CAT ROCK CAPITAL MANAGEMENT LP 13F: Quarter-over-Quarter Portfolio Changes
CAT ROCK CAPITAL MANAGEMENT LP reported a disclosed portfolio value of approximately $431.0 million in its latest SEC Form 13F-HR filing for Q2 2026, down 33.0% quarter on quarter. Over the quarter, the fund bought more shares in 4 holdings, trimmed 2 holdings, and exited 7 positions.
CAT ROCK CAPITAL MANAGEMENT LP's top buy was Transdigm Group INC (TDG) . The fund bought 37.4% more shares, lifting the position's portfolio weight by 11.3 percentage points. Its top sell was Meta Platforms INC (META) . The fund exited the position completely after it had accounted for 17.6% of the previous portfolio.
Top BuysQ2 2026
The fund's top buys among existing positions in Q2 2026. Ranked by portfolio-weight impact, with the percentage of additional shares shown separately.
| Company | Ticker | Portfolio Weight Change | More Shares | History |
|---|---|---|---|---|
| TRANSDIGM GROUP INC | TDG | +11.3% | +37.4% | History → |
| MSCI INC | MSCI | +3.0% | +19.1% | History → |
| ARES MANAGEMENT CORPORATION | ARES | +7.2% | +12.9% | History → |
| TKO GROUP HOLDINGS INC | TKO | +6.2% | +10.7% | History → |
Top SellsQ2 2026
The fund's top sells among positions it retained in Q2 2026. Ranked by portfolio-weight impact. Full exits are listed separately.
| Company | Ticker | Portfolio Weight Change | Shares Sold | History |
|---|---|---|---|---|
| MICROSOFT CORP | MSFT | 3.0% | 19.4% | History → |
| TAIWAN SEMICONDUCTOR MANUFAC | TSM | 2.6% | 14.8% | History → |
Full ExitsQ2 2026
Positions present in the prior 13F-HR filing that no longer appear in Q2 2026.
| Company | Ticker | Last-Reported Portfolio Weight |
|---|---|---|
| META PLATFORMS INC | META | 17.6% |
| KASPI KZ JSC | KSPI | 7.3% |
| PDD HOLDINGS INC | PDD | 7.0% |
| STRIDE INC | LRN | 3.6% |
| ALPHABET INC | GOOG | 3.2% |
| DOCEBO INC | DCBO | 3.0% |
| DOCUSIGN INC | DOCU | 1.7% |
Net Portfolio Value ChangeQ2 2026
- $0.6BPrior quarter
- $0.4BCurrent quarter
- $-0.2BNet delta
- -33.0%% change
Methodology & FAQ
How CAT ROCK CAPITAL MANAGEMENT LP Quarterly Changes Are Computed
All deltas are sourced from sequential SEC Form 13F-HR filings for CAT ROCK CAPITAL MANAGEMENT LP: each row joins the most recent filing against the immediately preceding quarterly filing for the same fund. Share-count changes reflect reported trading activity, while portfolio weights can also move because of market price changes. Portfolio weights are normalized to exclude listed options for comparability. A complete description, including how confidential treatment filings are handled, is documented in the Methodology.
What stocks did CAT ROCK CAPITAL MANAGEMENT LP buy in Q2 2026?
In Q2 2026, CAT ROCK CAPITAL MANAGEMENT LP bought more shares of TRANSDIGM GROUP INC (TDG), MSCI INC (MSCI), ARES MANAGEMENT CORPORATION (ARES), TKO GROUP HOLDINGS INC (TKO).
What stocks did CAT ROCK CAPITAL MANAGEMENT LP sell in Q2 2026?
In Q2 2026, CAT ROCK CAPITAL MANAGEMENT LP fully sold 7 positions (META PLATFORMS INC (META), KASPI KZ JSC (KSPI), PDD HOLDINGS INC (PDD), STRIDE INC (LRN), ALPHABET INC (GOOG), DOCEBO INC (DCBO), DOCUSIGN INC (DOCU)); reduced holdings in MICROSOFT CORP (MSFT), TAIWAN SEMICONDUCTOR MANUFAC (TSM).
Which positions did CAT ROCK CAPITAL MANAGEMENT LP initiate in Q2 2026?
CAT ROCK CAPITAL MANAGEMENT LP established no new positions in Q2 2026.
Which existing positions saw the largest allocation increases for CAT ROCK CAPITAL MANAGEMENT LP in Q2 2026?
Of 4 existing positions with share-count increases in Q2 2026, the largest were: TRANSDIGM GROUP INC (TDG, +11.3% weight, +37.4% shares), MSCI INC (MSCI, +3.0% weight, +19.1% shares), ARES MANAGEMENT CORPORATION (ARES, +7.2% weight, +12.9% shares), TKO GROUP HOLDINGS INC (TKO, +6.2% weight, +10.7% shares).
Which positions did CAT ROCK CAPITAL MANAGEMENT LP fully exit in Q2 2026?
CAT ROCK CAPITAL MANAGEMENT LP fully exited 7 positions in Q2 2026: META PLATFORMS INC (META, last-reported weight 17.6%), KASPI KZ JSC (KSPI, last-reported weight 7.3%), PDD HOLDINGS INC (PDD, last-reported weight 7.0%), STRIDE INC (LRN, last-reported weight 3.6%), ALPHABET INC (GOOG, last-reported weight 3.2%), DOCEBO INC (DCBO, last-reported weight 3.0%), DOCUSIGN INC (DOCU, last-reported weight 1.7%).
Which existing positions saw the largest allocation reductions for CAT ROCK CAPITAL MANAGEMENT LP in Q2 2026?
Of 2 existing positions with share-count reductions in Q2 2026, the largest were: MICROSOFT CORP (MSFT, 3.0% weight, -19.4% shares), TAIWAN SEMICONDUCTOR MANUFAC (TSM, 2.6% weight, -14.8% shares).
Do quarter-over-quarter 13F allocation changes constitute explicit trading signals?
No. Quarter-over-quarter changes reflect a combination of active trading and market price movement. A weight increase can result from price appreciation alone, without the manager adding shares. Share-count delta is the cleaner indicator of explicit trading activity. All deltas on this page are sourced from sequential SEC Form 13F-HR filings.