AltaRock Partners Portfolio - Jun 30, 2025
AltaRock Partners, Mark Massey, has built a diversified portfolio of 9 publicly traded holdings with a total market value of $5.5B as of Jun 30, 2025. This comprehensive analysis examines the latest 13F filing data to understand the investment strategy and recent portfolio adjustments.
The portfolio demonstrates a concentrated approach to stock selection, with the top holding representing 27.2% of the total portfolio value. The top 5 holdings account for 90.5% of the overall portfolio allocation.
Recent portfolio activity shows 10 significant position adjustments, indicating active portfolio management and strategic repositioning. These changes reflect the investor's response to market conditions and evolving investment thesis.
Portfolio Statistics
Top Holdings Analysis
The portfolio's top holdings reveal the investor's core investment thesis and sector preferences. The largest position in TRANSDIGM GROUP INC (TDG) represents 27.2% of the total portfolio, valued at $1.5B.
| Rank | Symbol | Company | Value | Portfolio % | Change |
|---|---|---|---|---|---|
| 1 | TDG | TRANSDIGM GROUP INC | $1.5B | 27.2% | - |
| 2 | AMZN | AMAZON.COM INC | $1.4B | 25.1% | +20.6% |
| 3 | MSFT | MICROSOFT CORP | $1.3B | 23.4% | - |
| 4 | MCO | MOODYS CORP | $477.6M | 8.7% | +0.1% |
| 5 | MA | MASTERCARD INC-CLASS A | $329.4M | 6.0% | - |
For a complete analysis of all holdings and detailed portfolio breakdown by sector and market cap, visit our comprehensive holdings page.
Recent Portfolio Activity
Recent portfolio adjustments provide insights into the investor's evolving strategy and market outlook.
The following table shows the top 10 most significant position changes from recent reporting periods (out of 152 total transactions), sorted by the magnitude of change.
For a complete history of all portfolio transactions and detailed activity analysis,
visit our comprehensive activity page.
| Symbol | Company | Quantity Change | Date | Action |
|---|---|---|---|---|
| GOOGL | Alphabet Inc. | -2,408,938 | Jun 30, 2025 | SELL |
| AMZN | Amazon.com, Inc. | +1,073,491 | Jun 30, 2025 | BUY |
| V | Visa Inc. | -315,000 | Jun 30, 2025 | SELL |
| HLT | Hilton Worldwide Holdings Inc. | +270,639 | Jun 30, 2025 | BUY |
| MCO | Moody's Corporation | +1,349 | Jun 30, 2025 | BUY |
| MSFT | Microsoft Corporation | +687,008 | Mar 31, 2025 | BUY |
| HLT | Hilton Worldwide Holdings Inc. | +182,629 | Mar 31, 2025 | BUY |
| AMZN | Amazon.com, Inc. | -75,905 | Mar 31, 2025 | SELL |
| GOOGL | Alphabet Inc. | -26,434 | Mar 31, 2025 | SELL |
| V | Visa Inc. | -24,500 | Mar 31, 2025 | SELL |
Investment Strategy Insights
AltaRock Partners's investment approach can be analyzed through several key metrics. The portfolio's concentration in top holdings suggests a high-conviction investment strategy, with significant positions in companies that align with the investor's long-term thesis.
The largest position in TRANSDIGM GROUP INC (TDG) demonstrates strong conviction in this particular investment opportunity. indicating active portfolio management and strategic positioning.
Portfolio turnover can be assessed through recent activity patterns. The 10 most significant transactions shown here (out of 152 total transactions) suggest a highly active approach to portfolio management, with frequent strategic adjustments and position changes.
Additional Analysis
Complete Holdings
View all 9 holdings with detailed analysis
Trading Activity
Track all portfolio transactions and position changes
Performance Metrics
Analyze profit, winning trades, and investment returns
Sector Allocation
Analyze portfolio breakdown by sector and industry
AltaRock Partners's portfolio as of Jun 30, 2025 reflects a strategic approach to equity investing with 9 holdings valued at $5.5B. The concentrated position in TRANSDIGM GROUP INC and other top holdings demonstrates the investor's confidence in specific investment themes and long-term value creation opportunities. Recent activity indicates ongoing portfolio optimization and strategic repositioning.
For the most current portfolio data and detailed analysis, refer to the latest SEC 13F filings and our comprehensive holdings and activity pages, which are updated regularly with the latest filing information.
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