Latest DUDLEY & SHANLEY, INC. Stock Portfolio

$629Million | No. of Holdings #36

DUDLEY & SHANLEY, INC. Performance

2026 Q3-4.78%

YTD-2.48%

2025+11.02%

About DUDLEY & SHANLEY, INC. and 13F Hedge Fund Stock Holdings

DUDLEY & SHANLEY, INC. is a hedge fund based in Palm Beach, FL. On 2026-10-06, the fund reported it's updated stock portfolio. In the 13F Holdings report, DUDLEY & SHANLEY, INC. reported an equity portfolio of $629.2 Millions as of 30 Sep, 2026. <br><br> The top stock holdings of DUDLEY & SHANLEY, INC. are WPM, AME, V. The fund has invested 9% of it's portfolio in WHEATON PRECIOUS MTLS and 5% of portfolio in AMETEK INC. <br><br> The fund managers got completely rid off ROLLINS, INC. (ROL) and STALLION URANIUM CORP stocks. They significantly reduced their stock positions in FISERV INC., WATSCO, INC. (WSO) and VISA INC. (V). DUDLEY & SHANLEY, INC. opened new stock positions in TYLER TECHNOLOGIES (TYL). The fund showed a lot of confidence in some stocks as they added substantially to ROPER TECHNOLOGIES (ROP), ATHA ENERGY CORP. and PROGRESSIVE CORP. (PGR).

DUDLEY & SHANLEY, INC. Equity Portfolio Value

Last Reported on: 06 Oct, 2026

$629Million

as of Oct 06, 2026

DUDLEY & SHANLEY, INC. Annual Return Estimates Vs S&P 500

Our best estimate is that DUDLEY & SHANLEY, INC. made a return of -4.78% in the last quarter. In trailing 12 months, it's portfolio return was -2.29%.

Performance
S&P 500

New Buys

Ticker	$ Bought
tyler technologies	20,517,800

New stocks bought by DUDLEY & SHANLEY, INC.

Additions

Ticker	% Inc.
roper technologies	2,766
atha energy corp.	58.39
progressive corp.	57.14
badger meter inc	34.29
amphenol corp.	31.3
allison transmission	6.2
federal signal corp	2.81
ryan specialty hldngs	0.16

Additions to existing portfolio by DUDLEY & SHANLEY, INC.

Reductions

Ticker	% Reduced
fiserv inc.	-43.51
watsco, inc.	-33.9
visa inc.	-12.94
charles schwab	-12.02
ametek inc.	-8.94
wheaton precious mtls	-7.31
agilent tech, inc.	-7.12
kornit digital	-6.91

DUDLEY & SHANLEY, INC. reduced stake in above stock

Sold off

Ticker	$ Sold
rollins, inc.	-20,688,600
stallion uranium corp	-25,377

DUDLEY & SHANLEY, INC. got rid off the above stocks

Sector Distribution

DUDLEY & SHANLEY, INC. has about 24.9% of it's holdings in Industrials sector.

Industrials
Financial Services
Others
Technology
Consumer Cyclical
Healthcare
Basic Materials
Utilities

Sector	%
Industrials	24.9
Financial Services	18
Others	17.9
Technology	17.2
Consumer Cyclical	7.3
Healthcare	6.7
Basic Materials	4.3
Utilities	3.7

Market Cap. Distribution

DUDLEY & SHANLEY, INC. has about 68.1% of it's portfolio invested in the large-cap and mega-cap stocks.

LARGE-CAP
UNALLOCATED
MID-CAP
MEGA-CAP

Category	%
LARGE-CAP	62.4
UNALLOCATED	17.9
MID-CAP	14
MEGA-CAP	5.7

Stocks belong to which Index?

About 65.1% of the stocks held by DUDLEY & SHANLEY, INC. either belong to S&P 500 or RUSSELL 2000 index.

S&P 500
Others
RUSSELL 2000

Index	%
S&P 500	57
Others	34.9
RUSSELL 2000	8.1

Top 5 Winners (%)		%
MSFT	microsoft corp.	37.5 %
A	agilent tech, inc.	28.7 %
PFE	pfizer, inc.	18.4 %
WPM	wheaton precious mtls	18.4 %
WAT	waters corporation	17.2 %

Top 5 Winners ($)		$
WPM	wheaton precious mtls	9.4 M
A	agilent tech, inc.	2.6 M
DHR	danaher corp.	2.3 M
WAT	waters corporation	1.5 M
MSFT	microsoft corp.	1.5 M

Top 5 Losers (%)		%
APH	amphenol corp.	-49.0 %
GNRC	generac holdings	-29.3 %
WSO	watsco, inc.	-22.7 %
KAI	kadant inc.	-16.4 %
AON	aon plc	-16.2 %

Top 5 Losers ($)		$
APH	amphenol corp.	-25.0 M
WSO	watsco, inc.	-7.4 M
AON	aon plc	-4.8 M
KAI	kadant inc.	-3.9 M
FSS	federal signal corp	-3.0 M

DUDLEY & SHANLEY, INC. Holdings Map

This heatmap illustrates the top 50 positions within the fund's portfolio.

Current Stock Holdings of DUDLEY & SHANLEY, INC.

DUDLEY & SHANLEY, INC. has 36 stocks in it's portfolio. About 46.4% of the portfolio is in top 10 stocks. APH proved to be the most loss making stock for the portfolio. WPM was the most profitable stock for DUDLEY & SHANLEY, INC. last quarter.

$629.16MTotal Value

38.00Positions

06 Oct, 2026Last Reported

Current holdings of Current Stock Holdings of DUDLEY & SHANLEY, INC., last reported on 06 Oct, 2026. Select a row with a linked ticker to view its historical trend.
Holdingsorted ascending	% Portfolio	Shares Held	$ Value	% Change
A Agilent Tech, Inc. Agilent Tech, Inc.A DUDLEY & SHANLEY, INC.'s holding in Agilent Tech, Inc. over time	1.77%	64,550	$11.12M 1.77%	decreased 7.12 percentreduced

ADI Analog Devices Analog DevicesADI DUDLEY & SHANLEY, INC.'s holding in Analog Devices over time	4.08%	64,639	$25.64M 4.08%	decreased 3.81 percentreduced

ALSN Allison Transmission Allison TransmissionALSN DUDLEY & SHANLEY, INC.'s holding in Allison Transmission over time	3.15%	175,274	$19.85M 3.15%	increased 6.2 percentadded

AME Ametek Inc. Ametek Inc.AME DUDLEY & SHANLEY, INC.'s holding in Ametek Inc. over time	5.01%	127,243	$31.52M 5.01%	decreased 8.94 percentreduced

AON Aon Plc Aon PlcAON DUDLEY & SHANLEY, INC.'s holding in Aon Plc over time	3.75%	85,202	$23.58M 3.75%	decreased 4.06 percentreduced

APH Amphenol Corp. Amphenol Corp.APH DUDLEY & SHANLEY, INC.'s holding in Amphenol Corp. over time	4.12%	307,828	$25.95M 4.12%	increased 31.3 percentadded

AWK Amer. Water Works Amer. Water WorksAWK DUDLEY & SHANLEY, INC.'s holding in Amer. Water Works over time	3.3%	160,550	$20.79M 3.3%	decreased 5.19 percentreduced

BMI Badger Meter Inc Badger Meter IncBMI DUDLEY & SHANLEY, INC.'s holding in Badger Meter Inc over time	1.66%	84,600	$10.45M 1.66%	increased 34.29 percentadded

DCI Donaldson Co., Inc. Donaldson Co., Inc.DCI DUDLEY & SHANLEY, INC.'s holding in Donaldson Co., Inc. over time	3.6%	260,170	$22.65M 3.6%	decreased 4.47 percentreduced

DHR Danaher Corp. Danaher Corp.DHR DUDLEY & SHANLEY, INC.'s holding in Danaher Corp. over time	2.51%	71,195	$15.77M 2.51%	decreased 3.82 percentreduced

ECL Ecolab Inc. Ecolab Inc.ECL DUDLEY & SHANLEY, INC.'s holding in Ecolab Inc. over time	4.32%	99,043	$27.20M 4.32%	decreased 5.4 percentreduced

FAST Fastenal Co. Fastenal Co.FAST DUDLEY & SHANLEY, INC.'s holding in Fastenal Co. over time	3.58%	454,940	$22.53M 3.58%	decreased 3.7 percentreduced

FSS Federal Signal Corp Federal Signal CorpFSS DUDLEY & SHANLEY, INC.'s holding in Federal Signal Corp over time	3.06%	174,050	$19.28M 3.06%	increased 2.81 percentadded

GNRC Generac Holdings Generac HoldingsGNRC DUDLEY & SHANLEY, INC.'s holding in Generac Holdings over time	0.53%	16,150	$3.34M 0.53%	unchanged 0 percentunchanged

HEI Heico Corp. Heico Corp.HEI DUDLEY & SHANLEY, INC.'s holding in Heico Corp. over time	0.92%	19,000	$5.76M 0.92%	decreased 2.56 percentreduced

KAI Kadant Inc. Kadant Inc.KAI DUDLEY & SHANLEY, INC.'s holding in Kadant Inc. over time	3.02%	72,782	$19.03M 3.02%	decreased 3.9 percentreduced

KRNT Kornit Digital Kornit Digital KRNT DUDLEY & SHANLEY, INC.'s holding in Kornit Digital over time	3.09%	1,168,540	$19.42M 3.09%	decreased 6.91 percentreduced

MSFT Microsoft Corp. Microsoft Corp.MSFT DUDLEY & SHANLEY, INC.'s holding in Microsoft Corp. over time	0.86%	10,569	$5.42M 0.86%	unchanged 0 percentunchanged

NXE Nexgen Energy Ltd. Nexgen Energy Ltd. NXE DUDLEY & SHANLEY, INC.'s holding in Nexgen Energy Ltd. over time	1.78%	1,225,500	$11.20M 1.78%	unchanged 0 percentunchanged

ORA Ormat Technologies Ormat TechnologiesORA DUDLEY & SHANLEY, INC.'s holding in Ormat Technologies over time	0.38%	26,100	$2.39M 0.38%	unchanged 0 percentunchanged