ALTAROCK PARTNERS LP — 13F Holdings & Portfolio
CIK 1631014 · latest 13F-HR filed 2026-08-17
ALTAROCK PARTNERS LP manages $4.24B in 13F-reported U.S. long-equity assets across 8 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are AMZN (32.21%), TDG (27.51%), MSFT (20.54%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 0 new positions, exited 0, added to 6, and trimmed 2.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
SUITE 410
WEST PALM BEACH, FL 33401
$4.24B
Long-equity book
8
Distinct positions
2026-06-30
Filed 2026-08-17
+0 / −0 / ↑6 / ↓2
vs 2026-03-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- MICROSOFT CORP$179.5M +26.0%
- VISA INC-CLASS A SHRS$136.3M +90.4%
- MASTERCARD INC-CLASS A$131.4M +50.3%
- TRANSDIGM GROUP INC$112.9M +10.7%
- ALPHABET INC-CL A$2.5M +20.3%
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | AMAZON.COM INC | AMZN | 023135106 | $1.37B | 32.21% | 5,729,972 | SH |
| 2 | TRANSDIGM GROUP INC | TDG | 893641100 | $1.17B | 27.51% | 875,755 | SH |
| 3 | MICROSOFT CORP | MSFT | 594918104 | $870.8M | 20.54% | 2,334,482 | SH |
| 4 | MASTERCARD INC-CLASS A | MA | 57636Q104 | $392.7M | 9.26% | 764,507 | SH |
| 5 | VISA INC-CLASS A SHRS | V | 92826C839 | $287.0M | 6.77% | 836,470 | SH |
| 6 | MOODYS CORP | MCO | 615369105 | $137.1M | 3.23% | 302,624 | SH |
| 7 | ALPHABET INC-CL A | GOOGL | 02079K305 | $15.0M | 0.35% | 41,994 | SH |
| 8 | HILTON WORLDWIDE | HLT | 43300A203 | $5.0M | 0.12% | 15,202 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-06-30 | 2026-08-17 | $4.24B | 8 | 0001104659-26-097527 |
| 2026-03-31 | 2026-05-15 | $4.13B | 8 | 0001104659-26-062170 |
| 2025-12-31 | 2026-02-13 | $5.10B | 8 | 0001104659-26-015359 |
| 2025-09-30 | 2025-11-14 | $5.47B | 9 | 0001104659-25-112002 |