Dudley & Shanley
Dudley & Shanley reported 36 stocks worth $629M in its 13F filing for Q3 2026, filed Oct 6, 2026. Its largest holdings are WPM (9.0%), AME (5.0%) and V (4.8%). Compared with Q2 2026, the fund opened new positions in TYL, added to APH, PGR and ROP, trimmed WPM, AME and V and sold out of ROL and STLNF.
Holdings
| # | Stock | Value | Weight | Shares | Change | Shares, 8 qtrs | Held |
|---|---|---|---|---|---|---|---|
| 1 |  WPM Wheaton Precious Metals Corp | $56.4M | 9.0% | 421K | −33K (−7%) | 8 of 8 | |
| 2 |  AME Ametek Inc | $31.5M | 5.0% | 127K | −12K (−9%) | 8 of 8 | |
| 3 |  V Visa Inc | $30.3M | 4.8% | 84K | −13K (−13%) | 8 of 8 | |
| 4 |  ECL Ecolab Inc | $27.2M | 4.3% | 99K | −5,650 (−5%) | 8 of 8 | |
| 5 |  SCI Service Corp Intl | $26.1M | 4.1% | 342K | −25K (−7%) | 8 of 8 | |
| 6 |  APH Amphenol Corp New | $25.9M | 4.1% | 308K | +73K (+31%) | 8 of 8 | |
| 7 |  ADI Analog Devices Inc | $25.6M | 4.1% | 65K | −2,561 (−4%) | 8 of 8 | |
| 8 |  AON Aon PLC | $23.6M | 3.8% | 85K | −3,605 (−4%) | 8 of 8 | |
| 9 |  DCI Donaldson Inc | $22.6M | 3.6% | 260K | −12K (−4%) | 8 of 8 | |
| 10 |  FAST Fastenal Co | $22.5M | 3.6% | 455K | −18K (−4%) | 4 of 8 |
Positions at Sep 30, 2026, as reported. Change is against the fund's Q2 2026 filing; weight is the share of the fund's reported stocks.
Sold out
held in Q2 2026, gone in Q3 2026
Reported value
last 8 quartersThe value of the US stocks the fund reported, at quarter end prices. It moves with the market as well as with buying and selling.
Filings for Q3 2026
straight from the SEC| Filed | Form | Quarter | |
|---|---|---|---|
| Oct 6, 2026 | 13F-HR | Q3 2026 | SEC filing ↗ |
Other superinvestors
All hedge fund holdings →Dudley & Shanley 13F FAQ
What does Dudley & Shanley own?
Dudley & Shanley reported 36 stocks worth $629M in its 13F filing for Q3 2026, filed Oct 6, 2026. Its largest holdings are WPM (9.0%), AME (5.0%) and V (4.8%). The table above lists every position in the filing (the top 10 without an account).
What did Dudley & Shanley buy and sell in Q3 2026?
Compared with Q2 2026: 1 new positions, 8 added to, 20 trimmed and 2 sold out. New positions include TYL. It sold all of ROL and STLNF.
When will Dudley & Shanley file its next 13F?
Holdings as of Dec 31, 2026 are due by Feb 15, 2027. The filing appears on this page within minutes of reaching the SEC.
How much is Dudley & Shanley's portfolio worth?
The Q3 2026 filing reports $629M in US stocks. That leaves out cash, bonds, short positions and most foreign holdings, so the fund's total assets are usually larger.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Holdings come from the fund's SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. The fund may have changed its positions since. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.