Latest DUDLEY & SHANLEY, INC. Stock Portfolio

DUDLEY & SHANLEY, INC. Performance:

2025 Q4: 0.19%YTD: 11.02%2024: 11.35%

Performance for 2025 Q4 is 0.19%, and YTD is 11.02%, and 2024 is 11.35%.

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

DUDLEY & SHANLEY, INC. is a hedge fund based in PALM BEACH, FL. On 17-Mar-2023, the fund reported that it had an AUM (Regulated Assets under Management) of $610.8 Millions. In it's latest 13F Holdings report, DUDLEY & SHANLEY, INC. reported an equity portfolio of $622.2 Millions as of 31 Dec, 2025.

The top stock holdings of DUDLEY & SHANLEY, INC. are , APH, V. The fund has invested 12.6% of it's portfolio in WHEATON PRECIOUS MTLS and 6.1% of portfolio in AMPHENOL CORP.

The fund managers got completely rid off AMDOCS LTD. and OCULAR THERAPEUTIX (OCUL) stocks. They significantly reduced their stock positions in KORNIT DIGITAL, AMPHENOL CORP. (APH) and ORMAT TECHNOLOGIES (ORA). DUDLEY & SHANLEY, INC. opened new stock positions in BADGER METER INC (BMI), VIPER ENERGY INC and FASTENAL CO. (FAST). The fund showed a lot of confidence in some stocks as they added substantially to ROPER TECHNOLOGIES (ROP), STALLION URANIUM CORP and WATSCO, INC. (WSO).

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

Our best estimate is that DUDLEY & SHANLEY, INC. made a return of 0.19% in the last quarter. In trailing 12 months, it's portfolio return was 11.02%.

Performance
S&P 500

New Buys

Ticker	$ Bought
badger meter inc	14,422,800
viper energy inc	297,451
fastenal co.	286,929

New stocks bought by DUDLEY & SHANLEY, INC.

Additions

Ticker	% Inc.
roper technologies	584
stallion uranium corp	183
watsco, inc.	41.46
ferguson enterprises	37.98
ryan specialty hldngs	3.41
progressive corp.	3.15
ecolab inc.	0.07
aon plc	0.06

Additions to existing portfolio by DUDLEY & SHANLEY, INC.

Reductions

Ticker	% Reduced
kornit digital	-28.35
fiserv inc.	-17.72
amphenol corp.	-10.64
ormat technologies	-7.28
wheaton precious mtls	-3.89
microsoft corp.	-2.63
service corp. int'l	-0.49
kadant inc.	-0.1

DUDLEY & SHANLEY, INC. reduced stake in above stock

Sold off

Ticker	$ Sold
amdocs ltd.	-20,228,500
ocular therapeutix	-151,970

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

Sector Distribution

DUDLEY & SHANLEY, INC. has about 22.2% of it's holdings in Others sector.

Sector	%
Others	22.2
Financial Services	20.8
Technology	16
Industrials	15.5
Consumer Cyclical	11.6
Healthcare	5.4
Basic Materials	4.4
Utilities	4

Market Cap. Distribution

DUDLEY & SHANLEY, INC. has about 65.5% of it's portfolio invested in the large-cap and mega-cap stocks.

Category	%
LARGE-CAP	59.2
UNALLOCATED	22.2
MID-CAP	12.2
MEGA-CAP	6.3

Stocks belong to which Index?

About 58.7% of the stocks held by DUDLEY & SHANLEY, INC. either belong to S&P 500 or RUSSELL 2000 index.

Index	%
S&P 500	53.4
Others	41.3
RUSSELL 2000	5.3

Top 5 Winners (%)		%
DHR	danaher corp.	15.5 %
ALSN	allison transmission	15.3 %
ORA	ormat technologies	14.2 %
ADI	analog devices	10.4 %
AME	ametek inc.	9.2 %

Top 5 Winners ($)		$
	wheaton precious mtls	3.9 M
DHR	danaher corp.	3.5 M
APH	amphenol corp.	3.4 M
ADI	analog devices	3.2 M
AME	ametek inc.	2.4 M

Top 5 Losers (%)		%
	fiserv inc.	-43.7 %
	stallion uranium corp	-19.1 %
GNRC	generac holdings	-18.5 %
WSO	watsco, inc.	-14.6 %
RYAN	ryan specialty hldngs	-8.3 %

Top 5 Losers ($)		$
	fiserv inc.	-9.8 M
WSO	watsco, inc.	-3.2 M
RYAN	ryan specialty hldngs	-2.2 M
SCI	service corp. int'l	-1.9 M
AWK	amer. water works	-1.5 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 33 stocks in it's portfolio. About 57% of the portfolio is in top 10 stocks. proved to be the most loss making stock for the portfolio. was the most profitable stock for DUDLEY & SHANLEY, INC. last quarter.

Last Reported on: 09 Jan, 2026

Ticker	Namesorted ascending	% Portfolio	Shares Held	$ Value	Type	% Change
A	agilent tech, inc.	1.21	55,200	7,511,060	unchanged	0.00

ADI	analog devices	5.45	125,021	33,905,700	added	0.02

ALSN	allison transmission	2.59	164,597	16,114,000	added	0.03

AME	ametek inc.	4.61	139,796	28,701,500	added	0.01

AON	aon plc	5.04	88,782	31,329,400	added	0.06

APH	amphenol corp.	6.14	282,911	38,232,600	reduced	-10.64

AWK	amer. water works	3.54	169,044	22,060,200	reduced	-0.07

BMI	badger meter inc	2.32	82,695	14,422,800	new

CSD	invesco water etf	0.37	32,780	2,308,020	unchanged	0.00

DCI	donaldson co., inc.	3.85	270,405	23,974,100	reduced	-0.07

DHR	danaher corp.	4.23	114,881	26,298,600	reduced	-0.05

ECL	ecolab inc.	4.43	105,058	27,579,800	added	0.07

FAST	fastenal co.	0.05	7,150	286,929	new

GNRC	generac holdings	0.43	19,650	2,679,670	unchanged	0.00

HEI	heico corp.	1.01	19,500	6,310,000	unchanged	0.00

KAI	kadant inc.	2.52	55,120	15,710,300	reduced	-0.1

MSFT	microsoft corp.	0.82	10,569	5,111,380	reduced	-2.63

OCUL	ocular therapeutix	0.00	0.00	0.00	sold off	-100

ORA	ormat technologies	0.50	28,000	3,093,160	reduced	-7.28

PGR	progressive corp.	2.43	66,280	15,093,300	added	3.15