DUDLEY & SHANLEY, INC. Concentrated Active

Location: Palm Beach, FL

CIK: 0000883511 · Show all filings

Period: Q1 2026 (← Previous) (Next →)

Filing Date: Apr 8, 2026

Total Value: $611M (100.0% shares, 0.0% debt)

Holdings (37)

WPM Wheaton Precious Mtls 9.8%

Value $60.18M Shares 459,385 Share Price $131.01 Est. Cost/Share $26.64 Unrealized @ Report Date +391.7%

APH Amphenol Corp. 5.1%

Value $31.05M Shares 245,751 Share Price $126.35 Est. Cost/Share $49.89 Unrealized @ Report Date +153.3%

SCI Service Corp. Int'l 5.0%

Value $30.33M Shares 367,633 Share Price $82.51 Est. Cost/Share $38.46 Unrealized @ Report Date +114.6%

ADI Analog Devices 5.0%

Value $30.26M Shares 95,121 Share Price $318.14 Est. Cost/Share $184.36 Unrealized @ Report Date +72.6%

AME Ametek Inc. 4.9%

Value $29.96M Shares 139,746 Share Price $214.36 Est. Cost/Share $125.21 Unrealized @ Report Date +71.2%

V Visa Inc. 4.8%

Value $29.37M Shares 97,166 Share Price $302.24 Est. Cost/Share $208.01 Unrealized @ Report Date +45.3%

— Aon plc 4.7%

Value $28.66M Shares 88,782 Share Price $322.78 Est. Cost/Share $172.84 Unrealized @ Report Date —

ECL Ecolab Inc. 4.6%

Value $27.93M Shares 105,008 Share Price $266.02 Est. Cost/Share $96.52 Unrealized @ Report Date +175.6%

ROL Rollins, Inc. 4.0%

Value $24.34M Shares 455,730 Share Price $53.41 Est. Cost/Share $39.72 Unrealized @ Report Date +34.5%

FERG Ferguson Enterprises 4.0%

Value $24.3M Shares 104,175 Share Price $233.26 Est. Cost/Share $206.45 Unrealized @ Report Date +13.0%

AWK Amer. Water Works 3.8%

Value $23.01M Shares 169,044 Share Price $136.09 Est. Cost/Share $136.82 Unrealized @ Report Date -0.5%

DCI Donaldson Co., Inc. 3.8%

Value $22.95M Shares 270,405 Share Price $84.87 Est. Cost/Share $72.73 Unrealized @ Report Date +16.7%

SCHW Charles Schwab 3.7%

Value $22.64M Shares 240,933 Share Price $93.98 Est. Cost/Share $65.84 Unrealized @ Report Date +42.7%

KAI Kadant Inc. 3.6%

Value $22.14M Shares 75,735 Share Price $292.35 Est. Cost/Share $302.84 Unrealized @ Report Date -3.5%

DHR Danaher Corp. 3.6%

Value $21.78M Shares 114,881 Share Price $189.60 Est. Cost/Share $171.58 Unrealized @ Report Date +10.5%

WSO Watsco, Inc. 3.3%

Value $20.26M Shares 55,692 Share Price $363.79 Est. Cost/Share $356.75 Unrealized @ Report Date +2.0%

ALSN Allison Transmission 3.2%

Value $19.27M Shares 164,597 Share Price $117.06 Est. Cost/Share $38.61 Unrealized @ Report Date +203.2%

BMI Badger Meter Inc 3.0%

Value $18.61M Shares 122,150 Share Price $152.35 Est. Cost/Share $172.42 Unrealized @ Report Date -11.6%

KRNT Kornit Digital 3.0%

Value $18.39M Shares 1,254,615 Share Price $14.66 Est. Cost/Share $17.65 Unrealized @ Report Date -16.9%

RYAN Ryan Specialty Hldngs 2.6%

Value $16.2M Shares 480,021 Share Price $33.74 Est. Cost/Share $38.70 Unrealized @ Report Date -12.8%

NXE NexGen Energy Ltd. 2.3%

Value $14.2M Shares 1,224,500 Share Price $11.60 Est. Cost/Share $1.31 Unrealized @ Report Date +785.9%

PGR Progressive Corp. 2.1%

Value $13.14M Shares 66,280 Share Price $198.24 Est. Cost/Share $68.01 Unrealized @ Report Date +191.5%

XYL Xylem Inc. 1.6%

Value $9.659M Shares 80,830 Share Price $119.50 Est. Cost/Share $131.09 Unrealized @ Report Date -8.8%

FAST Fastenal Co. 1.4%

Value $8.41M Shares 181,250 Share Price $46.40 Est. Cost/Share $44.69 Unrealized @ Report Date +3.8%

FISV Fiserv Inc. 1.3%

Value $8.031M Shares 143,923 Share Price $55.80 Est. Cost/Share $64.10 Unrealized @ Report Date -12.9%

FSS Federal Signal Corp 1.1%

Value $6.784M Shares 62,730 Share Price $108.14 Est. Cost/Share $113.09 Unrealized @ Report Date -4.4%

A Agilent Tech, Inc. 1.0%

Value $6.292M Shares 55,200 Share Price $113.98 Est. Cost/Share $132.85 Unrealized @ Report Date -14.2%

HEI HEICO Corp. 0.9%

Value $5.347M Shares 19,500 Share Price $274.20 Est. Cost/Share $167.85 Unrealized @ Report Date +63.4%

MSFT Microsoft Corp. 0.6%

Value $3.912M Shares 10,569 Share Price $370.17 Est. Cost/Share $90.57 Unrealized @ Report Date +308.7%

GNRC Generac Holdings 0.6%

Value $3.838M Shares 19,650 Share Price $195.33 Est. Cost/Share $113.74 Unrealized @ Report Date +71.7%

WAT Waters Corporation 0.6%

Value $3.49M Shares 11,720 Share Price $297.80 Est. Cost/Share $342.06 Unrealized @ Report Date -12.9%

ORA Ormat Technologies 0.5%

Value $3.134M Shares 28,000 Share Price $111.92 Est. Cost/Share $68.71 Unrealized @ Report Date +62.9%

PHO Invesco Water ETF 0.4%

Value $2.192M Shares 32,780 Share Price $66.86 Est. Cost/Share $52.99 Unrealized @ Report Date +26.2%

ROP Roper Technologies 0.1%

Value $708K Shares 2,000 Share Price $353.86 Est. Cost/Share $433.92 Unrealized @ Report Date -18.5%

VNOM Viper Energy Inc 0.1%

Value $362K Shares 7,700 Share Price $46.99 Est. Cost/Share $37.86 Unrealized @ Report Date +24.1%

STLNF Stallion Uranium Corp 0.0%

Value $60,628 Shares 180,000 Share Price $0.34 Est. Cost/Share $0.30 Unrealized @ Report Date —

SASKF ATHA Energy Corp. 0.0%

Value $43,779 Shares 74,500 Share Price $0.59 Est. Cost/Share $0.61 Unrealized @ Report Date -5.6%

Ticker	Issuer	Shares	Value	%	Share Price	Est. Cost/Share	Unrealized @ Report Date	Class	CUSIP
WPM	Wheaton Precious Mtls	459,385	$60.18M	9.8%	$131.01	$26.64	+391.7%	COM	962879102
APH	Amphenol Corp.	245,751	$31.05M	5.1%	$126.35	$49.89	+153.3%	COM	032095101
SCI	Service Corp. Int'l	367,633	$30.33M	5.0%	$82.51	$38.46	+114.6%	COM	817565104
ADI	Analog Devices	95,121	$30.26M	5.0%	$318.14	$184.36	+72.6%	COM	032654105
AME	Ametek Inc.	139,746	$29.96M	4.9%	$214.36	$125.21	+71.2%	COM	031100100
V	Visa Inc.	97,166	$29.37M	4.8%	$302.24	$208.01	+45.3%	COM	92826C839
—	Aon plc	88,782	$28.66M	4.7%	$322.78	$172.84	—	COM	g0403h108
ECL	Ecolab Inc.	105,008	$27.93M	4.6%	$266.02	$96.52	+175.6%	COM	278865100
ROL	Rollins, Inc.	455,730	$24.34M	4.0%	$53.41	$39.72	+34.5%	COM	775711104
FERG	Ferguson Enterprises	104,175	$24.3M	4.0%	$233.26	$206.45	+13.0%	COM	31488V107
AWK	Amer. Water Works	169,044	$23.01M	3.8%	$136.09	$136.82	-0.5%	COM	030420103
DCI	Donaldson Co., Inc.	270,405	$22.95M	3.8%	$84.87	$72.73	+16.7%	COM	257651109
SCHW	Charles Schwab	240,933	$22.64M	3.7%	$93.98	$65.84	+42.7%	COM	808513105
KAI	Kadant Inc.	75,735	$22.14M	3.6%	$292.35	$302.84	-3.5%	COM	48282T104
DHR	Danaher Corp.	114,881	$21.78M	3.6%	$189.60	$171.58	+10.5%	COM	235851102
WSO	Watsco, Inc.	55,692	$20.26M	3.3%	$363.79	$356.75	+2.0%	COM	942622200
ALSN	Allison Transmission	164,597	$19.27M	3.2%	$117.06	$38.61	+203.2%	COM	01973R101
BMI	Badger Meter Inc	122,150	$18.61M	3.0%	$152.35	$172.42	-11.6%	COM	056525108
KRNT	Kornit Digital	1,254,615	$18.39M	3.0%	$14.66	$17.65	-16.9%	COM	M6372Q113
RYAN	Ryan Specialty Hldngs	480,021	$16.2M	2.6%	$33.74	$38.70	-12.8%	COM	78351F107
NXE	NexGen Energy Ltd.	1,224,500	$14.2M	2.3%	$11.60	$1.31	+785.9%	COM	65340P106
PGR	Progressive Corp.	66,280	$13.14M	2.1%	$198.24	$68.01	+191.5%	COM	743315103
XYL	Xylem Inc.	80,830	$9.659M	1.6%	$119.50	$131.09	-8.8%	COM	98419M100
FAST	Fastenal Co.	181,250	$8.41M	1.4%	$46.40	$44.69	+3.8%	COM	311900104
FISV	Fiserv Inc.	143,923	$8.031M	1.3%	$55.80	$64.10	-12.9%	COM	337738108
FSS	Federal Signal Corp	62,730	$6.784M	1.1%	$108.14	$113.09	-4.4%	COM	313855108
A	Agilent Tech, Inc.	55,200	$6.292M	1.0%	$113.98	$132.85	-14.2%	COM	00846U101
HEI	HEICO Corp.	19,500	$5.347M	0.9%	$274.20	$167.85	+63.4%	COM	422806109
MSFT	Microsoft Corp.	10,569	$3.912M	0.6%	$370.17	$90.57	+308.7%	COM	594918104
GNRC	Generac Holdings	19,650	$3.838M	0.6%	$195.33	$113.74	+71.7%	COM	368736104
WAT	Waters Corporation	11,720	$3.49M	0.6%	$297.80	$342.06	-12.9%	COM	941848103
ORA	Ormat Technologies	28,000	$3.134M	0.5%	$111.92	$68.71	+62.9%	COM	686688102
PHO	Invesco Water ETF	32,780	$2.192M	0.4%	$66.86	$52.99	+26.2%	COM	46137V142
ROP	Roper Technologies	2,000	$708K	0.1%	$353.86	$433.92	-18.5%	COM	776696106
VNOM	Viper Energy Inc	7,700	$362K	0.1%	$46.99	$37.86	+24.1%	COM	64361Q101
STLNF	Stallion Uranium Corp	180,000	$60,628	0.0%	$0.34	$0.30	—	COM	852919208
SASKF	ATHA Energy Corp.	74,500	$43,779	0.0%	$0.59	$0.61	-5.6%	COM	046824108