NRG ENERGY INC

Ticker: NRG CUSIP: 629377508 Class: COM NEW

FRONTIER CAPITAL MANAGEMENT CO LLC's Holding History (CIK: 0000351173)

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

Q3 2015

Shares 1,098 Value ($000) $16 Avg Close $15.78 Range $11.49 - $18.37

Q2 2015

Shares 1,098 Value ($000) $25 Avg Close $19.73 Range $18.06 - $21.19

Q1 2015

Shares 1,098 Value ($000) $28 Avg Close $19.83 Range $17.92 - $21.82

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2015	1,098	$16	$15.78	$11.49 - $18.37
Q2 2015	1,098	$25	$19.73	$18.06 - $21.19
Q1 2015	1,098	$28	$19.83	$17.92 - $21.82