13F filing recap · Q1 2026

What did AltaRock Partners buy in Q1 2026?

Reported stock-position changes between this filing and the previous one.

Stock value

$4.13B

Positions

Estimated turnover

9.4%

Turnover is a proxy: verified trade-origin share changes valued at period-end and divided by average reported stock value. SEC holdings reports do not disclose execution dates or prices. Corporate actions and unreconciled activity are excluded.

Quarter in review

AltaRock Partners added slightly to Amazon and Moody’s, while trimming Transdigm, Mastercard, and Visa. It also reduced Microsoft, and substantially cut Alphabet and Hilton Worldwide.

Increased positions

AMZNAmazon.com Inc$1.58Breported value+253.4K shares+3.5%MCOMoody’s Corporation$376.06Mreported value+47.5K shares+5.8%

Reduced positions

TDGTransdigm Group Incorporated$1.05Breported value-60.2K shares-6.2%MSFTMicrosoft Corporation$691.31Mreported value-214.8K shares-10.3%MAMastercard Inc$261.24Mreported value-19.0K shares-3.5%VVisa Inc.$150.72Mreported value-18.0K shares