William Von Mueffling Portfolio Analysis: Concentration in Tech and Financial Giants
William Von Mueffling's $18.5B portfolio, as of December 31, 2025, shows significant concentration in large-cap technology and financial services stocks.

William Von Mueffling, managing $18.5 billion for Cantillon Capital Management as of December 31, 2025, holds a portfolio heavily concentrated in large-cap technology and financial services companies. His largest position is in Broadcom Inc. (AVGO), valued at approximately $15.9 billion, representing 8.62% of his total holdings. This is followed by Alphabet Inc. (GOOGL) with $1.32 billion (7.13%) and S&P Global Inc. (SPGI) with $917 million (4.96%).
The portfolio demonstrates a significant allocation to the Technology sector, with Broadcom leading the way, followed by Alphabet, Taiwan Semiconductor Manufacturing Co. (TSM), Applied Materials Inc. (AMAT), and Analog Devices Inc. (ADI). Collectively, these five Technology holdings account for nearly 24% of the portfolio. Financial Services is the second largest sector, represented by Interactive Brokers Group Inc. (IBKR), CBRE Group Inc. (CBRE), Visa Inc. (V), and Microsoft Corp. (MSFT).
Notable changes in holdings include a slight increase in shares for several stocks. Alphabet Inc. (GOOGL), Taiwan Semiconductor Manufacturing Co. (TSM), Applied Materials Inc. (AMAT), and Analog Devices Inc. (ADI) all saw an increase in their share count during the period, with a change percentage of 0.76%. Conversely, Broadcom Inc. (AVGO) experienced a decrease in its share count, albeit a small one at -2.03%.
For a complete view of William Von Mueffling's investment profile, including his investment history and methodology, please visit his profile on Insiderset: William Von Mueffling at Insiderset. Detailed information on each stock holding, including company profiles, can be found at: Broadcom Inc. (AVGO), Alphabet Inc. (GOOGL), S&P Global Inc. (SPGI), Taiwan Semiconductor Manufacturing Co. (TSM), Interactive Brokers Group Inc. (IBKR), CBRE Group Inc. (CBRE), Visa Inc. (V), Microsoft Corp. (MSFT), and Analog Devices Inc. (ADI).