TransDigm Group Incorporated
MX ˙ BMV ˙ US8936411003
SecurityMX:TDG / TransDigm Group Incorporated
InstitutionStockbridge Partners LLC
Latest Disclosed Ownership434,281 shares
Latest Disclosed Value $ 503,314,308
Stockbridge Partners LLC reports 0.00% increase in ownership of TDG / TransDigm Group Incorporated

On May 14, 2026 - Stockbridge Partners LLC filed a 13F-HR form disclosing ownership of 434,281 shares of TransDigm Group Incorporated (MX:TDG) valued at $503,314,308 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 434,280 shares of TransDigm Group Incorporated. This represents a change in shares of 0.00% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F TRANSDIGM GROUP COM 893641100 434,281 1 0.00 503,314 -12.85 12.1605
2026-02-13 2025-12-31 13F TRANSDIGM GROUP COM 893641100 434,280 -90,953 -17.32 577,527 -16.57 12.7120
2025-11-14 2025-09-30 13F TRANSDIGM GROUP COM 893641100 525,233 -7,318 -1.37 692,268 -14.52 13.3851
2025-08-14 2025-06-30 13F TRANSDIGM GROUP COM 893641100 532,551 -45,700 -7.90 809,818 1.24 15.8324
2025-05-15 2025-03-31 13F TRANSDIGM GROUP COM 893641100 578,251 -90,034 -13.47 799,889 -5.55 17.7040
2025-02-14 2024-12-31 13F TRANSDIGM GROUP COM 893641100 668,285 -38,053 -5.39 846,904 -15.98 17.9714
2024-11-14 2024-09-30 13F TRANSDIGM GROUP COM 893641100 706,338 0 0.00 1,008,036 11.70 20.2395
2024-08-14 2024-06-30 13F TRANSDIGM GROUP COM 893641100 706,338 -63,710 -8.27 902,424 -4.85 18.6580
2024-05-15 2024-03-31 13F TRANSDIGM GROUP COM 893641100 770,048 -253,890 -24.80 948,391 -8.44 19.5386
2024-02-14 2023-12-31 13F TRANSDIGM GROUP COMMON 893641100 1,023,938 -147,981 -12.63 1,035,816 4.83 22.1372
2023-11-14 2023-09-30 13F TRANSDIGM GROUP COM 893641100 1,171,919 -24,022 -2.01 988,080 -7.60 21.9720
2023-08-14 2023-06-30 13F TRANSDIGM GROUP COMMON 893641100 1,195,941 0 0.00 1,069,375 21.32 21.8174
2023-05-15 2023-03-31 13F TRANSDIGM GROUP COM 893641100 1,195,941 -406,407 -25.36 881,468 -12.63 20.4276
2023-02-14 2022-12-31 13F TRANSDIGM GROUP COM 893641100 1,602,348 0 0.00 1,008,918 19.97 27.0845
2022-11-14 2022-09-30 13F TRANSDIGM GROUP COM 893641100 1,602,348 0 0.00 840,944 -2.21 23.8192
2022-08-15 2022-06-30 13F TRANSDIGM GROUP COM 893641100 1,602,348 47,851 3.08 859,932 -15.10 22.5069
2022-05-13 2022-03-31 13F TRANSDIGM GROUP COM 893641100 1,554,497 0 0.00 1,012,817 2.40 21.8560
2022-02-14 2021-12-31 13F TRANSDIGM GROUP COM 893641100 1,554,497 0 0.00 989,095 1.87 19.9664
2021-11-15 2021-09-30 13F TRANSDIGM GROUP COM 893641100 1,554,497 0 0.00 970,892 -3.51 20.0060
2021-08-16 2021-06-30 13F TRANSDIGM GROUP COM 893641100 1,554,497 0 0.00 1,006,210 10.10 21.4109
2021-05-17 2021-03-31 13F TRANSDIGM GROUP COM 893641100 1,554,497 0 0.00 913,920 -5.00 22.2555
2021-02-16 2020-12-31 13F TRANSDIGM GROUP COM 893641100 1,554,497 0 0.00 962,000 30.25 22.6395
2020-11-16 2020-09-30 13F TRANSDIGM GROUP COM 893641100 1,554,497 133,310 9.38 738,573 17.56 20.3354
2020-08-14 2020-06-30 13F TRANSDIGM GROUP COM 893641100 1,421,187 259,484 22.34 628,236 68.90 19.7107
2020-05-15 2020-03-31 13F TRANSDIGM GROUP COMMON 893641100 1,161,703 9,053 0.79 371,966 -42.37 14.7485
2020-02-14 2019-12-31 13F TRANSDIGM GROUP COM 893641100 1,152,650 0 0.00 645,484 7.55 23.4164
2019-11-14 2019-09-30 13F TRANSDIGM GROUP COM 893641100 1,152,650 -283,248 -19.73 600,150 -13.61 23.8228
2019-08-14 2019-06-30 13F TRANSDIGM GROUP COM 893641100 1,435,898 0 0.00 694,687 6.57 26.8208
2019-05-15 2019-03-31 13F TRANSDIGM GROUP COM 893641100 1,435,898 -366,940 -20.35 651,883 6.33 23.9983
2019-02-14 2018-12-31 13F TRANSDIGM GROUP COM 893641100 1,802,838 0 0.00 613,073 -8.66 27.7044
2018-11-13 2018-09-30 13F TRANSDIGM GROUP COM 893641100 1,802,838 0 0.00 671,197 7.87 26.6187
2018-08-13 2018-06-30 13F TRANSDIGM GROUP COM 893641100 1,802,838 0 0.00 622,232 12.45 25.9402
2018-05-14 2018-03-31 13F TRANSDIGM GROUP COM 893641100 1,802,838 0 0.00 553,363 11.77 23.9236
2018-02-13 2017-12-31 13F TRANSDIGM GROUP COM 893641100 1,802,838 0 0.00 495,095 7.42 23.2616
2017-11-14 2017-09-30 13F TRANSDIGM GROUP COM 893641100 1,802,838 0 0.00 460,896 -4.92 23.2039
2017-08-11 2017-06-30 13F TRANSDIGM GROUP COM 893641100 1,802,838 0 0.00 484,729 22.12 22.1977
2017-05-12 2017-03-31 13F TRANSDIGM GROUP COM 893641100 1,802,838 104,967 6.18 396,913 -6.10 18.7140
2017-02-15 2016-12-31 13F TRANSDIGM GROUP COM 893641100 1,697,871 174,673 11.47 422,702 -4.02 20.5522
2016-11-14 2016-09-30 13F TRANSDIGM GROUP COM 893641100 1,523,198 0 0.00 440,387 9.64 21.1736
2016-08-15 2016-06-30 13F TRANSDIGM GROUP COM 893641100 1,523,198 0 0.00 401,652 19.67 21.0070
2016-05-16 2016-03-31 13F TRANSDIGM GROUP COM 893641100 1,523,198 188,162 14.09 335,621 10.04 17.8390
2016-02-16 2015-12-31 13F TRANSDIGM GROUP COMMON 893641100 1,335,036 0 0.00 304,989 7.55 16.8709
2015-11-16 2015-09-30 13F TRANSDIGM GROUP COMMON 893641100 1,335,036 0 0.00 283,575 -5.46 16.0737
2015-08-14 2015-06-30 13F TRANSDIGM GROUP COMMON 893641100 1,335,036 0 0.00 299,943 2.72 16.0738
2015-05-15 2015-03-31 13F TRANSDIGM GROUP COMMON 893641100 1,335,036 0 0.00 291,999 11.39 15.3684
2015-02-17 2014-12-31 13F TRANSDIGM GROUP COMMON 893641100 1,335,036 0 0.00 262,134 6.52 13.8912
2014-11-14 2014-09-30 13F TRANSDIGM GROUP COMMON 893641100 1,335,036 0 0.00 246,087 10.21 13.6524
2014-08-14 2014-06-30 13F TRANSDIGM GROUP COMMON 893641100 1,335,036 289,803 27.73 223,298 15.35 12.8815
2014-05-15 2014-03-31 13F TRANSDIGM GROUP COMMON 893641100 1,045,233 0 0.00 193,577 15.02 13.2399
2014-02-14 2013-12-31 13F TRANSDIGM GROUP COMMON 893641100 1,045,233 0 0.00 168,303 16.09 12.0047
2013-11-14 2013-09-30 13F TRANSDIGM GROUP COMMON 893641100 1,045,233 0 0.00 144,974 -11.53 12.2861
2013-08-14 2013-06-30 13F TRANSDIGM GROUP COMMON 893641100 1,045,233 1,045,233 163,861 14.0675
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.