A summary of operating results for the quarterly periods in the years ended December 31, 2017 and 2016, is set forth below (in millions, except per share data):

	Quarter Ended
	March 31 (1)		June 30 (2)		September 30 (3)		December 31 (1) (2) (3) (4) (5)
Year ended December 31, 2017
Net revenue	$	384.9	$	414.9	$	435.6	$	530.5
Gross profit		176.4		183.4		198.0		255.2
Operating income		37.6		33.5		49.9		93.7
Net income (loss) attributable to Bruker Corporation		21.6		23.4		37.0		(3.4	)
Net income (loss) per common share attributable to Bruker Corporation shareholders:
Basic	$	0.14	$	0.15	$	0.23	$	(0.02	)
Diluted	$	0.13	$	0.15	$	0.23	$	(0.02	)
Year ended December 31, 2016
Net revenue	$	375.4	$	371.7	$	393.9	$	470.3
Gross profit		166.8		170.1		185.2		220.4
Operating income		34.0		20.4		45.9		76.9
Net income attributable to Bruker Corporation		23.6		14.5		46.5		69.0
Net income per common share attributable to Bruker Corporation shareholders:
Basic	$	0.14	$	0.09	$	0.29	$	0.43
Diluted	$	0.14	$	0.09	$	0.29	$	0.43


(1)	The first and fourth quarter of 2017 includes impairment of assets of $0.3 million and $0.8 million, respectively, comprised of other long-lived assets.
(2)	The second and fourth quarter of 2016 includes impairment of assets of $0.7 million and $0.1 million, respectively, comprised of other long-lived assets.
(3)	The third quarter of 2017 includes bargain purchase gain of $1.1 million related to the Merlin Diagnostika GmbH acquisition and the fourth quarter of 2017 includes an adjustment to the bargain purchase gain of $0.5 million related to the same acquisition.
(4)	The fourth quarter of 2016 includes bargain purchase gain of $9.2 million related to the Oxford Instruments Superconducting Wire LLC., acquisition.
(5)	The fourth quarter of 2017 includes $68.9 million of incremental income tax provision related to the 2017 Tax Act.