Mark Massey - AltaRock Partners 13F Portfolio Holdings (Q2 2026)
According to the SEC 13F filed on Aug 17, 2026, the AltaRock Partners portfolio is valued at approximately $4.24B across 8 publicly traded holdings as of quarter-end Jun 30, 2026. This profile highlights the top investments led by AMAZON.COM INC (AMZN), TRANSDIGM GROUP INC (TDG), MICROSOFT CORP (MSFT), MASTERCARD INC-CLASS A (MA), and others. Explore insights into portfolio composition, sector allocation, and recent trade activity.
AltaRock Partners's stock portfolio spans 8 holdings across 5 sectors, with a total market value of $4.24B. The Consumer Cyclical sector represents the largest allocation, while the top holdings account for nearly 100% of the total portfolio value. AMAZON.COM INC remains the single largest position at 32.2% of all equity investments.
Complete Holdings
Showing 8 of 8 holdings.
| Company | Symbol | Sector | Portfolio % | Shares | Change (Shares) | Change % | Value |
|---|---|---|---|---|---|---|---|
| AMAZON.COM INC | AMZN | Consumer Cyclical | 32.21% | 5,729,972 | -1,837,974 | -24.29% | $1.37B |
| TRANSDIGM GROUP INC | TDG | Industrials | 27.51% | 875,755 | -33,413 | -3.68% | $1.17B |
| MICROSOFT CORP | MSFT | Technology | 20.54% | 2,334,482 | +466,945 | +25.00% | $870.81M |
| MASTERCARD INC-CLASS A | MA | Financial Services | 9.26% | 764,507 | +241,671 | +46.22% | $392.65M |
| VISA INC-CLASS A SHRS | V | Financial Services | 6.77% | 836,470 | +337,793 | +67.74% | $286.98M |
| MOODYS CORP | MCO | Financial Services | 3.23% | 302,624 | -559,412 | -64.89% | $137.06M |
| ALPHABET INC-CL A | GOOGL | Communication Services | 0.35% | 41,994 | -1,397 | -3.22% | $15.01M |
| HILTON WORLDWIDE | HLT | Consumer Cyclical | 0.12% | 15,202 | -139 | -0.91% | $5.02M |
Holdings by Sector
| Sector | Allocation | Value |
|---|---|---|
| Consumer Cyclical | 32.33% | $1.37B |
| Industrials | 27.51% | $1.17B |
| Technology | 20.54% | $870.81M |
| Financial Services | 19.26% | $816.70M |
| Communication Services | 0.35% | $15.01M |
Portfolio insights
According to the SEC 13F filed on Aug 17, 2026, the AltaRock Partners portfolio holds 8 securities valued at $4.24B as of quarter-end Jun 30, 2026. The Consumer Cyclical sector represents the largest allocation, while the top positions account for a significant portion of the total portfolio weight.