Dudley & Shanley, Inc. reported 34 positions worth $605.50M for the quarter ended Sep 30, 2026, down 4.3% on the prior quarter. It opened 1 new position, added to 6, trimmed 20 and exited 1. Its largest holding is Wheaton Precious Metals Corp. at 9.3% of the portfolio.
Reported 13F market value at each quarter end. A change mixes trading with price moves in the positions held.
Dollar value of shares bought and sold each quarter, at that quarter’s price. It counts trading only, not price changes.
How many positions were opened, added to, trimmed or closed each quarter.
Share of reported value in each sector at every quarter end.
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| TYL Tyler Technologies Inc | +64.4K | – | $20.52M | 3.39% |
| ROP Roper Technologies Inc | +55.3K | +2,766.3% | $19.33M | 3.31% |
| PGR Progressive Corp | +37.9K | +57.1% | $7.85M | 3.57% |
| BMI Badger Meter Inc | +21.6K | +34.3% | $2.67M | 1.73% |
| ALSN Allison Transmission Holdings Inc | +10.2K | +6.2% | $1.16M | 3.28% |
| FSS Federal Signal Corp | +4,765 | +2.8% | $527.91K | 3.18% |
| RYAN Ryan Specialty Holdings, Inc. | +743 | +0.2% | $27.49K | 2.85% |
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| ROL Rollins Inc | -495.7K | -100.0% | $20.69M | Exited |
| APH Amphenol Corp | -161.1K | -34.4% | $13.58M | 4.29% |
| WSO Watsco Inc | -26.4K | -33.9% | $8.01M | 2.58% |
| V Visa Inc. | -12.6K | -12.9% | $4.51M | 5.01% |
| WPM Wheaton Precious Metals Corp. | -33.2K | -7.3% | $4.44M | 9.31% |
| AME Ametek Inc/ | -12.5K | -8.9% | $3.09M | 5.21% |
| SCHW Schwab Charles Corp | -29.0K | -12.0% | $2.83M | 3.42% |
| FISV Fiserv Inc | -48.1K | -43.5% | $2.17M | 0.466% |
| SCI Service Corp International | -25.4K | -6.9% | $1.93M | 4.31% |
| ECL Ecolab Inc. | -5,650 | -5.4% | $1.55M | 4.49% |
| Holding | Shares | Trade Value | Weight |
|---|---|---|---|
| TYL Tyler Technologies Inc | +64.4K | $20.52M | 3.39% |
| Holding | Shares Sold | Trade Value | Prior Weight |
|---|---|---|---|
| ROL Rollins Inc | -495.7K | $20.69M | 3.27% |
| # | Activity | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | WPM Wheaton Precious Metals Corp. | Financial Services | 421.4K | $56.35M | 9.31% | -33.2K | -7.3% | Reduced | 0.09% |
| 2 | AME Ametek Inc/ | Industrials | 127.2K | $31.52M | 5.21% | -12.5K | -8.9% | Reduced | 0.06% |
| 3 | V Visa Inc. | Financial Services | 84.4K | $30.33M | 5.01% | -12.6K | -12.9% | Reduced | 0% |
| 4 | ECL Ecolab Inc. | Industrials | 99.0K | $27.20M | 4.49% | -5,650 | -5.4% | Reduced | 0.04% |
| 5 | SCI Service Corp International | Consumer Discretionary | 342.4K | $26.08M | 4.31% | -25.4K | -6.9% | Reduced | 0.25% |
| 6 | APH Amphenol Corp | Industrials | 307.8K | $25.95M | 4.29% | -161.1K | -34.4% | Reduced | 0.01% |
| 7 | ADI Analog Devices Inc | Technology | 64.6K | $25.64M | 4.24% | -2,561 | -3.8% | Reduced | 0.01% |
| 8 | DCI DONALDSON Co INC | Industrials | 260.2K | $22.65M | 3.74% | -12.2K | -4.5% | Reduced | 0.22% |
| 9 | FAST Fastenal Co | Industrials | 454.9K | $22.53M | 3.72% | -17.5K | -3.7% | Reduced | 0.04% |
| 10 | FERG Ferguson Enterprises Inc. | Industrials | 100.0K | $22.27M | 3.68% | -4,193 | -4.0% | Reduced | 0.05% |
| 11 | PGR Progressive Corp | Financial Services | 104.2K | $21.59M | 3.57% | +37.9K | +57.1% | Added | 0.02% |
| 12 | AWK American Water Works Company, Inc. | Utilities | 160.6K | $20.79M | 3.43% | -8,794 | -5.2% | Reduced | 0.08% |
| 13 | SCHW Schwab Charles Corp | Financial Services | 212.0K | $20.72M | 3.42% | -29.0K | -12.0% | Reduced | 0.01% |
| 14 | TYL Tyler Technologies Inc | Technology | 64.4K | $20.52M | 3.39% | +64.4K | – | New | 0.13% |
| 15 | ROP Roper Technologies Inc | Technology | 57.3K | $20.03M | 3.31% | +55.3K | +2,766.3% | Added | 0.06% |
Tip. Select a row to see that position’s full history at Dudley & Shanley.
As of its Q3 2026 13F filing, Dudley & Shanley, Inc.’s five largest positions were Wheaton Precious Metals Corp. (WPM) at 9.3%, Ametek Inc/ (AME) at 5.2%, Visa Inc. (V) at 5.0%, Ecolab Inc. (ECL) at 4.5%, Service Corp International (SCI) at 4.3% of the reported portfolio.
Dudley & Shanley, Inc. reported a 13F portfolio worth $605.50M across 34 positions for Q3 2026. That is down 4.3% from the previous quarter.
Its largest purchases by value were Tyler Technologies Inc ($20.52M), Roper Technologies Inc ($19.33M), Progressive Corp ($7.85M). It opened 1 new positions.
Its largest sales by value were Rollins Inc ($20.69M), Amphenol Corp ($13.58M), Watsco Inc ($8.01M). It exited 1 positions entirely.
From the Form 13F-HR reports Dudley & Shanley, Inc. files with the SEC each quarter, within 45 days of quarter end. A 13F lists long positions in US-listed equities and options; it excludes short positions, cash, bonds and most non-US holdings.
13F data reflects long positions in US-listed equities and options as reported to the SEC up to 45 days after quarter end. It excludes short positions, cash, bonds and most non-US securities, so it is not a complete picture of a manager’s assets.