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DUDLEY & SHANLEY, INC.
hedge fundUpdated 64 days agoManaged by Dudley & Shanley, Inc. • Latest filing Q2 2026
Portfolio value
$662.3M
Q2 2026
Filings
13
Quarterly 13F history
Top-10 concentration
100.0%
Weight of largest holdings
Annualized return
6.2%
Implied from 13F holdings
Portfolio value history
13F-disclosed portfolio value over 13 quarters
Show data table
| Period | Portfolio value |
|---|---|
| Q2 2023 | $553.8M |
| Q3 2023 | $528.9M |
| Q4 2023 | $561M |
| Q1 2024 | $592.6M |
| Q2 2024 | $581.9M |
| Q3 2024 | $639.7M |
| Q4 2024 | $647.6M |
| Q1 2025 | $635.1M |
| Q2 2025 | $636.8M |
| Q3 2025 | $621.5M |
| Q4 2025 | $622.2M |
| Q1 2026 | $611.2M |
| Q2 2026 | $662.3M |
Top holdings
38 positions as of Q2 2026
| # | Stock | Value | Shares | % Portfolio | Change |
|---|---|---|---|---|---|
| 1 | A APH Amphenol Corp. | $41.3M | 234.5K | 6.24% | Trimmed(-4.6%) |
| 2 | A AME Ametek Inc. | $33.8M | 139.7K | 5.10% | Trimmed(-0.0%) |
| 3 | V V Visa Inc. | $33.3M | 97.0K | 5.02% | Trimmed(-0.2%) |
| 4 | W WPM Wheaton Precious Mtls | $33M | 294.1K | 4.99% | Trimmed(-1.6%) |
| 5 | W WSO-B Watsco, Inc. | $32.5M | 78.0K | 4.91% | Added(+40.1%) |
| 6 | A AON Aon plc | $29.5M | 88.8K | 4.45% | Added(+0.0%) |
| 7 | E ECL Ecolab Inc. | $29.2M | 104.7K | 4.40% | Trimmed(-0.3%) |
| 8 | S SCI Service Corp. Int'l | $27.9M | 367.8K | 4.22% | Added(+0.0%) |
| 9 | A ADI Analog Devices | $26.7M | 67.2K | 4.03% | Trimmed(-29.4%) |
| 10 | F FERG Ferguson Enterprises | $24.7M | 104.2K | 3.73% | Added(+0.1%) |
| 11 | D DCI Donaldson Co., Inc. | $24.4M | 272.3K | 3.69% | Added(+0.7%) |
| 12 | K KAI Kadant Inc. | $23.8M | 75.7K | 3.59% | Unchanged |
| 13 | F FAST Fastenal Co. | $22.7M | 472.4K | 3.43% | Added(+160.7%) |
| 14 | A AWK Amer. Water Works | $22.3M | 169.3K | 3.36% | Added(+0.2%) |
| 15 | S SCHW-PJ Charles Schwab | $22.2M | 240.9K | 3.36% | Unchanged |
| 16 | F FSS Federal Signal Corp | $21.8M | 169.3K | 3.28% | Added(+169.9%) |
| 17 | X XYL Xylem Inc. | $21.4M | 181.1K | 3.23% | Added(+124.0%) |
| 18 | R ROL Rollins, Inc. | $20.7M | 495.7K | 3.12% | Added(+8.8%) |
| 19 | K KRNT Kornit Digital | $20.4M | 1.26M | 3.08% | Added(+0.1%) |
| 20 | A ALSN Allison Transmission | $18.6M | 165.0K | 2.81% | Added(+0.3%) |