DUDLEY & SHANLEY, INC.
Filing Date
Global Rank
#2,064
/ 8,232
▲ 119
Top Industry
Specialty Industrial Machinery
17.8%
3Y Alpha vs SPY
-9.7%
Period ended 2 months ago
Filed Apr 8, 2026 · 2mo
25 quarters · since Mar 2020
Clone Performance
Jun 2023–Jun 2026 · vs SPYHypothetical growth of cloning every reported 13F position and rebalancing on each filing, indexed to the same start.
Cloned portfolio
+37.5%
SPY
+76.5%
Annualised alpha
-9.7%
Max drawdown
−14.0%
Estimate. 13F holdings are quarter-lagged and long-only, so the clone rebalances about 45 days after each period end — when the filing becomes public — and excludes options and short positions. Past performance does not predict future results.
Portfolio Concentration
35 positions · as of Mar 31, 2026 · Δ vs Dec 31, 2025Top Position
9.9%
−2.8 pts
Top 5
29.9%
−5.0 pts
Top 10
52.0%
−5.3 pts
HHI
431
Diversified−75
Portfolio Trend
25 quarters · across all stocks
Sector Breakdown
As of Mar 31, 2026| Sector | % Portfolio | Value |
|---|---|---|
| Industrials | 28.2% | $172,036,999 |
| Financial Services | 18.1% | $110,002,642 |
| Basic Materials | 14.5% | $88,174,776 |
| Technology | 13.9% | $84,542,030 |
| Consumer Cyclical | 12.1% | $73,941,661 |
| Healthcare | 5.2% | $31,563,349 |
| Utilities | 4.3% | $26,138,957 |
| Energy | 2.4% | $14,566,023 |
| Unclassified | 1.3% | $8,030,903 |
Last Quarter's Activity
Export CSVAdded To
Positions the filer increased
6 positions
| Ticker | Company | Δ Shares | Shares | Value | Open |
|---|---|---|---|---|---|
| KRNT | Kornit Digital Ltd. | +352,655 | 1,254,615 | $18,392,655 | |
| FAST | Fastenal Co | +174,100 | 181,250 | $8,410,000 | |
| STLNF | Stallion Uranium Corp. | +95,000 | 180,000 | $56,520 | |
| BMI | Badger Meter Inc | +39,455 | 122,150 | $18,609,552 | |
| KAI | Kadant Inc | +20,615 | 75,735 | $22,141,127 | |
| RYAN | Ryan Specialty Holdings, Inc. | +2,350 | 480,021 | $16,195,908 | |
| No positions match the current search. | |||||
Trimmed
Positions the filer reduced
8 positions
| Ticker | Company | Δ Shares | Shares | Value | Open |
|---|---|---|---|---|---|
| WPM | Wheaton Precious Metals Corp. | −209,220 | 459,385 | $60,184,028 | |
| APH | Amphenol Corp /De/ | −37,160 | 245,751 | $31,050,638 | |
| ADI | Analog Devices Inc | −29,900 | 95,121 | $30,261,794 | |
| ROP | Roper Technologies Inc | −15,455 | 2,000 | $707,720 | |
| NXE | NexGen Energy Ltd. | −10,650 | 1,224,500 | $14,204,200 | |
| V | Visa Inc. | −50 | 97,166 | $29,367,451 | |
| ECL | Ecolab Inc. | −50 | 105,008 | $27,934,228 | |
| AME | Ametek Inc/ | −50 | 139,746 | $29,955,952 | |
| No positions match the current search. | |||||
Sold Out
Positions the filer fully exitedNo qualifying positions this quarter.
5 positions ·
$84,542,030 total
· Technology only
· as of Mar 31, 2026
All sectors
Basic Materials
Consumer Cyclical
Energy
Financial Services
Healthcare
Industrials
Technology
Utilities
| Ticker | Company | Type | Shares | Value (USD) | % of Portfolio | History |
|---|---|---|---|---|---|---|
| APH |
Amphenol Corp /De/
Technology
|
Reduced | 245,751 | $31,050,638 | 36.73% | |
| ADI |
Analog Devices Inc
Technology
|
Reduced | 95,121 | $30,261,794 | 35.79% | |
| BMI |
Badger Meter Inc
Technology
|
Added | 122,150 | $18,609,552 | 22.01% | |
| MSFT |
Microsoft Corp
Technology
|
Held | 10,569 | $3,912,326 | 4.63% | |
| ROP |
Roper Technologies Inc
Technology
|
Reduced | 2,000 | $707,720 | 0.84% |