Mark Massey's Portfolio - AltaRock Partners
Get exclusive insights into Mark Massey's investment portfolio at AltaRock Partners. Explore the latest The Insider updates and full stock list on the Gotrade app
Mark Massey plays the game with a strategy best described as Extreme Concentration. He isn't interested in diversifying just to look safe; he picks the absolute best horses and bets the farm on them.
His philosophy revolves around owning wide-moat compounders that can dominate for decades. The conviction here is wild—his top three holdings alone make up nearly 80% of his entire book.
Amazon (AMZN) is his absolute kingmaker, commanding over 30% of the portfolio, flanked by massive stakes in Microsoft (MSFT) and the aerospace compounding machine TransDigm (TDG). Massey proves that if you really know what you own, you don't need a hundred different stocks to win.
Data Snapshot
- Portfolio Value: ~$5.47 Billion (Estimated Reported Value)
- Top 5 Assets:
- Amazon.com Inc (AMZN) — 30.34%
- Microsoft Corp (MSFT) — 24.33%
- TransDigm Group Inc (TDG) — 23.53%
- Moody's Corp (MCO) — 8.27%
- Mastercard Inc (MA) — 6.07%
- Top Sector: Technology (Cloud/E-commerce) & Industrials (Aerospace)
Portfolio
Update at 31 Desember 2025, from Valuesider
| Ticker | Stock | % of Portfolio | Shares* | Reported Price* | % difference Current Price | Value |
|---|---|---|---|---|---|---|
| GOOGL | ALPHABET INC-CL A | 1.53% | 344,391 | $243.10 | 🟢 28.89% | $83,721,452 |
| AMZN | AMAZONCOM INC | 30.34% | 7,558,253 | $219.57 | 🟢 5.78% | $1,659,565,611 |
| FICO | FAIR ISAAC CORP | 0.02% | 667 | $1,496.53 | 🟢 18.42% | $998,186 |
| HLT | HILTON WORLDWIDE HOLDINGS IN | 2.57% | 542,613 | $259.44 | - | $140,775,517 |
| MA | MASTERCARD INC - A | 6.07% | 584,086 | $568.81 | 🟢 1.67% | $332,233,958 |
| MSFT | MICROSOFT CORP | 24.33% | 2,569,267 | $517.95 | 🔴 5.99% | $1,330,751,843 |
| MCO | MOODY'S CORP | 8.27% | 948,735 | $476.48 | 🟢 9.07% | $452,053,253 |
| TDG | TRANSDIGM GROUP INC | 23.53% | 976,392 | $1,318.02 | 🔴 0.14% | $1,286,904,184 |
| V | VISA INC-CLASS A SHARES | 3.33% | 533,522 | $341.38 | 🟢 3.98% | $182,133,740 |
Make it yours! Start investing in these high-conviction stocks directly from your phone. Download Gotrade now!
Update at 31 Desember 2025, from Valuesider
