Altarock Partners LP
In its 13F for Q3 2025 (holdings as of September 30, 2025, filed November 14, 2025), Altarock Partners LP reported 9 stock positions worth $5.5 billion. Its top holding was Amazon.com (AMZN) at 30.3% of the portfolio, followed by Microsoft (MSFT, 24.3%) and Transdigm (TDG, 23.5%). Compared with Q2 2025, it added to 1 and reduced 8. The biggest buy was Amazon.com (AMZN, shares +20%) and the biggest sale Transdigm (TDG, shares −0%).
- Most Recent 13F
- Q2 2026
- Location
- WEST PALM BEACH, FL
- CIK
- 0001631014
- Portfolio Value
- $5.5B (Q3 2025)
- SEC Filing
- 0001104659-25-112002 ↗ filed Nov 14, 2025
Holdings Value
Holdings 9 stocks · $5.5B
| AMZN Amazon.com Inc. | 30.34% | 7,558,253 | $1.7B | Add +20.4% |
| MSFT Microsoft Corp. | 24.33% | 2,569,267 | $1.3B | Reduce -0.4% |
| TDG Transdigm Group Inc. | 23.53% | 976,392 | $1.3B | Reduce -0.4% |
| MCO Moody's Corp. | 8.27% | 948,735 | $452.1M | Reduce -0.4% |
| MA Mastercard Inc. Class A | 6.07% | 584,086 | $332.2M | Reduce -0.4% |
| V Visa Inc. Class A | 3.33% | 533,522 | $182.1M | Reduce -0.3% |
| HLT Hilton Worldwide Holdings Inc. | 2.57% | 542,613 | $140.8M | Reduce -0.4% |
| GOOGL Alphabet Inc. Class A | 1.53% | 344,391 | $83.7M | Reduce -67.1% |
| FICO Fair Isaac Corp. | 0.02% | 667 | $998K | Reduce -0.5% |
Portfolio Sells Q2 2025 → Q3 2025
| TDG Transdigm Group Inc. | Reduce -0.4% | 23.53% | −3.68 |
| GOOGL Alphabet Inc. Class A | Reduce -67.1% | 1.53% | −1.83 |
| MCO Moody's Corp. | Reduce -0.4% | 8.27% | −0.45 |
| V Visa Inc. Class A | Reduce -0.3% | 3.33% | −0.14 |
| HLT Hilton Worldwide Holdings Inc. | Reduce -0.4% | 2.57% | −0.07 |
| FICO Fair Isaac Corp. | Reduce -0.5% | 0.02% | −0.00 |
| MA Mastercard Inc. Class A | Reduce -0.4% | 6.07% | +0.06 |
| MSFT Microsoft Corp. | Reduce -0.4% | 24.33% | +0.91 |
Portfolio Buys Q2 2025 → Q3 2025
| AMZN Amazon.com Inc. | Add +20.4% | 30.34% | +5.21 |
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 |