ENTEGRIS INC

Ticker: ENTG CUSIP: 29362U104 Class: EQTY

IRIDIAN ASSET MANAGEMENT LLC/CT's Holding History (CIK: 0001033427)

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

Q4 2020

Shares 611,584 Value ($000) $58,773 Avg Close $85.63 Range $72.68 - $98.15

Q3 2020

Shares 1,099,511 Value ($000) $81,738 Avg Close $65.62 Range $54.94 - $73.61

Q2 2020

Shares 1,445,516 Value ($000) $85,358 Avg Close $54.31 Range $39.60 - $63.49

Q1 2020

Shares 2,151,572 Value ($000) $96,326 Avg Close $50.63 Range $37.23 - $57.68

Q4 2019

Shares 2,708,224 Value ($000) $135,655 Avg Close $47.00 Range $43.45 - $50.25

Q3 2019

Shares 3,261,725 Value ($000) $153,497 Avg Close $41.06 Range $34.02 - $47.16

Q2 2019

Shares 3,133,246 Value ($000) $116,933 Avg Close $36.83 Range $32.80 - $40.83

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2020	611,584	$58,773	$85.63	$72.68 - $98.15
Q3 2020	1,099,511	$81,738	$65.62	$54.94 - $73.61
Q2 2020	1,445,516	$85,358	$54.31	$39.60 - $63.49
Q1 2020	2,151,572	$96,326	$50.63	$37.23 - $57.68
Q4 2019	2,708,224	$135,655	$47.00	$43.45 - $50.25
Q3 2019	3,261,725	$153,497	$41.06	$34.02 - $47.16
Q2 2019	3,133,246	$116,933	$36.83	$32.80 - $40.83