POWER INTEGRATIONS INC

Ticker: POWI CUSIP: 739276103 Class: Common Stock

FIRST INTERSTATE BANK's Holding History (CIK: 0001125727)

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

Q1 2019

Shares 216 Value ($000) $15 Avg Close $31.72 Range $26.00 - $35.37

Q4 2018

Shares 216 Value ($000) $13 Avg Close $27.46 Range $22.01 - $30.60

Q3 2018

Shares 216 Value ($000) $14 Avg Close $33.39 Range $28.42 - $36.17

Q2 2018

Shares 216 Value ($000) $16 Avg Close $33.57 Range $30.31 - $37.33

Q1 2018

Shares 216 Value ($000) $15 Avg Close $32.97 Range $27.96 - $36.94

Q4 2017

Shares 216 Value ($000) $16 Avg Close $35.18 Range $32.26 - $39.91

Q3 2017

Shares 216 Value ($000) $16 Avg Close $33.61 Range $30.70 - $38.09

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2019	216	$15	$31.72	$26.00 - $35.37
Q4 2018	216	$13	$27.46	$22.01 - $30.60
Q3 2018	216	$14	$33.39	$28.42 - $36.17
Q2 2018	216	$16	$33.57	$30.31 - $37.33
Q1 2018	216	$15	$32.97	$27.96 - $36.94
Q4 2017	216	$16	$35.18	$32.26 - $39.91
Q3 2017	216	$16	$33.61	$30.70 - $38.09