POWER INTEGRATIONS INC

Ticker: POWI CUSIP: 739276103 Class: Common Stock

FRED ALGER MANAGEMENT, LLC's Holding History (CIK: 0000003520)

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

Q3 2014

Shares 205,846 Value ($000) $11,097 Avg Close $25.20 Range $22.98 - $28.86

Q2 2014

Shares 211,028 Value ($000) $12,143 Avg Close $24.97 Range $16.99 - $30.03

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2014	205,846	$11,097	$25.20	$22.98 - $28.86
Q2 2014	211,028	$12,143	$24.97	$16.99 - $30.03