Altarock Partners LP — 13F Holdings

2026 Q3  ·  8 Positions

2026 Q3 Portfolio Activity

In 2026 Q3, ALTAROCK PARTNERS LP maintained a portfolio of 8 distinct positions. They heavily accumulated shares in MICROSOFT CORP, increasing the position by 13.1%. The fund also reduced its exposure to MOODYS CORP by 56.1%.
Position History hover any row below to update
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ALTAROCK PARTNERS LP Beverly, MA Hedge Fund AUM $4,213M
Fund Overview SEC EDGAR
PCA Score Concentration Risk
Risk ENB
To Excel To CSV
Total Positions
8
Quarter
2026 Q3
Top Holding
MSFT (32.1%)
Top 10 Concentration
100.0%
Turnover Rate
23.4%
Sector HHI
0.18
Items per page:
Showing 1-8 of 8
Stock History Sector / Type Port % Prev % Rank / Prev Conviction
Freshness
Change % Change Influence Shares Mkt Value Avg Cost Price Held 1st Owned Source Source Date Date Reported
MSFT
MICROSOFT CORP
Technology 32.15% 20.54% #1 2
Prev: #3
8.0
—
306,540 13.1%
P
S
2,641,022 $1,354,580,184 2021 Q2 13F Filing 2026-09-30 2026-11-13
AMZN
AMAZON.COM INC
Consumer Cyclical 28.53% 32.21% #2 1
Prev: #1
6.0
—
-905,000 -15.8%
P
S
4,824,972 $1,202,141,774 2022 Q1 13F Filing 2026-09-30 2026-11-13
TDG
TRANSDIGM GROUP...
Industrials 21.67% 27.51% #3 1
Prev: #2
5.5
—
-32,499 -3.7%
P
S
843,256 $912,908,946 2014 Q4 13F Filing 2026-09-30 2026-11-13
MA
MASTERCARD INC-...
Financial Services 9.21% 9.26% #4
Prev: #4
4.7
—
-60,481 -7.9%
P
S
704,026 $388,249,218 2014 Q4 13F Filing 2026-09-30 2026-11-13
V
VISA INC-CLASS ...
Financial Services 6.56% 6.77% #5
Prev: #5
3.6
—
-66,758 -8.0%
P
S
769,712 $276,580,613 2014 Q4 13F Filing 2026-09-30 2026-11-13
MCO
MOODYS CORP
Financial Services 1.43% 3.23% #6
Prev: #6
0.6
—
-169,655 -56.1%
P
S
132,969 $60,385,212 2014 Q4 13F Filing 2026-09-30 2026-11-13
GOOGL
ALPHABET INC-CL...
Communication Services 0.32% 0.35% #7
Prev: #7
0.6
—
-2,300 -5.5%
P
S
39,694 $13,657,912 2019 Q4 13F Filing 2026-09-30 2026-11-13
HLT
HILTON WORLDWID...
Consumer Cyclical 0.11% 0.12% #8
Prev: #8
1.0
—
no change no change
P
S
15,202 $4,836,060 2024 Q4 13F Filing 2026-09-30 2026-11-13
Showing 1-8 of 8 holdings

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