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)

Reductions – Visa Inc. (V), Alphabet Inc. (GOOGL)

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	Name	Type	Quantity	Value	Remaining
Q2 2024Jun 30, 2024	AMZN Amazon.com, Inc.	Amazon.com, Inc.	Sell	-75,000-1.8%	$798.02M	4,129,460
Q2 2024Jun 30, 2024	TDG Transdigm Group Incorporated	Transdigm Group Incorporated	Sell	-83,134-7.2%	$1.37B	1,073,264
Q2 2024Jun 30, 2024	GOOGL Alphabet Inc.	Alphabet Inc.	Sell	-283,000-6.6%	$728.98M	4,002,110
Q2 2024Jun 30, 2024	CHTR Charter Communications, Inc.	Charter Communications, Inc.	Sell	-498,843-98.8%	$1.80M	6,025
Q1 2024Mar 31, 2024	MA Mastercard Incorporated	Mastercard Incorporated	Sell	-1,961-0.7%	$128.60M	267,033
Q1 2024Mar 31, 2024	MCO Moody's Corporation	Moody's Corporation	Sell	-10,500-1.3%	$314.48M	800,135
Q1 2024Mar 31, 2024	V Visa Inc.	Visa Inc.	Sell	-48,770-2.7%	$496.31M	1,778,383
Q1 2024Mar 31, 2024	CHTR Charter Communications, Inc.	Charter Communications, Inc.	Sell	-68,892-12.0%	$146.73M	504,868
Q1 2024Mar 31, 2024	TDG Transdigm Group Incorporated	Transdigm Group Incorporated	Sell	-81,224-6.6%	$1.42B	1,156,398
Q1 2024Mar 31, 2024	AMZN Amazon.com, Inc.	Amazon.com, Inc.	Sell	-230,174-5.2%	$758.40M	4,204,460
Q1 2024Mar 31, 2024	MSFT Microsoft Corporation	Microsoft Corporation	Sell	-236,528-11.9%	$738.02M	1,754,186
Q1 2024Mar 31, 2024	GOOGL Alphabet Inc.	Alphabet Inc.	Sell	-574,720-11.8%	$646.75M	4,285,110
Q4 2023Dec 31, 2023	MCO Moody's Corporation	Moody's Corporation	Buy	+466,201+135.4%	$316.60M	810,635
Q4 2023Dec 31, 2023	CHTR Charter Communications, Inc.	Charter Communications, Inc.	Buy	+76,058+15.3%	$223.01M	573,760
Q4 2023Dec 31, 2023	MA Mastercard Incorporated	Mastercard Incorporated	Sell	-11,457-4.1%	$114.73M	268,994
Q4 2023Dec 31, 2023	TDG Transdigm Group Incorporated	Transdigm Group Incorporated	Sell	-72,464-5.5%	$1.25B	1,237,622
Q4 2023Dec 31, 2023	AMZN Amazon.com, Inc.	Amazon.com, Inc.	Sell	-165,600-3.6%	$673.80M	4,434,634
Q4 2023Dec 31, 2023	MSFT Microsoft Corporation	Microsoft Corporation	Sell	-220,798-10.0%	$748.59M	1,990,714
Q4 2023Dec 31, 2023	V Visa Inc.	Visa Inc.	Sell	-250,867-12.1%	$475.70M	1,827,153
Q4 2023Dec 31, 2023	GOOGL Alphabet Inc.	Alphabet Inc.	Sell	-399,392-7.6%	$678.87M	4,859,830
Q3 2023Sep 30, 2023	CHTR Charter Communications, Inc.	Charter Communications, Inc.	Buy	+98,237+24.6%	$218.90M	497,702
Q3 2023Sep 30, 2023	V Visa Inc.	Visa Inc.	Buy	+96,744+4.9%	$477.97M	2,078,020
Q3 2023Sep 30, 2023	MCO Moody's Corporation	Moody's Corporation	Buy	+82,900+31.7%	$108.90M	344,434
Q3 2023Sep 30, 2023	MA Mastercard Incorporated	Mastercard Incorporated	Sell	-14,059-4.8%	$111.03M	280,451
Q3 2023Sep 30, 2023	TDG Transdigm Group Incorporated	Transdigm Group Incorporated	Sell	-47,405-3.5%	$1.10B	1,310,086
Q3 2023Sep 30, 2023	MSFT Microsoft Corporation	Microsoft Corporation	Sell	-60,529-2.7%	$698.28M	2,211,512
Q3 2023Sep 30, 2023	GOOGL Alphabet Inc.	Alphabet Inc.	Sell	-477,378-8.3%	$688.22M	5,259,222
Q3 2023Sep 30, 2023	AMZN Amazon.com, Inc.	Amazon.com, Inc.	Sell	-506,547-9.9%	$584.78M	4,600,234
Q2 2023Jun 30, 2023	V Visa Inc.	Visa Inc.	Buy	+333,152+20.2%	$470.51M	1,981,276
Q2 2023Jun 30, 2023	TDG Transdigm Group Incorporated	Transdigm Group Incorporated	Sell	-25,633-1.9%	$1.21B	1,357,491

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