DUDLEY & SHANLEY, INC. Long-Term Concentrated

CIK: 0000883511 · Show all filings

Period: Q2 2025 (← Previous) (Next →)

Filing Date: Jul 9, 2025

Total Value ($000): $636,818 (100.0% shares, 0.0% debt)

Holdings (36)

WPM Wheaton Precious Mtls 10.8%

Value ($000) $68,560 Shares 763,475 Est. Cost $26.64 Unrealized +215.6%

APH Amphenol Corp. 6.6%

Value ($000) $42,265 Shares 428,000 Est. Cost $49.89 Unrealized +63.1%

V Visa Inc. 5.4%

Value ($000) $34,515 Shares 97,211 Est. Cost $208.01 Unrealized +66.8%

— Aon plc 5.0%

Value ($000) $31,620 Shares 88,632 Est. Cost $172.84 Unrealized —

RYAN Ryan Specialty Hldngs 4.9%

Value ($000) $31,416 Shares 462,071 Est. Cost $38.14 Unrealized +80.9%

SCI Service Corp. Int'l 4.7%

Value ($000) $30,039 Shares 369,033 Est. Cost $38.46 Unrealized +103.0%

ADI Analog Devices 4.6%

Value ($000) $29,271 Shares 122,976 Est. Cost $183.47 Unrealized +12.3%

FISV Fiserv Inc. 4.6%

Value ($000) $29,197 Shares 169,344 Est. Cost $61.49 Unrealized +194.9%

ECL Ecolab Inc. 4.4%

Value ($000) $28,287 Shares 104,983 Est. Cost $96.52 Unrealized +161.4%

ROL Rollins, Inc. 4.0%

Value ($000) $25,778 Shares 456,900 Est. Cost $39.72 Unrealized +40.2%

AME Ametek Inc. 4.0%

Value ($000) $25,278 Shares 139,686 Est. Cost $125.21 Unrealized +36.8%

AWK Amer. Water Works 3.5%

Value ($000) $22,439 Shares 161,304 Est. Cost $136.66 Unrealized +3.3%

DOX Amdocs Ltd. 3.5%

Value ($000) $22,436 Shares 245,901 Est. Cost $83.79 Unrealized +4.7%

SCHW Charles Schwab 3.5%

Value ($000) $21,985 Shares 240,963 Est. Cost $65.84 Unrealized +26.3%

DHR Danaher Corp. 3.4%

Value ($000) $21,641 Shares 109,552 Est. Cost $170.27 Unrealized +13.4%

WSO Watsco, Inc. 2.8%

Value ($000) $17,591 Shares 39,833 Est. Cost $356.62 Unrealized +30.1%

KAI Kadant Inc. 2.8%

Value ($000) $17,515 Shares 55,175 Est. Cost $295.94 Unrealized +5.4%

PGR Progressive Corp. 2.7%

Value ($000) $17,147 Shares 64,255 Est. Cost $63.46 Unrealized +305.8%

FERG Ferguson Enterprises 2.6%

Value ($000) $16,440 Shares 75,500 Est. Cost $194.48 Unrealized -6.4%

ALSN Allison Transmission 2.5%

Value ($000) $15,630 Shares 164,547 Est. Cost $38.61 Unrealized +148.3%

FELE Franklin Elec. Co., Inc. 2.5%

Value ($000) $15,614 Shares 173,991 Est. Cost $87.79 Unrealized -1.1%

DCI Donaldson Co., Inc. 2.3%

Value ($000) $14,507 Shares 209,185 Est. Cost $72.11 Unrealized -8.0%

KRNT Kornit Digital 2.0%

Value ($000) $12,689 Shares 637,300 Est. Cost $20.62 Unrealized -3.3%

NXE NexGen Energy Ltd. 1.3%

Value ($000) $8,585 Shares 1,237,000 Est. Cost $1.31 Unrealized +331.1%

GRID First Trust Cln Edge 1.0%

Value ($000) $6,520 Shares 46,900 Est. Cost $105.12 Unrealized —

A Agilent Tech, Inc. 1.0%

Value ($000) $6,514 Shares 55,200 Est. Cost $132.85 Unrealized -16.9%

HEI HEICO Corp. 1.0%

Value ($000) $6,412 Shares 19,550 Est. Cost $167.85 Unrealized +64.8%

MSFT Microsoft Corp. 0.8%

Value ($000) $5,399 Shares 10,854 Est. Cost $90.57 Unrealized +377.4%

GNRC Generac Holdings 0.4%

Value ($000) $2,814 Shares 19,650 Est. Cost $113.74 Unrealized +7.3%

ORA Ormat Technologies 0.4%

Value ($000) $2,513 Shares 30,000 Est. Cost $68.71 Unrealized +8.5%

PHO Invesco Water ETF 0.4%

Value ($000) $2,292 Shares 32,780 Est. Cost $53.35 Unrealized —

AVTR Avantor Inc. 0.3%

Value ($000) $1,763 Shares 131,000 Est. Cost $22.95 Unrealized -40.4%

ROP Roper Technologies 0.2%

Value ($000) $1,445 Shares 2,550 Est. Cost $268.84 Unrealized +109.1%

— Enphase Energy, Inc. 0.1%

Value ($000) $539 Shares 13,600 Est. Cost $81.91 Unrealized —

OCUL Ocular Therapeutix 0.0%

Value ($000) $152 Shares 16,400 Est. Cost $6.19 Unrealized +26.4%

SASKF ATHA Energy Corp. 0.0%

Value ($000) $8 Shares 19,000 Est. Cost $0.77 Unrealized -56.9%

Ticker	Issuer	Shares	Value ($000)	%	Est. Cost	Unrealized	Class	CUSIP
WPM	Wheaton Precious Mtls	763,475	$68,560	10.8%	$26.64	+215.6%	COM	962879102
APH	Amphenol Corp.	428,000	$42,265	6.6%	$49.89	+63.1%	COM	032095101
V	Visa Inc.	97,211	$34,515	5.4%	$208.01	+66.8%	COM	92826C839
—	Aon plc	88,632	$31,620	5.0%	$172.84	—	COM	g0403h108
RYAN	Ryan Specialty Hldngs	462,071	$31,416	4.9%	$38.14	+80.9%	COM	78351F107
SCI	Service Corp. Int'l	369,033	$30,039	4.7%	$38.46	+103.0%	COM	817565104
ADI	Analog Devices	122,976	$29,271	4.6%	$183.47	+12.3%	COM	032654105
FISV	Fiserv Inc.	169,344	$29,197	4.6%	$61.49	+194.9%	COM	337738108
ECL	Ecolab Inc.	104,983	$28,287	4.4%	$96.52	+161.4%	COM	278865100
ROL	Rollins, Inc.	456,900	$25,778	4.0%	$39.72	+40.2%	COM	775711104
AME	Ametek Inc.	139,686	$25,278	4.0%	$125.21	+36.8%	COM	031100100
AWK	Amer. Water Works	161,304	$22,439	3.5%	$136.66	+3.3%	COM	030420103
DOX	Amdocs Ltd.	245,901	$22,436	3.5%	$83.79	+4.7%	COM	G02602103
SCHW	Charles Schwab	240,963	$21,985	3.5%	$65.84	+26.3%	COM	808513105
DHR	Danaher Corp.	109,552	$21,641	3.4%	$170.27	+13.4%	COM	235851102
WSO	Watsco, Inc.	39,833	$17,591	2.8%	$356.62	+30.1%	COM	942622200
KAI	Kadant Inc.	55,175	$17,515	2.8%	$295.94	+5.4%	COM	48282T104
PGR	Progressive Corp.	64,255	$17,147	2.7%	$63.46	+305.8%	COM	743315103
FERG	Ferguson Enterprises	75,500	$16,440	2.6%	$194.48	-6.4%	COM	31488V107
ALSN	Allison Transmission	164,547	$15,630	2.5%	$38.61	+148.3%	COM	01973R101
FELE	Franklin Elec. Co., Inc.	173,991	$15,614	2.5%	$87.79	-1.1%	COM	353514102
DCI	Donaldson Co., Inc.	209,185	$14,507	2.3%	$72.11	-8.0%	COM	257651109
KRNT	Kornit Digital	637,300	$12,689	2.0%	$20.62	-3.3%	COM	M6372Q113
NXE	NexGen Energy Ltd.	1,237,000	$8,585	1.3%	$1.31	+331.1%	COM	65340P106
GRID	First Trust Cln Edge	46,900	$6,520	1.0%	$105.12	—	COM	33737A108
A	Agilent Tech, Inc.	55,200	$6,514	1.0%	$132.85	-16.9%	COM	00846U101
HEI	HEICO Corp.	19,550	$6,412	1.0%	$167.85	+64.8%	COM	422806109
MSFT	Microsoft Corp.	10,854	$5,399	0.8%	$90.57	+377.4%	COM	594918104
GNRC	Generac Holdings	19,650	$2,814	0.4%	$113.74	+7.3%	COM	368736104
ORA	Ormat Technologies	30,000	$2,513	0.4%	$68.71	+8.5%	COM	686688102
PHO	Invesco Water ETF	32,780	$2,292	0.4%	$53.35	—	COM	46137V142
AVTR	Avantor Inc.	131,000	$1,763	0.3%	$22.95	-40.4%	COM	05352A100
ROP	Roper Technologies	2,550	$1,445	0.2%	$268.84	+109.1%	COM	776696106
—	Enphase Energy, Inc.	13,600	$539	0.1%	$81.91	—	COM	29355a107
OCUL	Ocular Therapeutix	16,400	$152	0.0%	$6.19	+26.4%	COM	67576A100
SASKF	ATHA Energy Corp.	19,000	$8	0.0%	$0.77	-56.9%	COM	046824108