DUDLEY & SHANLEY, INC. Long-Term Concentrated

CIK: 0000883511 · Show all filings

Period: Q3 2025 (← Previous) (Next →)

Filing Date: Oct 8, 2025

Total Value ($000): $621,511 (100.0% shares, 0.0% debt)

Holdings (32)

WPM Wheaton Precious Mtls 12.5%

Value ($000) $77,803 Shares 695,665 Est. Cost $26.64 Unrealized +266.7%

APH Amphenol Corp. 6.3%

Value ($000) $39,179 Shares 316,596 Est. Cost $49.89 Unrealized +119.3%

V Visa Inc. 5.3%

Value ($000) $33,176 Shares 97,181 Est. Cost $208.01 Unrealized +65.9%

— Aon plc 5.1%

Value ($000) $31,640 Shares 88,732 Est. Cost $172.84 Unrealized —

SCI Service Corp. Int'l 4.9%

Value ($000) $30,744 Shares 369,433 Est. Cost $38.46 Unrealized +107.5%

ADI Analog Devices 4.9%

Value ($000) $30,712 Shares 124,996 Est. Cost $184.36 Unrealized +29.6%

ECL Ecolab Inc. 4.6%

Value ($000) $28,751 Shares 104,983 Est. Cost $96.52 Unrealized +180.1%

ROL Rollins, Inc. 4.3%

Value ($000) $26,765 Shares 455,650 Est. Cost $39.72 Unrealized +42.5%

AME Ametek Inc. 4.2%

Value ($000) $26,280 Shares 139,786 Est. Cost $125.21 Unrealized +46.5%

RYAN Ryan Specialty Hldngs 4.2%

Value ($000) $26,034 Shares 461,921 Est. Cost $38.14 Unrealized +55.3%

AWK Amer. Water Works 3.8%

Value ($000) $23,545 Shares 169,159 Est. Cost $136.82 Unrealized +2.3%

SCHW Charles Schwab 3.7%

Value ($000) $22,995 Shares 240,863 Est. Cost $65.84 Unrealized +43.6%

DHR Danaher Corp. 3.7%

Value ($000) $22,788 Shares 114,941 Est. Cost $171.58 Unrealized +15.6%

FISV Fiserv Inc. 3.6%

Value ($000) $22,553 Shares 174,921 Est. Cost $64.10 Unrealized +123.6%

DCI Donaldson Co., Inc. 3.6%

Value ($000) $22,147 Shares 270,585 Est. Cost $72.73 Unrealized +2.9%

DOX Amdocs Ltd. 3.3%

Value ($000) $20,229 Shares 246,539 Est. Cost $83.79 Unrealized +2.1%

KRNT Kornit Digital 2.7%

Value ($000) $16,995 Shares 1,258,895 Est. Cost $18.83 Unrealized -9.8%

FERG Ferguson Enterprises 2.7%

Value ($000) $16,956 Shares 75,500 Est. Cost $194.48 Unrealized +15.6%

KAI Kadant Inc. 2.6%

Value ($000) $16,419 Shares 55,175 Est. Cost $295.94 Unrealized +10.0%

WSO Watsco, Inc. 2.6%

Value ($000) $15,917 Shares 39,370 Est. Cost $356.62 Unrealized +19.9%

PGR Progressive Corp. 2.6%

Value ($000) $15,868 Shares 64,255 Est. Cost $63.46 Unrealized +265.1%

ALSN Allison Transmission 2.2%

Value ($000) $13,967 Shares 164,547 Est. Cost $38.61 Unrealized +129.3%

NXE NexGen Energy Ltd. 1.8%

Value ($000) $11,055 Shares 1,235,150 Est. Cost $1.31 Unrealized +463.0%

A Agilent Tech, Inc. 1.1%

Value ($000) $7,085 Shares 55,200 Est. Cost $132.85 Unrealized -9.3%

HEI HEICO Corp. 1.0%

Value ($000) $6,295 Shares 19,500 Est. Cost $167.85 Unrealized +89.6%

MSFT Microsoft Corp. 0.9%

Value ($000) $5,622 Shares 10,854 Est. Cost $90.57 Unrealized +461.6%

GNRC Generac Holdings 0.5%

Value ($000) $3,289 Shares 19,650 Est. Cost $113.74 Unrealized +54.0%

ORA Ormat Technologies 0.5%

Value ($000) $2,907 Shares 30,200 Est. Cost $68.71 Unrealized +31.0%

PHO Invesco Water ETF 0.4%

Value ($000) $2,364 Shares 32,780 Est. Cost $53.35 Unrealized —

ROP Roper Technologies 0.2%

Value ($000) $1,272 Shares 2,550 Est. Cost $268.84 Unrealized +97.7%

OCUL Ocular Therapeutix 0.0%

Value ($000) $152 Shares 13,000 Est. Cost $6.19 Unrealized +93.1%

STLNF Stallion Uranium Corp 0.0%

Value ($000) $10 Shares 30,000 Est. Cost $0.32 Unrealized —

Ticker	Issuer	Shares	Value ($000)	%	Est. Cost	Unrealized	Class	CUSIP
WPM	Wheaton Precious Mtls	695,665	$77,803	12.5%	$26.64	+266.7%	COM	962879102
APH	Amphenol Corp.	316,596	$39,179	6.3%	$49.89	+119.3%	COM	032095101
V	Visa Inc.	97,181	$33,176	5.3%	$208.01	+65.9%	COM	92826C839
—	Aon plc	88,732	$31,640	5.1%	$172.84	—	COM	g0403h108
SCI	Service Corp. Int'l	369,433	$30,744	4.9%	$38.46	+107.5%	COM	817565104
ADI	Analog Devices	124,996	$30,712	4.9%	$184.36	+29.6%	COM	032654105
ECL	Ecolab Inc.	104,983	$28,751	4.6%	$96.52	+180.1%	COM	278865100
ROL	Rollins, Inc.	455,650	$26,765	4.3%	$39.72	+42.5%	COM	775711104
AME	Ametek Inc.	139,786	$26,280	4.2%	$125.21	+46.5%	COM	031100100
RYAN	Ryan Specialty Hldngs	461,921	$26,034	4.2%	$38.14	+55.3%	COM	78351F107
AWK	Amer. Water Works	169,159	$23,545	3.8%	$136.82	+2.3%	COM	030420103
SCHW	Charles Schwab	240,863	$22,995	3.7%	$65.84	+43.6%	COM	808513105
DHR	Danaher Corp.	114,941	$22,788	3.7%	$171.58	+15.6%	COM	235851102
FISV	Fiserv Inc.	174,921	$22,553	3.6%	$64.10	+123.6%	COM	337738108
DCI	Donaldson Co., Inc.	270,585	$22,147	3.6%	$72.73	+2.9%	COM	257651109
DOX	Amdocs Ltd.	246,539	$20,229	3.3%	$83.79	+2.1%	COM	G02602103
KRNT	Kornit Digital	1,258,895	$16,995	2.7%	$18.83	-9.8%	COM	M6372Q113
FERG	Ferguson Enterprises	75,500	$16,956	2.7%	$194.48	+15.6%	COM	31488V107
KAI	Kadant Inc.	55,175	$16,419	2.6%	$295.94	+10.0%	COM	48282T104
WSO	Watsco, Inc.	39,370	$15,917	2.6%	$356.62	+19.9%	COM	942622200
PGR	Progressive Corp.	64,255	$15,868	2.6%	$63.46	+265.1%	COM	743315103
ALSN	Allison Transmission	164,547	$13,967	2.2%	$38.61	+129.3%	COM	01973R101
NXE	NexGen Energy Ltd.	1,235,150	$11,055	1.8%	$1.31	+463.0%	COM	65340P106
A	Agilent Tech, Inc.	55,200	$7,085	1.1%	$132.85	-9.3%	COM	00846U101
HEI	HEICO Corp.	19,500	$6,295	1.0%	$167.85	+89.6%	COM	422806109
MSFT	Microsoft Corp.	10,854	$5,622	0.9%	$90.57	+461.6%	COM	594918104
GNRC	Generac Holdings	19,650	$3,289	0.5%	$113.74	+54.0%	COM	368736104
ORA	Ormat Technologies	30,200	$2,907	0.5%	$68.71	+31.0%	COM	686688102
PHO	Invesco Water ETF	32,780	$2,364	0.4%	$53.35	—	COM	46137V142
ROP	Roper Technologies	2,550	$1,272	0.2%	$268.84	+97.7%	COM	776696106
OCUL	Ocular Therapeutix	13,000	$152	0.0%	$6.19	+93.1%	COM	67576A100
STLNF	Stallion Uranium Corp	30,000	$10	0.0%	$0.32	—	COM	852919208