MM
Mark Massey
AltaRock Partners LP
- Portfolio value
- $4,239,761,490
- Stocks
- 8
- Period
- Q2 2026
- Filed
- 17 Aug 2026
Ultra-concentrated quality-value with very few positions and multi-year holding periods.
✦
Cut Moody'S Corp 64.9% and added 68% to Visa Inc-Class A Shares. Consumer Cyclical is still the biggest weight in the book at 32.3%. The top five names are 96% of it.
Sector exposure
Consumer Cyclical
32.3%
Industrials
27.5%
Technology
20.5%
Financial Services
19.3%
Communication Services
0.4%
Concentration
32.2%Largest, AMZN
96%Top 5
100%Top 10
5Positions over 5%
2Under 1%, 0% of the book
Portfolio return
Time-weighted · held at window start
By position
By sector
| Stock | % Portfolio | Recent Activity | Shares | Reported Price | Value | |
|---|---|---|---|---|---|---|
| AMZN — Amazon Com Inc | 32.21% | Reduce 24.29% | 5,729,972 | $238.34 | $1,365,681,526 | ↗ ◎ |
| TDG — Transdigm Group Inc | 27.51% | Reduce 3.68% | 875,755 | $1332.04 | $1,166,540,690 | ↗ ◎ |
| MSFT — Microsoft Corp | 20.54% | Add 25.00% | 2,334,482 | $373.02 | $870,808,476 | ↗ ◎ |
| MA — Mastercard Inc - A | 9.26% | Add 46.22% | 764,507 | $513.60 | $392,650,795 | ↗ ◎ |
| V — Visa Inc-Class A Shares | 6.77% | Add 67.74% | 836,470 | $343.09 | $286,984,492 | ↗ ◎ |
| MCO — Moody's Corp | 3.23% | Reduce 64.89% | 302,624 | $452.92 | $137,064,462 | ↗ ◎ |
| GOOGL — Alphabet Inc Cl A | 0.35% | Reduce 3.22% | 41,994 | $357.37 | $15,007,396 | ↗ ◎ |
| HLT — Hilton Worldwide Holdings In | 0.12% | Reduce 0.91% | 15,202 | $330.46 | $5,023,653 | ↗ ◎ |