DUDLEY & SHANLEY, INC. Long-Term Concentrated

Location: Palm Beach, FL

CIK: 0000883511 · Show all filings

Period: Q4 2025 (← Previous) (Next →)

Filing Date: Jan 9, 2026

Total Value: $622M (100.0% shares, 0.0% debt)

Holdings (33)

WPM Wheaton Precious Mtls 12.6%

Value $78.57M Shares 668,605 Est. Cost $26.64 Unrealized +301.9%

APH Amphenol Corp. 6.1%

Value $38.23M Shares 282,911 Est. Cost $49.89 Unrealized +167.7%

V Visa Inc. 5.5%

Value $34.09M Shares 97,216 Est. Cost $208.01 Unrealized +63.6%

ADI Analog Devices 5.4%

Value $33.91M Shares 125,021 Est. Cost $184.36 Unrealized +35.9%

— Aon plc 5.0%

Value $31.33M Shares 88,782 Est. Cost $172.84 Unrealized —

AME Ametek Inc. 4.6%

Value $28.7M Shares 139,796 Est. Cost $125.21 Unrealized +55.2%

SCI Service Corp. Int'l 4.6%

Value $28.66M Shares 367,633 Est. Cost $38.46 Unrealized +108.0%

ECL Ecolab Inc. 4.4%

Value $27.58M Shares 105,058 Est. Cost $96.52 Unrealized +175.3%

ROL Rollins, Inc. 4.4%

Value $27.35M Shares 455,730 Est. Cost $39.72 Unrealized +47.7%

DHR Danaher Corp. 4.2%

Value $26.3M Shares 114,881 Est. Cost $171.58 Unrealized +28.0%

RYAN Ryan Specialty Hldngs 4.0%

Value $24.66M Shares 477,671 Est. Cost $38.70 Unrealized +41.7%

SCHW Charles Schwab 3.9%

Value $24.07M Shares 240,933 Est. Cost $65.84 Unrealized +43.9%

DCI Donaldson Co., Inc. 3.9%

Value $23.97M Shares 270,405 Est. Cost $72.73 Unrealized +18.8%

FERG Ferguson Enterprises 3.7%

Value $23.19M Shares 104,175 Est. Cost $206.45 Unrealized +15.3%

AWK Amer. Water Works 3.5%

Value $22.06M Shares 169,044 Est. Cost $136.82 Unrealized -2.7%

WSO Watsco, Inc. 3.0%

Value $18.77M Shares 55,692 Est. Cost $356.75 Unrealized +0.1%

ALSN Allison Transmission 2.6%

Value $16.11M Shares 164,597 Est. Cost $38.61 Unrealized +126.6%

KAI Kadant Inc. 2.5%

Value $15.71M Shares 55,120 Est. Cost $295.94 Unrealized -4.1%

PGR Progressive Corp. 2.4%

Value $15.09M Shares 66,280 Est. Cost $68.01 Unrealized +212.2%

BMI Badger Meter Inc 2.3%

Value $14.42M Shares 82,695 Est. Cost $179.79 Unrealized 0.0%

KRNT Kornit Digital 2.1%

Value $12.97M Shares 901,960 Est. Cost $18.83 Unrealized -27.2%

NXE NexGen Energy Ltd. 1.8%

Value $11.38M Shares 1,235,150 Est. Cost $1.31 Unrealized +574.3%

FISV Fiserv Inc. 1.6%

Value $9.667M Shares 143,923 Est. Cost $64.10 Unrealized +30.8%

ROP Roper Technologies 1.2%

Value $7.77M Shares 17,455 Est. Cost $433.92 Unrealized +6.5%

A Agilent Tech, Inc. 1.2%

Value $7.511M Shares 55,200 Est. Cost $132.85 Unrealized +8.2%

HEI HEICO Corp. 1.0%

Value $6.31M Shares 19,500 Est. Cost $167.85 Unrealized +88.3%

MSFT Microsoft Corp. 0.8%

Value $5.111M Shares 10,569 Est. Cost $90.57 Unrealized +452.7%

ORA Ormat Technologies 0.5%

Value $3.093M Shares 28,000 Est. Cost $68.71 Unrealized +59.1%

GNRC Generac Holdings 0.4%

Value $2.68M Shares 19,650 Est. Cost $113.74 Unrealized +41.9%

PHO Invesco Water ETF 0.4%

Value $2.308M Shares 32,780 Est. Cost $53.35 Unrealized —

VNOM Viper Energy Inc 0.0%

Value $297K Shares 7,700 Est. Cost $37.86 Unrealized 0.0%

FAST Fastenal Co. 0.0%

Value $287K Shares 7,150 Est. Cost $42.03 Unrealized 0.0%

STLNF Stallion Uranium Corp 0.0%

Value $20,155 Shares 85,000 Est. Cost $0.27 Unrealized —

Ticker	Issuer	Shares	Value	%	Est. Cost	Unrealized	Class	CUSIP
WPM	Wheaton Precious Mtls	668,605	$78.57M	12.6%	$26.64	+301.9%	COM	962879102
APH	Amphenol Corp.	282,911	$38.23M	6.1%	$49.89	+167.7%	COM	032095101
V	Visa Inc.	97,216	$34.09M	5.5%	$208.01	+63.6%	COM	92826C839
ADI	Analog Devices	125,021	$33.91M	5.4%	$184.36	+35.9%	COM	032654105
—	Aon plc	88,782	$31.33M	5.0%	$172.84	—	COM	g0403h108
AME	Ametek Inc.	139,796	$28.7M	4.6%	$125.21	+55.2%	COM	031100100
SCI	Service Corp. Int'l	367,633	$28.66M	4.6%	$38.46	+108.0%	COM	817565104
ECL	Ecolab Inc.	105,058	$27.58M	4.4%	$96.52	+175.3%	COM	278865100
ROL	Rollins, Inc.	455,730	$27.35M	4.4%	$39.72	+47.7%	COM	775711104
DHR	Danaher Corp.	114,881	$26.3M	4.2%	$171.58	+28.0%	COM	235851102
RYAN	Ryan Specialty Hldngs	477,671	$24.66M	4.0%	$38.70	+41.7%	COM	78351F107
SCHW	Charles Schwab	240,933	$24.07M	3.9%	$65.84	+43.9%	COM	808513105
DCI	Donaldson Co., Inc.	270,405	$23.97M	3.9%	$72.73	+18.8%	COM	257651109
FERG	Ferguson Enterprises	104,175	$23.19M	3.7%	$206.45	+15.3%	COM	31488V107
AWK	Amer. Water Works	169,044	$22.06M	3.5%	$136.82	-2.7%	COM	030420103
WSO	Watsco, Inc.	55,692	$18.77M	3.0%	$356.75	+0.1%	COM	942622200
ALSN	Allison Transmission	164,597	$16.11M	2.6%	$38.61	+126.6%	COM	01973R101
KAI	Kadant Inc.	55,120	$15.71M	2.5%	$295.94	-4.1%	COM	48282T104
PGR	Progressive Corp.	66,280	$15.09M	2.4%	$68.01	+212.2%	COM	743315103
BMI	Badger Meter Inc	82,695	$14.42M	2.3%	$179.79	0.0%	COM	056525108
KRNT	Kornit Digital	901,960	$12.97M	2.1%	$18.83	-27.2%	COM	M6372Q113
NXE	NexGen Energy Ltd.	1,235,150	$11.38M	1.8%	$1.31	+574.3%	COM	65340P106
FISV	Fiserv Inc.	143,923	$9.667M	1.6%	$64.10	+30.8%	COM	337738108
ROP	Roper Technologies	17,455	$7.77M	1.2%	$433.92	+6.5%	COM	776696106
A	Agilent Tech, Inc.	55,200	$7.511M	1.2%	$132.85	+8.2%	COM	00846U101
HEI	HEICO Corp.	19,500	$6.31M	1.0%	$167.85	+88.3%	COM	422806109
MSFT	Microsoft Corp.	10,569	$5.111M	0.8%	$90.57	+452.7%	COM	594918104
ORA	Ormat Technologies	28,000	$3.093M	0.5%	$68.71	+59.1%	COM	686688102
GNRC	Generac Holdings	19,650	$2.68M	0.4%	$113.74	+41.9%	COM	368736104
PHO	Invesco Water ETF	32,780	$2.308M	0.4%	$53.35	—	COM	46137V142
VNOM	Viper Energy Inc	7,700	$297K	0.0%	$37.86	0.0%	COM	64361Q101
FAST	Fastenal Co.	7,150	$287K	0.0%	$42.03	0.0%	COM	311900104
STLNF	Stallion Uranium Corp	85,000	$20,155	0.0%	$0.27	—	COM	852919208