Quarterly Results (unaudited)

The following table sets forth our consolidated unaudited financial data for the last eight quarters ended December 31, 2018. We believe that we have included all adjustments, consisting only of normal recurring adjustments necessary for a fair statement of our selected quarterly data. The calculation of basic and diluted per share amounts for each quarter is based on the weighted-average shares outstanding for that period; consequently, the sum of the quarters may not necessarily be equal to the full year basic and diluted net income per share.



	For the Quarter Ended
	Dec 31, 2018 (c)		Sep 30, 2018		Jun 30, 2018		Mar 31, 2018		Dec 31, 2017 (c)			Sep 30, 2017		Jun 30, 2017 (a)		Mar 31, 2017
	(In thousands, except per share data)
Net sales	$	1,081,271	$	1,144,192	$	1,065,684	$	1,025,319	$	1,150,478		$	1,148,884	$	1,008,385	$	899,284
Gross profit	182,370		200,707		169,717		157,771		224,341			223,888		176,616		136,234
Operating income (b)	75,381		92,703		53,941		36,119		109,018			105,479		172,659		18,384
Income tax (benefit) expense	28,812		14,326		10,631		2,481		(13,613		)	21,263		33,466		(1,325		)
Net income (loss)	28,894		57,292		33,184		10,195		101,185			60,458		120,030		(13,968		)
Net income (loss) attributable to Amkor	28,295		56,662		32,591		9,544		100,059			59,264		119,013		(14,786		)
Net income (loss) attributable to Amkor per common share:
Basic	$	0.12	$	0.24	$	0.14	$	0.04	$	0.42		$	0.25	$	0.50	$	(0.06	)
Diluted	$	0.12	$	0.24	$	0.14	$	0.04	$	0.42		$	0.25	$	0.50	$	(0.06	)


(a)	In May 2017, we completed the purchase of Nanium. Nanium's financial results have been included in our Consolidated Financial Statements from the date of acquisition.


(b)	In May 2017, we sold the land and buildings comprising our K1 factory for $142.4 million which resulted in a pre-tax gain of $108.1 million.

(c)

In the fourth quarter of 2017, net income includes an estimated net tax benefit of $41.6 million primarily due to the reversal of a valuation allowance on certain U.S. deferred tax assets as a result of the enactment of the Tax Act. In the fourth quarter of 2018, we recorded a $22.3 million income tax expense to complete the accounting for the impact of the Tax Act, reducing our estimated net tax benefit of $41.6 million from 2017.