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Altarock Partners portfolio

Concentrated managerInvestment firm

Portfolio 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.

Stock portfolio
$4.2 bn
Positions
8
Top 10: 100%
Turnover
12%
Copying its 13F, 5 years
8.5%/yr
SPY 11.8% · -3.2%price only, no dividends

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)

Positions

Q2 2026: 8

100
Q3 2024Q2 2026
Top 10 weight

Q2 2026: 100%

100%100%
Q3 2024Q2 2026
Traded turnover

Q2 2026: 13.6%

13.6%0
Q3 2024Q2 2026

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.

Similar managers by type and size

Same type of filer and a 13F portfolio value between a third and three times this one. It is not a comparison of what they hold.

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