Largest positions
| Issuer | Class | Value | Share |
|---|---|---|---|
| Wheaton Precious MtlsCOM | COM | $51.1M | 7.7% |
| Amphenol Corp..COM | COM | $41.3M | 6.2% |
| Ametek Inc..COM | COM | $33.8M | 5.1% |
| Visa Inc..COM | COM | $33.3M | 5.0% |
| Watsco, Inc..COM | COM | $32.5M | 4.9% |
| Aon PLCCOM | COM | $29.5M | 4.4% |
| Ecolab Inc..COM | COM | $29.2M | 4.4% |
| Service Corp.. Int'lCOM | COM | $27.9M | 4.2% |
| Analog DevicesCOM | COM | $26.7M | 4.0% |
| Ferguson EnterprisesCOM | COM | $24.7M | 3.7% |
| Donaldson Co., Inc..COM | COM | $24.4M | 3.7% |
| Kadant Inc..COM | COM | $23.8M | 3.6% |
| Fastenal Co.COM | COM | $22.7M | 3.4% |
| Amer. Water WorksCOM | COM | $22.3M | 3.4% |
| Charles SchwabCOM | COM | $22.2M | 3.4% |
| Federal Signal Corp.COM | COM | $21.8M | 3.3% |
| Xylem Inc..COM | COM | $21.4M | 3.2% |
| Rollins, Inc..COM | COM | $20.7M | 3.1% |
| Kornit DigitalCOM | COM | $20.4M | 3.1% |
| Allison TransmissionCOM | COM | $18.6M | 2.8% |
| Ryan Specialty HldngsCOM | COM | $17.6M | 2.7% |
| Progressive Corp..COM | COM | $14.5M | 2.2% |
| Danaher Corp..COM | COM | $14.1M | 2.1% |
| Nexgen Energy Ltd.COM | COM | $11.5M | 1.7% |
| Badger Meter Inc.COM | COM | $9.35M | 1.4% |
| Agilent Tech, Inc..COM | COM | $9.23M | 1.4% |
| Waters CorporationCOM | COM | $8.85M | 1.3% |
| Heico Corp..COM | COM | $6.95M | 1.0% |
| Fiserv Inc..COM | COM | $5.42M | 0.8% |
| Generac HoldingsCOM | COM | $4.73M | 0.7% |
| Pfizer, Inc..COM | COM | $3.97M | 0.6% |
| Microsoft Corp..COM | COM | $3.94M | 0.6% |
| Ormat TechnologiesCOM | COM | $2.84M | 0.4% |
| Roper TechnologiesCOM | COM | $677K | 0.1% |
| Viper Energy Inc.COM | COM | $326K | 0.0% |
| Atha Energy Corp..COM | COM | $52K | 0.0% |
| Stallion Uranium Corp.COM | COM | $25.4K | 0.0% |
- Class
- COM
- Share
- 7.7%
- Class
- COM
- Share
- 6.2%
- Class
- COM
- Share
- 5.1%
- Class
- COM
- Share
- 5.0%
- Class
- COM
- Share
- 4.9%
- Class
- COM
- Share
- 4.4%
- Class
- COM
- Share
- 4.4%
- Class
- COM
- Share
- 4.2%
- Class
- COM
- Share
- 4.0%
- Class
- COM
- Share
- 3.7%
- Class
- COM
- Share
- 3.7%
- Class
- COM
- Share
- 3.6%
- Class
- COM
- Share
- 3.4%
- Class
- COM
- Share
- 3.4%
- Class
- COM
- Share
- 3.4%
- Class
- COM
- Share
- 3.3%
- Class
- COM
- Share
- 3.2%
- Class
- COM
- Share
- 3.1%
- Class
- COM
- Share
- 3.1%
- Class
- COM
- Share
- 2.8%
- Class
- COM
- Share
- 2.7%
- Class
- COM
- Share
- 2.2%
- Class
- COM
- Share
- 2.1%
- Class
- COM
- Share
- 1.7%
- Class
- COM
- Share
- 1.4%
- Class
- COM
- Share
- 1.4%
- Class
- COM
- Share
- 1.3%
- Class
- COM
- Share
- 1.0%
- Class
- COM
- Share
- 0.8%
- Class
- COM
- Share
- 0.7%
- Class
- COM
- Share
- 0.6%
- Class
- COM
- Share
- 0.6%
- Class
- COM
- Share
- 0.4%
- Class
- COM
- Share
- 0.1%
- Class
- COM
- Share
- 0.0%
- Class
- COM
- Share
- 0.0%
- Class
- COM
- Share
- 0.0%
The share class is shown on a wider screen.
The 37 largest of 37 positions by value, with holdings of the same security combined. Share counts and quarter-on-quarter changes for each position are on EDGAR. View the full information table on EDGAR
This filing
- Form
- 13F-HR
- CIK
- 883511
- File number
- 028-03037
- Options
- 0 call, 0 put
- In the 25 largest
- 92.9%
- Prior quarter
- $611M at 31 March 2026
- Positions opened
- 1
- Positions closed
- 1
Common questions
What are Dudley & Shanley’s 13F holdings worth?
$662 million across 37 positions for the quarter ended 30 June 2026.
What is Dudley & Shanley’s largest 13F holding?
Wheaton Precious Mtls (COM) was the largest position at $51.1 million, or 7.7% of reported 13F value, as of 30 June 2026.
How concentrated is Dudley & Shanley’s 13F portfolio?
The ten largest positions accounted for 49.8% of reported value and the twenty-five largest for 92.9%, across 37 positions as of 30 June 2026.
Does Form 13F show everything Dudley & Shanley manages?
No. Form 13F covers only long positions in exchange-traded securities over which the manager has investment discretion, valued at quarter end. It excludes cash, most bonds, private funds, and any assets the firm does not have discretion over, so it is neither the firm's total assets nor any individual client's portfolio.
How often does Dudley & Shanley file its 13F?
Every quarter. Managers file within 45 days of each quarter's end, so the figures are a snapshot that changes between filings. This page shows the quarter ended 30 June 2026.
Answered from this filing and the prior quarter's.