Altarock Partners LP
In its 13F for Q2 2026 (holdings as of June 30, 2026, filed August 17, 2026), Altarock Partners LP reported 8 stock positions worth $4.2 billion. Its top holding was Amazon.com (AMZN) at 32.2% of the portfolio, followed by Transdigm (TDG, 27.5%) and Microsoft (MSFT, 20.5%). Compared with Q1 2026, it added to 3 and reduced 5. The biggest buy was Microsoft (MSFT, shares +25%) and the biggest sale Amazon.com (AMZN, shares −24%).
- Most Recent 13F
- Q2 2026
- Location
- WEST PALM BEACH, FL
- CIK
- 0001631014
- Portfolio Value
- $4.2B (Q2 2026)
- SEC Filing
- 0001104659-26-097527 ↗ filed Aug 17, 2026
Holdings Value
Holdings 8 stocks · $4.2B
| AMZN Amazon.com Inc. | 32.21% | 5,729,972 | $1.4B | Reduce -24.3% |
| TDG Transdigm Group Inc. | 27.51% | 875,755 | $1.2B | Reduce -3.7% |
| MSFT Microsoft Corp. | 20.54% | 2,334,482 | $870.8M | Add +25.0% |
| MA Mastercard Inc. Class A | 9.26% | 764,507 | $392.7M | Add +46.2% |
| V Visa Inc. Class A | 6.77% | 836,470 | $287.0M | Add +67.7% |
| MCO Moody's Corp. | 3.23% | 302,624 | $137.1M | Reduce -64.9% |
| GOOGL Alphabet Inc. Class A | 0.35% | 41,994 | $15.0M | Reduce -3.2% |
| HLT Hilton Worldwide Holdings Inc. | 0.12% | 15,202 | $5.0M | Reduce -0.9% |
Portfolio Sells Q1 2026 → Q2 2026
Portfolio Buys Q1 2026 → Q2 2026
All Filings
| Quarter | Positions | 13F Reported Value | Top Holdings |
|---|---|---|---|
| Q2 2026 | 8 | $4.2B | AMZN, TDG, MSFT, MA, V |
| Q1 2026 | 8 | $4.1B | AMZN, TDG, MSFT, MCO, MA |
| Q4 2025 | 8 | $5.1B | AMZN, TDG, MSFT, MCO, MA |
| Q3 2025 | 9 | $5.5B | AMZN, MSFT, TDG, MCO, MA |
| Q2 2025 | 9 | $5.5B | TDG, AMZN, MSFT, MCO, MA |
| Q1 2025 | 9 | $5.0B | TDG, AMZN, MSFT, GOOGL, MCO |
| Q4 2024 | 10 | $4.9B | TDG, AMZN, MSFT, GOOGL, MCO |
| Q3 2024 | 9 | $5.1B | TDG, AMZN, MSFT, GOOGL, MCO |
| Q2 2024 | 9 | $4.9B | TDG, MSFT, AMZN, GOOGL, V |
| Q1 2024Amended | 8 | $4.7B | TDG, AMZN, MSFT, GOOGL, V |