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 2023Jun 30, 2023	MSFT Microsoft Corporation	Microsoft Corporation	Sell	-59,888-2.6%	$773.72M	2,272,041
Q2 2023Jun 30, 2023	GOOGL Alphabet Inc.	Alphabet Inc.	Sell	-545,817-8.7%	$686.67M	5,736,600
Q2 2023Jun 30, 2023	AMZN Amazon.com, Inc.	Amazon.com, Inc.	Sell	-758,170-12.9%	$665.72M	5,106,781
Q1 2023Mar 31, 2023	AMZN Amazon.com, Inc.	Amazon.com, Inc.	Buy	+220,581+3.9%	$605.79M	5,864,951
Q1 2023Mar 31, 2023	CHTR Charter Communications, Inc.	Charter Communications, Inc.	Buy	+65,000+19.4%	$142.85M	399,465
Q1 2023Mar 31, 2023	MA Mastercard Incorporated	Mastercard Incorporated	Sell	-6,500-2.2%	$107.03M	294,510
Q1 2023Mar 31, 2023	V Visa Inc.	Visa Inc.	Sell	-26,000-1.6%	$371.59M	1,648,124
Q1 2023Mar 31, 2023	TDG Transdigm Group Incorporated	Transdigm Group Incorporated	Sell	-26,600-1.9%	$1.02B	1,383,124
Q1 2023Mar 31, 2023	GOOGL Alphabet Inc.	Alphabet Inc.	Sell	-148,000-2.3%	$651.68M	6,282,417
Q1 2023Mar 31, 2023	MSFT Microsoft Corporation	Microsoft Corporation	Sell	-228,200-8.9%	$672.30M	2,331,929
Q4 2022Dec 31, 2022	AMZN Amazon.com, Inc.	Amazon.com, Inc.	Buy	+2,350,336+71.4%	$474.13M	5,644,370
Q4 2022Dec 31, 2022	MCO Moody's Corporation	Moody's Corporation	Buy	+8,926+3.5%	$72.87M	261,534
Q4 2022Dec 31, 2022	CHTR Charter Communications, Inc.	Charter Communications, Inc.	Sell	-10,940-3.2%	$113.42M	334,465
Q4 2022Dec 31, 2022	MA Mastercard Incorporated	Mastercard Incorporated	Sell	-27,153-8.3%	$104.67M	301,010
Q4 2022Dec 31, 2022	V Visa Inc.	Visa Inc.	Sell	-59,981-3.5%	$347.82M	1,674,124
Q4 2022Dec 31, 2022	TDG Transdigm Group Incorporated	Transdigm Group Incorporated	Sell	-92,655-6.2%	$887.63M	1,409,724
Q4 2022Dec 31, 2022	MSFT Microsoft Corporation	Microsoft Corporation	Sell	-258,380-9.2%	$613.97M	2,560,129
Q4 2022Dec 31, 2022	GOOGL Alphabet Inc.	Alphabet Inc.	Sell	-573,183-8.2%	$567.36M	6,430,417
Q3 2022Sep 30, 2022	GOOGL Alphabet Inc.	Alphabet Inc.	Buy	+6,665,470+1971.3%	$669.89K	7,003,600
Q3 2022Sep 30, 2022	AMZN Amazon.com, Inc.	Amazon.com, Inc.	Buy	+229,614+7.5%	$372.23K	3,294,034
Q3 2022Sep 30, 2022	V Visa Inc.	Visa Inc.	Buy	+165,703+10.6%	$308.06K	1,734,105
Q3 2022Sep 30, 2022	MCO Moody's Corporation	Moody's Corporation	Buy	+129,298+104.9%	$61.41K	252,608
Q3 2022Sep 30, 2022	MSFT Microsoft Corporation	Microsoft Corporation	Buy	+86,500+3.2%	$656.43K	2,818,509
Q3 2022Sep 30, 2022	MA Mastercard Incorporated	Mastercard Incorporated	Buy	+79,714+32.1%	$93.31K	328,163
Q3 2022Sep 30, 2022	TDG Transdigm Group Incorporated	Transdigm Group Incorporated	Buy	+43,700+3.0%	$788.48K	1,502,379
Q3 2022Sep 30, 2022	CHTR Charter Communications, Inc.	Charter Communications, Inc.	Sell	-237,146-40.7%	$104.78K	345,405
Q2 2022Jun 30, 2022	AMZN Amazon.com, Inc.	Amazon.com, Inc.	Buy	+2,937,174+2308.3%	$325.47K	3,064,420
Q2 2022Jun 30, 2022	MSFT Microsoft Corporation	Microsoft Corporation	Buy	+96,700+3.7%	$701.66K	2,732,009
Q2 2022Jun 30, 2022	V Visa Inc.	Visa Inc.	Buy	+72,300+4.8%	$308.80K	1,568,402
Q2 2022Jun 30, 2022	TDG Transdigm Group Incorporated	Transdigm Group Incorporated	Buy	+37,400+2.6%	$782.83K	1,458,679

Page 3 of 8 • 219 total trades

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