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Changes in Capital Structure (Tables)

3 Months Ended

Mar. 31, 2019

Equity [Abstract]

Changes in NRG's common shares issued and outstanding

The following table reflects the changes in NRG's common stock issued and outstanding:

	Issued			Treasury			Outstanding
Balance as of December 31, 2018	420,288,886			(136,638,847	)		283,650,039
Shares issued under LTIPs	1,497,175			—			1,497,175
Shares repurchased	—			(17,608,957	)		(17,608,957	)
Balance as of March 31, 2019	421,786,061			(154,247,804	)		267,538,257

Shares Repurchased

The following repurchases have been made during the three months ended March 31, 2019 and through May 2, 2019:

	Total number of shares purchased			Amounts paid for shares purchased (in millions)
Board Authorized Share Repurchases
2018 program:
Repurchases made during January-February to complete the 2018 program	6,153,415			$	250
2019 program:
Shares repurchased under February 28, 2019 Accelerated Share Repurchase Agreement	9,086,903			400
March repurchases	2,368,639			99
Total Share Repurchases during the three months ended March 31, 2019	17,608,957			$	749
Additional shares delivered upon ASR settlement in April	351,768			—
April repurchases	39,140			1
Total Share Repurchases during the period ended May 2, 2019	17,999,865			$	750

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