AltaRock Partners
Mark MasseyWEST PALM BEACH, FLfiles as ALTAROCK PARTNERS LP
$4.2bn in 8 US stocks at the end of 30 June 2026. The top 10 are 100.0% of the money. It changed about 11.9% of the portfolio this quarter.
Value
$4.2bn
Stocks
8
Top 10 share
100.0%
Turnover
11.9%
What changed this quarter
New
Bought for the first time this quarter.
None this quarter.
Added
Bought more of a stock they already held.
- MicrosoftMSFT20.5% of the fund+25%
- MastercardMA9.3% of the fund+46%
- VisaV6.8% of the fund+68%
Cut
Sold some of their stake.
- Amazon.comAMZN32.2% of the fund-24%
- TransDigm GroupTDG27.5% of the fund-4%
- Moody'sMCO3.2% of the fund-65%
- AlphabetGOOGL0.4% of the fund-3%
Sold out
Sold their entire stake.
None this quarter.
Holdings
| Company | Share of fund | Value | Shares | Change |
|---|---|---|---|---|
| Amazon.comAMZN | 32.2% | $1.4bn | 5,729,972 | -24% |
| TransDigm GroupTDG | 27.5% | $1.2bn | 875,755 | -4% |
| MicrosoftMSFT | 20.5% | $871m | 2,334,482 | +25% |
| MastercardMA | 9.3% | $393m | 764,507 | +46% |
| VisaV | 6.8% | $287m | 836,470 | +68% |
| Moody'sMCO | 3.2% | $137m | 302,624 | -65% |
| AlphabetGOOGL | 0.4% | $15m | 41,994 | -3% |
| Hilton Worldwide HoldingsHLT | 0.1% | $5m | 15,202 | Held |
Over time and by industry
Value over time
Jun '25
Dec '25
Jun '26
Value is down 22.6% since 30 June 2025.
Where the money is
Retail & consumer32.3%
Industrials27.5%
Technology20.5%
Financial services19.3%
Media & telecom0.4%
From the fund's 13F filings. They list US stocks and options only, 45 days after each quarter, and leave out cash, bonds, shorts and foreign shares.