2026 Q2 Portfolio Activity
In 2026 Q2, DUDLEY & SHANLEY, INC. maintained a portfolio of 38 distinct positions. The most significant new addition was Pfizer, Inc., now representing 0.60% of the total fund value. They heavily accumulated shares in Federal Signal Corp, increasing the position by 169.9%. The fund also reduced its exposure to Badger Meter Inc by 48.4%.
Position History
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Total Positions
38
Quarter
2026 Q2
Top Holding
WPM (7.7%)
Top 10 Concentration
49.8%
Turnover Rate
23.4%
Sector HHI
0.18
Items per page:
Showing 1-38 of 38
DUDLEY & SHANLEY, INC. Full Holdings List — 2026 Q2
| Stock | History | Sector / Type | Port % | Prev % | Rank / Prev | Conviction | Change | % Change | Influence | Shares | Mkt Value | Avg Cost | Price Held | 1st Owned | Source | Source Date | Date Reported | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
WPM
Wheaton Preciou...
|
Basic Materials | 7.71% | 9.85% |
#1
Prev: #1
|
5.6 |
—
|
-4,745 | -1.0% |
P
S
|
454,640 | $51,065,165 |
$25.85
+325.7%
|
2019 Q3 | 13F Filing | 2026-06-30 | 2026-07-09 | ||
|
APH
Amphenol Corp.
|
Technology | 6.24% | 5.08% |
#2
Prev: #2
|
4.5 |
—
|
-11,300 | -4.6% |
P
S
|
234,451 | $41,338,400 | 2021 Q4 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
AME
Ametek Inc.
|
Industrials | 5.10% | 4.90% |
#3
2
Prev: #5
|
3.5 |
—
|
-15 | -0.0% |
P
S
|
139,731 | $33,806,518 | 2018 Q1 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
V
Visa Inc.
|
Financial Services | 5.02% | 4.80% |
#4
2
Prev: #6
|
3.0 |
—
|
-195 | -0.2% |
P
S
|
96,971 | $33,269,780 | 2018 Q1 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
WSO
Watsco, Inc.
|
Industrials | 4.91% | 3.31% |
#5
11
Prev: #16
|
5.0 |
—
|
22,320 | 40.1% |
P
S
|
78,012 | $32,509,941 | 2014 Q4 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
AON
Aon plc
|
Financial Services | 4.45% | 4.69% |
#6
1
Prev: #7
|
2.3 |
—
|
25 | 0.0% |
P
S
|
88,807 | $29,456,394 | 2013 Q3 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
ECL
Ecolab Inc.
|
Basic Materials | 4.40% | 4.57% |
#7
1
Prev: #8
|
2.3 |
—
|
-315 | -0.3% |
P
S
|
104,693 | $29,168,517 | 2006 Q2 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
SCI
Service Corp. I...
|
Consumer Cyclical | 4.22% | 4.96% |
#8
5
Prev: #3
|
2.2 |
—
|
150 | 0.0% |
P
S
|
367,783 | $27,936,797 | 2015 Q1 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
ADI
Analog Devices
|
Technology | 4.03% | 4.95% |
#9
5
Prev: #4
|
1.6 |
—
|
-27,921 | -29.4% |
P
S
|
67,200 | $26,689,824 | 2016 Q3 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
FERG
Ferguson Enterp...
|
Industrials | 3.73% | 3.98% |
#10
Prev: #10
|
2.0 |
—
|
50 | 0.0% |
P
S
|
104,225 | $24,735,719 | 2024 Q4 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
DCI
Donaldson Co., ...
|
Industrials | 3.69% | 3.75% |
#11
1
Prev: #12
|
2.0 |
—
|
1,925 | 0.7% |
P
S
|
272,330 | $24,447,064 | 2024 Q1 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
KAI
Kadant Inc.
|
Industrials | 3.59% | 3.62% |
#12
2
Prev: #14
|
2.4 |
—
|
no change | no change |
P
S
|
75,735 | $23,798,209 | 2021 Q4 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
FAST
Fastenal Co.
|
Industrials | 3.43% | 1.38% |
#13
11
Prev: #24
|
4.4 |
—
|
291,190 | 160.7% |
P
S
|
472,440 | $22,691,293 | 2001 Q3 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
AWK
Amer. Water Wor...
|
Utilities | 3.36% | 3.76% |
#14
3
Prev: #11
|
1.8 |
—
|
300 | 0.2% |
P
S
|
169,344 | $22,282,284 | 2023 Q1 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
SCHW
Charles Schwab
|
Financial Services | 3.36% | 3.70% |
#15
2
Prev: #13
|
2.3 |
—
|
no change | no change |
P
S
|
240,933 | $22,230,888 | 2024 Q1 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
FSS
Federal Signal ...
|
Industrials | 3.28% | 1.11% |
#16
10
Prev: #26
|
4.3 |
—
|
106,555 | 169.9% |
P
S
|
169,285 | $21,751,430 | 2026 Q1 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
XYL
Xylem Inc.
|
Industrials | 3.23% | 1.58% |
#17
6
Prev: #23
|
4.3 |
—
|
100,220 | 124.0% |
P
S
|
181,050 | $21,401,920 | 2013 Q2 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
ROL
Rollins, Inc.
|
Consumer Cyclical | 3.12% | 3.98% |
#18
9
Prev: #9
|
3.2 |
—
|
39,925 | 8.8% |
P
S
|
495,655 | $20,688,640 | 2008 Q2 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
KRNT
Kornit Digital
|
Industrials | 3.08% | 3.01% |
#19
Prev: #19
|
1.7 |
—
|
650 | 0.1% |
P
S
|
1,255,265 | $20,398,056 | 2021 Q4 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
ALSN
Allison Transmi...
|
Consumer Cyclical | 2.81% | 3.15% |
#20
3
Prev: #17
|
1.6 |
—
|
440 | 0.3% |
P
S
|
165,037 | $18,606,271 | 2021 Q2 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
RYAN
Ryan Specialty ...
|
Financial Services | 2.65% | 2.65% |
#21
1
Prev: #20
|
1.6 |
—
|
-14,875 | -3.1% |
P
S
|
465,146 | $17,563,913 | 2021 Q4 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
PGR
Progressive Cor...
|
Financial Services | 2.19% | 2.15% |
#22
Prev: #22
|
1.9 |
—
|
no change | no change |
P
S
|
66,280 | $14,478,866 | 2019 Q4 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
DHR
Danaher Corp.
|
Healthcare | 2.13% | 3.56% |
#23
8
Prev: #15
|
0.9 |
—
|
-40,857 | -35.6% |
P
S
|
74,024 | $14,100,092 | 2020 Q1 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
NXE
NexGen Energy L...
|
Energy | 1.74% | 2.32% |
#24
3
Prev: #21
|
1.2 |
—
|
1,000 | 0.1% |
P
S
|
1,225,500 | $11,507,445 | 2014 Q4 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
BMI
Badger Meter In...
|
Technology | 1.41% | 3.04% |
#25
7
Prev: #18
|
0.6 |
—
|
-59,150 | -48.4% |
P
S
|
63,000 | $9,347,940 | 2025 Q4 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
A
Agilent Tech, I...
|
Healthcare | 1.39% | 1.03% |
#26
1
Prev: #27
|
3.1 |
—
|
14,300 | 25.9% |
P
S
|
69,500 | $9,231,685 | 2024 Q3 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
WAT
Waters Corporat...
|
Healthcare | 1.34% | 0.57% |
#27
4
Prev: #31
|
3.5 |
—
|
11,870 | 101.3% |
P
S
|
23,590 | $8,847,194 | 1999 Q1 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
HEI
HEICO Corp.
|
Industrials | 1.05% | 0.87% |
#28
Prev: #28
|
1.4 |
—
|
no change | no change |
P
S
|
19,500 | $6,945,705 | 2021 Q4 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
FISV
Fiserv Inc.
|
Unknown | 0.82% | 1.31% |
#29
4
Prev: #25
|
0.3 |
—
|
-33,365 | -23.2% |
P
S
|
110,558 | $5,422,870 | 2009 Q1 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
GNRC
Generac Holding...
|
Industrials | 0.71% | 0.63% |
#30
Prev: #30
|
0.8 |
—
|
-3,500 | -17.8% |
P
S
|
16,150 | $4,728,881 | 2022 Q4 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
PFE
Pfizer, Inc.
|
Healthcare | 0.60% | — |
#31
Prev: #—
|
3.7 |
—
|
165,000 | — |
NEW
|
165,000 | $3,973,200 | 2021 Q1 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
MSFT
Microsoft Corp.
|
Technology | 0.60% | 0.64% |
#32
3
Prev: #29
|
1.2 |
—
|
no change | no change |
P
S
|
10,569 | $3,942,448 | 2008 Q4 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
ORA
Ormat Technolog...
|
Utilities | 0.43% | 0.51% |
#33
1
Prev: #32
|
0.7 |
—
|
-1,900 | -6.8% |
P
S
|
26,100 | $2,842,290 | 2018 Q1 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
ROP
Roper Technolog...
|
Technology | 0.10% | 0.12% |
#34
Prev: #34
|
1.0 |
—
|
no change | no change |
P
S
|
2,000 | $676,780 | 2018 Q1 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
VNOM
Viper Energy In...
|
Energy | 0.05% | 0.06% |
#35
Prev: #35
|
1.0 |
—
|
no change | no change |
P
S
|
7,700 | $326,480 | 2025 Q4 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
SASKF
ATHA Energy Cor...
|
Energy | 0.01% | 0.01% |
#36
1
Prev: #37
|
1.0 |
—
|
no change | no change |
P
S
|
74,500 | $51,991 | 2024 Q1 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
STLNF
Stallion Uraniu...
|
Basic Materials | 0.00% | 0.01% |
#37
1
Prev: #36
|
1.0 |
—
|
no change | no change |
P
S
|
180,000 | $25,377 | 2025 Q3 | 13F Filing | 2026-06-30 | 2026-07-09 | |||
|
PHO
Invesco Water E...
|
ETF | 0.00% | 0.36% |
Sold All 😨
(Was: #33) |
0.0 |
—
|
-32,780 | -100.0% |
CLOSED
|
— | $— | 2023 Q1 | 13F Filing | 2026-06-30 | 2026-07-09 |
Showing 1-38 of 38 holdings