TransDigm Group Incorporated
MX ˙ BMV ˙ US8936411003
SecurityMX:TDG / TransDigm Group Incorporated
InstitutionCastleark Management Llc
Latest Disclosed Ownership770 shares
Latest Disclosed Value $ 892,399
Castleark Management Llc ownership in TDG / TransDigm Group Incorporated

On May 15, 2026 - Castleark Management Llc filed a 13F-HR form disclosing ownership of 770 shares of TransDigm Group Incorporated (MX:TDG) valued at $892,399 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 770 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)
2026-05-15 2026-03-31 13F TRANSDIGM GROUP COM 893641100 770 0 0.00 892 -12.81 0.0295
2026-02-12 2025-12-31 13F TRANSDIGM GROUP COM 893641100 770 0 0.00 1,024 0.89 0.0301
2025-11-17 2025-09-30 13F TRANSDIGM GROUP COM 893641100 770 0 0.00 1,015 -13.33 0.0285
2025-08-18 2025-06-30 13F TRANSDIGM GROUP COM 893641100 770 0 0.00 1,171 9.86 0.0352
2025-05-15 2025-03-31 13F TRANSDIGM GROUP COM 893641100 770 0 0.00 1,065 9.23 0.0369
2025-02-18 2024-12-31 13F TRANSDIGM GROUP COM 893641100 770 0 0.00 976 -11.20 0.0340
2024-11-15 2024-09-30 13F TRANSDIGM GROUP COM 893641100 770 0 0.00 1,099 11.70 0.0448
2024-08-14 2024-06-30 13F TRANSDIGM GROUP COM 893641100 770 0 0.00 984 3.69 0.0402
2024-05-16 2024-03-31 13F TRANSDIGM GROUP COM 893641100 770 0 0.00 948 21.85 0.0395
2024-02-15 2023-12-31 13F TRANSDIGM GROUP COM 893641100 770 0 0.00 779 19.88 0.0345
2023-11-15 2023-09-30 13F TRANSDIGM GROUP COM 893641100 770 0 0.00 649 -5.67 0.0331
2023-08-16 2023-06-30 13F TRANSDIGM GROUP COM 893641100 770 0 0.00 689 21.34 0.0312
2023-05-16 2023-03-31 13F TRANSDIGM GROUP COM 893641100 770 0 0.00 568 17.15 0.0279
2023-02-10 2022-12-31 13F TRANSDIGM GROUP COM 893641100 770 0 0.00 485 19.80 0.0253
2022-11-15 2022-09-30 13F TRANSDIGM GROUP COM 893641100 770 0 0.00 404 -2.18 0.0225
2022-08-16 2022-06-30 13F TRANSDIGM GROUP COM 893641100 770 0 0.00 413 -17.73 0.0221
2022-05-16 2022-03-31 13F TRANSDIGM GROUP COM 893641100 770 0 0.00 502 2.45 0.0217
2022-02-16 2021-12-31 13F TRANSDIGM GROUP COM 893641100 770 0 0.00 490 1.87 0.0180
2021-11-12 2021-09-30 13F TRANSDIGM GROUP COM 893641100 770 0 0.00 481 -3.41 0.0184
2021-08-17 2021-06-30 13F TRANSDIGM GROUP COM 893641100 770 0 0.00 498 9.93 0.0167
2021-05-14 2021-03-31 13F TRANSDIGM GROUP COM 893641100 770 0 0.00 453 -5.03 0.0163
2021-02-17 2020-12-31 13F TRANSDIGM GROUP COM 893641100 770 -100 -11.49 477 15.50 0.0179
2020-11-16 2020-09-30 13F TRANSDIGM GROUP COM 893641100 870 0 0.00 413 7.27 0.0162
2020-08-14 2020-06-30 13F TRANSDIGM GROUP COM 893641100 870 0 0.00 385 37.99 0.0167
2020-05-13 2020-03-31 13F TRANSDIGM GROUP COM 893641100 870 0 0.00 279 -42.71 0.0165
2020-02-14 2019-12-31 13F TRANSDIGM GROUP COM 893641100 870 0 0.00 487 7.51 0.0195
2019-11-15 2019-09-30 13F TRANSDIGM GROUP COM 893641100 870 0 0.00 453 7.60 0.0185
2019-08-13 2019-06-30 13F TRANSDIGM GROUP COM 893641100 870 0 0.00 421 6.58 0.0162
2019-05-14 2019-03-31 13F TRANSDIGM GROUP COM 893641100 870 0 0.00 395 33.45 0.0149
2019-02-12 2018-12-31 13F TRANSDIGM GROUP COM 893641100 870 0 0.00 296 -8.64 0.0126
2018-11-14 2018-09-30 13F TRANSDIGM GROUP COM 893641100 870 0 0.00 324 8.00 0.0093
2018-08-15 2018-06-30 13F TRANSDIGM GROUP COM 893641100 870 0 0.00 300 12.36 0.0092
2018-05-14 2018-03-31 13F TRANSDIGM GROUP COM 893641100 870 0 0.00 267 11.72 0.0085
2018-02-15 2017-12-31 13F TRANSDIGM GROUP COM 893641100 870 0 0.00 239 7.66 0.0072
2017-11-15 2017-09-30 13F TRANSDIGM GROUP COM 893641100 870 0 0.00 222 -5.13 0.0070
2017-08-15 2017-06-30 13F TRANSDIGM GROUP COM 893641100 870 0 0.00 234 21.88 0.0076
2017-05-15 2017-03-31 13F TRANSDIGM GROUP COM 893641100 870 -45,151 -98.11 192 -98.32 0.0060
2017-02-15 2016-12-31 13F TRANSDIGM GROUP COM 893641100 46,021 -113,939 -71.23 11,457 -75.23 0.3654
2016-11-15 2016-09-30 13F TRANSDIGM GROUP COM 893641100 159,960 -25,777 -13.88 46,248 -5.57 1.3988
2016-08-10 2016-06-30 13F TRANSDIGM GROUP COM 893641100 185,737 6,490 3.62 48,977 24.01 1.5622
2016-05-17 2016-03-31 13F TRANSDIGM GROUP COM 893641100 179,247 160,097 836.02 39,495 802.74 1.2334
2016-02-17 2015-12-31 13F TRANSDIGM GROUP COM 893641100 19,150 18,280 2,101.15 4,375 2,264.86 0.1315
2015-11-17 2015-09-30 13F TRANSDIGM GROUP COM 893641100 870 0 0.00 185 -5.13 0.0060
2015-08-17 2015-06-30 13F TRANSDIGM GROUP COM 893641100 870 0 0.00 195 2.63 0.0052
2015-05-15 2015-03-31 13F TRANSDIGM GROUP COM 893641100 870 0 0.00 190 11.11 0.0046
2015-02-10 2014-12-31 13F TRANSDIGM GROUP COM 893641100 870 -2,375 -73.19 171 -71.55 0.0044
2014-11-17 2014-09-30 13F TRANSDIGM GROUP COM 893641100 3,245 0 0.00 601 10.68 0.0171
2014-08-15 2014-06-30 13F TRANSDIGM GROUP COM 893641100 3,245 0 0.00 543 -9.65 0.0150
2014-05-20 2014-03-31 13F TRANSDIGM GROUP COM 893641100 3,245 0 0.00 601 14.91 0.0171
2014-02-20 2013-12-31 13F TRANSDIGM GROUP COM 893641100 3,245 2,375 272.99 523 226.88 0.0152
2014-11-21 2013-09-30 13F/A-1 TRANSDIGM GROUP COM 893641100 870 -475 -35.32 160 -24.17 0.0045
2013-11-20 2013-09-30 13F TRANSDIGM GROUP COM 893641100 1,345 187
2013-09-26 2013-06-30 13F TRANSDIGM GROUP COM 893641100 1,345 1,345 211 0.0070
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.