Mark Massey's Q4 Portfolio Shows Significant Share Reductions
Mark Massey's portfolio saw substantial decreases in several major holdings during the quarter ending December 2025, including notable reductions in Microsoft, Moody's, and Alphabet.
AltaRock Partners' portfolio held by Mark Massey, as of December 31, 2025, maintained a substantial value of approximately $5.1 billion. The portfolio's top holdings experienced various changes during the quarter.
Amazon (AMZN) saw a slight reduction in its share count by 3.22%, while TransDigm (TDG) experienced a minimal decrease of 0.72%.
Microsoft (MSFT) faced a significant reduction, with its share count decreasing by 18.95%. Moody's (MCO) also saw a substantial decline, with its share count dropping by 14.15%. Mastercard (MA) experienced a moderate decrease of 7.23%, and Visa (V) saw a reduction of 3.16%.
Notably, Alphabet (GOOGL) experienced the most dramatic change, with its share count plummeting by 50.81%, significantly impacting its portfolio allocation.
For detailed insights into Mark Massey's investment activities, visit his profile on Insiderset: Mark Massey at Insiderset.
To explore the performance and details of specific stocks held in the portfolio, such as Amazon (AMZN), TransDigm (TDG), Microsoft (MSFT), Moody's (MCO), Mastercard (MA), Visa (V), and Alphabet (GOOGL), please refer to their respective profiles on Insiderset.