CAT ROCK CAPITAL MANAGEMENT LP 13F: Portfolio & Holdings
In its most recent SEC Form 13F-HR filing (as of Q1 2026), CAT ROCK CAPITAL MANAGEMENT LP (SEC CIK 0001654648) reported 14 positions with a combined market value of $0.6 billion. The Greenwich-based hedge fund has Communication Services as its largest sector at 30.4% of exposure.
Its largest holdings are Meta Platforms INC (META) at 17.6%, Microsoft (MSFT) at 14.3%, and Ares Management Corporation (ARES) at 10.0%.
The largest position increase was Ares Management Corporation (ARES) (+7.1% of portfolio weight). See the fund’s full Q1 2026 buys, sells, and portfolio changes →
Based on published SEC 13F filings, CAT ROCK CAPITAL MANAGEMENT's closest peer funds by portfolio overlap are Joho Capital LLC (47.8%), Gobi Capital LLC (46.0%), and Triple Frond Partners LLC (43.9%).
- 13F AUM
- $0.6B
- Equity Positions
- 14
- Top-10 Concentration
- 88.9%
- Largest Sector · 30.4%
- Communication Services
- Longest-Held Position · 35 qtrs
- TDG
- Median Holding Period
- 4 Qtrs
What are CAT ROCK CAPITAL MANAGEMENT’s largest 13F holdings as of Q1 2026?
Largest 13F positions disclosed by CAT ROCK CAPITAL MANAGEMENT, ranked by portfolio weight. Full multi-quarter history and the broader institutional holder base for each ticker linked per row.
| # | Issuer | Ticker | Sector | Weight | Position Value | Detail |
|---|---|---|---|---|---|---|
| 1 | META PLATFORMS INC | META | Communication Services | 17.6% | $113.6M | Position History All Holders |
| 2 | MICROSOFT | MSFT | Technology | 14.3% | $92.1M | Position History All Holders |
| 3 | ARES MANAGEMENT CORPORATION | ARES | Financial Services | 10.0% | $64.2M | Position History All Holders |
| 4 | TKO GROUP HOLDINGS INC | TKO | Communication Services | 9.6% | $61.8M | Position History All Holders |
| 5 | TRANSDIGM GROUP INC | TDG | Industrials | 8.3% | $53.4M | Position History All Holders |
| 6 | FIRST ADVANTAGE CORP NEW | FA | Industrials | 7.7% | $49.7M | Position History All Holders |
| 7 | JSC KASPI.KZ | KSPI | Technology | 7.3% | $46.7M | Position History All Holders |
| 8 | PDD HOLDINGS INC | PDD | Consumer Cyclical | 7.0% | $45.0M | Position History All Holders |
| 9 | STRIDE INC | LRN | Consumer Defensive | 3.6% | $23.1M | Position History All Holders |
| 10 | MSCI INC | MSCI | Financial Services | 3.5% | $22.6M | Position History All Holders |
View CAT ROCK CAPITAL MANAGEMENT's Q1 2026 portfolio changes and trading report →
Portfolio composition
Sectors, concentrations, and a tap-through treemap of every position in the fund's latest 13F.
Holding period analytics
Distribution of holding periods for all 61 stocks the fund has ever held (up to selected quarter):
Which Funds Hold a Similar Portfolio to CAT ROCK CAPITAL MANAGEMENT?
Ranked by percentage of the peer fund's 13F equity portfolio that overlaps with CAT ROCK CAPITAL MANAGEMENT's positions in Q1 2026.
| # | Fund | Shared Positions | Overlap % |
|---|---|---|---|
| 1 | Joho Capital LLC | 2 | 47.8% |
| 2 | Gobi Capital LLC | 3 | 46.0% |
| 3 | Triple Frond Partners LLC | 4 | 43.9% |
| 4 | Oriental Harbor Investment Master Fund | 3 | 43.7% |
| 5 | Altarock Partners LP | 2 | 42.3% |
| 6 | Newlands Management Operations LLC | 3 | 39.0% |
| 7 | Triata Capital Ltd | 1 | 38.6% |
| 8 | First Beijing Investment Ltd | 2 | 37.3% |
| 9 | Himalaya Capital Management LLC | 3 | 37.0% |
| 10 | BlueSpruce Investments, LP | 3 | 36.0% |
How Has CAT ROCK CAPITAL MANAGEMENT's AUM Changed Over Time?
Quarterly 13F-reported AUM for CAT ROCK CAPITAL MANAGEMENT, derived from aggregate reported position market values disclosed to the U.S. SEC.
| Quarter | 13F AUM (USD) | QoQ Change |
|---|---|---|
| Q2 2016 | $197M | — |
| Q3 2016 | $182M | -0.0B |
| Q4 2016 | $177M | -0.0B |
| Q1 2017 | $248M | +0.1B |
| Q2 2017 | $233M | -0.0B |
| Q3 2017 | $195M | -0.0B |
| Q4 2017 | $207M | +0.0B |
| Q1 2018 | $269M | +0.1B |
| Q2 2018 | $295M | +0.0B |
| Q3 2018 | $418M | +0.1B |
| Q4 2018 | $423M | +0.0B |
| Q1 2019 | $369M | -0.1B |
| Q2 2019 | $563M | +0.2B |
| Q3 2019 | $635M | +0.1B |
| Q4 2019 | $710M | +0.1B |
| Q1 2020 | $833M | +0.1B |
| Q2 2020 | $947M | +0.1B |
| Q3 2020 | $963M | +0.0B |
| Q4 2020 | $1.0B | +0.1B |
| Q1 2021 | $1.1B | +0.0B |
| Q2 2021 | $1.2B | +0.1B |
| Q3 2021 | $1.1B | -0.0B |
| Q4 2021 | $1.0B | -0.1B |
| Q1 2022 | $962M | -0.1B |
| Q2 2022 | $470M | -0.5B |
| Q3 2022 | $449M | -0.0B |
| Q4 2022 | $544M | +0.1B |
| Q1 2023 | $710M | +0.2B |
| Q2 2023 | $725M | +0.0B |
| Q3 2023 | $671M | -0.1B |
| Q4 2023 | $660M | -0.0B |
| Q1 2024 | $873M | +0.2B |
| Q2 2024 | $893M | +0.0B |
| Q3 2024 | $883M | -0.0B |
| Q4 2024 | $765M | -0.1B |
| Q1 2025 | $754M | -0.0B |
| Q2 2025 | $794M | +0.0B |
| Q3 2025 | $810M | +0.0B |
| Q4 2025 | $697M | -0.1B |
| Q1 2026 | $644M | -0.1B |
Methodology & FAQ
How We Track CAT ROCK CAPITAL MANAGEMENT Holdings
Our data is systematically aggregated directly from quarterly Form 13F-HR disclosures submitted to the U.S. Securities and Exchange Commission (SEC).
- Who Must File (Reporting Threshold): This dataset includes filings from U.S. institutional investment managers, hedge funds, mutual funds, university endowments, and family offices managing at least $100 million in Section 13(f) securities (including equities, options, convertibles, ETFs, and warrants).
- What is Included (Data Scope): By regulation, 13F filings include long positions in U.S. exchange-listed stocks, ETFs, shares of closed-end investment companies, and convertible debt, as defined in the SEC's official Section 13(f) securities list . For listed options (calls/puts) the reported value is based on the notional value.
- Portfolio Weight Explained (Metric Definition): “Portfolio Weight” shows how much of a fund's total reported 13F portfolio value (excluding listed options) is allocated to a specific position on the reporting date.
- How to Use This Data (Interpretation): Quarter-over-quarter changes in shares and portfolio weight reflect a combination of active trading and market price movements. These are descriptive metrics of fund allocation, not explicit buy or sell signals.
What does CAT ROCK CAPITAL MANAGEMENT's 13F filing disclose about their portfolio?
A Form 13F-HR filed by CAT ROCK CAPITAL MANAGEMENT with the U.S. SEC discloses all long positions in Section 13(f) securities — U.S.-listed equities, ETFs, closed-end funds, and listed put/call options — held at quarter-end with a market value of at least $200,000 or 10,000 or more shares. Pactolio aggregates these filings to surface the manager’s reported portfolio weights, share counts, and quarter-over-quarter portfolio changes in a structured format. The filing represents a point-in-time snapshot of disclosed long-side exposure, not a real-time or complete view of the fund’s total book.
How do you measure conviction in CAT ROCK CAPITAL MANAGEMENT's portfolio allocations?
Conviction is measured by portfolio weight — the percentage of CAT ROCK CAPITAL MANAGEMENT’s total reported 13F market value allocated to a given position — rather than by absolute share count or dollar value alone. A position representing a disproportionately large share of the fund’s disclosed book signals high-conviction allocation, regardless of whether it ranks among the fund’s largest absolute holdings.
What is excluded from CAT ROCK CAPITAL MANAGEMENT's 13F — short positions, swaps, and derivatives?
SEC Form 13F requires disclosure of long positions only. Specifically excluded are: short interest, total return swaps, credit default swaps, and all OTC derivatives — none of which appear in 13F filings regardless of position size. Listed put and call options must be disclosed but are excluded from portfolio weight calculations on this platform so that reported weights reflect direct equity exposure and remain comparable across filers. This means CAT ROCK CAPITAL MANAGEMENT’s 13F represents the reported long book, which may differ materially from its net economic exposure.
When is CAT ROCK CAPITAL MANAGEMENT's 13F data available, and how large is the reporting lag?
Investment managers must submit Form 13F within 45 calendar days of each quarter-end (the T+45 deadline). Pactolio ingests filings directly from SEC EDGAR as they are published — managers who file early appear in our system before the deadline, while late filers are captured on their actual filing date. The quarter label shown at the top of this page reflects the most recently processed 13F cycle for CAT ROCK CAPITAL MANAGEMENT. The inherent reporting lag means the data always reflects positions as of the prior quarter-end, not current holdings.
Who must file a Form 13F with the SEC, and does CAT ROCK CAPITAL MANAGEMENT qualify?
Under SEC Rule 13f-1, any investment manager — including hedge funds, family offices, registered investment advisers, pension funds, and university endowments — that exercises investment discretion over $100 million or more in Section 13(f) securities at any point during a calendar year must file Form 13F for that year. CAT ROCK CAPITAL MANAGEMENT meets this threshold, which is why its holdings are publicly disclosed and accessible on this platform. The $100 million threshold is evaluated on a rolling basis, meaning new filers can enter and existing filers can exit the disclosure regime as AUM crosses that boundary.