SEC EDGAR Form 13F
AltaRock Partners
AltaRock Partners is an institutional investment manager identified in SEC EDGAR Form 13F data.
Latest Form 13F: 8 long U.S. equity positions, $4.1B reported value for the period ended Mar 31, 2026, led by AMAZON.COM INC, TRANSDIGM GROUP INC, and MICROSOFT CORP.
CIK: 1631014 · Filed: May 15, 2026 · Period: Mar 31, 2026
Reported value
$4.1B
Positions
8
Key person
13F reporting manager
Style
Institutional 13F
Top holding
AMZN · AMAZON.COM INC
Period
Mar 31, 2026
Filed
May 15, 2026
CIK
1631014
What a 13F does not show
Form 13F covers many reportable long U.S. equity positions at quarter end. It does not show every asset type, short positions, hedges, intraperiod trades, or current holdings after the report date. Use it as ownership context, not investment advice.
Read the 13F guide →AMZN
AMAZON.COM INC
Portfolio weight
38.20%
TDG
TRANSDIGM GROUP INC
Portfolio weight
25.54%
MSFT
MICROSOFT CORP
Portfolio weight
16.75%
MCO
MOODYS CORP
Portfolio weight
9.11%
MA
MASTERCARD INC-CLASS A
Portfolio weight
6.33%
Top reported holdings
Showing the top 8 positions by reported value. Source: SEC EDGAR Form 13F; period 2026-03-31; filed 2026-05-15.
| # | Ticker | Company | Shares | Value | Portfolio % | QoQ change |
|---|---|---|---|---|---|---|
| 1 | AMZN | AMAZON.COM INC | 7.6M | $1.6B | 38.20% | +3.5% |
| 2 | TDG | TRANSDIGM GROUP INC | 909.2K | $1.1B | 25.54% | -6.2% |
| 3 | MSFT | MICROSOFT CORP | 1.9M | $691M | 16.75% | -10.3% |
| 4 | MCO | MOODYS CORP | 862.0K | $376M | 9.11% | +5.8% |
| 5 | MA | MASTERCARD INC-CLASS A | 522.8K | $261M | 6.33% | -3.5% |
| 6 | V | VISA INC-CLASS A SHRS | 498.7K | $151M | 3.65% | -3.5% |
| 7 | GOOGL | ALPHABET INC-CL A | 43.4K | $12M | 0.30% | -74.4% |
| 8 | HLT | HILTON WORLDWIDE | 15.3K | $5M | 0.11% | -97.2% |
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