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AltaRock Partners

Q1 2025 13F · by Mark Massey, founder

As of
Mar 31, 2025
Filed
May 14, 2025
US stock
$5.0B · prev $4.9B
Positions
9 · prev 10
Options notional
$0
Documents
1· no amendments

Picture100.0% US stock

Full picture · of what this 13F reports is US stock

  • US stock listed on a US exchange 100.0%
  • Foreign stock not listed in the US 0.0%
  • Notes debt, at principal 0.0%
  • Puts at notional value 0.0%
  • Calls at notional value 0.0%

Moves7 since the prior filing

The book

Very concentrated · behaves like 6 equal-sized positions

  1. Very concentrated
  2. Concentrated
  3. Focused
  4. Diversified

Low turnover · 4.6% a year, about 21.6 years per position

  1. Low
  2. Moderate
  3. High

Top 5 positions86% of US stock

  1. TDG TransDigm Group Incorporated trimmed+1.61 pp trimmed+1.6127.3%
  2. AMZN Amazon.Com Inc trimmed−3.52 pp trimmed−3.5219.9%
  3. MSFT Microsoft Corp added+3.33 pp added+3.3319.5%
  4. GOOGL Alphabet Inc. Class A trimmed−2.59 pp trimmed−2.5910.7%
  5. MCO Moody's Corporation held held8.9%

Positions9 in this filing · 1 exited

TDGTransDigm Group Incorporated27.26%979,950$1.4Btrimmed−2%+1.61 pp42 q
AMZNAmazon.Com Inc19.90%5,202,415$990Mtrimmed−1%−3.52 pp13 q
MSFTMicrosoft Corp19.46%2,578,649$968Madded+36%+3.33 pp16 q
GOOGLAlphabet Inc. Class A10.74%3,454,367$534Mtrimmed−1%−2.59 pp22 q
MCOMoody's Corporation8.90%950,905$443Mheld—42 q
MAMastercard Incorporated6.46%586,254$321Mheld—42 q
VVISA Inc.5.99%850,412$298Mtrimmed−3%+0.40 pp42 q
HLTHilton Worldwide Holdings Inc.1.25%273,957$62Madded×3.0+0.79 pp2 q
FICOFair Isaac Corporation0.02%670$1Mheld—4 q
CHTRCharter Comm Inc Del CL A New—−6,025—exited−0.04 pp—

Source

Form
13F-HR
Reading
0 defects · 0 unresolved
Options
none in this filing
Notes
none in this filing
SEC cross-check
SEC data set not published yet