Altarock Partners LP
In its 13F for Q4 2025 (holdings as of December 31, 2025, filed February 13, 2026), Altarock Partners LP reported 8 stock positions worth $5.1 billion. Its top holding was Amazon.com (AMZN) at 33.1% of the portfolio, followed by Transdigm (TDG, 25.3%) and Microsoft (MSFT, 19.7%). Compared with Q3 2025, it sold out of 1 and reduced 7. The biggest sale was Microsoft (MSFT, shares −19%).
- Most Recent 13F
- Q2 2026
- Location
- WEST PALM BEACH, FL
- CIK
- 0001631014
- Portfolio Value
- $5.1B (Q4 2025)
- SEC Filing
- 0001104659-26-015359 ↗ filed Feb 13, 2026
Holdings Value
Holdings 8 stocks · $5.1B
| AMZN Amazon.com Inc. | 33.10% | 7,314,534 | $1.7B | Reduce -3.2% |
| TDG Transdigm Group Inc. | 25.28% | 969,400 | $1.3B | Reduce -0.7% |
| MSFT Microsoft Corp. | 19.75% | 2,082,357 | $1.0B | Reduce -18.9% |
| MCO Moody's Corp. | 8.16% | 814,503 | $416.1M | Reduce -14.2% |
| MA Mastercard Inc. Class A | 6.07% | 541,836 | $309.3M | Reduce -7.2% |
| V Visa Inc. Class A | 3.55% | 516,677 | $181.2M | Reduce -3.2% |
| HLT Hilton Worldwide Holdings Inc. | 3.06% | 542,613 | $155.9M | No change |
| GOOGL Alphabet Inc. Class A | 1.04% | 169,391 | $53.0M | Reduce -50.8% |
Portfolio Sells Q3 2025 → Q4 2025
| MSFT Microsoft Corp. | Reduce -18.9% | 19.75% | −4.59 |
| GOOGL Alphabet Inc. Class A | Reduce -50.8% | 1.04% | −0.49 |
| MCO Moody's Corp. | Reduce -14.2% | 8.16% | −0.11 |
| FICO Fair Isaac Corp. | Sold out | 0.00% | −0.02 |
| MA Mastercard Inc. Class A | Reduce -7.2% | 6.07% | −0.01 |
| V Visa Inc. Class A | Reduce -3.2% | 3.55% | +0.22 |
| TDG Transdigm Group Inc. | Reduce -0.7% | 25.28% | +1.75 |
| AMZN Amazon.com Inc. | Reduce -3.2% | 33.10% | +2.76 |
Portfolio Buys Q3 2025 → Q4 2025
| None this quarter. | |||
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 |