TRANSDIGM GROUP INC

Ticker: TDG CUSIP: 893641100 Class: COM

WESTFIELD CAPITAL MANAGEMENT CO LP's Holding History (CIK: 0001177719)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 16,193 Value ($000) $21,534 Avg Close $1310.75 Range $1235.69 - $1367.65

Q3 2025

Shares 217,897 Value ($000) $287,192 Avg Close $1364.80 Range $1243.55 - $1519.36

Q2 2025

Shares 290,013 Value ($000) $441,005 Avg Close $1314.14 Range $1107.45 - $1430.11

Q1 2025

Shares 316,162 Value ($000) $437,343 Avg Close $1247.54 Range $1160.54 - $1316.81

Q4 2024

Shares 362,218 Value ($000) $459,031 Avg Close $1229.53 Range $1150.91 - $1333.02

Q3 2024

Shares 372,061 Value ($000) $530,980 Avg Close $1152.37 Range $1042.46 - $1269.97

Q2 2024

Shares 363,406 Value ($000) $464,291 Avg Close $1136.24 Range $1050.85 - $1213.74

Q1 2024

Shares 315,374 Value ($000) $388,415 Avg Close $997.72 Range $861.47 - $1097.97

Q4 2023

Shares 320,175 Value ($000) $323,889 Avg Close $802.78 Range $685.93 - $902.61

Q3 2023

Shares 323,938 Value ($000) $273,122 Avg Close $749.90 Range $712.93 - $803.50

Q2 2023

Shares 363,795 Value ($000) $325,294 Avg Close $676.05 Range $611.15 - $768.93

Q1 2023

Shares 371,149 Value ($000) $273,555 Avg Close $610.68 Range $533.03 - $659.90

Q4 2022

Shares 379,165 Value ($000) $238,741 Avg Close $503.62 Range $427.08 - $554.24

Q3 2022

Shares 379,608 Value ($000) $199,226 Avg Close $502.76 Range $427.88 - $565.18

Q2 2022

Shares 405,360 Value ($000) $217,545 Avg Close $490.58 Range $415.64 - $563.58

Q1 2022

Shares 397,054 Value ($000) $258,697 Avg Close $534.00 Range $477.93 - $569.10

Q4 2021

Shares 361,727 Value ($000) $230,160 Avg Close $520.38 Range $459.39 - $570.21

Q3 2021

Shares 348,755 Value ($000) $217,822 Avg Close $519.19 Range $482.92 - $550.47

Q2 2021

Shares 359,660 Value ($000) $232,804 Avg Close $521.39 Range $479.18 - $571.85

Q1 2021

Shares 376,213 Value ($000) $221,183 Avg Close $489.77 Range $430.01 - $520.29

Q4 2020

Shares 390,103 Value ($000) $241,415 Avg Close $457.04 Range $377.14 - $517.44

Q3 2020

Shares 376,080 Value ($000) $178,683 Avg Close $390.77 Range $336.62 - $439.84

Q2 2020

Shares 316,575 Value ($000) $139,942 Avg Close $314.55 Range $216.10 - $446.79

Q1 2020

Shares 359,386 Value ($000) $115,072 Avg Close $452.74 Range $166.28 - $559.78

Q4 2019

Shares 434,524 Value ($000) $243,333 Avg Close $431.37 Range $390.88 - $473.78

Q3 2019

Shares 226,591 Value ($000) $117,979 Avg Close $392.06 Range $338.00 - $426.07

Q2 2019

Shares 223,960 Value ($000) $108,352 Avg Close $347.24 Range $325.07 - $371.97

Q1 2019

Shares 299,044 Value ($000) $135,763 Avg Close $301.26 Range $241.12 - $338.24

Q4 2018

Shares 302,321 Value ($000) $102,807 Avg Close $254.69 Range $228.13 - $278.59

Q3 2018

Shares 272,737 Value ($000) $101,540 Avg Close $267.24 Range $250.90 - $280.31

Q2 2018

Shares 245,649 Value ($000) $84,783 Avg Close $243.87 Range $221.45 - $258.04

Q1 2018

Shares 249,849 Value ($000) $76,689 Avg Close $218.67 Range $196.90 - $238.53

Q4 2017

Shares 239,765 Value ($000) $65,844 Avg Close $201.62 Range $189.22 - $211.95

Q3 2017

Shares 314,473 Value ($000) $80,395 Avg Close $189.94 Range $179.71 - $201.53

Q2 2017

Shares 343,619 Value ($000) $92,389 Avg Close $173.41 Range $148.53 - $187.86

Q1 2017

Shares 325,439 Value ($000) $71,649 Avg Close $163.01 Range $139.17 - $177.33

Q4 2016

Shares 306,976 Value ($000) $76,425 Avg Close $176.01 Range $160.64 - $189.46

Q3 2016

Shares 332,409 Value ($000) $96,106 Avg Close $175.41 Range $160.79 - $183.97

Q2 2016

Shares 335,874 Value ($000) $88,567 Avg Close $152.60 Range $135.64 - $167.49

Q1 2016

Shares 449,767 Value ($000) $99,102 Avg Close $136.47 Range $112.97 - $145.25

Q4 2015

Shares 461,859 Value ($000) $105,512 Avg Close $140.66 Range $131.38 - $149.06

Q3 2015

Shares 445,173 Value ($000) $94,559 Avg Close $143.01 Range $130.21 - $153.05

Q2 2015

Shares 306,158 Value ($000) $68,785 Avg Close $140.09 Range $132.07 - $145.10

Q1 2015

Shares 325,313 Value ($000) $71,152 Avg Close $131.65 Range $121.43 - $141.37

Q4 2014

Shares 351,103 Value ($000) $68,939 Avg Close $117.83 Range $104.12 - $125.64

Q3 2014

Shares 373,735 Value ($000) $68,891 Avg Close $111.57 Range $102.95 - $120.15

Q2 2014

Shares 383,730 Value ($000) $64,183 Avg Close $101.01 Range $93.79 - $108.05

Q1 2014

Shares 552,572 Value ($000) $102,336 Avg Close $95.29 Range $86.57 - $102.25

Q4 2013

Shares 577,427 Value ($000) $92,977 Avg Close $81.23 Range $74.58 - $88.80

Q3 2013

Shares 598,527 Value ($000) $83,016 Avg Close $76.29 Range $70.62 - $81.77

Q2 2013

Shares 608,392 Value ($000) $95,377 Avg Close $70.58 Range $67.23 - $77.43

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	16,193	$21,534	$1310.75	$1235.69 - $1367.65
Q3 2025	217,897	$287,192	$1364.80	$1243.55 - $1519.36
Q2 2025	290,013	$441,005	$1314.14	$1107.45 - $1430.11
Q1 2025	316,162	$437,343	$1247.54	$1160.54 - $1316.81
Q4 2024	362,218	$459,031	$1229.53	$1150.91 - $1333.02
Q3 2024	372,061	$530,980	$1152.37	$1042.46 - $1269.97
Q2 2024	363,406	$464,291	$1136.24	$1050.85 - $1213.74
Q1 2024	315,374	$388,415	$997.72	$861.47 - $1097.97
Q4 2023	320,175	$323,889	$802.78	$685.93 - $902.61
Q3 2023	323,938	$273,122	$749.90	$712.93 - $803.50
Q2 2023	363,795	$325,294	$676.05	$611.15 - $768.93
Q1 2023	371,149	$273,555	$610.68	$533.03 - $659.90
Q4 2022	379,165	$238,741	$503.62	$427.08 - $554.24
Q3 2022	379,608	$199,226	$502.76	$427.88 - $565.18
Q2 2022	405,360	$217,545	$490.58	$415.64 - $563.58
Q1 2022	397,054	$258,697	$534.00	$477.93 - $569.10
Q4 2021	361,727	$230,160	$520.38	$459.39 - $570.21
Q3 2021	348,755	$217,822	$519.19	$482.92 - $550.47
Q2 2021	359,660	$232,804	$521.39	$479.18 - $571.85
Q1 2021	376,213	$221,183	$489.77	$430.01 - $520.29
Q4 2020	390,103	$241,415	$457.04	$377.14 - $517.44
Q3 2020	376,080	$178,683	$390.77	$336.62 - $439.84
Q2 2020	316,575	$139,942	$314.55	$216.10 - $446.79
Q1 2020	359,386	$115,072	$452.74	$166.28 - $559.78
Q4 2019	434,524	$243,333	$431.37	$390.88 - $473.78
Q3 2019	226,591	$117,979	$392.06	$338.00 - $426.07
Q2 2019	223,960	$108,352	$347.24	$325.07 - $371.97
Q1 2019	299,044	$135,763	$301.26	$241.12 - $338.24
Q4 2018	302,321	$102,807	$254.69	$228.13 - $278.59
Q3 2018	272,737	$101,540	$267.24	$250.90 - $280.31
Q2 2018	245,649	$84,783	$243.87	$221.45 - $258.04
Q1 2018	249,849	$76,689	$218.67	$196.90 - $238.53
Q4 2017	239,765	$65,844	$201.62	$189.22 - $211.95
Q3 2017	314,473	$80,395	$189.94	$179.71 - $201.53
Q2 2017	343,619	$92,389	$173.41	$148.53 - $187.86
Q1 2017	325,439	$71,649	$163.01	$139.17 - $177.33
Q4 2016	306,976	$76,425	$176.01	$160.64 - $189.46
Q3 2016	332,409	$96,106	$175.41	$160.79 - $183.97
Q2 2016	335,874	$88,567	$152.60	$135.64 - $167.49
Q1 2016	449,767	$99,102	$136.47	$112.97 - $145.25
Q4 2015	461,859	$105,512	$140.66	$131.38 - $149.06
Q3 2015	445,173	$94,559	$143.01	$130.21 - $153.05
Q2 2015	306,158	$68,785	$140.09	$132.07 - $145.10
Q1 2015	325,313	$71,152	$131.65	$121.43 - $141.37
Q4 2014	351,103	$68,939	$117.83	$104.12 - $125.64
Q3 2014	373,735	$68,891	$111.57	$102.95 - $120.15
Q2 2014	383,730	$64,183	$101.01	$93.79 - $108.05
Q1 2014	552,572	$102,336	$95.29	$86.57 - $102.25
Q4 2013	577,427	$92,977	$81.23	$74.58 - $88.80
Q3 2013	598,527	$83,016	$76.29	$70.62 - $81.77
Q2 2013	608,392	$95,377	$70.58	$67.23 - $77.43