Plexus (PLXS) 10-Q 2017 Q1 Quarterly report

Exhibit 99.1

PLEXUS CORP.

NON-GAAP SUPPLEMENTAL INFORMATION

(in thousands)

(unaudited)

Return on Invested Capital ("ROIC") and Economic Return Calculations

	Three Months Ended				Twelve Months Ended				Three Months Ended
	December 31, 2016				October 1, 2016				January 2, 2016
Operating income, as reported	$	33,903			$	99,439			$	21,524
Typhoon-related losses	—				2,871				—
Accelerated stock-based compensation expense	—				5,210				—
Restructuring and other charges	—				7,034				1,507
Adjusted operating income	$		33,903		$		114,554		$		23,031
	x		4						x		4
Annualized adjusted operating income	$		135,612		$		114,554		$		92,124
Tax rate	x		8	%	x		11	%	x		12	%
Tax impact			10,849				12,601				11,055
Adjusted operating income (tax effected)	$		124,763		$		101,953		$		81,069
Average invested capital	$	720,197			$	739,986			$	753,078
ROIC	17.3			%	13.8			%	10.8			%
Weighted average cost of capital ("WACC")	10.5			%	11.0			%	11.0			%
Economic return	6.8			%	2.8			%	(0.2			)%

	Dec 31,			Oct 1,			Jul 2,			Apr 2,			Jan 2,			Oct 3,
Average Invested Capital	2016			2016			2016			2016			2016			2015
Equity	$	927,542		$	916,797		$	895,175		$	871,111		$	850,794		$	842,272
Plus:
Debt—current	78,879			78,507			78,279			2,300			2,864			3,513
Debt—long-term	184,136			184,002			184,479			259,565			259,289			259,257
Less:
Cash and cash equivalents	(496,505		)	(432,964		)	(433,679		)	(409,796		)	(354,728		)	(357,106		)
Average invested capital	$	694,052		$	746,342		$	724,254		$	723,180		$	758,219		$	747,936

During the first quarter of fiscal 2017 average invested capital (December 31, 2016 and October 1, 2016) was $720,197. First quarter fiscal 2016 average invested capital (January 2, 2016 and October 3, 2015) was $753,078.