CAT ROCK CAPITAL MANAGEMENT LP: TRANSDIGM GROUP INC (TDG): Quarterly 13F Position History
As of Q1 2026, CAT ROCK CAPITAL MANAGEMENT LP reported 46,084 shares of TRANSDIGM GROUP INC (TDG), worth $53.4M and representing 8.3% of its 13F equity book. Quarter-over-quarter share count change: + 16,805 (+57.4%) . The position first appeared in Q2 2016 and has been disclosed across 40 13F-HR filings in Pactolio's tracked window.
- 46,084Shares Held (Latest Filing)
- $53.4MReported Market Value (Latest Filing)
- 8.3%Portfolio Weight (% of 13F Equity Book)
- +16,805Quarter-over-Quarter Share Change
- +$14.5MQuarter-over-Quarter Value Change
- 493,578Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 40 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 46,084 | +16,805 | +57.4% | $53.4M | 8.3% | $1159.0 |
| Q4 2025 | 29,279 | +6,600 | +29.1% | $38.9M | 5.6% | $1329.8 |
| Q3 2025 | 22,679 | +11,943 | +111.2% | $29.9M | 3.7% | $1318.0 |
| Q2 2025 | 10,736 | +5,100 | +90.5% | $16.3M | 2.1% | $1520.6 |
| Q1 2025 | 5,636 | +5,636 | — | $7.8M | 1.0% | $1383.3 |
| Q4 2024 | 0 | 0 | — | $0 | 0.0% | — |
| Q3 2024 | 0 | 0 | — | $0 | 0.0% | — |
| Q2 2024 | 0 | 0 | — | $0 | 0.0% | — |
| Q1 2024 | 0 | 0 | — | $0 | 0.0% | — |
| Q4 2023 | 0 | 4,438 | -100.0% | $0 | 0.0% | — |
| Q3 2023 | 4,438 | 5,700 | -56.2% | $3.7M | 0.6% | $843.1 |
| Q2 2023 | 10,138 | 14,000 | -58.0% | $9.1M | 1.2% | $894.2 |
| Q1 2023 | 24,138 | 25,385 | -51.3% | $17.8M | 2.5% | $737.0 |
| Q4 2022 | 49,523 | 13,400 | -21.3% | $31.2M | 5.7% | $629.6 |
| Q3 2022 | 62,923 | 18,400 | -22.6% | $33.0M | 7.4% | $524.8 |
| Q2 2022 | 81,323 | 35,000 | -30.1% | $43.6M | 9.3% | $536.7 |
| Q1 2022 | 116,323 | +2,296 | +2.0% | $75.8M | 7.9% | $651.5 |
| Q4 2021 | 114,027 | 23,000 | -16.8% | $72.6M | 7.0% | $636.3 |
| Q3 2021 | 137,027 | 46,000 | -25.1% | $85.6M | 7.5% | $624.6 |
| Q2 2021 | 183,027 | 169,279 | -48.0% | $118.5M | 10.0% | $647.3 |
| Q1 2021 | 352,306 | 27,096 | -7.1% | $207.1M | 19.3% | $587.9 |
| Q4 2020 | 379,402 | 82,253 | -17.8% | $234.8M | 22.5% | $618.9 |
| Q3 2020 | 461,655 | 20,000 | -4.2% | $219.3M | 22.8% | $475.1 |
| Q2 2020 | 481,655 | +24,280 | +5.3% | $212.9M | 22.5% | $442.1 |
| Q1 2020 | 457,375 | +193,476 | +73.3% | $146.4M | 17.6% | $320.2 |
| Q4 2019 | 263,899 | +580 | +0.2% | $147.8M | 20.8% | $560.0 |
| Q3 2019 | 263,319 | 68,500 | -20.6% | $137.1M | 21.6% | $520.7 |
| Q2 2019 | 331,819 | +20,889 | +6.7% | $160.5M | 28.5% | $483.8 |
| Q1 2019 | 310,930 | 110,800 | -26.3% | $141.2M | 38.3% | $454.0 |
| Q4 2018 | 421,730 | +105,706 | +33.4% | $143.4M | 33.9% | $340.1 |
| Q3 2018 | 316,024 | +4,849 | +1.6% | $117.7M | 28.1% | $372.3 |
| Q2 2018 | 311,175 | +22,030 | +7.6% | $107.4M | 36.5% | $345.1 |
| Q1 2018 | 289,145 | +51,308 | +21.6% | $88.8M | 33.1% | $306.9 |
| Q4 2017 | 237,837 | 65,300 | -21.5% | $65.3M | 31.6% | $274.6 |
| Q3 2017 | 303,137 | +367 | +0.1% | $77.5M | 39.6% | $255.7 |
| Q2 2017 | 302,770 | 190,808 | -38.7% | $81.4M | 35.0% | $268.9 |
| Q1 2017 | 493,578 | +141,366 | +40.1% | $108.7M | 43.9% | $220.2 |
| Q4 2016 | 352,212 | +120,722 | +52.1% | $87.7M | 49.4% | $249.0 |
| Q3 2016 | 231,490 | 46,324 | -16.7% | $66.9M | 36.7% | $289.1 |
| Q2 2016 | 277,814 | — | — | $73.3M | 37.2% | $263.7 |
Methodology & FAQ
How This Position History Is Sourced
Each row is one SEC Form 13F-HR filing disclosing this position. Share count, market value, and reported quarter are taken verbatim from the filing; portfolio weight is recomputed against the same filing's total reported equity book. Implied price-per-share is market value divided by shares — a quarter-end mark, not the manager's cost basis. See the full methodology document for the normalization rules.
When did CAT ROCK CAPITAL MANAGEMENT LP first disclose a TDG position in 13F-HR filings?
CAT ROCK CAPITAL MANAGEMENT LP first reported TRANSDIGM GROUP INC (TDG) on its 13F-HR filing for the period ending 2016-06-30 (Q2 2016). The position has appeared on 40 reported quarters within Pactolio's tracked window.
What was CAT ROCK CAPITAL MANAGEMENT LP's most recent quarter-over-quarter share-count change in TDG?
Between Q4 2025 and Q1 2026, CAT ROCK CAPITAL MANAGEMENT LP added 16,805 shares of TDG (+57.4%), bringing the total reported position to 46,084 shares at a market value of $53.4M.
Does the implied price-per-share represent CAT ROCK CAPITAL MANAGEMENT LP's cost basis in TDG?
No. The implied price-per-share column is the 13F-HR reported market value divided by reported share count on the filing date (end of quarter). It is a quarter-end mark, not a cost basis or transaction price. Use it as a sanity check on the value column, not as an indicator of the manager's entry or exit price.