Stocks/Funds/CIK 883511

DUDLEY & SHANLEY, INC.

long-term holder
Quarterly 13F filings · Latest period 2026-03-31 · CIK 883511
Assets
$611M
-3.8% YoY
Holdings
37
Lifetime alpha vs market
-0.15% annual
Average hold time
4.6 yr
median 4.3 yr

Quarterly history

Cum return +51% vs S&P +52% · α -1% lifetimeAUM $611M · peak $648MFlow $-8M (-1%)2016-032017-092019-062020-122022-062023-122025-062026-03
AUM ($B)fundS&P 500(gap = α)/ Flow in/out

Behavior signals (lifetime)

Dip response
-5.91%
trims when stocks drop
when a holding falls −10%+
Middle response
+0.01%
steady accumulation
Rally response
-3.80%
trims into rallies
when a holding rises +10%+

Top positions · 30

Ticker$ value% portYoYHold time
WPMWheaton Precious Metals $60M9.8%+70.0%6.8 yr
APHAmphenol Corporation$31M5.1%+93.6%4.3 yr
SCIService Corporation Inte$30M5.0%+4.6%10.3 yr
ADIAnalog Devices, Inc.$30M5.0%+60.2%5.3 yr
AMEAMETEK, Inc.$30M4.9%+25.3%8.0 yr
VVisa Inc.$29M4.8%-13.1%6.3 yr
$29M4.7%6.3 yr
ECLEcolab Inc.$28M4.6%+6.0%10.3 yr
ROLRollins, Inc.$24M4.0%+0.0%3.0 yr
FERGFerguson plc$24M4.0%+47.8%1.5 yr
AWKAmerican Water Works Com$23M3.8%-5.4%3.3 yr
DCIDonaldson Company, Inc.$23M3.8%+28.4%2.3 yr
SCHWThe Charles Schwab Corpo$23M3.7%+21.5%2.3 yr
KAIKadant Inc.$22M3.6%-12.8%4.3 yr
DHRDanaher Corporation$22M3.6%-7.1%6.3 yr

Portfolio composition (YoY)

Industry mix
Industrial - Machinery12.6%+4.3pp$77M
Gold9.8%-2.5pp$60M
Personal Products & Services8.9%+0.4pp$55M
Industrial - Distribution8.7%+4.1pp$53M
Hardware, Equipment & Parts8.1%+3.6pp$50M
Medical - Diagnostics & Research5.2%+0.7pp$32M
Semiconductors5.0%+1.1pp$30M
Electrical Equipment & Parts4.9%+1.1pp$30M
Financial - Credit Services4.8%-0.6pp$29M
Unknown4.7%-0.9pp$29M
Country
US76.1%-1.5pp
CA12.2%-1.1pp
Unknown4.7%-0.9pp
GB4.0%+1.4pp
IL3.0%+2.0pp
Top 5: 29.7% · Top 10: 51.8% · Top 25: 94.1%

Winners

TickerPrev $PnLYoY %
WPM$78M+0.05B70.0%
APH$29M+0.03B93.6%
ADI$25M+0.01B60.2%
NXE$6M+0.01B158.4%
FERG$16M+0.01B47.8%

Losers

TickerPrev $PnLYoY %
RYAN$34M-0.02B-53.9%
PGR$24M-0.01B-25.5%
V$34M-0.00B-13.1%
WSO$13M-0.00B-26.4%
DHR$22M-0.00B-7.1%

Top buys this quarter · 9

XYL Xylem Inc.new+$10M
FAST Fastenal Company+$8M
FSS Federal Signal Corporationnew+$7M
KAI Kadant Inc.+$6M
BMI Badger Meter, Inc.+$6M
KRNT Kornit Digital Ltd.+$5M
RYAN Ryan Specialty Holdings, Inc.+$16M
+$0M
+$0M

Top sells this quarter · 9

WAT Waters Corporation$31M
WPM Wheaton Precious Metals Corp.$27M
ADI Analog Devices, Inc.$10M
ROP Roper Technologies, Inc.$5M
APH Amphenol Corporation$5M
NXE NexGen Energy Ltd.$11M
V Visa Inc.$0M
ECL Ecolab Inc.$28M
AME AMETEK, Inc.$29M

Quarterly history (TTM returns)

PeriodAUM# PosReturn (1yr)SPY (1yr)Alpha (1yr)Flow
2026-03-31$611M37+14.02%+17.59%-3.57%-0.01B
2025-12-31$622M33+19.25%+17.72%+1.54%-0.01B
2025-09-30$622M32+12.85%+17.52%-4.67%-0.04B
2025-06-30$637M36+18.53%+14.94%+3.59%-0.05B
2025-03-31$635M36+10.11%+8.30%+1.80%-0.04B
2024-12-31$648M37+13.68%+24.89%-11.21%+0.03B
2024-09-30$640M36+28.90%+36.04%-7.13%+0.00B
2024-06-30$582M36+10.97%+24.49%-13.52%-0.01B
2024-03-31$593M36+13.51%+29.62%-16.11%-0.01B
2023-12-31$561M34+13.87%+26.18%-12.31%-0.02B
2023-09-30$529M36+19.58%+21.57%-1.98%+0.01B
2023-06-30$554M37+19.75%+19.42%+0.33%+0.02B
2023-03-31$521M36+6.16%-7.82%+13.97%+0.04B
2022-12-31$444M33+15.46%+7.56%+7.90%+0.03B
2022-09-30$357M27-5.72%-4.93%-0.79%-0.06B
2022-06-30$446M33-9.50%-16.11%+6.61%-0.04B