AltaRock Partners portfolio — 13F holdings Q2 2026
AltaRock Partners (Mark Massey) reported 8 long positions worth $4.2 billion as of 2026-06-30. Top holdings: AMAZON COM INC, TransDigm Group INC, MICROSOFT CORP, Mastercard Inc, VISA INC.. Quarterly changes and source links to the original SEC 13F filings. Long options are listed separately in the interactive view.
Reported share positions (up to 20)
| Company | Report period | Value | Portfolio weight | Change | Source |
|---|---|---|---|---|---|
| AMAZON COM INC | 2026-06-30 | 1365681526.00 USD | 32.21% | reduce | Original filing |
| TransDigm Group INC | 2026-06-30 | 1166540690.00 USD | 27.51% | reduce | Original filing |
| MICROSOFT CORP | 2026-06-30 | 870808476.00 USD | 20.54% | add | Original filing |
| Mastercard Inc | 2026-06-30 | 392650795.00 USD | 9.26% | add | Original filing |
| VISA INC. | 2026-06-30 | 286984492.00 USD | 6.77% | add | Original filing |
| MOODYS CORP /DE/ | 2026-06-30 | 137064462.00 USD | 3.23% | reduce | Original filing |
| Alphabet Inc. | 2026-06-30 | 15007396.00 USD | 0.35% | reduce | Original filing |
| Hilton Worldwide Holdings Inc. | 2026-06-30 | 5023653.00 USD | 0.12% | reduce | Original filing |
Recent source filings (up to 20)
| Report period | Filed | Form | Source |
|---|---|---|---|
| 2026-06-30 | 2026-08-17 00:00:00 | 13F-HR | Original filing |
| 2026-03-31 | 2026-05-15 00:00:00 | 13F-HR | Original filing |
| 2025-12-31 | 2026-02-13 00:00:00 | 13F-HR | Original filing |
| 2025-09-30 | 2025-11-14 00:00:00 | 13F-HR | Original filing |
| 2025-06-30 | 2025-08-14 00:00:00 | 13F-HR | Original filing |
| 2025-03-31 | 2025-05-14 00:00:00 | 13F-HR | Original filing |
| 2024-12-31 | 2025-02-14 00:00:00 | 13F-HR | Original filing |
| 2024-09-30 | 2024-11-13 00:00:00 | 13F-HR | Original filing |
| 2024-06-30 | 2024-08-14 00:00:00 | 13F-HR | Original filing |
| 2024-03-31 | 2024-05-15 00:00:00 | 13F-HR | Original filing |
| 2024-03-31 | 2024-05-21 00:00:00 | 13F-HR/A | Original filing |
| 2023-12-31 | 2024-02-15 00:00:00 | 13F-HR | Original filing |
| 2023-09-30 | 2023-11-14 00:00:00 | 13F-HR | Original filing |
| 2023-06-30 | 2023-08-14 00:00:00 | 13F-HR | Original filing |
| 2023-03-31 | 2023-05-16 00:00:00 | 13F-HR | Original filing |
| 2022-12-31 | 2023-02-13 00:00:00 | 13F-HR | Original filing |
| 2022-09-30 | 2022-11-14 00:00:00 | 13F-HR | Original filing |
| 2022-06-30 | 2022-08-12 00:00:00 | 13F-HR | Original filing |
| 2022-03-31 | 2022-05-13 00:00:00 | 13F-HR | Original filing |
| 2021-12-31 | 2022-02-14 00:00:00 | 13F-HR | Original filing |
Public disclosures can be delayed, incomplete, or amended. Report period describes a position date; transaction date describes a reported transaction; filed describes submission. A recent filing or page update does not establish a current holding. A dash means unavailable or not comparable, not zero.
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