TRANSDIGM GROUP INC

Ticker: TDG CUSIP: 893641100 Class: COM

Atika Capital Management LLC's Holding History (CIK: 0001599731)

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

Q4 2015

Shares 9,100 Value ($000) $2,079 Avg Close $140.66 Range $131.38 - $149.06

Q3 2015

Shares 11,000 Value ($000) $2,336 Avg Close $143.01 Range $130.21 - $153.05

Q2 2015

Shares 15,300 Value ($000) $3,438 Avg Close $140.09 Range $132.07 - $145.10

Q1 2015

Shares 12,375 Value ($000) $2,707 Avg Close $131.65 Range $121.43 - $141.37

Q4 2014

Shares 14,160 Value ($000) $2,780 Avg Close $117.83 Range $104.12 - $125.64

Q3 2014

Shares 14,060 Value ($000) $2,592 Avg Close $111.57 Range $102.95 - $120.15

Q2 2014

Shares 14,000 Value ($000) $2,342 Avg Close $101.01 Range $93.79 - $108.05

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2015	9,100	$2,079	$140.66	$131.38 - $149.06
Q3 2015	11,000	$2,336	$143.01	$130.21 - $153.05
Q2 2015	15,300	$3,438	$140.09	$132.07 - $145.10
Q1 2015	12,375	$2,707	$131.65	$121.43 - $141.37
Q4 2014	14,160	$2,780	$117.83	$104.12 - $125.64
Q3 2014	14,060	$2,592	$111.57	$102.95 - $120.15
Q2 2014	14,000	$2,342	$101.01	$93.79 - $108.05