# Mark Massey — AltaRock Partners

Portfolio USD 4,239,761,000 · 8 positions · 2026 Q2 · history from 2019 Q1.
Source: quarterly 13F filings via dataroma.com. Page: https://gigainvestors.com/AP

## Positions (2026 Q2)

| Ticker | Company | % of portfolio | Value | This quarter | Holders |
|---|---|---:|---:|---|---:|
| AMZN | Amazon.com Inc. | 32% | USD 1,365,682,000 | -24.29% |  |
| TDG | TransDigm Group Inc. | 28% | USD 1,166,541,000 | -3.68% |  |
| MSFT | Microsoft Corp. | 21% | USD 870,808,000 | +25% |  |
| MA | Mastercard Inc. | 9.3% | USD 392,651,000 | +46.22% |  |
| V | Visa Inc. | 6.8% | USD 286,984,000 | +67.74% |  |
| MCO | Moody's Corp. | 3.2% | USD 137,064,000 | -64.89% |  |
| GOOGL | Alphabet Inc. | 0.4% | USD 15,007,000 | -3.22% |  |
| HLT | Hilton Worldwide Holdings | 0.1% | USD 5,024,000 | -0.91% |  |

## Moves this quarter (8)

- AMZN Amazon.com Inc.: -24.29% (USD 1,365,682,000)
- TDG TransDigm Group Inc.: -3.68% (USD 1,166,541,000)
- MSFT Microsoft Corp.: +25% (USD 870,808,000)
- MA Mastercard Inc.: +46.22% (USD 392,651,000)
- V Visa Inc.: +67.74% (USD 286,984,000)
- MCO Moody's Corp.: -64.89% (USD 137,064,000)
- GOOGL Alphabet Inc.: -3.22% (USD 15,007,000)
- HLT Hilton Worldwide Holdings: -0.91% (USD 5,024,000)

## Portfolio value by quarter

- 2019 Q1: USD 1,052,342,365 (6 positions)
- 2019 Q2: USD 1,159,011,437 (6 positions)
- 2019 Q3: USD 1,154,014,057 (6 positions)
- 2019 Q4: USD 1,616,710,219 (7 positions)
- 2020 Q1: USD 1,574,904,725 (6 positions)
- 2020 Q2: USD 1,950,718,072 (6 positions)
- 2020 Q3: USD 2,120,088,182 (6 positions)
- 2020 Q4: USD 2,385,731,818 (7 positions)
- 2021 Q1: USD 2,630,445,594 (7 positions)
- 2021 Q2: USD 3,613,078,360 (8 positions)
- 2021 Q3: USD 3,707,520,334 (8 positions)
- 2021 Q4: USD 3,793,696,848 (8 positions)
- 2022 Q1: USD 3,922,052,385 (9 positions)
- 2022 Q2: USD 3,240,802,756 (8 positions)
- 2022 Q3: USD 3,054,593,233 (8 positions)
- 2022 Q4: USD 3,181,857,520 (8 positions)
- 2023 Q1: USD 3,651,058,915 (8 positions)
- 2023 Q2: USD 4,164,392,265 (8 positions)
- 2023 Q3: USD 3,992,259,761 (8 positions)
- 2023 Q4: USD 4,483,273,009 (8 positions)
- 2024 Q1: USD 4,653,040,810 (8 positions)
- 2024 Q2: USD 4,858,528,399 (9 positions)
- 2024 Q3: USD 5,076,773,351 (9 positions)
- 2024 Q4: USD 4,943,610,864 (10 positions)
- 2025 Q1: USD 4,974,318,538 (9 positions)
- 2025 Q2: USD 5,477,355,325 (9 positions)
- 2025 Q3: USD 5,469,684,525 (9 positions)
- 2025 Q4: USD 5,099,557,816 (8 positions)
- 2026 Q1: USD 4,126,750,876 (8 positions)
- 2026 Q2: USD 4,239,761,000 (8 positions)