Mark Massey – AltaRock Partners Portfolio Activity & Recent Trades (Sep 30, 2025)

As of Sep 30, 2025, the AltaRock Partners portfolio activity showed several notable changes in holdings, according to the latest SEC 13F filing reported on Nov 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 Q3 2025, the filing reported:

New Buys –

None reported

Increases – Amazon.com, Inc.

Reductions – Fair Isaac Corporation, Alphabet Inc., Hilton Worldwide Holdings Inc., Mastercard Incorporated, Moody's Corporation, and 3 more

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
Q3 2025	AMZN Amazon.com, Inc.	Amazon.com, Inc.	Buy	+1,282,347	+20.4%	$1.66B	7,558,253
Q3 2025	FICO Fair Isaac Corporation	Fair Isaac Corporation	Sell	-3	-0.4%	$998.19K	667
Q3 2025	GOOGL Alphabet Inc.	Alphabet Inc.	Sell	-701,038	-67.1%	$83.72M	344,391
Q3 2025	HLT Hilton Worldwide Holdings Inc.	Hilton Worldwide Holdings Inc.	Sell	-1,983	-0.4%	$140.78M	542,613
Q3 2025	MA Mastercard Incorporated	Mastercard Incorporated	Sell	-2,168	-0.4%	$332.23M	584,086
Q3 2025	MCO Moody's Corporation	Moody's Corporation	Sell	-3,519	-0.4%	$452.05M	948,735
Q3 2025	MSFT Microsoft Corporation	Microsoft Corporation	Sell	-9,382	-0.4%	$1.33B	2,569,267
Q3 2025	TDG Transdigm Group Incorporated	Transdigm Group Incorporated	Sell	-3,558	-0.4%	$1.29B	976,392
Q3 2025	V Visa Inc.	Visa Inc.	Sell	-1,890	-0.4%	$182.13M	533,522
Q2 2025	AMZN Amazon.com, Inc.	Amazon.com, Inc.	Buy	+1,073,491	+20.6%	$1.38B	6,275,906
Q2 2025	GOOGL Alphabet Inc.	Alphabet Inc.	Sell	-2,408,938	-69.7%	$184.24M	1,045,429
Q2 2025	HLT Hilton Worldwide Holdings Inc.	Hilton Worldwide Holdings Inc.	Buy	+270,639	+98.8%	$145.05M	544,596
Q2 2025	MCO Moody's Corporation	Moody's Corporation	Buy	+1,349	+0.1%	$477.64M	952,254
Q2 2025	V Visa Inc.	Visa Inc.	Sell	-315,000	-37.0%	$190.10M	535,412
Q1 2025	AMZN Amazon.com, Inc.	Amazon.com, Inc.	Sell	-75,905	-1.4%	$989.81M	5,202,415
Q1 2025	CHTR Charter Communications, Inc.	Charter Communications, Inc.	Sell - Position Exit	-6,025	-100.0%	$0.00	-
Q1 2025	GOOGL Alphabet Inc.	Alphabet Inc.	Sell	-26,434	-0.8%	$534.18M	3,454,367
Q1 2025	HLT Hilton Worldwide Holdings Inc.	Hilton Worldwide Holdings Inc.	Buy	+182,629	+200.0%	$62.34M	273,957
Q1 2025	MSFT Microsoft Corporation	Microsoft Corporation	Buy	+687,008	+36.3%	$968.00M	2,578,649
Q1 2025	TDG Transdigm Group Incorporated	Transdigm Group Incorporated	Sell	-20,654	-2.1%	$1.36B	979,950
Q1 2025	V Visa Inc.	Visa Inc.	Sell	-24,500	-2.8%	$298.04M	850,412
Q4 2024	AMZN Amazon.com, Inc.	Amazon.com, Inc.	Sell	-124,000	-2.3%	$1.16B	5,278,320
Q4 2024	FICO Fair Isaac Corporation	Fair Isaac Corporation	Sell	-33,982	-98.1%	$1.33M	670
Q4 2024	GOOGL Alphabet Inc.	Alphabet Inc.	Buy	+146,896	+4.4%	$658.92M	3,480,801
Q4 2024	HLT Hilton Worldwide Holdings Inc.	Hilton Worldwide Holdings Inc.	Buy - Position Entry	+91,328	-	$22.57M	91,328
Q4 2024	MA Mastercard Incorporated	Mastercard Incorporated	Sell	-33,779	-5.4%	$308.70M	586,254
Q4 2024	MCO Moody's Corporation	Moody's Corporation	Sell	-115,714	-10.8%	$450.13M	950,905
Q4 2024	MSFT Microsoft Corporation	Microsoft Corporation	Sell	-43,175	-2.2%	$797.33M	1,891,641
Q4 2024	TDG Transdigm Group Incorporated	Transdigm Group Incorporated	Sell	-47,660	-4.5%	$1.27B	1,000,604
Q4 2024	V Visa Inc.	Visa Inc.	Sell	-243,471	-21.8%	$276.51M	874,912