Mark Massey - AltaRock Partners 13F Activity & Position Changes (Q1 2018)

As of Mar 31, 2018, the AltaRock Partners portfolio activity showed several notable changes in holdings, according to the latest SEC 13F filing reported on May 15, 2026. 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.

Date	Symbol	Name	Type	Change Qty	% Change	Value	Remaining
Q1 2018	BKNG Booking Holdings Inc. Common St	Booking Holdings Inc. Common St	Buy - Position Entry	+102,183	-	$212.58K	102,183
Q1 2018	CHTR Charter Communications, Inc.	Charter Communications, Inc.	Buy	+151,411	+34.6%	$183.47K	589,514
Q1 2018	TDG Transdigm Group Incorporated	Transdigm Group Incorporated	Sell	-45,100	-7.8%	$164.04K	534,431
Q1 2018	WAB Westinghouse Air Brake Technolo	Westinghouse Air Brake Technolo	Sell	-20,000	-2.9%	$54.25K	666,426