DUDLEY & SHANLEY, INC.
CIK 0000883511
Annualised vol
9.322076%
Beta
0.393425
HHI
371.308214
Top-10 weight
47.101807%
VaR 95%
0.823677%
VaR 99%
1.67414%
Max drawdown
17.204276%
Matched value
58.380565%
Returns of reported holdings
Loading returns…
Position changes vs prior quarter
What the latest 13F shows bought and sold against the quarter before, by share count.
| Ticker | Change | Shares now | Shares before | Share change % | Value now ($) |
|---|---|---|---|---|---|
| AME | REDUCED | 139,731 | 139,746 | -0.01% | 33,806,518 |
| V | REDUCED | 96,971 | 97,166 | -0.2% | 33,269,780 |
| WSO | ADDED | 78,012 | 55,692 | 40.08% | 32,509,941 |
| AON | ADDED | 88,807 | 88,782 | 0.03% | 29,456,394 |
| ECL | REDUCED | 104,693 | 105,008 | -0.3% | 29,168,517 |
| ADI | REDUCED | 67,200 | 95,121 | -29.35% | 26,689,824 |
| DCI | ADDED | 272,330 | 270,405 | 0.71% | 24,447,064 |
| KAI | UNCHANGED | 75,735 | 75,735 | 0.0% | 23,798,209 |
| FAST | ADDED | 472,440 | 181,250 | 160.66% | 22,691,293 |
| XYL | ADDED | 181,050 | 80,830 | 123.99% | 21,401,920 |
| ROL | ADDED | 495,655 | 455,730 | 8.76% | 20,688,640 |
| KRNT | ADDED | 1,255,265 | 1,254,615 | 0.05% | 20,398,056 |
| ALSN | ADDED | 165,037 | 164,597 | 0.27% | 18,606,271 |
| NXE | ADDED | 1,225,500 | 1,224,500 | 0.08% | 11,507,445 |
| BMI | REDUCED | 63,000 | 122,150 | -48.42% | 9,347,940 |
| HEI | UNCHANGED | 19,500 | 19,500 | 0.0% | 6,945,705 |
| FISV | REDUCED | 110,558 | 143,923 | -23.18% | 5,422,870 |
| GNRC | REDUCED | 16,150 | 19,650 | -17.81% | 4,728,881 |
| PFE | NEW | 165,000 | - | - | 3,973,200 |
| MSFT | UNCHANGED | 10,569 | 10,569 | 0.0% | 3,942,448 |
| ORA | REDUCED | 26,100 | 28,000 | -6.79% | 2,842,290 |
| ROP | UNCHANGED | 2,000 | 2,000 | 0.0% | 676,780 |
| VNOM | UNCHANGED | 7,700 | 7,700 | 0.0% | 326,480 |
| STLNF | UNCHANGED | 180,000 | 180,000 | 0.0% | 25,377 |
Holdings (latest quarter)
| Ticker | Change | Issuer | Class | CUSIP | Value ($) | Weight % | Shares |
|---|---|---|---|---|---|---|---|
| - | Amphenol Corp. | COM | 032095101 | 41,338,400 | 6.24 | 234451.0 | |
| AME | REDUCED | Ametek Inc. | COM | 031100100 | 33,806,518 | 5.1 | 139731.0 |
| V | REDUCED | Visa Inc. | COM | 92826C839 | 33,269,780 | 5.02 | 96971.0 |
| - | Wheaton Precious Mtls | COM | 962879102 | 33,036,906 | 4.99 | 294132.0 | |
| WSO | ADDED | Watsco, Inc. | COM | 942622200 | 32,509,941 | 4.91 | 78012.0 |
| AON | ADDED | Aon plc | COM | g0403h108 | 29,456,394 | 4.45 | 88807.0 |
| ECL | REDUCED | Ecolab Inc. | COM | 278865100 | 29,168,517 | 4.4 | 104693.0 |
| - | Service Corp. Int'l | COM | 817565104 | 27,936,797 | 4.22 | 367783.0 | |
| ADI | REDUCED | Analog Devices | COM | 032654105 | 26,689,824 | 4.03 | 67200.0 |
| - | Ferguson Enterprises | COM | 31488V107 | 24,735,719 | 3.73 | 104225.0 | |
| DCI | ADDED | Donaldson Co., Inc. | COM | 257651109 | 24,447,064 | 3.69 | 272330.0 |
| KAI | UNCHANGED | Kadant Inc. | COM | 48282T104 | 23,798,209 | 3.59 | 75735.0 |
| FAST | ADDED | Fastenal Co. | COM | 311900104 | 22,691,293 | 3.43 | 472440.0 |
| - | Amer. Water Works | COM | 030420103 | 22,282,284 | 3.36 | 169344.0 | |
| - | Charles Schwab | COM | 808513105 | 22,230,888 | 3.36 | 240933.0 | |
| - | Federal Signal Corp | COM | 313855108 | 21,751,430 | 3.28 | 169285.0 | |
| XYL | ADDED | Xylem Inc. | COM | 98419M100 | 21,401,920 | 3.23 | 181050.0 |
| ROL | ADDED | Rollins, Inc. | COM | 775711104 | 20,688,640 | 3.12 | 495655.0 |
| KRNT | ADDED | Kornit Digital | COM | M6372Q113 | 20,398,056 | 3.08 | 1255265.0 |
| ALSN | ADDED | Allison Transmission | COM | 01973R101 | 18,606,271 | 2.81 | 165037.0 |
| - | Wheaton Precious Mtls | COM | 962879102 | 18,028,259 | 2.72 | 160508.0 | |
| - | Ryan Specialty Hldngs | COM | 78351F107 | 17,563,913 | 2.65 | 465146.0 | |
| - | Progressive Corp. | COM | 743315103 | 14,478,866 | 2.19 | 66280.0 | |
| - | Danaher Corp. | COM | 235851102 | 14,100,092 | 2.13 | 74024.0 | |
| NXE | ADDED | NexGen Energy Ltd. | COM | 65340P106 | 11,507,445 | 1.74 | 1225500.0 |
| BMI | REDUCED | Badger Meter Inc | COM | 056525108 | 9,347,940 | 1.41 | 63000.0 |
| - | Agilent Tech, Inc. | COM | 00846U101 | 9,231,685 | 1.39 | 69500.0 | |
| - | Waters Corporation | COM | 941848103 | 8,847,194 | 1.34 | 23590.0 | |
| HEI | UNCHANGED | HEICO Corp. | COM | 422806109 | 6,945,705 | 1.05 | 19500.0 |
| FISV | REDUCED | Fiserv Inc. | COM | 337738108 | 5,422,870 | 0.82 | 110558.0 |
| GNRC | REDUCED | Generac Holdings | COM | 368736104 | 4,728,881 | 0.71 | 16150.0 |
| PFE | NEW | Pfizer, Inc. | COM | 717081103 | 3,973,200 | 0.6 | 165000.0 |
| MSFT | UNCHANGED | Microsoft Corp. | COM | 594918104 | 3,942,448 | 0.6 | 10569.0 |
| ORA | REDUCED | Ormat Technologies | COM | 686688102 | 2,842,290 | 0.43 | 26100.0 |
| ROP | UNCHANGED | Roper Technologies | COM | 776696106 | 676,780 | 0.1 | 2000.0 |
| VNOM | UNCHANGED | Viper Energy Inc | COM | 64361Q101 | 326,480 | 0.05 | 7700.0 |
| - | ATHA Energy Corp. | COM | 046824108 | 51,991 | 0.01 | 74500.0 | |
| STLNF | UNCHANGED | Stallion Uranium Corp | COM | 852919208 | 25,377 | 0.0 | 180000.0 |
Quarterly portfolios
| Period | Filed | Value ($) | Positions | Vol % | Beta | Max DD % |
|---|---|---|---|---|---|---|
| 2026-06-30 | 2026-07-09 | 662,286,267 | 38 | 9.322076 | 0.393425 | 17.204276 |
| 2026-03-31 | 2026-04-08 | 611,236,912 | 38 | 8.766443 | 0.372868 | 16.406603 |
| 2025-12-31 | 2026-01-09 | 622,207,310 | 34 | 8.481176 | 0.365348 | 16.21439 |
| 2025-09-30 | 2025-10-08 | 621,510,780 | 33 | 8.639902 | 0.374233 | 17.307993 |
| 2025-03-31 | 2025-04-09 | 635,077,989 | 37 | 8.730192 | 0.376256 | 18.326557 |
| 2024-12-31 | 2025-01-03 | 647,562,638 | 38 | 8.581796 | 0.37012 | 17.9579 |
| 2024-09-30 | 2024-12-23 | 639,700,105 | 37 | 8.460164 | 0.364739 | 17.711639 |