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Q2 2026 7/58 funds filed
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Investor portfolio

AltaRock Partners

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AltaRock Partners is an investment management firm associated with Mark Massey.

Linked investors: Mark Massey

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US 13F portfolio

Quarter
Q1 2026
Filed
2026-05-15
Portfolio value
$4,126,337,614
Positions
8
history Ticker Change % of portfolio
AMZN +4% 38.2%
TDG −6% 25.54%
MSFT −10% 16.75%
MCO +6% 9.11%
MA −4% 6.33%
V −4% 3.65%
GOOG(L) −74% 0.3%
HLT −97% 0.11%

13F filings show only a fund's disclosed US-listed long book — methodology & caveats.