Institutional Manager · CIK 0001631014
ALTAROCK PARTNERS LP
West Palm Beach, FL · File #028-16669
Latest AUM
$5.10B
Positions
8
Top-10 Concentration
100.0%
Filings
10
Portfolio Value Over Time
2024-03
2024-06
2024-09
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| REDUCE | MICROSOFT CORP | MSFT | -486,910 | -$235.5M | -$88.2M |
| REDUCE | MOODYS CORP | MCO | -134,232 | -$68.6M | +$32.6M |
| REDUCE | AMAZON.COM INC | AMZN | -243,719 | -$56.3M | +$85.0M |
| REDUCE | ALPHABET INC-CL A | GOOG | -175,000 | -$54.8M | +$24.1M |
| REDUCE | MASTERCARD INC-CLASS A | MA | -42,250 | -$24.1M | +$1.2M |
| REDUCE | TRANSDIGM GROUP INC | TDG | -6,992 | -$9.3M | +$11.6M |
| REDUCE | VISA INC-CLASS A SHRS | V | -16,845 | -$5.9M | +$5.0M |
| EXITED | FAIR ISAAC INC | 303250104 | -667 | -$998,186 | $0 |
| REDUCE | HILTON WORLDWIDE | HLT | 0 | $0 | +$15.1M |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 20258 pos · $5.10B
- 13F HOLDINGS REPORTQ/E Sep 20259 pos · $5.47B
- 13F HOLDINGS REPORTQ/E Jun 20259 pos · $5.48B
- 13F HOLDINGS REPORTQ/E Mar 20259 pos · $4.97B
- 13F HOLDINGS REPORTQ/E Dec 202410 pos · $4.94B
- 13F HOLDINGS REPORTQ/E Sep 20249 pos · $5.08B
- 13F HOLDINGS REPORTQ/E Jun 20249 pos · $4.86B
- 13F HOLDINGS REPORT (Amended)Q/E Mar 20248 pos · $4.65B
- 13F HOLDINGS REPORTQ/E Mar 20248 pos · $4.65B
- 13F HOLDINGS REPORTQ/E Dec 20238 pos · $3.99B
Top 8 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | AMAZON.COM INC | AMZN | 7,314,534 | $1.69B | 33.10% |
| 2 | TRANSDIGM GROUP INC | TDG | 969,400 | $1.29B | 25.28% |
| 3 | MICROSOFT CORP | MSFT | 2,082,357 | $1.01B | 19.75% |
| 4 | MOODYS CORP | MCO | 814,503 | $416.1M | 8.16% |
| 5 | MASTERCARD INC-CLASS A | MA | 541,836 | $309.3M | 6.07% |
| 6 | VISA INC-CLASS A SHRS | V | 516,677 | $181.2M | 3.55% |
| 7 | HILTON WORLDWIDE | HLT | 542,613 | $155.9M | 3.06% |
| 8 | ALPHABET INC-CL A | GOOG | 169,391 | $53.0M | 1.04% |