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ALTAROCK PARTNERS LP

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13F filer, CIK 1631014, WEST PALM BEACH, FL

ALTAROCK PARTNERS LP reported $5,100,067,772 across 8 holdings for the quarter ended 2025-12-31, in a 13F-HR filed 2026-02-13.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001104659-26-015359

Period
2025-12-31
Reported value
$5.1B
Holdings
8
Top 10 weight
100%
New
0
Sold out
1

Largest buys vs the previous quarter

None.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
MSFTreduced-486,910-$235M
MCOreduced-134,232-$68.6M
AMZNreduced-243,719-$56.3M
GOOGLreduced-175,000-$54.8M
MAreduced-42,250-$24.1M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Holdings, Q4 2025

Share positions as resolved from 13F-HR 0001104659-26-015359, largest first. % of portfolio is the value over $5,100,067,772, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
AMZNAMAZON COM INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 5,402,320 shares; 2024Q4: 5,278,320 shares; 2025Q1: 5,202,415 shares; 2025Q2: 6,275,906 shares; 2025Q3: 7,558,253 shares; 2025Q4: 7,314,534 shares 7,314,534$1.69B33.1%-243,719Timeline
TDGTRANSDIGM GROUP INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,048,264 shares; 2024Q4: 1,000,604 shares; 2025Q1: 979,950 shares; 2025Q2: 979,950 shares; 2025Q3: 976,392 shares; 2025Q4: 969,400 shares 969,400$1.29B25.28%-6,992Timeline
MSFTMICROSOFT CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,934,816 shares; 2024Q4: 1,891,641 shares; 2025Q1: 2,578,649 shares; 2025Q2: 2,578,649 shares; 2025Q3: 2,569,267 shares; 2025Q4: 2,082,357 shares 2,082,357$1.01B19.75%-486,910Timeline
MCOMOODYS CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,066,619 shares; 2024Q4: 950,905 shares; 2025Q1: 950,905 shares; 2025Q2: 952,254 shares; 2025Q3: 948,735 shares; 2025Q4: 814,503 shares 814,503$416M8.16%-134,232Timeline
MAMASTERCARD INCORPORATEDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 620,033 shares; 2024Q4: 586,254 shares; 2025Q1: 586,254 shares; 2025Q2: 586,254 shares; 2025Q3: 584,086 shares; 2025Q4: 541,836 shares 541,836$309M6.07%-42,250Timeline
VVISA INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,118,383 shares; 2024Q4: 874,912 shares; 2025Q1: 850,412 shares; 2025Q2: 535,412 shares; 2025Q3: 533,522 shares; 2025Q4: 516,677 shares 516,677$181M3.55%-16,845Timeline
HLTHILTON WORLDWIDE HLDGS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: 91,328 shares; 2025Q1: 273,957 shares; 2025Q2: 544,596 shares; 2025Q3: 542,613 shares; 2025Q4: 542,613 shares 542,613$156M3.06%0Timeline
GOOGLALPHABET INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 3,333,905 shares; 2024Q4: 3,480,801 shares; 2025Q1: 3,454,367 shares; 2025Q2: 1,045,429 shares; 2025Q3: 344,391 shares; 2025Q4: 169,391 shares 169,391$53M1.04%-175,000Timeline

Sold out in Q4 2025

Positions in the previous quarter's report that this quarter's report no longer lists.

SecurityShares beforeValue beforeType
FICOFAIR ISAAC CORP667$998Kshares

How Q4 2025 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0001104659-26-015359 base2026-02-13acceptance time not in the bulk data set