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 |
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Update at 31 Desember 2025, from Valuesider
