Mark Massey, AltaRock Partners
Portfolio USD 4,239,761,000 across 8 positions as of 2026 Q2; history from 2019 Q1. Source: quarterly 13F filings via dataroma.com.
Positions, 2026 Q2
- AMZN Amazon.com Inc.: 32% of portfolio, USD 1,365,682,000, reduce -24.29%
- TDG TransDigm Group Inc.: 28% of portfolio, USD 1,166,541,000, reduce -3.68%
- MSFT Microsoft Corp.: 21% of portfolio, USD 870,808,000, add +25%
- MA Mastercard Inc.: 9.3% of portfolio, USD 392,651,000, add +46.22%
- V Visa Inc.: 6.8% of portfolio, USD 286,984,000, add +67.74%
- MCO Moody's Corp.: 3.2% of portfolio, USD 137,064,000, reduce -64.89%
- GOOGL Alphabet Inc.: 0.4% of portfolio, USD 15,007,000, reduce -3.22%
- HLT Hilton Worldwide Holdings: 0.1% of portfolio, USD 5,024,000, reduce -0.91%
Portfolio value, all published quarters
- 2019 Q1: USD 1,052,342,365
- 2019 Q2: USD 1,159,011,437
- 2019 Q3: USD 1,154,014,057
- 2019 Q4: USD 1,616,710,219
- 2020 Q1: USD 1,574,904,725
- 2020 Q2: USD 1,950,718,072
- 2020 Q3: USD 2,120,088,182
- 2020 Q4: USD 2,385,731,818
- 2021 Q1: USD 2,630,445,594
- 2021 Q2: USD 3,613,078,360
- 2021 Q3: USD 3,707,520,334
- 2021 Q4: USD 3,793,696,848
- 2022 Q1: USD 3,922,052,385
- 2022 Q2: USD 3,240,802,756
- 2022 Q3: USD 3,054,593,233
- 2022 Q4: USD 3,181,857,520
- 2023 Q1: USD 3,651,058,915
- 2023 Q2: USD 4,164,392,265
- 2023 Q3: USD 3,992,259,761
- 2023 Q4: USD 4,483,273,009
- 2024 Q1: USD 4,653,040,810
- 2024 Q2: USD 4,858,528,399
- 2024 Q3: USD 5,076,773,351
- 2024 Q4: USD 4,943,610,864
- 2025 Q1: USD 4,974,318,538
- 2025 Q2: USD 5,477,355,325
- 2025 Q3: USD 5,469,684,525
- 2025 Q4: USD 5,099,557,816
- 2026 Q1: USD 4,126,750,876
- 2026 Q2: USD 4,239,761,000