14,075 | -$1.9M | -$178,892 |
| REDUCE | VERALTO CORP | 92338C103 | -7,300 | -$778,263 | +$159,197 |
| ADD | THERMO FISHER SCIENTIFIC INC | 883556102 | +1,540 | +$746,931 | +$912,712 |
| ADD | ENTEGRIS INC | 29362U104 | +6,650 | +$614,859 | +$391,856 |
| REDUCE | BECTON DICKINSON & CO | 075887109 | -3,249 | -$608,112 | +$363,904 |
| ADD | PALO ALTO NETWORKS INC | 697435105 | +2,575 | +$524,322 | -$11,144 |
| REDUCE | S&P GLOBAL INC | 78409V104 | -1,056 | -$513,966 | -$775,768 |
| REDUCE | NORDSON CORP | 655663102 | -2,164 | -$491,111 | +$257,607 |
Filing History
- 13F HOLDINGS REPORTQ/E Sep 202571 pos · $253.9M
- 13F HOLDINGS REPORTQ/E Jun 202568 pos · $250.1M
- 13F HOLDINGS REPORTQ/E Mar 202566 pos · $237.3M
- 13F HOLDINGS REPORTQ/E Dec 202468 pos · $254.5M
- 13F HOLDINGS REPORTQ/E Sep 202470 pos · $268.6M
- 13F HOLDINGS REPORTQ/E Jun 202465 pos · $250.4M
- 13F HOLDINGS REPORTQ/E Mar 202466 pos · $261.7M
- 13F HOLDINGS REPORTQ/E Dec 202357 pos · $204.0M
Top 20 Holdings — Sep 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | AMPHENOL CORP NEW | 032095101 | 95,320 | $11.8M | 4.76% |
| 2 | HEICO CORP NEW | 422806109 | 35,466 | $11.4M | 4.62% |
| 3 | BERKSHIRE HATHAWAY INC DEL | 084670702 | 20,575 | $10.3M | 4.17% |
| 4 | AUTODESK INC | 052769106 | 31,535 | $10.0M | 4.04% |
| 5 | ARISTA NETWORKS INC | 040413205 | 66,400 | $9.7M | 3.90% |
| 6 | MARTIN MARIETTA MATLS INC | 573284106 | 15,263 | $9.6M | 3.88% |
| 7 | WATTS WATER TECHNOLOGIES INC | 942749102 | 32,000 | $8.9M | 3.60% |
| 8 | S&P GLOBAL INC | 78409V104 | 18,061 | $8.8M | 3.54% |
| 9 | LINDE PLC | G54950103 | 17,645 | $8.4M | 3.38% |
| 10 | LENNOX INTL INC | 526107107 | 15,715 | $8.3M | 3.35% |
| 11 | ROPER TECHNOLOGIES INC | 776696106 | 16,021 | $8.0M | 3.22% |
| 12 | STERIS PLC | G8473T100 | 28,330 | $7.0M | 2.83% |
| 13 | CORNING INC | 219350105 | 84,724 | $6.9M | 2.80% |
| 14 | SHERWIN WILLIAMS CO | 824348106 | 18,490 | $6.4M | 2.58% |
| 15 | THERMO FISHER SCIENTIFIC INC | 883556102 | 13,012 | $6.3M | 2.54% |
| 16 | ECOLAB INC | 278865100 | 21,660 | $5.9M | 2.39% |
| 17 | EMERSON ELEC CO | 291011104 | 43,896 | $5.8M | 2.32% |
| 18 | WABTEC | 929740108 | 28,335 | $5.7M | 2.29% |
| 19 | GE VERNOVA INC | 36828A101 | 8,956 | $5.5M | 2.22% |
| 20 | EDWARDS LIFESCIENCES CORP | 28176E108 | 70,400 | $5.5M | 2.21% |