STONE RUN CAPITAL, LLC

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CIK 1512746

13F portfolio (2025-Q3)

$254M

Positions

Implied 1Y CAGR

modeled · as filed

Long positions in SEC Section 13(f) securities (US-listed stocks, ADRs and ETFs), largest first · Δ vs 2025-Q2. A lagged quarterly snapshot (filed ≤45 days after quarter-end); excludes shorts, options, cash, and shares listed only on non-US exchanges — foreign companies held via a US listing or ADR (e.g. Alibaba, TSMC) ARE included.

Implied return what this book implies · modeled, not advice methodology →

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As filed = each book applied at its quarter-end (what the reported book did) · As copyable = applied at its statutory 45-day filing deadline (what a 13F follower could have earned).

Computing…

Hypothetical modeled performance constructed with hindsight — not actual results, and not indicative of future results. See the Disclaimer.

Exposures · what this manager owns, by sector & size (2025-Q3)

Holdings

Top 5

21.0%

Top 10

38.3%

Effective N

38.1

HHI

0.026

This quarter

5 new · 0 exit →

By sector

Information Technology34.1%

Industrials27.1%

Materials13.7%

Health Care13.3%

Financials4.1%

Consumer Discretionary3.4%

Communication Services1.7%

Consumer Staples1.6%

Other1.2%

By market cap

Large ($10–200B)76.7%

Mega (>$200B)20.3%

Mid ($2–10B)2.3%

Unknown0.8%

By region

North America99.3%

Other0.6%

Europe0.1%

By industry group GICS — finer than sector

Industry group	Weight	Names
Technology Hardware & Equipment	17.91%	12
Machinery	10.97%	8
Health Care Equipment & Supplies	7.84%	6
Chemicals	7.19%	4
Aerospace & Defense	6.98%	3
Software	6.14%	3
Commercial Services & Supplies	4.92%	2
Unclassified	4.71%	2
Electrical Equipment & Components	4.67%	4
Semiconductors & Semiconductor Equipment	4.65%	1
Construction Materials	3.79%	1
Professional Services	3.76%	2
Metals & Mining	2.74%	1
Specialty Retail	2.62%	2
Pharmaceuticals & Biotechnology	2.45%	5
Software & IT Services	2.38%	2
Health Care Providers & Services	1.89%	1
Food Products	1.56%	1
Life Sciences Tools & Services	1.36%	1
Household Durables	0.64%	1
Utilities	0.46%	5
Road & Rail	0.20%	2
Hotels, Restaurants & Leisure	0.11%	1
Oil, Gas & Consumable Fuels	0.08%	1

Top holdings

#	Ticker	Name	Sector	Weight
1	APH	AMPHENOL CORP /DE/	Information Technology	4.65%
2	HEI	HEICO CORP	Industrials	4.51%
3	BRK.B	BERKSHIRE HATHAWAY INC	Financials	4.07%
4	ADSK	Autodesk, Inc.	Information Technology	3.95%
5	ANET	Arista Networks, Inc.	Information Technology	3.81%
6	MLM	MARTIN MARIETTA MATERIALS INC	Materials	3.79%
7	WTS	WATTS WATER TECHNOLOGIES INC	Industrials	3.52%
8	SPGI	S&P Global Inc.	Industrials	3.46%
9	LIN	LINDE PLC	Materials	3.30%
10	LII	LENNOX INTERNATIONAL INC	Industrials	3.28%

70/71 names classified · sector 99.4% of weight · industry 95.3% · mkt cap 99.2%; unclassified names shown, never dropped.

Sector allocation over time · how the GICS mix & top names shifted quarter by quarter

top 5/sector, rest → “Other” · 50 quarters

Information TechnologyADSK, TMO, DHR, EPAM, APH · other

IndustrialsHEI, LII, PAYX, IT, SPGI · other

Health CareBDX, EW, TECH, STE, XRAY · other

MaterialsIFF, MLM, LIN, APD, FMC · other

Consumer DiscretionarySHW, MHK, ASH, AIN, HSIC · other

Consumer StaplesMKC, PEP

Financials

EnergySLB, DVN, CVE, EQT, XOM · other

UtilitiesOKE, D, FE, DUK, KMI · other

Communication ServicesGOOGL, DIS

UnclassifiedIHS MARKIT LTD, BARD C R INC, PRAXAIR INC, AIRGAS INC, AIR PRODS & CHEMS INC · other

Sector is classified on each name's CURRENT fundamentals, not point-in-time — apparent sector drift can reflect the market re-rating a holding, not a manager trade. 13F is a lagged quarterly snapshot of long positions in US-listed securities only — foreign companies held via a US listing or ADR ARE included, but shares listed only on non-US exchanges (plus shorts, options and cash) are not. Latest quarter: 99.4% of the book is sector-classified (unclassified names shown, never dropped).

Style box · size × value-growth placement of the reported book (2025-Q3), classified on current fundamentals (not point-in-time) — load it into PORT to overlay your own portfolio

holdings, colored by sector (62 classified)STONE RUN CAPITAL, LLC centroid (Mid Core)

Information TechnologyIndustrialsMaterialsHealth CareConsumer DiscretionaryCommunication ServicesConsumer StaplesUtilities

Style box summary for STONE RUN CAPITAL, LLC: centroid Mid Core. Heaviest cells: Mid Growth 25.9%, Large Core 18.0%, Large Growth 17.2%.

Classified: 94.0% of book weight (62/71 names) · unclassified 6.0%: BRK.B, AXGN, BIP, RAL, MIDD, CNI, CP, BIPC, SHEL. Size: cap 70/20/10 bands; style: value/growth composite on our own metrics — not Morningstar's model.

Contribution holdings-based, any period

No contribution data for this period.

Holdings· 71 positions (2025-Q3) · largest first · Δ vs 2025-Q2

#	Security	Shares	Value	Weight	Δ QoQ
1	APHAMPHENOL CORP	95,320	$12M	4.6%	TRIM −3%
2	HEIHEICO CORP NEW	35,466	$11M	4.5%	HOLD
3	BRK.BBERKSHIRE HATHAWAY INC DEL	20,575	$10M	4.1%	HOLD
4	ADSKAUTODESK INC	31,535	$10M	3.9%	TRIM −3%
5	ANETARISTA NETWORKS INC	66,400	$10M	3.8%	HOLD
6	MLMMARTIN MARIETTA MATLS INC	15,263	$10M	3.8%	TRIM −3%
7	WTSWATTS WATER TECHNOLOGIES INC	32,000	$9M	3.5%	TRIM −3%
8	SPGIS&P GLOBAL INC	18,061	$9M	3.5%	TRIM −6%
9	LINLINDE PLC	17,645	$8M	3.3%	HOLD
10	LIILENNOX INTL INC	15,715	$8M	3.3%	HOLD
11	ROPROPER TECHNOLOGIES INC	16,021	$8M	3.1%	TRIM −3%
12	STESTERIS PLC	28,330	$7M	2.8%	HOLD
13	GLWCORNING INC	84,724	$7M	2.7%	HOLD
14	SHWSHERWIN WILLIAMS CO	18,490	$6M	2.5%	HOLD
15	TMOTHERMO FISHER SCIENTIFIC INC	13,012	$6M	2.5%	ADD 13%
16	ECLECOLAB INC	21,660	$6M	2.3%	HOLD
17	EMREMERSON ELEC CO	43,896	$6M	2.3%	HOLD
18	WABWABTEC	28,335	$6M	2.2%	TRIM −3%
19	GEVGE VERNOVA INC	8,956	$6M	2.2%	TRIM −3%
20	EWEDWARDS LIFESCIENCES CORP	70,400	$5M	2.2%	HOLD
21	PAYXPAYCHEX INC	42,853	$5M	2.1%	HOLD
22	XYLXYLEM INC	34,545	$5M	2.0%	HOLD
23	DHRDANAHER CORP DEL	25,388	$5M	2.0%	HOLD
24	TRMBTRIMBLE INC	59,440	$5M	1.9%	HOLD
25	LHLABCORP HOLDINGS INC	16,705	$5M	1.9%	TRIM −7%
26	TECHBIO-TECHNE CORP	78,195	$4M	1.7%	HOLD
27	GOOGLALPHABET INC	17,350	$4M	1.7%	ADD 13%
28	NDSNNORDSON CORP	18,315	$4M	1.6%	TRIM −11%
29	ITGARTNER INC	15,602	$4M	1.6%	HOLD
30	BDXBECTON DICKINSON & CO	21,139	$4M	1.6%	TRIM −13%
31	MKCMCCORMICK & CO INC	59,050	$4M	1.6%	HOLD
32	SNPSSYNOPSYS INC	7,498	$4M	1.5%	ADD 500%
33	FISVFISERV INC	28,625	$4M	1.5%	TRIM −8%
34	ENTGENTEGRIS INC	39,830	$4M	1.5%	ADD 20%
35	RVTYREVVITY INC	39,283	$3M	1.4%	HOLD
36	TERTERADYNE INC	20,450	$3M	1.1%	HOLD
37	PANWPALO ALTO NETWORKS INC	13,500	$3M	1.1%	ADD 24%
38	VLTOVERALTO CORP	20,824	$2M	0.9%	TRIM −26%
39	PTCPTC INC	9,230	$2M	0.7%	ADD 3%
40	EPAMEPAM SYS INC	12,140	$2M	0.7%	TRIM −5%
41	AAPLAPPLE INC	6,980	$2M	0.7%	HOLD
42	AXGNAXOGEN INC	94,526	$2M	0.7%	ADD 3%
43	AOSSMITH A O CORP	22,300	$2M	0.6%	TRIM −16%
44	BIPBROOKFIELD INFRAST PARTNERS	48,930	$2M	0.6%	HOLD
45	FTNTFORTINET INC	15,650	$1M	0.5%	HOLD
46	ISRGINTUITIVE SURGICAL INC	2,500	$1M	0.4%	HOLD
47	ABBVABBVIE INC	3,700	$856,698	0.3%	HOLD
48	MMM3M CO	4,189	$650,049	0.3%	HOLD
49	RTXRTX CORPORATION	3,573	$597,870	0.2%	HOLD
50	ITWILLINOIS TOOL WKS INC	1,950	$508,482	0.2%	HOLD
51	ABTABBOTT LABS	3,300	$442,002	0.2%	HOLD
52	FTVFORTIVE CORP	8,404	$411,712	0.2%	HOLD
53	WWDWOODWARD INC	1,500	$379,065	0.1%	HOLD
54	OKEONEOK INC NEW	4,550	$332,013	0.1%	HOLD
55	JNJJOHNSON & JOHNSON	1,670	$309,651	0.1%	HOLD
56	RALRALLIANT CORP	7,016	$306,810	0.1%	NEW
57	CATCATERPILLAR INC	600	$286,290	0.1%	HOLD
58	MIDDMIDDLEBY CORP	2,085	$277,159	0.1%	TRIM −87%
59	MCDMCDONALDS CORP	900	$273,501	0.1%	HOLD
60	CNICANADIAN NATL RY CO	2,900	$273,470	0.1%	HOLD
61	BWXTBWX TECHNOLOGIES INC	1,428	$263,280	0.1%	HOLD
62	APDAIR PRODS & CHEMS INC	950	$259,084	0.1%	HOLD
63	CDWCDW CORP	1,620	$258,034	0.1%	ADD 22%
64	AMGNAMGEN INC	900	$253,980	0.1%	HOLD
65	CPCANADIAN PACIFIC KANSAS CITY	3,060	$227,939	0.1%	HOLD
66	SRESEMPRA	2,500	$224,950	0.1%	NEW
67	BIPCBROOKFIELD INFRASTRUCTURE CO	5,191	$213,471	0.1%	HOLD
68	GEGE AEROSPACE	708	$212,935	0.1%	NEW
69	CEGCONSTELLATION ENERGY CORP	636	$209,289	0.1%	HOLD
70	SHELSHELL PLC	2,810	$200,999	0.1%	NEW
71	DUKDUKE ENERGY CORP NEW	1,621	$200,599	0.1%	NEW

☆STONE RUN CAPITAL, LLC