Mark Massey - AltaRock Partners 13F Activity & Position Changes (Q1 2018)
According to the SEC 13F filed on Aug 17, 2026, the AltaRock Partners portfolio showed several notable changes in holdings as of quarter-end Mar 31, 2018. The activity included new positions, additions to existing holdings, reductions, and complete exits, providing a clear view of how the portfolio evolved during the quarter.
During Q1 2018, the filing reported:
New Buys - Booking Holdings Inc. Common St
Increases - Charter Communications, Inc.
Reductions - Transdigm Group Incorporated, Westinghouse Air Brake Technolo
Complete Exits - None reported
These updates highlight how the portfolio adjusted across different sectors and market conditions, offering insights into allocation shifts and investment trends.