AltaRock Partners 13F, Q1 2026
AltaRock Partners · quarter ending 31 March 2026 · filed 15 May 2026 · SEC CIK 1631014
Common stock only: shares the fund reported owning at the quarter end, valued as filed.
Largest positions, Q1 2026
Weights are against the whole filed book. Changes are in shares held, against the Q4 2025 filing.
| Company | Ticker | Value | % of book | vs Q4 2025 |
|---|---|---|---|---|
| AMAZON.COM INC | AMZN | $1.58B | 38.2% | +4% shares |
| TRANSDIGM GROUP INC | TDG | $1.05B | 25.5% | -6% shares |
| MICROSOFT CORP | MSFT | $691.31M | 16.8% | -10% shares |
| MOODYS CORP | MCO | $376.06M | 9.1% | +6% shares |
| MASTERCARD INC-CLASS A | MA | $261.24M | 6.3% | -4% shares |
| VISA INC-CLASS A SHRS | V | $150.72M | 3.6% | -4% shares |
| ALPHABET INC-CL A | GOOGL | $12.48M | 0.3% | -74% shares |
| HILTON WORLDWIDE | HLT | $4.66M | 0.1% | -97% shares |
What changed since Q4 2025
Against the Q4 2025 filing, AltaRock Partners opened 0 new positions, added to 2, trimmed 6, left 0 unchanged and exited 0. Every position is compared, matched on its CUSIP; a change of 2% or less in shares counts as unchanged.
Other quarters
Source: SEC Form 13F-HR, accession 0001104659-26-062170, filed by ALTAROCK PARTNERS LP. Values are as filed and cover US-listed positions only; a 13F does not show short positions or holdings outside the US. A 13F may be filed up to 45 days after the quarter ends, so the fund may have traded since. Educational information, not financial advice.