William von Mueffling Cantillon Capital Management
William von Mueffling is the founder of Cantillon Capital Management, a firm known for concentrated global equity portfolios of high-quality companies. Cantillon’s process emphasizes durable competitive advantages and multi-year holding periods. The firm’s 13F disclosures are tracked by investors seeking institutional quality-growth exposure.
Top Buys
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$1.55B |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$1.28B |
| 3 |
TSMC
TSM
|
+$965M |
| 4 |
Interactive Brokers
IBKR
|
+$893M |
| 5 |
Analog Devices
ADI
|
+$722M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 42.65% |
| 2 | Financials | 25.96% |
| 3 | Communication Services | 13.71% |
| 4 | Industrials | 8.19% |
| 5 | Real Estate | 3.67% |
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William von Mueffling's Q2 2026 Portfolio in Review
As of Q2 2026, William von Mueffling held 38 positions worth $665M, down 96% from $15.1B the previous quarter. Its ten largest holdings account for 62% of the portfolio.
William von Mueffling withdrew a net $16B in Q2 2026, closing 11 positions and reducing 27 holdings. Its most notable exit was Thermo Fisher Scientific, an estimated $378M position sold in full.
By sector, the portfolio is most concentrated in Technology at 43% of assets, up from 33% a quarter earlier, followed by Financials and Communication Services.
- William von Mueffling's biggest Q2 2026 reduction was Broadcom, cutting an estimated $1.55B.
- William von Mueffling fully exited Thermo Fisher Scientific in Q2 2026, selling an estimated $378M.
- William von Mueffling's ten largest holdings make up 62% of its $665M portfolio in Q2 2026.
- William von Mueffling opened 0 new positions and closed 11 in Q2 2026.
- William von Mueffling's portfolio value fell 96% quarter-over-quarter to $665M.
Based on Cantillon Capital Management's 13F filing for Q2 2026, filed 29 Jul 2026.