DUDLEY & SHANLEY, INC.
Holdings as of 2026-06-30, filed 2026-07-09
This is history, not a current position. These holdings describe 2026-06-30, and the report became public 9 days later. The portfolio has changed since.
Aggregates
computed from the positions belowPositions reported
38
Value reported by manager
$662.3M
Sum of our stored positions
$662.3M
should match the line above
Disclosure lag
9 d
quarter end to filing
Top 5 concentration
26.3%
of the positions shown
New positions
0
vs previous quarter
Exited
0
vs previous quarter
Option positions
0
puts and calls
Positions
38 largest shown| Issuer | Class | Value | Shares | Type | CUSIP |
|---|---|---|---|---|---|
| Amphenol Corp. | COM | $41.3M | 234,451 | — | 032095101 |
| Ametek Inc. | COM | $33.8M | 139,731 | — | 031100100 |
| Visa Inc. | COM | $33.3M | 96,971 | — | 92826C839 |
| Wheaton Precious Mtls | COM | $33M | 294,132 | — | 962879102 |
| Watsco, Inc. | COM | $32.5M | 78,012 | — | 942622200 |
| Aon plc | COM | $29.5M | 88,807 | — | G0403H108 |
| Ecolab Inc. | COM | $29.2M | 104,693 | — | 278865100 |
| Service Corp. Int'l | COM | $27.9M | 367,783 | — | 817565104 |
| Analog Devices | COM | $26.7M | 67,200 | — | 032654105 |
| Ferguson Enterprises | COM | $24.7M | 104,225 | — | 31488V107 |
| Donaldson Co., Inc. | COM | $24.4M | 272,330 | — | 257651109 |
| Kadant Inc. | COM | $23.8M | 75,735 | — | 48282T104 |
| Fastenal Co. | COM | $22.7M | 472,440 | — | 311900104 |
| Amer. Water Works | COM | $22.3M | 169,344 | — | 030420103 |
| Charles Schwab | COM | $22.2M | 240,933 | — | 808513105 |
| Federal Signal Corp | COM | $21.8M | 169,285 | — | 313855108 |
| Xylem Inc. | COM | $21.4M | 181,050 | — | 98419M100 |
| Rollins, Inc. | COM | $20.7M | 495,655 | — | 775711104 |
| Kornit Digital | COM | $20.4M | 1,255,265 | — | M6372Q113 |
| Allison Transmission | COM | $18.6M | 165,037 | — | 01973R101 |
| Wheaton Precious Mtls | COM | $18M | 160,508 | — | 962879102 |
| Ryan Specialty Hldngs | COM | $17.6M | 465,146 | — | 78351F107 |
| Progressive Corp. | COM | $14.5M | 66,280 | — | 743315103 |
| Danaher Corp. | COM | $14.1M | 74,024 | — | 235851102 |
| NexGen Energy Ltd. | COM | $11.5M | 1,225,500 | — | 65340P106 |
| Badger Meter Inc | COM | $9.3M | 63,000 | — | 056525108 |
| Agilent Tech, Inc. | COM | $9.2M | 69,500 | — | 00846U101 |
| Waters Corporation | COM | $8.8M | 23,590 | — | 941848103 |
| HEICO Corp. | COM | $6.9M | 19,500 | — | 422806109 |
| Fiserv Inc. | COM | $5.4M | 110,558 | — | 337738108 |
| Generac Holdings | COM | $4.7M | 16,150 | — | 368736104 |
| Pfizer, Inc. | COM | $4M | 165,000 | — | 717081103 |
| Microsoft Corp. | COM | $3.9M | 10,569 | — | 594918104 |
| Ormat Technologies | COM | $2.8M | 26,100 | — | 686688102 |
| Roper Technologies | COM | $676.8K | 2,000 | — | 776696106 |
| Viper Energy Inc | COM | $326.5K | 7,700 | — | 64361Q101 |
| ATHA Energy Corp. | COM | $52K | 74,500 | — | 046824108 |
| Stallion Uranium Corp | COM | $25.4K | 180,000 | — | 852919208 |
Values are shown exactly as filed. Before 2023 managers reported in thousands of dollars and afterwards in whole dollars; the reporting unit is not always determinable from the document, so nothing is converted automatically.
Source: U.S. Securities and Exchange Commission, Form 13F · as of 2026-07-09