Person

Mark Massey

Featured portfolio

AltaRock Partners — latest disclosed US 13F book.

Quarter: Q1 2026
Positions: 8
Portfolio value: $4,126,337,614

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Linked portfolios

Each portfolio is a separate legal or operational book — we keep them distinct so unlike disclosures are never summed together.

AltaRock Partners

Manager

AltaRock Partners

Quarter: Q1 2026
Value: $4.1B

Featured portfolio