Altarock Partners portfolio
Concentrated managerInvestment firmPortfolio as of Jun 30, 2026 (Q2 2026) · filed with the SEC on Aug 17, 2026 · data updated on Nov 5, 2026 · Q2 2026 13F (filing) ↗ · all its 13F filings ↗
A 13F shows the portfolio at quarter-end and is filed up to 45 days later: these are not real-time positions and they may have changed.
Altarock Partners reported a $4.2 bn portfolio of 8 positions to the SEC as of the end of Q2 2026. Its largest positions are AMZN, TDG, MSFT.
Sections with a free account
What changed this quarter
7 positions with a change (3 added to, 4 trimmed). 6 are listed here: those of 0.5 points of the portfolio or more (up to 12).
- Amazon.com−24%fewer sharesReduced38.2% → 32.2%
- Moody's−65%fewer sharesReduced9.1% → 3.2%
- Microsoft+25%more sharesIncreased16.8% → 20.5%
- Mastercard+46%more sharesIncreased6.3% → 9.3%
- Visa+68%more sharesIncreased3.7% → 6.8%
- TransDigm Group−3.7%fewer sharesReduced25.5% → 27.5%
The figure on the right: for positions added to or trimmed, the change in the number of shares (%); for new and sold ones, the points of the portfolio moved (pp). Below, the portfolio weight before → after. Traded weight: what it bought or sold, excluding price effects.
Top holdings
- Amazon.comAMZN32.2%
- TransDigm GroupTDG27.5%
- MicrosoftMSFT20.5%
- MastercardMA9.3%
- VisaV6.8%
- Moody'sMCO3.2%
- AlphabetGOOGL0.4%
- Hilton Worldwide HoldingsHLT0.1%
“Since”: first quarter of the current run, unbroken until today. In the details, prices are the quarter-end prices of the quarters in which it added shares, per the 13F. The manager may have bought at any price within each quarter; the SEC only publishes the value at quarter end.
Portfolio by sector
- ● Consumer Discretionary 32%
- ● Industrials 28%
- ● Information Technology 21%
- ● Financials 19%
How its portfolio changed (8 quarters)
Q2 2026: 8
Q2 2026: 100%
Q2 2026: 13.6%
Traded turnover: the weight it bought plus the weight it sold in the quarter, divided by two, excluding price moves. The plain “turnover” in the header does include that effect. With a free account: the full history and sectors over time.
Stakes above 5% (13D/13G)
Companies where this filer reported holding 5% or more of the shares. It is the figure from its latest filing on each one; history since December 2024.
How we classify it
Investment firm, per its Form ADV of Apr 24, 2026 (high confidence).
The data, as reported: ALTAROCK PARTNERS LP (CRD 161005): 7.B private funds: 2 hedge (gross assets $5.7 bn); 5.D assets by client type: pooled vehicles 100% (of $5.7 bn)
The type comes from a rule applied to that data. If it looks wrong, tell us.
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