Mark Massey – AltaRock Partners Portfolio Activity & Recent Trades (Jun 30, 2025)
As of Jun 30, 2025, the AltaRock Partners portfolio activity showed several notable changes in holdings, according to the latest SEC 13F filing reported on Aug 14, 2025. 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 Q2 2025, the filing reported:
New Buys – None reported
Increases – Amazon.com, Inc. (AMZN), Hilton Worldwide Holdings Inc. (HLT), Moody's Corporation (MCO)
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.
AltaRock Partners Activity
| Date | Symbol | Type | Quantity |
|---|---|---|---|
Q2 2019Jun 30, 2019 | CHTR Charter Communications, Inc. | Buy | +94,316+11.0% |
Q2 2019Jun 30, 2019 | TDG Transdigm Group Incorporated | Sell | -36,561-5.7% |
Q4 2018Dec 31, 2018 | MCO Moody's Corporation | Buy | +163,354+16.9% |
Q4 2018Dec 31, 2018 | TDG Transdigm Group Incorporated | Buy | +108,054+20.2% |
Q4 2018Dec 31, 2018 | CHTR Charter Communications, Inc. | Buy | +93,252+12.2% |
Q4 2018Dec 31, 2018 | MA Mastercard Incorporated | Sell | -1,350-0.3% |
Q4 2018Dec 31, 2018 | ORLY O'Reilly Automotive, Inc. | Sell | -4,900-1.6% |
Q4 2018Dec 31, 2018 | BKNG Booking Holdings Inc. Common St | Sell - Position Exit | -120,083-100.0% |
Q3 2018Sep 30, 2018 | CHTR Charter Communications, Inc. | Buy | +80,200+11.7% |
Q3 2018Sep 30, 2018 | BKNG Booking Holdings Inc. Common St | Buy | +16,600+16.0% |
Q3 2018Sep 30, 2018 | ORLY O'Reilly Automotive, Inc. | Sell | -19,450-5.8% |
Q2 2018Jun 30, 2018 | ORLY O'Reilly Automotive, Inc. | Buy - Position Entry | +333,079 |
Q2 2018Jun 30, 2018 | CHTR Charter Communications, Inc. | Buy | +96,884+16.4% |
Q2 2018Jun 30, 2018 | BKNG Booking Holdings Inc. Common St | Buy | +1,300+1.3% |
Q2 2018Jun 30, 2018 | WAB Westinghouse Air Brake Technolo | Sell - Position Exit | -666,426-100.0% |
Q1 2018Mar 31, 2018 | CHTR Charter Communications, Inc. | Buy | +151,411+34.6% |
Q1 2018Mar 31, 2018 | BKNG Booking Holdings Inc. Common St | Buy - Position Entry | +102,183 |
Q1 2018Mar 31, 2018 | WAB Westinghouse Air Brake Technolo | Sell | -20,000-2.9% |
Q1 2018Mar 31, 2018 | TDG Transdigm Group Incorporated | Sell | -45,100-7.8% |
Q4 2017Dec 31, 2017 | CHTR Charter Communications, Inc. | Buy | +205,530+88.4% |
Q4 2017Dec 31, 2017 | TDG Transdigm Group Incorporated | Sell | -67,000-10.4% |
Q4 2017Dec 31, 2017 | MCO Moody's Corporation | Sell | -115,529-10.7% |
Q3 2017Sep 30, 2017 | TDG Transdigm Group Incorporated | Buy | +74,367+13.0% |
Q3 2017Sep 30, 2017 | CHTR Charter Communications, Inc. | Sell | -177,964-43.3% |
Q2 2017Jun 30, 2017 | TDG Transdigm Group Incorporated | Buy | +36,094+6.7% |
Q2 2017Jun 30, 2017 | CHTR Charter Communications, Inc. | Buy | +25,000+6.5% |
Q1 2017Mar 31, 2017 | MCO Moody's Corporation | Buy | +4,100+0.4% |
Q1 2017Mar 31, 2017 | WAB Westinghouse Air Brake Technolo | Sell | -3,400-0.5% |
Q1 2017Mar 31, 2017 | MA Mastercard Incorporated | Sell | -5,400-1.3% |
Q1 2017Mar 31, 2017 | TDG Transdigm Group Incorporated | Sell | -55,434-9.4% |