Mark Massey's Portfolio Update: March 31, 2026
Mark Massey of AltaRock Partners held a portfolio worth $4.13 billion as of March 31, 2026, with significant changes in holdings like Amazon and Transdigm Group.
Mark Massey, through his investment firm AltaRock Partners, held a portfolio worth $4.13 billion as of March 31, 2026.
Amazon.com Inc (AMZN) saw an increase in shares and value, rising by 3.46% in the portfolio. Transdigm Group Inc (TDG) experienced a decrease, falling by 6.21%. Microsoft Corp (MSFT) also decreased by 10.32%. Moody's Corp (MCO) and Mastercard Inc (MA) saw modest increases. Visa Inc (V) decreased slightly. Alphabet Inc (GOOGL) and Hilton Worldwide (HLT) saw significant decreases in their portfolio allocations.
Mr. Massey's portfolio was heavily weighted towards Technology and Consumer Cyclical sectors, with Amazon.com Inc (AMZN) being the largest holding at 38.2% allocation.