Investor portfolio
AltaRock Partners
AltaRock Partners is an investment management firm associated with Mark Massey.
Linked investors: Mark Massey
US 13F portfolio
- Quarter
- Q2 2026
- Filed
- 2026-08-17
- Portfolio value
- $4,239,761,490
- Positions
- 8
- Sources
- 13F on EDGAR
13F filings show only a manager's disclosed reportable long positions; this filing contains no call or put rows — methodology & caveats.