POWER INTEGRATIONS INC

Ticker: POWI CUSIP: 739276103 Class: Common Stock

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP's Holding History (CIK: 0001164508)

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

Q3 2025

Shares 16,938 Value ($000) $681 Avg Close $47.82 Range $38.91 - $59.47

Q1 2023

Shares 3,403 Value ($000) $0 Avg Close $79.89 Range $68.31 - $88.42

Q2 2021

Shares 24,100 Value ($000) $1,978 Avg Close $76.63 Range $69.29 - $83.54

Q3 2020

Shares 4,200 Value ($000) $233 Avg Close $54.41 Range $47.61 - $60.12

Q2 2017

Shares 54,059 Value ($000) $3,941 Avg Close $30.45 Range $28.41 - $34.96

Q1 2017

Shares 276,439 Value ($000) $18,176 Avg Close $30.47 Range $28.17 - $33.28

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2025	16,938	$681	$47.82	$38.91 - $59.47
Q1 2023	3,403	$0	$79.89	$68.31 - $88.42
Q2 2021	24,100	$1,978	$76.63	$69.29 - $83.54
Q3 2020	4,200	$233	$54.41	$47.61 - $60.12
Q2 2017	54,059	$3,941	$30.45	$28.41 - $34.96
Q1 2017	276,439	$18,176	$30.47	$28.17 - $33.28