ALTAROCK PARTNERS LPtracked
Open in PORT →Compare →Tear sheet →← all managersCIK 1631014
Reported long US book (13F) · Δ vs 2025-Q4 · methodology
Implied return what this book implies methodology →
As filed = each book applied at quarter-end (what it did) · As copyable = applied at the 45-day filing deadline (what a follower could have earned).
Computing…
Exposures · what it owns, by sector & size (2026-Q1)
By sector
By market cap
By industry group GICS — finer than sector
| Industry group | Weight | Names |
|---|---|---|
| Specialty Retail | 38.20% | 1 |
| Aerospace & Defense | 25.54% | 1 |
| Commercial Services & Supplies | 19.10% | 3 |
| Software | 16.75% | 1 |
| Software & IT Services | 0.30% | 1 |
| Hotels, Restaurants & Leisure | 0.11% | 1 |
Top holdings
| # | Ticker | Name | Sector | Weight |
|---|---|---|---|---|
| 1 | AMZN | AMAZON COM INC | Consumer Discretionary | 38.20% |
| 2 | TDG | TransDigm Group INC | Industrials | 25.54% |
| 3 | MSFT | MICROSOFT CORP | Information Technology | 16.75% |
| 4 | MCO | MOODYS CORP /DE/ | Financials | 9.11% |
| 5 | MA | Mastercard Inc | Financials | 6.33% |
| 6 | V | VISA INC. | Financials | 3.65% |
| 7 | GOOGL | Alphabet Inc. | Communication Services | 0.30% |
| 8 | HLT | Hilton Worldwide Holdings Inc. | Consumer Discretionary | 0.11% |
8/8 classified; unclassified names are still shown.
Sector allocation over time · how the sector mix & top names shifted each quarter
Sector allocation over 46 reported quarters, 2014-Q4 to 2026-Q1, 20 bands (top holdings within each sector). Latest quarter 2026-Q1: AMZN 38.2%, TDG 25.5%, MSFT 16.8%, MCO 9.1%, MA 6.3%. Use the arrow keys to read a quarter.
Sector is classified on each name's CURRENT fundamentals, not point-in-time — apparent sector drift can reflect the market re-rating a holding, not a manager trade. 13F is a lagged quarterly snapshot of long positions in US-listed securities only — foreign companies held via a US listing or ADR ARE included, but shares listed only on non-US exchanges (plus shorts, options and cash) are not. Latest quarter: 100.0% of the book is classified (unclassified names are still shown).
Style box · size × value-growth placement (2026-Q1), classified on today's fundamentals (not point-in-time) — load into PORT to overlay your own book
Classified: 100.0% of book weight (8/8 names).
Contribution holdings-based, any period
Attribution lands once this book has priced history across the window. Try a longer period.
Holdings· 8 positions (2026-Q1) · largest first · Δ vs 2025-Q4
| # | Security | Shares | Value | Weight | Δ QoQ |
|---|---|---|---|---|---|
| 1 | AMZNAMAZON COM INC | 7,567,946 | $1.6B | 38.2% | ADD 3% |
| 2 | TDGTRANSDIGM GROUP INC | 909,168 | $1.1B | 25.5% | TRIM −6% |
| 3 | MSFTMICROSOFT CORP | 1,867,537 | $691M | 16.8% | TRIM −10% |
| 4 | MCOMOODYS CORP | 862,036 | $376M | 9.1% | ADD 6% |
| 5 | MAMASTERCARD INCORPORATED | 522,836 | $261M | 6.3% | TRIM −4% |
| 6 | VVISA INC | 498,677 | $151M | 3.7% | TRIM −3% |
| 7 | GOOGLALPHABET INC | 43,391 | $12M | 0.3% | TRIM −74% |
| 8 | HLTHILTON WORLDWIDE HLDGS INC | 15,341 | $5M | 0.1% | TRIM −97% |
Position trends· top 8 holdings · shares held over 6 quarters
| Security | 2024-Q4 | 2025-Q1 | 2025-Q2 | 2025-Q3 | 2025-Q4 | 2026-Q1 | Latest value |
|---|---|---|---|---|---|---|---|
| AMZNAMAZON COM INC | 5.3M | 5.2M | 6.3M | 7.6M | 7.3M | 7.6M | $1.6B |
| TDGTRANSDIGM GROUP INC | 1.0M | 980K | 980K | 976K | 969K | 909K | $1.1B |
| MSFTMICROSOFT CORP | 1.9M | 2.6M | 2.6M | 2.6M | 2.1M | 1.9M | $691M |
| MCOMOODYS CORP | 951K | 951K | 952K | 949K | 815K | 862K | $376M |
| MAMASTERCARD INCORPORATED | 586K | 586K | 586K | 584K | 542K | 523K | $261M |
| VVISA INC | 875K | 850K | 535K | 534K | 517K | 499K | $151M |
| GOOGLALPHABET INC | 3.5M | 3.5M | 1.0M | 344K | 169K | 43K | $12M |
| HLTHILTON WORLDWIDE HLDGS INC | 91K | 274K | 545K | 543K | 543K | 15K | $5M |
Green = added, red = trimmed, grey = held; a dash is a quarter with no 13F on file — a gap, not an exit.
Related· where to look next
Where this firm's principals came from, and what its alumni went on to found.
joins filed 13F data only — no style, strategy or performance similarity is claimed · 13F 2026-Q1
Also hold AMZN — other Section 13(f) filers reporting a long position in this book's largest tickered holding for 2026-Q1. Lagged quarterly filings (up to 45 days after quarter-end); “% of shares out” is omitted where the reported share count can't carry it.
Filers outside the free window show locked, not hidden.