SEGMENT INFORMATION

The Company’s three reportable segments are Research Models and Services (RMS), Discovery and Safety Assessment (DSA), and Manufacturing Support (Manufacturing).

The following table presents revenue and other financial information by reportable segment:



	Three Months Ended				Nine Months Ended
	September 30, 2017		September 24, 2016		September 30, 2017		September 24, 2016
	(in thousands)
RMS
Revenue	$	122,020	$	120,928	$	373,183	$	369,325
Operating income	30,726		31,224		102,016		103,055
Depreciation and amortization	5,272		5,245		15,309		15,613
Capital expenditures	6,762		2,532		13,769		5,966
DSA
Revenue	$	246,946	$	215,817	$	726,796	$	594,859
Operating income	46,616		31,303		136,966		94,514
Depreciation and amortization	20,333		20,671		58,667		51,228
Capital expenditures	10,127		4,509		25,552		13,860
Manufacturing
Revenue	$	95,266	$	88,975	$	279,145	$	250,459
Operating income	31,923		26,711		87,565		73,447
Depreciation and amortization	5,572		6,181		17,321		18,682
Capital expenditures	2,879		1,862		7,111		8,247

For the three months ended September 30, 2017 and September 24, 2016, reconciliations of segment operating income, depreciation and amortization, and capital expenditures to the respective consolidated amounts are as follows:



	Operating Income						Depreciation and Amortization				Capital Expenditures
	September 30, 2017			September 24, 2016			September 30, 2017		September 24, 2016		September 30, 2017		September 24, 2016
	(in thousands)
Total reportable segments	$	109,265		$	89,238		$	31,177	$	32,097	$	19,768	$	8,903
Unallocated corporate	(35,281		)	(30,443		)	2,288		2,011		2,243		665
Total consolidated	$	73,984		$	58,795		$	33,465	$	34,108	$	22,011	$	9,568

For the nine months ended September 30, 2017 and September 24, 2016, reconciliations of segment operating income, depreciation and amortization, and capital expenditures to the respective consolidated amounts are as follows:



	Operating Income						Depreciation and Amortization				Capital Expenditures
	September 30, 2017			September 24, 2016			September 30, 2017		September 24, 2016		September 30, 2017		September 24, 2016
	(in thousands)
Total reportable segments	$	326,547		$	271,016		$	91,297	$	85,523	$	46,432	$	28,073
Unallocated corporate	(101,781		)	(102,688		)	6,378		5,593		7,496		1,536
Total consolidated	$	224,766		$	168,328		$	97,675	$	91,116	$	53,928	$	29,609

Revenue for each significant product or service offering is as follows:



	Three Months Ended				Nine Months Ended
	September 30, 2017		September 24, 2016		September 30, 2017		September 24, 2016
	(in thousands)
RMS	$	122,020	$	120,928	$	373,183	$	369,325
DSA	246,946		215,817		726,796		594,859
Manufacturing	95,266		88,975		279,145		250,459
Total revenue	$	464,232	$	425,720	$	1,379,124	$	1,214,643

A summary of unallocated corporate expense consists of the following:



	Three Months Ended				Nine Months Ended
	September 30, 2017		September 24, 2016		September 30, 2017		September 24, 2016
	(in thousands)
Stock-based compensation	$	7,255	$	6,739	$	20,259	$	20,593
Compensation, benefits, and other employee-related expenses	11,771		9,048		37,812		29,327
External consulting and other service expenses	6,729		4,545		16,581		16,377
Information technology	3,237		2,903		9,247		8,399
Depreciation	2,287		2,011		6,378		5,593
Acquisition and integration	1,327		2,033		2,539		13,056
Other general unallocated corporate	2,675		3,164		8,965		9,343
Total unallocated corporate expense	$	35,281	$	30,443	$	101,781	$	102,688

Other general unallocated corporate expense consists of various departmental costs including those associated with departments such as senior executives, corporate accounting, legal, tax, human resources, treasury, and investor relations.