WINDACRE PARTNERSHIP LLC: TRANSDIGM GROUP INC (TDG): Quarterly 13F Position History
As of Q1 2026, WINDACRE PARTNERSHIP LLC reported 509,600 shares of TRANSDIGM GROUP INC (TDG), worth $590.6M and representing 6.3% of its 13F equity book. Quarter-over-quarter share count change: 56,500 (-10.0%) . The position first appeared in Q1 2017 and has been disclosed across 37 13F-HR filings in Pactolio's tracked window.
- 509,600Shares Held (Latest Filing)
- $590.6MReported Market Value (Latest Filing)
- 6.3%Portfolio Weight (% of 13F Equity Book)
- 56,500Quarter-over-Quarter Share Change
- -$162.2MQuarter-over-Quarter Value Change
- 2,260,700Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 37 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 509,600 | 56,500 | -10.0% | $590.6M | 6.3% | $1159.0 |
| Q4 2025 | 566,100 | 46,400 | -7.6% | $752.8M | 8.1% | $1329.8 |
| Q3 2025 | 612,500 | 100,200 | -14.1% | $807.3M | 10.1% | $1318.0 |
| Q2 2025 | 712,700 | 9,300 | -1.3% | $1.1B | 14.8% | $1520.6 |
| Q1 2025 | 722,000 | 31,997 | -4.2% | $998.7M | 15.0% | $1383.3 |
| Q4 2024 | 753,997 | +25,997 | +3.6% | $955.5M | 14.0% | $1267.3 |
| Q3 2024 | 728,000 | +217,700 | +42.7% | $1.0B | 13.8% | $1427.1 |
| Q2 2024 | 510,300 | +12,300 | +2.5% | $652.0M | 8.6% | $1277.6 |
| Q1 2024 | 498,000 | 82,200 | -14.2% | $613.3M | 8.4% | $1231.6 |
| Q4 2023 | 580,200 | +16,900 | +3.0% | $586.9M | 8.9% | $1011.6 |
| Q3 2023 | 563,300 | +28,000 | +5.2% | $474.9M | 8.6% | $843.1 |
| Q2 2023 | 535,300 | +535,300 | — | $478.6M | 9.2% | $894.2 |
| Q1 2023 | 0 | 458,300 | -100.0% | $0 | 0.0% | — |
| Q4 2022 | 458,300 | 90,100 | -16.4% | $288.6M | 7.0% | $629.6 |
| Q3 2022 | 548,400 | +30,000 | +5.8% | $287.8M | 4.8% | $524.8 |
| Q2 2022 | 518,400 | 206,000 | -28.4% | $278.2M | 5.8% | $536.7 |
| Q1 2022 | 724,400 | 261,100 | -26.5% | $472.0M | 9.9% | $651.5 |
| Q4 2021 | 985,500 | +316,700 | +47.4% | $627.1M | 14.0% | $636.3 |
| Q3 2021 | 668,800 | 124,456 | -15.7% | $417.7M | 9.3% | $624.6 |
| Q2 2021 | 793,256 | 28,200 | -3.4% | $513.5M | 11.3% | $647.3 |
| Q1 2021 | 821,456 | 20,244 | -2.4% | $482.9M | 12.0% | $587.9 |
| Q4 2020 | 841,700 | 332,783 | -28.3% | $520.9M | 13.7% | $618.8 |
| Q3 2020 | 1,174,483 | 585,017 | -33.2% | $558.0M | 17.0% | $475.1 |
| Q2 2020 | 1,759,500 | 501,200 | -22.2% | $777.8M | 23.4% | $442.1 |
| Q1 2020 | 2,260,700 | +1,657,400 | +274.7% | $723.9M | 32.3% | $320.2 |
| Q4 2019 | 603,300 | 268,600 | -30.8% | $337.8M | 17.6% | $560.0 |
| Q3 2019 | 871,900 | 366,100 | -29.6% | $454.0M | 22.7% | $520.7 |
| Q2 2019 | 1,238,000 | +69,100 | +5.9% | $598.9M | 29.0% | $483.8 |
| Q1 2019 | 1,168,900 | 462,300 | -28.3% | $530.7M | 29.5% | $454.0 |
| Q4 2018 | 1,631,200 | +688,700 | +73.1% | $554.7M | 32.0% | $340.1 |
| Q3 2018 | 942,500 | +62,300 | +7.1% | $350.9M | 33.8% | $372.3 |
| Q2 2018 | 880,200 | +63,000 | +7.7% | $303.8M | 30.5% | $345.1 |
| Q1 2018 | 817,200 | 68,000 | -7.7% | $250.8M | 28.8% | $306.9 |
| Q4 2017 | 885,200 | +112,100 | +14.5% | $243.1M | 27.7% | $274.6 |
| Q3 2017 | 773,100 | +131,000 | +20.4% | $197.6M | 28.0% | $255.7 |
| Q2 2017 | 642,100 | +114,900 | +21.8% | $172.6M | 29.4% | $268.9 |
| Q1 2017 | 527,200 | — | — | $116.1M | 25.7% | $220.2 |
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 WINDACRE PARTNERSHIP LLC first disclose a TDG position in 13F-HR filings?
WINDACRE PARTNERSHIP LLC first reported TRANSDIGM GROUP INC (TDG) on its 13F-HR filing for the period ending 2017-03-31 (Q1 2017). The position has appeared on 37 reported quarters within Pactolio's tracked window.
What was WINDACRE PARTNERSHIP LLC's most recent quarter-over-quarter share-count change in TDG?
Between Q4 2025 and Q1 2026, WINDACRE PARTNERSHIP LLC reduced its TDG position by 56,500 shares (-10.0%), leaving 509,600 shares at a market value of $590.6M.
Does the implied price-per-share represent WINDACRE PARTNERSHIP LLC'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.