AltaRock Partners
13F Holdings and Portfolio Analysis
Mark Massey 2025 Q2 13F holdings, quarterly changes, portfolio value trend and position weight distribution.
AltaRock Partners Overview
AltaRock Partners held 9 stocks in 2025 Q2, with total market value around $5.48B.
AltaRock Partners's top five holdings in 2025 Q2: TRANSDIGM GROUP INC COM(TDG) 27.21%, Amazon.com, Inc.(AMZN) 25.14%, MICROSOFT CORP COM(MSFT) 23.42%, Moody's Corporation(MCO) 8.72%, Mastercard Incorporated(MA) 6.01%.
- Portfolio Value
- $5.48B
- Current Holdings
- 9 stocks
- New / Increased
- 0 / 3
- Reduced / Exited
- 2 / 0
Current Holdings
| 1 | TRANSDIGM GROUP INC COMTDG | 1.49 | 27.21% | 0.98 - | $1520.64 | $1251.39 -17.71% | $424.95 | 0.00 | 10.75 | +$0.81B+194.48% | Held |
| 2 | Amazon.com, Inc.AMZN | 1.38 | 25.14% | 6.28 +20.63% | $219.39 | $264.24 +20.44% | $179.03 | +1.07 | 3.50 | +$0.53B+47.59% | Increased |
| 3 | MICROSOFT CORP COMMSFT | 1.28 | 23.42% | 2.58 - | $497.41 | $460.25 -7.47% | $320.11 | 0.00 | 4.25 | +$0.36B+43.78% | Held |
| 4 | Moody's CorporationMCO | 0.48 | 8.72% | 0.95 +0.14% | $501.59 | $459.29 -8.43% | $346.87 | +0.00 | 10.75 | +$0.11B+32.41% | Increased |
| 5 | Mastercard IncorporatedMA | 0.33 | 6.01% | 0.59 - | $561.94 | $490.28 -12.75% | $371.70 | 0.00 | 10.75 | +$0.07B+31.90% | Held |
| 6 | Visa Inc.V | 0.19 | 3.47% | 0.54 -37.04% | $355.05 | $320.44 -9.75% | $216.42 | -0.32 | 10.75 | +$0.06B+48.06% | Reduced |
| 7 | ALPHABET INC CAP STK CL AGOOGL | 0.18 | 3.36% | 1.05 -69.74% | $176.23 | $375.95 +113.33% | $82.60 | -2.41 | 5.75 | +$0.31B+355.14% | Reduced |
| 8 | HILTON WORLDWIDE HLDGS INC COMHLT | 0.15 | 2.65% | 0.54 +98.79% | $266.34 | - | $250.12 | +0.27 | 0.75 | +$0.01B+6.49% | Increased |
| 9 | FAIR ISAAC CORP COMFICO | 0.00 | 0.02% | 0.00 - | $1827.96 | $1315.71 -28.02% | $1488.66 | 0.00 | 1.25 | -$0.00B-11.62% | Held |
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"Holding Period (yrs)" is the latest uninterrupted holding duration, calculated by dividing continuous reported quarters by 4.
Cost basis is an estimate and can differ materially from the actual cost, especially in edge cases.
Cost basis estimate: from the latest uninterrupted holding period, new or increased shares are added to the cost pool at the report price; reductions remove shares at the then-average cost. Example: buy 100 shares at $10 in Q1 and add 50 shares at $16 in Q2, estimated cost basis is (100 x 10 + 50 x 16) / 150 = $12 per share.
Return shows estimated dollar return on top and percentage return below. It uses current price when available, otherwise report price.
Portfolio Visuals
Track portfolio value, position weights and Top 10 history.