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ROCKWOOD RESEARCH · A CORPORATE FILINGS WEBSITE|STRAIGHT FROM THE SOURCE · SEC EDGAR|SPONSOREDYour message on this tape — bid on the Rockwood Ad Exchange · Rockwood Ad Exchange|
Rockwood Research
…

AltaRock Partners

Long Only
Manager
AltaRock
Quarter
Q2 2026
13F value
$4.24B
Positions
8
CIK
0001631014
SHARE:XLINKEDINEMAIL
Amazon.com IncAMZNHISTORY32.21%(24.3%)
Transdigm Group IncTDGHISTORY27.51%(3.7%)
Microsoft CorpMSFTHISTORY20.54%+25.0%
Mastercard Inc-Class AMAHISTORY9.26%+46.2%
Visa Inc-Class A ShrsVHISTORY6.77%+67.7%
Moodys CorpMCOHISTORY3.23%(64.9%)
Alphabet Inc-CL AGOOGLHISTORY0.35%(3.2%)
Hilton WorldwideHLTHISTORY0.12%(0.9%)
Positions are from the latest 13F-HR (period end 2026-06-30). Weights are calculated: position value ÷ the 13F book. Schedule 13D/13G stakes are merged in when present (shares and percent of class, no dollar value). Chg Shares and % Chg compare with the adjacent prior quarter's 13F only. % Out is either calculated (position shares ÷ issuer shares outstanding from the issuer's XBRL cover page; weighted-average basic shares as a fallback) or reported (percent of class on a Schedule 13D/13G newer than the 13F period) — hover a value for its source and date. Unavailable figures show “—”, never an estimate. Methodology