Plexus (PLXS) 10-Q 2016 Q1 Quarterly report

Exhibit 99.1

PLEXUS CORP.

NON-GAAP SUPPLEMENTAL INFORMATION

(in thousands, except per share data)

(unaudited)

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

	Three Months Ended				Twelve Months Ended				Three Months Ended
	January 2, 2016				October 3, 2015				January 3, 2015
Operating income	$	21,524			$	115,436			$	28,783
Restructuring charges	1,507				1,691				1,691
Adjusted operating income	$		23,031		$		117,127		$		30,474
	x		4		x		1		x		4
Annualized operating income	$		92,124				117,127		$		121,896
Tax rate	x		12	%	x		11	%	x		10	%
Tax impact			11,055				12,884				12,190
Operating income (tax effected)	$		81,069		$		104,243		$		109,706
Average invested capital	$	753,078			$	745,611			$	759,676
ROIC	10.8			%	14.0			%	14.4			%
Weighted average cost of capital ("WACC")	11.0			%	11.0			%	11.0			%
Economic return	(0.2			)%	3.0			%	3.4			%

	January 2,			October 3,			July 4,			April 4,			January 3,			September 27,
	2016			2015			2015			2015			2015			2014
Equity	$	850,794		$	842,272		$	835,063		$	808,468		$	792,298		$	781,133
Plus:
Debt—current	2,864			3,513			4,281			4,774			4,793			4,368
Debt—non-current	259,289			259,257			259,284			260,025			260,990			262,046
Less:
Cash and cash equivalents	(354,728		)	(357,106		)	(354,830		)	(356,296		)	(239,685		)	(346,591		)
	$	758,219		$	747,936		$	743,798		$	716,971		$	818,396		$	700,956

During the first quarter of fiscal 2016 average invested capital (January 2, 2016 and October 3, 2015) was $753,078. First quarter fiscal 2015 average invested capital (January 3, 2015 and September 27, 2014) was $759,676.