10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark One)

[ X ] Quarterly Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the quarterly period ended March 30, 2014 or

[    ] Transition Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 for the transition period from __________ to __________

Commission File Number 001-34218

COGNEX CORPORATION

(Exact name of registrant as specified in its charter)

Massachusetts	04-2713778
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

One Vision Drive

Natick, Massachusetts 01760-2059

(508) 650-3000

(Address, including zip code, and telephone number, including area code, of principal executive offices)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  

Yes X No

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    

Yes X No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act (Check one):

Large accelerated filer	X	Accelerated filer
Non-accelerated filer		Smaller reporting company

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    

Yes No X

As of March 30, 2014, there were 86,840,001 shares of Common Stock, $.002 par value per share, of the registrant outstanding.

INDEX

PART I	FINANCIAL INFORMATION
Item 1.	Financial Statements (interim periods unaudited)	3
	Consolidated Statements of Operations for the three-month periods ended March 30, 2014 and March 31, 2013	3
	Consolidated Statements of Comprehensive Income for the three-month periods ended March 30, 2014 and March 31, 2013	4
	Consolidated Balance Sheets as of March 30, 2014 and December 31, 2013	5
	Consolidated Condensed Statements of Cash Flows for the three-month periods ended March 30, 2014 and March 31, 2013	6
	Consolidated Statement of Shareholders’ Equity for the three-month period ended March 30, 2014	7
	Notes to Consolidated Financial Statements	8
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	20
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	24
Item 4.	Controls and Procedures	24
PART II	OTHER INFORMATION
Item 1.	Legal Proceedings	25
Item 1A.	Risk Factors	25
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	26
Item 3.	Defaults Upon Senior Securities	26
Item 4.	Mine Safety Disclosures	26
Item 5.	Other Information	26
Item 6.	Exhibits	27
	Signatures	28

2

COGNEX CORPORATION

CONSOLIDATED STATEMENTS OF OPERATIONS

(In thousands, except per share amounts)

	Three-months Ended
	March 30, 2014			March 31, 2013
	(unaudited)
Revenue
Product	$	83,569		$	74,672
Service	7,360			6,220
	90,929			80,892
Cost of revenue
Product	17,286			16,464
Service	3,798			2,959
	21,084			19,423
Gross margin
Product	66,283			58,208
Service	3,562			3,261
	69,845			61,469
Research, development, and engineering expenses	12,502			11,321
Selling, general, and administrative expenses	34,900			32,167
Operating income	22,443			17,981
Foreign currency gain (loss)	(110		)	63
Investment income	787			392
Other income (expense)	(273		)	117
Income before income tax expense	22,847			18,553
Income tax expense	4,341			2,970
Net income	$	18,506		$	15,583
Earnings per weighted-average common and common-equivalent share (1):
Basic	$	0.21		$	0.18
Diluted	$	0.21		$	0.18
Weighted-average common and common-equivalent shares outstanding (1):
Basic	86,879			86,522
Diluted	89,259			88,260

(1) Prior period results have been adjusted to reflect the two-for-one stock split effected in the form of a stock dividend which occurred in the third quarter of 2013.

The accompanying notes are an integral part of these consolidated financial statements.

3

COGNEX CORPORATION

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(in thousands)

	Three-months Ended
	March 30, 2014			March 31, 2013
	(unaudited)
Net income	$	18,506		$	15,583
Other comprehensive income (loss), net of tax:
Cash flow hedges:
Change in net unrealized gain (loss), net of tax of ($16) and $0 in 2014 and 2013, respectively	(166		)	—
Reclassification adjustments for loss (gain) included in net income	33			—
Net change related to cash flow hedges	(199		)	—
Available-for-sale investments:
Change in net unrealized gain (loss), net of tax of $113 and $42 in 2014 and 2013, respectively	518			142
Reclassification adjustments for loss (gain) included in net income	(501		)	(31		)
Net change related to available-for-sale investments	1,019			173
Currency translation adjustments:
Change in currency translation adjustments, net of tax of $7 and ($227) in 2014 and 2013, respectively	445			(2,494		)
Net change related to currency translation adjustments	445			(2,494		)
Other comprehensive income (loss), net of tax	1,265			(2,321		)
Total comprehensive income	$	19,771		$	13,262

The accompanying notes are an integral part of these consolidated financial statements.

4

COGNEX CORPORATION

CONSOLIDATED BALANCE SHEETS

(In thousands)

	March 30, 2014			December 31, 2013
	(unaudited)
ASSETS
Current assets:
Cash and cash equivalents	$	42,463		$	40,644
Short-term investments	41,777			184,822
Accounts receivable, less reserves of $1,328 and $1,354 in 2014 and 2013, respectively	51,947			53,015
Inventories	28,434			25,694
Deferred income taxes	7,463			7,611
Prepaid expenses and other current assets	17,797			20,265
Total current assets	189,881			332,051
Long-term investments	379,916			229,655
Property, plant, and equipment, net	37,826			37,136
Deferred income taxes	12,288			12,307
Intangible assets, net	13,807			14,723
Goodwill	81,689			81,689
Other assets	2,110			2,138
	$	717,517		$	709,699
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	9,671		$	9,487
Accrued expenses	26,140			34,331
Accrued income taxes	276			1,263
Deferred revenue and customer deposits	16,443			15,941
Total current liabilities	52,530			61,022
Reserve for income taxes	3,939			4,765
Commitments and contingencies (Note 7)
Shareholders’ equity (1):
Common stock, $.002 par value – Authorized: 140,000 shares, issued and outstanding: 86,840 and 86,831 shares in 2014 and 2013, respectively	174			174
Additional paid-in capital	223,560			211,440
Retained earnings	466,350			462,131
Accumulated other comprehensive loss, net of tax	(29,036		)	(29,833		)
Total shareholders’ equity	661,048			643,912
	$	717,517		$	709,699

The accompanying notes are an integral part of these consolidated financial statements.

5

COGNEX CORPORATION

CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS

(In thousands)

	Three-months Ended
	March 30, 2014			March 31, 2013
	(unaudited)
Cash flows from operating activities:
Net income	$	18,506		$	15,583
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	4,004			3,298
Depreciation of property, plant, and equipment	1,990			1,828
Amortization of intangible assets	916			961
Amortization of discounts or premiums on investments	896			758
Realized gain on sale of investments	(501		)	(31		)
Tax effect of stock option exercises	(2,165		)	(1,376		)
Change in deferred income taxes	127			(1,371		)
Change in operating assets and liabilities	(6,312		)	(860		)
Net cash provided by operating activities	17,461			18,790
Cash flows from investing activities:
Purchases of investments	(124,734		)	(76,694		)
Maturities and sales of investments	117,753			48,248
Purchases of property, plant, and equipment	(2,685		)	(1,908		)
Net cash used in investing activities	(9,666		)	(30,354		)
Cash flows from financing activities:
Issuance of common stock under stock option plans	5,951			9,168
Repurchase of common stock	(14,287		)	—
Tax effect of stock option exercises	2,165			1,376
Net cash provided by (used in) financing activities	(6,171		)	10,544
Effect of foreign exchange rate changes on cash and cash equivalents	195			(1,383		)
Net change in cash and cash equivalents	1,819			(2,403		)
Cash and cash equivalents at beginning of period	40,644			45,160
Cash and cash equivalents at end of period	$	42,463		$	42,757

The accompanying notes are an integral part of these consolidated financial statements.

6

COGNEX CORPORATION

CONSOLIDATED STATEMENT OF SHAREHOLDERS’ EQUITY

(In thousands)

	Common Stock				Additional Paid-in		Retained			Accumulated Other Comprehensive			Total Shareholders’
	Shares		Par Value		Capital		Earnings			Loss			Equity
Balance as of December 31, 2013	86,831		$	174	$	211,440	$	462,131		$	(29,833	)	$	643,912
Issuance of common stock under stock option plans	389		—		5,951		—			—			5,951
Repurchase of common stock	(380	)	—		—		(14,287		)	—			(14,287		)
Stock-based compensation expense	—		—		4,004		—			—			4,004
Excess tax benefit from stock option exercises	—		—		2,165		—			—			2,165
Net income	—		—		—		18,506			—			18,506
Net unrealized loss on cash flow hedges, net of tax of $16	—		—		—		—			(199		)	(199		)
Reclassification of net realized loss on cash flow hedges	—		—		—		—			33			33
Net unrealized gain on available-for-sale investments, net of tax of $113	—		—		—		—			1,019			1,019
Reclassification of net realized gain on the sale of available-for-sale investments	—		—		—		—			(501		)	(501		)
Foreign currency translation adjustment, net of tax of $7	—		—		—		—			445			445
Balance as of March 30, 2014 (unaudited)	86,840		$	174	$	223,560	$	466,350		$	(29,036	)	$	661,048

The accompanying notes are an integral part of these consolidated financial statements.

7

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

NOTE 1: Summary of Significant Accounting Policies

As permitted by the rules of the Securities and Exchange Commission applicable to Quarterly Reports on Form 10-Q, these notes are condensed and do not contain all disclosures required by generally accepted accounting principles (GAAP). Reference should be made to the consolidated financial statements and related notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.

In the opinion of the management of Cognex Corporation (the “Company”), the accompanying consolidated unaudited financial statements contain all adjustments, consisting of normal, recurring adjustments and financial statement reclassifications necessary to present fairly the Company’s financial position as of March 30, 2014, and the results of its operations for the three-month periods ended March 30, 2014 and March 31, 2013, and changes in shareholders’ equity, comprehensive income, and cash flows for the periods presented.

The results disclosed in the Consolidated Statements of Operations for the three-month period ended March 30, 2014 are not necessarily indicative of the results to be expected for the full year.

NOTE 2: Fair Value Measurements

Financial Assets and Liabilities that are Measured at Fair Value on a Recurring Basis

The following table summarizes the financial assets and liabilities required to be measured at fair value on a recurring basis as of March 30, 2014 (in thousands):

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Assets:
Money market instruments	$	5,723	$	—
Corporate bonds	—		224,352
Treasury bills	—		86,804
Asset-backed securities	—		74,885
Sovereign bonds	—		20,417
Municipal bonds	—		11,779
Agency bonds	—		1,500
Cash flow hedge forward contracts	—		33
Liabilities:
Cash flow hedge forward contracts	—		112

The Company’s money market instruments are reported at fair value based upon the daily market price for identical assets in active markets, and are therefore classified as Level 1.

The Company’s debt securities and forward contracts are reported at fair value based upon model-driven valuations in which all significant inputs are observable or can be derived from or corroborated by observable market data for substantially the full term of the asset or liability, and are therefore classified as Level 2. Management is responsible for estimating the fair value of these financial assets and liabilities, and in doing so, considers valuations provided by a large, third-party pricing service. For debt securities, this service maintains regular contact with market makers, brokers, dealers, and analysts to gather information on market movement, direction, trends, and other specific data. They use this information to structure yield curves for various types of debt securities and arrive at the daily valuations. The Company's forward contracts are typically traded or executed in over-the-counter markets with a high degree of pricing transparency. The market participants are generally large commercial banks.

The Company did not record an other-than-temporary impairment of these financial assets or liabilities during the three-month period ended March 30, 2014.

Financial Assets that are Measured at Fair Value on a Non-recurring Basis

The Company has an interest in a limited partnership, which is accounted for using the cost method and is required to be measured at fair value on a non-recurring basis. Management is responsible for estimating the fair value of this investment, and in doing so, considers valuations of the partnership’s investments as determined by the General Partner. Publicly-traded investments in active markets are reported at the market closing price less a discount, as

8

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

appropriate, to reflect restricted marketability. Fair value for private investments for which observable market prices in active markets do not exist is based upon the best information available including the value of a recent financing, reference to observable valuation measures for comparable companies (such as revenue multiples), public or private transactions (such as the sale of a comparable company), and valuations for publicly-traded comparable companies. The valuations also incorporate the General Partner’s own judgment and close familiarity with the business activities of each portfolio company. Significant increases or decreases in any of these inputs in isolation may result in a significantly lower or higher fair value measurement. The portfolio consists of securities of public and private companies, and consequently, inputs used in the fair value calculation are classified as Level 3. The Company did not record an other-than-temporary impairment of this asset during the three-month period ended March 30, 2014.

Non-financial Assets that are Measured at Fair Value on a Non-recurring Basis

Non-financial assets such as goodwill, intangible assets, and property, plant, and equipment are required to be measured at fair value only when an impairment loss is recognized. The Company did not record an impairment charge related to these assets during the three-month period ended March 30, 2014.

NOTE 3: Cash, Cash Equivalents, and Investments

Cash, cash equivalents, and investments consisted of the following (in thousands):

	March 30, 2014		December 31, 2013
Cash	$	36,740	$	40,124
Money market instruments	5,723		520
Cash and cash equivalents	42,463		40,644
Corporate bonds	33,585		109,040
Municipal bonds	4,766		9,276
Sovereign bonds	3,016		11,448
Asset-backed securities	410		53,559
Agency bonds	—		1,499
Short-term investments	41,777		184,822
Corporate bonds	190,767		109,909
Treasury bills	86,804		73,666
Asset-backed securities	74,475		21,820
Sovereign bonds	17,401		16,385
Municipal bonds	7,013		5,919
Agency bonds	1,500		—
Limited partnership interest	1,956		1,956
Long-term investments	379,916		229,655
	$	464,156	$	455,121

The Company’s investment portfolio includes corporate bonds, municipal bonds, sovereign bonds, asset-backed securities, treasury bills, and agency bonds. Corporate bonds consist of debt securities issued by both domestic and foreign companies; municipal bonds consist of debt securities issued by state and local government entities; sovereign bonds consist of direct debt issued by foreign governments; asset-backed securities consist of debt securities collateralized by pools of receivables or loans with credit enhancement; treasury bills consist of debt securities issued by both the U.S. and foreign governments; and agency bonds consist of domestic or foreign obligations of government agencies and government sponsored enterprises that have government backing.

9

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

The following table summarizes the Company’s available-for-sale investments as of March 30, 2014 (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Short-term:
Corporate bonds	$	33,480	$	105	$	—		$	33,585
Municipal bonds	4,758		8		—			4,766
Sovereign bonds	2,996		20		—			3,016
Asset-backed securities	410		—		—			410
Long-term:
Corporate bonds	190,185		680		(98		)	190,767
Treasury bills	86,941		2		(139		)	86,804
Asset-backed securities	74,471		69		(65		)	74,475
Sovereign bonds	17,367		52		(18		)	17,401
Municipal bonds	6,968		45		—			7,013
Agency bonds	1,500		—		—			1,500
	$	419,076	$	981	$	(320	)	$	419,737

The following table summarizes the Company’s gross unrealized losses and fair values for available-for-sale investments in an unrealized loss position as of March 30, 2014 (in thousands):

	Unrealized Loss Position For:
	Less than 12 Months					12 Months or Greater					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Corporate bonds	$	55,024	$	(98	)	$	—	$	—		$	55,024	$	(98	)
Asset-backed securities	23,535		(38		)	8,456		(27		)	31,991		(65		)
Sovereign bonds	3,347		(18		)	—		—			3,347		(18		)
Treasury bills	82,753		(139		)	—		—			82,753		(139		)
	$	164,659	$	(293	)	$	8,456	$	(27	)	$	173,115	$	(320	)

As of March 30, 2014, the Company did not recognize an other-than-temporary impairment of these investments. In its evaluation, management considered the type of security, the credit rating of the security, the length of time the security has been in a loss position, the size of the loss position, our intent and ability to hold the security to expected recovery of value, and other meaningful information. The Company does not intend to sell, and is unlikely to be required to sell, any of these available-for-sale investments before its effective maturity or market price recovery.

The Company recorded gross realized gains and gross realized losses on the sale of investments totaling $512,000 and $11,000, respectively, during the three-month period ended March 30, 2014 and $50,000 and $19,000, respectively, during the three-month period ended March 31, 2013. These gains and losses are included in "Investment income" on the Consolidated Statements of Operations.

The following table presents the effective maturity dates of the Company’s available-for-sale investments as of March 30, 2014 (in thousands):

	1 Year or Less		1-2 Years		2-3 Years		3-4 Years		4-5 Years		5-8 Years		Total
Corporate bonds	$	33,585	$	64,435	$	94,424	$	2,428	$	29,480	$	—	$	224,352
Treasury bills	—		32,317		54,487		—		—		—		86,804
Asset-backed securities	410		5,287		14,663		29,396		21,243		3,886		74,885
Sovereign bonds	3,016		12,502		4,899		—		—		—		20,417
Municipal bonds	4,766		3,981		1,475		1,557		—		—		11,779
Agency bonds	—		—		1,500		—		—		—		1,500
	$	41,777	$	118,522	$	171,448	$	33,381	$	50,723	$	3,886	$	419,737

10

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

The Company is a Limited Partner in Venrock Associates III, L.P. (Venrock), a venture capital fund. The Company has committed to a total investment in the limited partnership of up to $20,500,000, with an expiration date of December 31, 2015. As of March 30, 2014, the Company contributed $19,886,000 to the partnership. The remaining commitment of $614,000 can be called by Venrock at any time before December 31, 2015. Distributions and contributions are at the discretion of Venrock’s management. No contributions were made and no distributions were received during the three-month period ended March 30, 2014.

NOTE 4: Inventories

Inventories consisted of the following (in thousands):

	March 30, 2014		December 31, 2013
Raw materials	$	12,958	$	13,101
Work-in-process	7,521		4,472
Finished goods	7,955		8,121
	$	28,434	$	25,694

NOTE 5: Intangible Assets and Goodwill

The Company evaluates the possible impairment of goodwill and other intangible assets whenever events or circumstances indicate that the carrying value of these assets may not be recoverable. No triggering event occurred in the three-month period ended March 30, 2014 that would indicate a potential impairment of goodwill or other intangible assets.

NOTE 6: Warranty Obligations

The Company records the estimated cost of fulfilling product warranties at the time of sale based upon historical costs to fulfill claims. Obligations may also be recorded subsequent to the time of sale whenever specific events or circumstances impacting product quality become known that would not have been taken into account using historical data. While we engage in extensive product quality programs and processes, including actively monitoring and evaluating the quality of our component suppliers and third-party contract manufacturers, the Company’s warranty obligation is affected by product failure rates, material usage, and service delivery costs incurred in correcting a product failure. An adverse change in any of these factors may result in the need for additional warranty provisions. Warranty obligations are included in “Accrued expenses” on the Consolidated Balance Sheets.

The changes in the warranty obligations were as follows (in thousands):

Balance as of December 31, 2013	$	3,016
Provisions for warranties issued during the period	759
Fulfillment of warranty obligations	(524		)
Foreign exchange rate changes	8
Balance as of March 30, 2014	$	3,259

NOTE 7: Contingencies

In May 2008, the Company filed a complaint against MvTec Software GmbH, MvTec LLC, and Fuji America Corporation in the United States District Court for the District of Massachusetts alleging infringement of certain patents owned by the Company. This matter is ongoing.

In May 2009, the Company pre-filed a complaint with the United States International Trade Commission (ITC) pursuant to Section 337 of the Tariff Act of 1930, as amended, 19 U.S.C. §1337, against MvTec Software GmbH, MvTec LLC, Fuji America, and several other respondents alleging unfair methods of competition and unfair acts in the unlawful importation into the United States, sale for importation, or sale within the United States after importation. By this filing, the Company requested the ITC to investigate the Company’s contention that certain machine vision software, machine vision systems, and products containing the same infringe, and respondents directly infringe and/or actively induce and/or contribute to the infringement in the United States, of one or more of the Company’s U.S. patents. In July 2009, the ITC issued an order that it would institute an investigation based upon the Company’s assertions. In September 2009, the Company reached a settlement with two of the respondents, and in December 2009, the Company reached a settlement with five additional respondents. In March 2010, the Company reached a settlement with respondent Fuji Machine Manufacturing Co., Ltd. and its subsidiary Fuji America Corporation. These settlements did not have a material impact on the Company’s financial results. An ITC hearing was held in May 2010. In July 2010, the Administrative Law

11

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

Judge issued an initial determination finding two of the Company’s patents invalid and that respondents did not infringe the patents-at-issue. In September 2010, the ITC issued a notice that it would review the initial determination of the Administrative Law Judge. The ITC issued its Final Determination in November 2010 in which it determined to modify-in-part and affirm-in-part the Administrative Law Judge’s determination, and terminate the investigation with a finding of no violation of Section 337 of the Tariff Act of 1930 (as amended 19 U.S.C. §1337). The Company has filed an appeal of the decision with the United States Court of Appeals for the Federal Circuit. An oral hearing before the United States Court of Appeals occurred in February 2012. In December 2013, the Federal Circuit affirmed the ITC’s finding of non-infringement, but did not address the ITC’s finding regarding validity.

In March 2013, the Company filed a lawsuit against Microscan Systems, Inc. (“Microscan”) and Code Corporation in the United States District Court for the Southern District of New York alleging that Microscan’s Mobile Hawk handheld imager infringes U.S. Patent 7,874,487 owned by the Company. The lawsuit seeks to prohibit Code Corporation from manufacturing the product, and Microscan from selling and distributing the product. The Company is also seeking monetary damages resulting from the alleged infringement. Both parties have filed motions for summary judgment and a hearing on these motions was held in October 2013. Trial was originally scheduled for October 2013, but has been moved to April 2014. This matter is ongoing.

The Company cannot predict the outcome of the above-referenced pending matters and an adverse resolution of these lawsuits could have a material adverse effect on the Company’s financial position, liquidity, results of operations, and/or indemnification obligations. In addition, various other claims and legal proceedings generally incidental to the normal course of business are pending or threatened on behalf of or against the Company. While we cannot predict the outcome of these incidental matters, we believe that any liability arising from them will not have a material adverse effect on our financial position, liquidity, or results of operations.

NOTE 8: Guarantees

In the ordinary course of business, the Company enters into guarantee contracts with certain customers, generally in the Company’s Surface Inspection Systems Division (SISD) business. These guarantees represent standby letters of credit (LOC) which can be grouped into three categories: (1) bank guarantees which may require the Company to return a customer’s initial payment if the Company cannot deliver the order; (2) warranty bonds which may require the Company to resolve warranty issues within a specified time period; and (3) performance bonds which include a combination of the above two options. The type of LOC is generally determined based upon customer request and the guarantee amount represents the maximum potential amount of future payments. All of the Company’s LOCs are with the same counterparty and they do not contain any recourse provisions or collateral obligations.

The following table details the letters of credit outstanding as of March 30, 2014:

Type	Guarantee Amount (in thousands)		Guarantee Due Date
Warranty bonds	$	976	Various from April 2014 to June 2016
Performance bonds	398		Various from June 2014 to July 2016
Bank guarantees	373		Various from April 2014 to July 2014
	$	1,747

The Company evaluates losses for guarantees under accounting for contingencies. The Company considers such factors as the degree of probability that the Company would be required to satisfy the guarantee and the ability to make a reasonable estimate of the loss. To date, the Company has not incurred any losses as a result of these obligations, and therefore, has not recorded any liability related to such obligation in its financial statements. The fair value of the Company’s outstanding guarantees is immaterial for all periods presented.

NOTE 9: Indemnification Provisions

Except as limited by Massachusetts law, the by-laws of the Company require it to indemnify certain current or former directors, officers, and employees of the Company against expenses incurred by them in connection with each proceeding in which he or she is involved as a result of serving or having served in certain capacities. Indemnification is not available with respect to a proceeding as to which it has been adjudicated that the person did not act in good faith in the reasonable belief that the action was in the best interests of the Company. The maximum potential amount of future payments the Company could be required to make under these provisions is unlimited. The Company has never incurred significant costs related to these indemnification provisions. As a result, the Company believes the estimated fair value of these provisions is minimal.

12

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

In the ordinary course of business, the Company may accept standard limited indemnification provisions in connection with the sale of its products, whereby it indemnifies its customers for certain direct damages incurred in connection with third-party patent or other intellectual property infringement claims with respect to the use of the Company’s products. The term of these indemnification provisions generally coincides with the customer’s use of the Company’s products. The maximum potential amount of future payments the Company could be required to make under these provisions is generally subject to fixed monetary limits. The Company has never incurred significant costs to defend lawsuits or settle claims related to these indemnification provisions. As a result, the Company believes the estimated fair value of these provisions is minimal.

In the ordinary course of business, the Company also accepts limited indemnification provisions from time to time, whereby it indemnifies customers for certain direct damages incurred in connection with bodily injury and property damage arising from the installation of the Company’s products. The term of these indemnification provisions generally coincides with the period of installation. The maximum potential amount of future payments the Company could be required to make under these provisions is generally limited and is likely recoverable under the Company’s insurance policies. As a result of this coverage, and the fact that the Company has never incurred significant costs to defend lawsuits or settle claims related to these indemnification provisions, the Company believes the estimated fair value of these provisions is minimal.

NOTE 10: Derivative Instruments

The Company is exposed to certain risks relating to its ongoing business operations including foreign currency exchange rate risk and interest rate risk. The Company currently mitigates certain foreign currency exchange rate risks with derivative instruments. The Company does not currently manage its interest rate risk with derivative instruments.

The Company faces exposure to foreign currency exchange rate fluctuations, as a significant portion of its revenues, expenses, assets, and liabilities are denominated in currencies other than the functional currencies of the Company’s subsidiaries or the reporting currency of the Company, which is the U.S. Dollar. The Company faces two types of foreign currency exchange rate exposures: 

• Transactional currency/functional currency exchange rate exposures from transactions that are denominated in currencies other than the functional currency of the subsidiary. These transaction gains and losses are reported in "Foreign currency gain (loss)" on the Consolidated Statements of Operations.

• Functional currency/reporting currency exchange rate exposures from the revaluation of the assets and liabilities of our foreign subsidiaries, whose functional currency is generally their local currency, to the Company’s reporting currency, which is the U.S. Dollar. These translation gains and losses are reported in “Accumulated other comprehensive loss” on the Consolidated Balance Sheets and also on the Consolidated Statements of Comprehensive Income.

The Company’s foreign currency risk management strategy is principally designed to mitigate the potential financial impact of changes in the value of transactions and balances denominated in foreign currencies resulting from changes in foreign currency exchange rates. Currently, the Company enters into two types of hedges to manage this risk. The first are economic hedges which utilize foreign currency forward contracts with maturities of up to 45 days to manage the exposure to fluctuations in foreign currency exchange rates arising primarily from foreign-denominated receivables and payables. The gains and losses on these derivatives are largely offset by changes in the fair value of the assets and liabilities being hedged. The second are cash flow hedges which utilize foreign currency forward contracts with maturities of up to 18 months to hedge specific forecasted transactions of the Company's foreign subsidiaries with the goal of protecting our budgeted revenues and expenses against foreign currency exchange rate changes compared to our budgeted rates.

13

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

The Company had the following outstanding forward contracts that were entered into to mitigate foreign currency exchange rate risk (in thousands):

	As of March 30, 2014			As of December 31, 2013
Currency	Notional Value	USD Equivalent		Notional Value	USD Equivalent
Derivatives Designated as Hedging Instruments:
Japanese Yen	665,000	$	6,514	625,000	$	6,122
Hungarian Forint	639,750	2,872		570,175	2,603
Singapore Dollar	3,049	2,472		2,867	2,346
British Pound	673	1,112		613	1,010
Canadian Dollar	1,199	1,107		985	932
Derivatives Not Designated as Hedging Instruments:
Euro	—	$	—	2,828	$	3,887
Japanese Yen	—	—		294,500	2,797
British Pound	—	—		1,100	1,820
Chinese Renminbi	—	—		9,000	1,467
Taiwanese Dollar	—	—		27,000	908
Korean Won	—	—		650,000	620
Hungarian Forint	—	—		123,000	568
Brazilian Real	—	—		250	106

Information regarding the fair value of the outstanding forward contracts was as follows (in thousands):

	Asset Derivatives					Liability Derivatives
	Balance	Fair Value				Balance	Fair Value
	Sheet Location	March 30, 2014		December 31, 2013		Sheet Location	March 30, 2014		December 31, 2013
Derivatives Designated as Hedging Instruments:
Cash flow hedge forward contracts	Prepaid expenses and other current assets	$	33	$	204	Accrued expenses	$	112	$	98
Derivatives Not Designated as Hedging Instruments:
Economic hedge forward contracts	Prepaid expenses and other current assets	$	—	$	6	Accrued expenses	$	—	$	24

14

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

The table below details the gross activity for all derivative assets and liabilities which were presented on a net basis on the Consolidated Balance Sheets due to the right of offset with one counterparty (in thousands):

Asset Derivatives						Liability Derivatives
	March 30, 2014			December 31, 2013			March 30, 2014			December 31, 2013
Gross amounts of recognized assets	$	38		$	210	Gross amounts of recognized liabilities	$	128		$	122
Gross amounts offset	(5		)	—		Gross amounts offset	(16		)	—
Net amount of assets presented	33			210		Net amount of liabilities presented	112			122

Information regarding the effect of derivative instruments, net of the underlying exposure, on the consolidated financial statements was as follows (in thousands):

	Location in Financial Statements	Three-months Ended
		March 30, 2014			March 31, 2013
Derivatives Designated as Hedging Instruments:
Gains (losses) in Shareholders' equity on derivatives (effective portion)	Accumulated other comprehensive income (loss), net of tax	$	(62	)	$	—
Gains (losses) reclassified from accumulated other comprehensive income (loss) into net income (effective portion)	Product revenue	$	13		$	—
	Research, development, and engineering expenses	(30		)	—
	Selling, general, and administrative expenses	(16		)	—
	Total gains (losses) reclassified from accumulated other comprehensive income (loss) into net income	$	(33	)	$	—
Gains (losses) recognized in net income on derivatives (ineffective portion and discontinued derivatives)	Foreign currency gain (loss)	$	—		$	—
Derivatives Not Designated as Hedging Instruments:
Gains (losses) recognized in net income	Foreign currency gain (loss)	$	(152	)	$	203

The following table provides the changes in accumulated other comprehensive income (loss), net of tax, related to derivative instruments (in thousands):

	Three-months ended
	March 30, 2014			March 31, 2013
Beginning balance	$	104		$	—
Amount of loss (gain) reclassified to net income	33			—
Change in fair value of derivative instruments	(199		)	—
Ending balance	$	(62	)	$	—

Net losses expected to be reclassified from accumulated other comprehensive income (loss), net of tax, into net income within the next twelve months are $66,000.

15

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

NOTE 11: Stock-Based Compensation Expense

The Company’s share-based payments that result in compensation expense consist solely of stock option grants. As of March 30, 2014, the Company had 10,024,230 shares available for grant. Generally, stock options are granted with an exercise price equal to the market value of the Company’s common stock at the grant date, vest over four years based upon continuous service, and expire ten years from the grant date.

The following table summarizes the Company’s stock option activity for the three-month period ended March 30, 2014:

	Shares (in thousands)		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding as of December 31, 2013	6,138		$	15.65
Granted	1,206		39.31
Exercised	(396	)	15.02
Forfeited or expired	(73	)	18.02
Outstanding as of March 30, 2014	6,875		$	19.80	7.4	$	98,435
Exercisable as of March 30, 2014	2,481		$	13.59	5.8	$	48,212
Options vested or expected to vest at   March 30, 2014 (1)	6,130		$	18.93	7.2	$	92,123

 (1) In addition to the vested options, the Company expects a portion of the unvested options to vest at some point in the future. Options expected to vest are calculated by applying an estimated forfeiture rate to the unvested options.

The fair values of stock options granted in each period presented were estimated using the following weighted-average assumptions:

	Three-months Ended
	March 30, 2014		March 31, 2013
Risk-free rate	2.7	%	2.1	%
Expected dividend yield	—	%	—	%
Expected volatility	41	%	42	%
Expected term (in years)	5.4		5.9

Risk-free rate

The risk-free rate was based upon a treasury instrument whose term was consistent with the contractual term of the option.

Expected dividend yield

Generally, the current dividend yield is calculated by annualizing the cash dividend declared by the Company’s Board of Directors and dividing that result by the closing stock price on the grant date. However, in the fourth quarter of 2012, the Company paid the full annual dividends for 2013 and 2014 in advance, and therefore, the dividend yield for those years has been adjusted to zero. At the time of the 2014 valuation, a dividend yield of 0.56% was estimated for future periods from 2015 through the expected life of the option.

Expected volatility

The expected volatility was based upon a combination of historical volatility of the Company’s common stock over the contractual term of the option and implied volatility for traded options of the Company’s stock.

Expected term

The expected term was derived from the binomial lattice model from the impact of events that trigger exercises over time.

The weighted-average grant-date fair values of stock options granted during the three-month periods ended March 30, 2014 and March 31, 2013 were $15.34 and $8.07, respectively.

16

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

The Company stratifies its employee population into two groups: one consisting of senior management and another consisting of all other employees. The Company currently expects that approximately 72% of its stock options granted to senior management and 70% of its options granted to all other employees will actually vest. Therefore, the Company currently applies an estimated annual forfeiture rate of 11% to all unvested options for senior management and a rate of 12% for all other employees. The Company revised its estimated forfeiture rates in the first quarters of 2014 and 2013, resulting in an increase to compensation expense of $288,000 and $300,000, respectively.

The total stock-based compensation expense and the related income tax benefit recognized for the three-month period ended March 30, 2014 were$4,004,000 and $1,306,000, respectively, and for the three-month period ended March 31, 2013 were $3,298,000 and $1,094,000, respectively. No compensation expense was capitalized as of March 30, 2014 or December 31, 2013.

The following table details the stock-based compensation expense by caption for each period presented on the Consolidated Statements of Operations (in thousands):

	Three-months Ended
	March 30, 2014		March 31, 2013
Product cost of revenue	$	285	$	227
Service cost of revenue	63		63
Research, development, and engineering	1,056		813
Selling, general, and administrative	2,600		2,195
	$	4,004	$	3,298

The total intrinsic values of stock options exercised for the three-month periods ended March 30, 2014 and March 31, 2013 were $8,933,000 and $7,193,000, respectively. The total fair values of stock options vested for the three-month periods ended March 30, 2014 and March 31, 2013 were $8,361,000 and $6,932,000, respectively.

As of March 30, 2014, total unrecognized compensation expense related to non-vested stock options was $19,791,000, which is expected to be recognized over a weighted-average period of 1.60 years.

NOTE 12: Stock Repurchase Program

In April 2008, the Company’s Board of Directors authorized the repurchase of up to $50,000,000 of the Company’s common stock, primarily as a means to reduce the dilutive effect of employee stock options. Stock repurchases under this program were completed in 2013. In November 2011, the Company’s Board of Directors authorized the repurchase of up to $80,000,000 of the Company’s common stock to help reduce the dilutive effect of employee stock options. Purchases under this 2011 program began in 2013 upon completion of the 2008 program. As of March 30, 2014, the Company repurchased a total of 1,272,000 shares at a cost of $42,195,000, including 380,000 shares at a cost of $14,287,000 in the first quarter of 2014. On April 29, 2014, the Company's Board of Directors authorized the repurchase of an additional $50,000,000 of the Company's stock. This new authorization will commence once the Company completes the November 2011 program. The Company may repurchase shares under this program in future periods depending upon a variety of factors, including, among other things, the impact of dilution from employee stock options, stock price, share availability, and cash requirements.

NOTE 13: Taxes

A reconciliation of the United States federal statutory corporate tax rate to the Company’s effective tax rate, or income tax provision, was as follows:

	Three-months Ended
	March 30, 2014		March 31, 2013
Income tax provision at federal statutory rate	35	%	35	%
State income taxes, net of federal benefit	1	%	2	%
Foreign tax rate differential	(17	)%	(17	)%
Tax credit	—	%	(1	)%
Discrete tax events	—	%	(3	)%
Income tax provision	19	%	16	%

17

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

The effective tax rate for the three-month period ended March 31, 2013 included a discrete event that decreased tax expense by $555,000, net of related reserves for income taxes, from the retroactive application of the 2012 research and development credit. The American Taxpayer Relief Act of 2012 was passed by Congress and signed into law on January 1, 2013. The provisions under this law were applied retroactively to January 1, 2012. As a result of the law being signed on January 1, 2013, the financial impact of the retroactive provision was recorded as a discrete event in the first quarter of 2013.This discrete tax event decreased the effective tax rate from a provision of 19% to a provision of 16% for the first quarter of 2013.

During the three-month period ended March 30, 2014, the Company recorded a $175,000increase in reserves for income taxes, net of deferred tax benefit, for uncertain tax positions that were recorded as income tax expense. Estimated interest and penalties included in these amounts totaled $40,000 for the three-month period ended March 30, 2014.

In the first quarter of 2014, management adopted Accounting Standards Update (ASU) 2013-11, "Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists." This ASU requires companies to present an unrecognized tax benefit, or a portion thereof, as a reduction to a deferred tax asset for a net operating loss (NOL) carryforward or a similar tax loss or tax credit carryforward. During the three-month period ended March 30, 2014, the Company reclassified a reserve for income taxes of $1,028,000 as a reduction to noncurrent deferred tax assets in compliance with this new guidance. Retroactive application was not required under this ASU, and therefore, prior periods were not restated.

The Company’s reserve for income taxes, including gross interest and penalties, was $4,967,000 as of March 30, 2014, which included $3,939,000 classified as a noncurrent liability and $1,028,000 recorded as a reduction to noncurrent deferred tax assets. The amount of gross interest and penalties included in these balances was $415,000. If the Company’s tax positions were sustained or the statutes of limitations related to certain positions expired, these reserves would be released and income tax expense would be reduced in a future period, less $451,000 that would be recorded through additional paid-in capital. As a result of the expiration of certain statutes of limitations and the conclusion of an IRS examination, there is a potential that a portion of these reserves could be released, which would decrease income tax expense by approximately $700,000 to $800,000 over the next twelve months.

The Company has defined its major tax jurisdictions as the United States, Ireland, China, and Japan, and within the United States, Massachusetts and California. Within the United States, the tax years 2012 through 2013 remain open to examination by various taxing authorities, while the tax years 2009 through 2013 remain open to examination by various taxing authorities in other jurisdictions in which the Company operates.

NOTE 14: Weighted-Average Shares

In July 2013, the Company’s Board of Directors declared a two-for-one stock split of the Company’s common stock, which was effected through a stock dividend distributed on September 16, 2013. All references made to share or per share amounts in the accompanying consolidated financial statements and applicable disclosures reflect this two-for-one stock split.

Weighted-average shares were calculated as follows (in thousands):

	Three-months Ended
	March 30, 2014	March 31, 2013
Basic weighted-average common shares outstanding	86,879	86,522
Effect of dilutive stock options	2,380	1,738
Weighted-average common and common-equivalent shares outstanding	89,259	88,260

Stock options to purchase 585,208 and 965,938 shares of common stock, on a weighted-average basis, were outstanding for the quarters ended March 30, 2014 and March 31, 2013, respectively, but were not included in the calculation of dilutive net income per share because they were anti-dilutive.

NOTE 15: Segment Information

The Company has two reportable segments: the Modular Vision Systems Division (MVSD) and the Surface Inspection Systems Division (SISD). MVSD develops, manufactures, and markets modular vision systems that are used to control the manufacture of discrete items by locating, identifying, inspecting, and measuring them during the manufacturing process. SISD develops, manufactures, and markets surface inspection vision systems that are used to inspect surfaces of materials processed in a continuous fashion, such as metals, paper, nonwoven, plastics, and glass, to ensure there

18

COGNEX CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

are no flaws or defects on the surfaces. Segments are determined based upon the way that management organizes its business for making operating decisions and assessing performance. The Company evaluates segment performance based upon income or loss from operations, excluding stock-based compensation expense.

The following table summarizes information about the segments (in thousands):

Three-months Ended    March 30, 2014	MVSD		SISD		Reconciling Items			Consolidated
Product revenue	$	77,618	$	5,951	$	—		$	83,569
Service revenue	3,698		3,662		—			7,360
Operating income	28,292		1,013		(6,862		)	22,443

Three-months Ended    March 31, 2013	MVSD		SISD		Reconciling Items			Consolidated
Product revenue	$	68,319	$	6,353	$	—		$	74,672
Service revenue	2,092		4,128		—			$	6,220
Operating income	22,076		1,732		(5,827		)	$	17,981

Reconciling items consist of stock-based compensation expense and unallocated corporate expenses, which primarily include corporate headquarters costs, professional fees, and patent infringement litigation. Additional asset information by segment is not produced internally for use by the chief operating decision maker, and therefore, is not presented. Additional asset information is not provided because cash and investments are commingled and the segments share assets and resources in a number of locations around the world.

19

ITEM 2: MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Forward-Looking Statements

Certain statements made in this report, as well as oral statements made by the Company from time to time, constitute forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Readers can identify these forward-looking statements by our use of the words “expects,” “anticipates,” “estimates,” “believes,” “projects,” “intends,” “plans,” “will,” “may,” “shall,” “could,” “should,” and similar words and other statements of a similar sense. These statements are based upon our current estimates and expectations as to prospective events and circumstances, which may or may not be in our control and as to which there can be no firm assurances given. These forward-looking statements, which include statements regarding business and market trends, future financial performance, customer order rates, expected areas of growth, emerging markets, future product mix, research and development activities, investments, and strategic plans, involve known and unknown risks and uncertainties that could cause actual results to differ materially from those projected. Such risks and uncertainties include: (1) current and future conditions in the global economy; (2) the cyclicality of the semiconductor and electronics industries; (3) the reliance on revenue from the automotive or consumer electronics industries; (4) the inability to penetrate new markets; (5) the inability to achieve significant international revenue; (6) fluctuations in foreign currency exchange rates and the use of derivative instruments; (7) the loss of a large customer; (8) the inability to attract and retain skilled employees; (9) the reliance upon key suppliers to manufacture and deliver critical components for our products; (10) the failure to effectively manage product transitions or accurately forecast customer demand; (11) the inability to design and manufacture high-quality products; (12) the technological obsolescence of current products and the inability to develop new products; (13) the failure to properly manage the distribution of products and services; (14) the inability to protect our proprietary technology and intellectual property; (15) our involvement in time-consuming and costly litigation; (16) the impact of competitive pressures; (17) the challenges in integrating and achieving expected results from acquired businesses; (18) potential impairment charges with respect to our investments or for acquired intangible assets or goodwill; (19) exposure to additional tax liabilities; and (20) information security breaches or business system disruptions. The foregoing list should not be construed as exhaustive and we encourage readers to refer to the detailed discussion of risk factors included in Part I—Item 1A of the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2013. The Company cautions readers not to place undue reliance upon any such forward-looking statements, which speak only as of the date made. The Company disclaims any obligation to subsequently revise forward-looking statements to reflect the occurrence of anticipated or unanticipated events or circumstances after the date such statements are made.

Executive Overview

Cognex Corporation is a leading worldwide provider of machine vision products that capture and analyze visual information in order to automate tasks, primarily in manufacturing processes, where vision is required. Our Modular Vision Systems Division (MVSD) specializes in machine vision systems that are used to automate the manufacture of discrete items, while our Surface Inspection Systems Division (SISD) specializes in machine vision systems that are used to inspect the surfaces of materials processed in a continuous fashion.

In addition to product revenue derived from the sale of machine vision systems and ID Products, the Company also generates revenue by providing maintenance and support, training, consulting, and installation services to its customers. Our customers can be classified into three primary markets: factory automation, semiconductor and electronics capital equipment, and surface inspection. 

• Factory automation customers, who are included in the Company’s MVSD segment, purchase Cognex vision products and incorporate them into their manufacturing processes. Virtually every manufacturer can achieve better quality and manufacturing efficiency by using machine vision, and therefore, this market includes a broad base of customers across a variety of industries, including automotive, consumer electronics, food and beverage, pharmaceutical, and medical devices. The factory automation market also includes customers who purchase Cognex vision products for use outside of the assembly process, such as using ID products in logistics automation for package sorting and distribution. Sales to factory automation customers represented 83% of total revenue in the first quarter of 2014.

• Semiconductor and electronics capital equipment manufacturers, who are included in the Company’s MVSD segment, purchase Cognex vision products and integrate them into the automation equipment that they manufacture and then sell to their customers to either make semiconductor chips or assemble printed circuit boards. Demand from these capital equipment manufacturers has historically been highly cyclical, with periods of investment followed by downturn. Sales to semiconductor and electronics capital equipment manufacturers represented 7% of total revenue in the first quarter of 2014.

20

• Surface vision customers, who comprise the Company’s SISD segment, are manufacturers of materials processed in a continuous fashion, such as metals, paper, nonwoven, plastics, and glass. These customers need sophisticated machine vision to detect, classify, and analyze defects on the surfaces of those materials as they are being processed at high speeds. Surface inspection sales represented 10% of total revenue in the first quarter of 2014.

Revenue for the first quarter of 2014 totaled $90,929,000, representing an increase of $10,037,000, or 12%, from the same period in the prior year driven by higher sales to customers in the factory automation market. Gross margin was 77% of revenue in the first quarter of 2014 compared to 76% in the first quarter of 2013 due to a higher percentage of revenue coming from the sale of relatively higher-margin MVSD products. Operating expenses increased by $3,914,000, or 9%, from the first quarter of 2013 due primarily to expenses associated with increased engineering and sales headcount. Operating income was $22,443,000, or 25% of revenue, in the first quarter of 2014 compared to $17,981,000, or 22% of revenue, in the first quarter of 2013; net income was $18,506,000, or 20% of revenue, in the first quarter of 2014 compared to $15,583,000, or 19% of revenue, in the first quarter of 2013; and net income per diluted share was $0.21 in the first quarter of 2014 compared to $0.18 in the first quarter of 2013.

Results of Operations

As foreign currency exchange rates are a factor in understanding period-to-period comparisons, we believe the presentation of results on a constant-currency basis in addition to reported results helps improve investors’ ability to understand our operating results and evaluate our performance in comparison to prior periods. We also use results on a constant-currency basis as one measure to evaluate our performance.  Constant-currency information compares results between periods as if exchange rates had remained constant period-over-period. We generally refer to such amounts calculated on a constant-currency basis as excluding the impact of foreign currency exchange rate changes. Results on a constant-currency basis are not in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) and should be considered in addition to, and not as a substitute for, results prepared in accordance with U.S. GAAP.

Revenue

Revenue for the first quarter of 2014 increased by $10,037,000, or 12%, from the first quarter of 2013. This increase was due to an $11,733,000 increase in sales to factory automation customers, partially offset by an $828,000 decrease in sales to semiconductor and electronics capital equipment customers and an $868,000 decrease in sales to surface inspection customers.

Factory Automation Market

Sales to customers in the factory automation market represented 83% of total revenue in the first quarter of 2014 compared to 78% in the first quarter of 2013. Sales to these customers increased by $11,733,000, or 19%, from the first quarter of 2013. Foreign currency exchange rate changes had little impact on total factory automation revenue, as the negative impact on revenue of a weaker Japanese Yen was offset by the positive impact of a stronger Euro in 2014. Geographically, the growth in factory automation revenue came predominantly in the Americas and Europe.

Generally, factory automation revenue declines from the fourth quarter to the first quarter, as many customers consume their remaining annual capital budgets during the last quarter of the year. As such, sales to factory automation customers decreased by $4,647,000, or 6%, from the fourth quarter of 2013. However, management expects factory automation revenue to grow in the second quarter of 2014 as compared to the first quarter.

Semiconductor and Electronics Capital Equipment Market

Sales to customers who make automation equipment for the semiconductor and electronics industries represented 7% and 9% of total revenue in the first quarters of 2014 and 2013, respectively. Sales to these customers decreased by $828,000, or 12%, from the first quarter of 2013, but increased by $978,000, or 19%, from the fourth quarter of 2013. The impact of foreign currency exchange rate changes on revenue was not significant to the semiconductor and electronics capital equipment market in either period. Despite this positive sequential momentum, the semiconductor and electronics capital equipment market has historically been highly cyclical and management has limited visibility regarding future order levels from these customers.

Surface Inspection Market

Sales to customers in the surface inspection market represented 10% of total revenue in the first quarter of 2014 compared to 13% in the first quarter of 2013. Revenue from these customers decreased by $868,000, or 8%, from the first quarter of 2013 and decreased by $1,098,000, or 10%, from the fourth quarter of 2013. The impact of foreign currency exchange rate changes on revenue was not significant to the surface inspection market in either period. These decreases were primarily due to delays in revenue recognition related to a new software release that occurred

21

late in 2013. Surface inspection revenue reported each quarter can vary significantly depending upon the timing of customer orders, system deliveries, and installations, as well as the impact of revenue deferrals. Management expects surface inspection revenue to grow in the second quarter of 2014 as compared to the first quarter.

Product Revenue

Product revenue increased by $8,897,000, or 12%, from the first quarter of 2013. This increase was driven by a higher volume of MVSD systems sold than in the prior year.

Service Revenue

Service revenue, which is derived from the sale of maintenance and support, training, consulting, and installation services, increased by $1,140,000, or 18%, from the first quarter of 2013. This increase was primarily due to higher revenue from MVSD consulting services, partially offset by lower revenue from installation services at SISD. Service revenue as a percentage of total revenue was 8% in the first quarters of both 2014 and 2013.

Gross Margin

Gross margin as a percentage of revenue was 77% for the first quarter of 2014 compared to 76% for the first quarter of 2013 due to a higher percentage of total revenue from the sale of MVSD products, which have relatively higher margins than the sale of SISD products and the sale of services.

MVSD Margin

MVSD gross margin as a percentage of revenue was 80% for the first quarter of 2014 compared to 79% for the first quarter of 2013 due to the favorable impact of higher sales volume.

SISD Margin

SISD gross margin as a percentage of revenue was 52% for the first quarter of 2014 compared to 54% for the first quarter of 2013 due to lower installation service margins.

Product Margin

Product gross margin as a percentage of revenue was 79% for the first quarter of 2014 compared to 78% for the first quarter of 2013 due to a favorable shift in revenue mix to relatively higher-margin MVSD products.

Service Margin

Service gross margin as a percentage of revenue was 48% for the first quarter of 2014 compared to 52% for the first quarter of 2013 due to lower installation service margins at SISD.

Research, Development, and Engineering Expenses

Research, development, and engineering (RD&E) expenses for the first quarter of 2014 increased by $1,181,000, or 10%, from the first quarter of 2013. MVSD RD&E expenses increased by $1,116,000, or 11%, and SISD RD&E expenses increased by $65,000, or 7%.

The increase in MVSD RD&E expenses was primarily due to headcount additions, resulting in higher personnel costs, such as salaries and fringe benefits ($516,000), as well as higher spending on materials for engineering prototypes ($290,000) and increased stock-based compensation expense due to a higher valuation of stock options granted in the first quarter of 2014 ($213,000). The increase in SISD RD&E expenses was primarily due to higher spending on outsourced engineering services ($58,000).

RD&E expenses as a percentage of revenue were 14% in the first quarters of both 2014 and 2013. We believe that a continued commitment to RD&E activities is essential in order to maintain or achieve product leadership with our existing products and to provide innovative new product offerings. In addition, we consider our ability to accelerate time to market for new products to be critical to our revenue growth. Therefore, we expect to continue to make significant RD&E investments in the future. Although we target our RD&E spending to be between 10% and 15% of revenue, this percentage is impacted by revenue levels.

Selling, General, and Administrative Expenses

Selling, general, and administrative (SG&A) expenses for the first quarter of 2014 increased by $2,733,000, or 8%, from the first quarter of 2013. MVSD SG&A expenses increased by $2,081,000, or 8%, while SISD SG&A expenses increased by $152,000, or 5%. Corporate expenses that are not allocated to either division increased by $500,000, or 14%.

22

The table below details the $2,081,000 net increase in MVSD SG&A in 2014 (in thousands):

MVSD SG&A expenses in 2013	$	25,490
Personnel costs	2,124
Sales commissions	598
Sales demonstration equipment	(377		)
Other	(264		)
MVSD SG&A expenses in 2014	$	27,571

Personnel costs have increased from the prior year due to additional headcount, and to a lesser extent, higher average costs per employee. Over the past year, the Company has continued to increase headcount in selective areas, principally Sales, resulting in higher personnel costs, such as salaries, fringe benefits, commissions, and travel expenses. Average costs per employee have increased over the prior year due primarily to modest wage increases granted early in 2014 and higher fringe benefits, such as health care costs and foreign retirement obligations. The Company also recorded higher expense related to sales commissions resulting from higher business levels. These increases were partially offset by lower expenses related to sales demonstration equipment. Foreign currency exchange rate changes had little impact on total SG&A expenses, as the positive impact on expenses of a weaker Japanese Yen in 2014 was offset by the negative impact of a stronger Euro in 2014.

The increase in SISD SG&A expenses was principally due to higher expense related to sales commissions ($125,000). Sales commissions at SISD are earned at different milestones, including cash receipt.

The increase in corporate expenses was primarily related to higher legal fees related to patent-infringement actions ($347,000) and higher stock-based compensation expense ($171,000).

Nonoperating Income (Expense)

The Company recorded a foreign currency loss of $110,000 in the first quarter of 2014 compared to a gain of $63,000 in the first quarter of 2013. The foreign currency gains and losses in each period resulted primarily from the revaluation and settlement of accounts receivable, accounts payable, and intercompany balances that are reported in one currency and collected in another. Although a portion of the Company’s foreign currency exposure is mitigated through the use of forward contracts, this program depends upon forecasts of sales and collections, and therefore, gains or losses on the underlying receivables may not perfectly offset losses or gains on the contracts.

Investment income for the first quarter of 2014 increased by $395,000, or 101%, from the first quarter of 2013. In the first quarter of 2013, the Company recorded an unrealized loss of $368,000 related to a corporate stock holding designated as a trading security, which was liquidated in late 2013.

The Company recorded other expense of $273,000 in the first quarter of 2014 compared to other income of $117,000 in the first quarter of 2013. Other income (expense) primarily includes rental income, net of associated expenses, from leasing buildings adjacent to the Company’s corporate headquarters. In the first quarter of 2013, the Company recorded $354,000 of other income due to the expiration of the statutes of limitations relating to tax holidays, during which time the Company collected value-added taxes from customers that were not required to be remitted to the government authority.

Income Tax Expense

The Company’s effective tax rate was 19% in the first quarter of 2014 compared to 16% in the first quarter of 2013. The effective tax rate for the first quarter of 2013 was impacted by one discrete event related to the retroactive application of the 2012 R&D credit passed by Congress under the American Taxpayer Relief Act of 2012, which reduced tax expense by $555,000. Excluding this discrete event, the effective tax rate for the first quarter of 2013 was 19%. There were no discrete events in the first quarter of 2014.

Liquidity and Capital Resources

The Company has historically been able to generate positive cash flow from operations, which has funded its operating activities and other cash requirements and has resulted in an accumulated cash, cash equivalent, and investment balance of $464,156,000 as of March 30, 2014. The Company has established guidelines relative to credit ratings, diversification, and maturities of its investments that maintain liquidity.

The Company’s cash requirements during the first quarter of 2014 were met with its existing cash balances, cash from investment maturities, positive cash flows from operations, and the proceeds from stock option exercises. Cash requirements primarily consisted of operating activities, purchases of investments, the Company’s stock repurchase program, and capital expenditures. Capital expenditures for the first quarter of 2014 totaled $2,685,000 and consisted

23

primarily of expenditures for building improvements at the Company’s headquarters and adjacent buildings in Natick, Massachusetts, as well as computer hardware.

The Company is a Limited Partner in Venrock Associates III, L.P. (Venrock), a venture capital fund. The Company has committed to a total investment in the limited partnership of up to $20,500,000, with the commitment period expiring on December 31, 2015. The Company does not have the right to withdraw from the partnership prior to this date. As of March 30, 2014, the Company had contributed $19,886,000 to the partnership. The remaining commitment of $614,000 can be called by Venrock at any time before December 31, 2015. Distributions and contributions are at the discretion of Venrock’s management. No contributions were made and no distributions were received in the first quarter of 2014.

In December 2012, the Company declared and paid a $0.055 dividend that would typically have been declared in the first quarter of 2013 in conjunction with the 2012 earnings release. A special dividend of $0.50 was also declared and paid in the fourth quarter of 2012 to replace expected quarterly dividend declarations for the next eight quarters, beginning in 2013. The additional $0.055 dividend and the $0.50 dividend were accelerated due to the anticipated increase in the federal tax on dividends paid after December 31, 2012. Due to these accelerated payments, no cash dividends were declared or paid during the first quarter of 2014. Future dividends will be declared at the discretion of the Company’s Board of Directors and will depend upon such factors as the Board deems relevant including, among other things, the Company’s ability to generate positive cash flows from operations.

In April 2008, the Company’s Board of Directors authorized the repurchase of up to $50,000,000 of the Company’s common stock, primarily as a means to reduce the dilutive effect of employee stock options. Stock repurchases under this program were completed in 2013. In November 2011, the Company’s Board of Directors authorized the repurchase of up to $80,000,000 of the Company’s common stock to help reduce the dilutive effect of employee stock options. Purchases under this 2011 program began in 2013 upon completion of the 2008 program. As of March 30, 2014, the Company repurchased a total of 1,272,000 shares at a cost of $42,195,000, including 380,000 shares at a cost of $14,287,000 in the first quarter of 2014. On April 29, 2014, the Company's Board of Directors authorized the repurchase of an additional $50,000,000 of the Company's stock. This new authorization will commence once the Company completes the November 2011 program. The Company may repurchase shares under this program in future periods depending upon a variety of factors, including, among other things, the impact of dilution from employee stock options, stock price, share availability, and cash requirements.

The Company believes that its existing cash, cash equivalent, and investment balances, together with cash flow from operations, will be sufficient to meet its operating, investing, and financing activities for the next twelve months. As of March 30, 2014, the Company had approximately $462,200,000 in cash, cash equivalents, and debt securities that could be converted into cash. In addition, the Company has no debt and does not anticipate needing debt financing in the near future. We believe that our strong cash position has put us in a relatively good position with respect to our longer-term liquidity needs.

ITEM 3: QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

There have been no material changes to the Company’s exposures to market risk since December 31, 2013.

ITEM 4: CONTROLS AND PROCEDURES

As required by Rules 13a-15 and 15d-15 of the Securities Exchange Act of 1934, the Company has evaluated, with the participation of management, including the Chief Executive Officer and the Chief Financial Officer, the effectiveness of its disclosure controls and procedures (as defined in such rules) as of the end of the period covered by this report. Based on such evaluation, the Chief Executive Officer and Chief Financial Officer concluded that such disclosure controls and procedures were effective as of that date. From time to time, the Company reviews its disclosure controls and procedures, and may from time to time make changes aimed at enhancing their effectiveness and to ensure that the Company’s systems evolve with its business. There was no change in the Company’s internal control over financial reporting that occurred during the quarter ended March 30, 2014 that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over financial reporting.

24

PART II: OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

In May 2008, the Company filed a complaint against MvTec Software GmbH, MvTec LLC, and Fuji America Corporation in the United States District Court for the District of Massachusetts alleging infringement of certain patents owned by the Company. This matter is ongoing.

In May 2009, the Company pre-filed a complaint with the United States International Trade Commission (ITC) pursuant to Section 337 of the Tariff Act of 1930, as amended, 19 U.S.C. §1337, against MvTec Software GmbH, MvTec LLC, Fuji America, and several other respondents alleging unfair methods of competition and unfair acts in the unlawful importation into the United States, sale for importation, or sale within the United States after importation. By this filing, the Company requested the ITC to investigate the Company’s contention that certain machine vision software, machine vision systems, and products containing the same infringe, and respondents directly infringe and/or actively induce and/or contribute to the infringement in the United States, of one or more of the Company’s U.S. patents. In July 2009, the ITC issued an order that it would institute an investigation based upon the Company’s assertions. In September 2009, the Company reached a settlement with two of the respondents, and in December 2009, the Company reached a settlement with five additional respondents. In March 2010, the Company reached a settlement with respondent Fuji Machine Manufacturing Co., Ltd. and its subsidiary Fuji America Corporation. These settlements did not have a material impact on the Company’s financial results. An ITC hearing was held in May 2010. In July 2010, the Administrative Law Judge issued an initial determination finding two of the Company’s patents invalid and that respondents did not infringe the patents-at-issue. In September 2010, the ITC issued a notice that it would review the initial determination of the Administrative Law Judge. The ITC issued its Final Determination in November 2010 in which it determined to modify-in-part and affirm-in-part the Administrative Law Judge’s determination, and terminate the investigation with a finding of no violation of Section 337 of the Tariff Act of 1930 (as amended 19 U.S.C. §1337). The Company has filed an appeal of the decision with the United States Court of Appeals for the Federal Circuit. An oral hearing before the United States Court of Appeals occurred in February 2012. In December 2013, the Federal Circuit affirmed the ITC’s finding of non-infringement, but did not address the ITC’s finding regarding validity.

In March 2013, the Company filed a lawsuit against Microscan Systems, Inc. (“Microscan”) and Code Corporation in the United States District Court for the Southern District of New York alleging that Microscan’s Mobile Hawk handheld imager infringes U.S. Patent 7,874,487 owned by the Company. The lawsuit seeks to prohibit Code Corporation from manufacturing the product, and Microscan from selling and distributing the product. The Company is also seeking monetary damages resulting from the alleged infringement. Both parties have filed motions for summary judgment and a hearing on these motions was held in October 2013. Trial was originally scheduled for October 2013, but has been moved to April 2014. This matter is ongoing.

The Company cannot predict the outcome of the above-referenced pending matters and an adverse resolution of these lawsuits could have a material adverse effect on the Company’s financial position, liquidity, results of operations, and/or indemnification obligations. In addition, various other claims and legal proceedings generally incidental to the normal course of business are pending or threatened on behalf of or against the Company. While we cannot predict the outcome of these incidental matters, we believe that any liability arising from them will not have a material adverse effect on our financial position, liquidity, or results of operations.

ITEM 1A. RISK FACTORS

For a complete list of factors that could affect the Company’s business, results of operations, and financial condition, see the risk factors discussion provided in Part I—Item 1A of the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2013.

25

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

The following table sets forth information with respect to purchases by the Company of shares of its Common Stock during the periods indicated.

	Total Number of Shares Purchased	Average Price Paid per Share	Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs (1)	Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plans or Programs
January 1—January 26, 2014	—	—	—	$	52,092,000
January 27—February 23, 2014	20,000	38.07	20,000	$	51,331,000
February 24—March 30, 2014	360,000	37.57	360,000	$	37,805,000
Total	380,000	37.60	380,000	$	37,805,000

(1) In April 2008, the Company’s Board of Directors authorized the repurchase of up to $50,000,000 of the Company’s common stock. Stock repurchases under this program were completed in 2013. In November 2011, the Company’s Board of Directors authorized the repurchase of up to an additional $80,000,000 of the Company’s common stock which commenced once the Company completed the $50,000,000 program noted above. On April 29, 2014, the Company's Board of Directors authorized the repurchase of an additional $50,000,000 of the Company's stock, resulting in a total repurchase authority of $87,805,000 as of the date of this report.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

None

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

ITEM 5. OTHER INFORMATION

None.

26

ITEM 6. EXHIBITS

Exhibit Number
31.1	Certification of Chief Executive Officer pursuant to Rule 13a-14(a)/15d-14(a) under the Securities Exchange Act of 1934*
31.2	Certification of Chief Financial Officer pursuant to Rule 13a-14(a)/15d-14(a) under the Securities Exchange Act of 1934*
32.1	Certification of Chief Executive Officer pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002**
32.2	Certification of Chief Financial Officer pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002**
101	xBRL (Extensible Business Reporting Language)
	The following materials from Cognex Corporation’s Quarterly Report on Form 10-Q for the period ended March 30, 2014, formatted in xBRL: (i) Consolidated Statements of Operations for the three-month periods ended March 30, 2014 and March 31, 2013; (ii) Consolidated Statements of Comprehensive Income for the three-month periods ended March 30, 2014 and March 31, 2013; (iii) Consolidated Balance Sheets as of March 30, 2014 and December 31, 2013; (iv) Consolidated Condensed Statements of Cash Flows for the three-month periods ended March 30, 2014 and March 31, 2013; (v) Consolidated Statement of Shareholders’ Equity for the three-month period ended March 30, 2014; and (vi) Notes to Consolidated Financial Statements.
*	Filed herewith
**	Furnished herewith

27

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Date:	April 30, 2014	COGNEX CORPORATION
		By:	/s/ Robert J. Willett
			Robert J. Willett
			President and Chief Executive Officer
			(principal executive officer)
		By:	/s/ Richard A. Morin
			Richard A. Morin
			Executive Vice President of Finance and Administration
			and Chief Financial Officer
			(principal financial and accounting officer)

28

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Robert J. Willett, certify that:

1 I have reviewed this quarterly report on Form 10-Q of Cognex Corporation;

2 Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3 Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4 The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5 The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	April 30, 2014	By:	/s/ Robert J. Willett
			Robert J. Willett
			President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Richard A. Morin, certify that:

1 I have reviewed this quarterly report on Form 10-Q of Cognex Corporation;

2 Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3 Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4 The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5 The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	April 30, 2014	By:	/s/ Richard A. Morin
			Richard A. Morin
			Executive Vice President of Finance and Administration
			and Chief Financial Officer

EX-32.1

Exhibit 32.1*

CERTIFICATION PURSUANT TO

18 U.S.C. 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned officer of Cognex Corporation (the “Company”) hereby certifies that the Company’s quarterly report on Form 10-Q for the quarterly period ended March 30, 2014 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934, as amended, and that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	April 30, 2014	By:	/s/ Robert J. Willett
			Robert J. Willett
			President and Chief Executive Officer
			(principal executive officer)

* This certification shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liability of that section, nor shall it be deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934.

EX-32.2

Exhibit 32.2*

CERTIFICATION PURSUANT TO

18 U.S.C. 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned officer of Cognex Corporation (the “Company”) hereby certifies that the Company’s quarterly report on Form 10-Q for the quarterly period ended March 30, 2014 (the “Report”), as filed with the Securities and Exchange Commission on the date hereof, fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934, as amended, and that the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	April 30, 2014	By:	/s/ Richard A. Morin
			Richard A. Morin
			Executive Vice President of Finance and Administration
			and Chief Financial Officer
			(principal financial officer)

* This certification shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liability of that section, nor shall it be deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934.

XML

Cash, Cash Equivalents, and Investments - Summary of Available-for-Sale Investments (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2014
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 419,076
Gross Unrealized Gains	981
Gross Unrealized Losses	(320)
Fair Value	419,737
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses	(98)
Corporate Bonds | Short-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	33,480
Gross Unrealized Gains	105
Gross Unrealized Losses	0
Fair Value	33,585
Corporate Bonds | Long-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	190,185
Gross Unrealized Gains	680
Gross Unrealized Losses	(98)
Fair Value	190,767
Asset-Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses	(65)
Asset-Backed Securities | Short-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	410
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Fair Value	410
Asset-Backed Securities | Long-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	74,471
Gross Unrealized Gains	69
Gross Unrealized Losses	(65)
Fair Value	74,475
Municipal Bonds | Short-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	4,758
Gross Unrealized Gains	8
Gross Unrealized Losses	0
Fair Value	4,766
Municipal Bonds | Long-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	6,968
Gross Unrealized Gains	45
Gross Unrealized Losses	0
Fair Value	7,013
Treasury Bills
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses	(139)
Treasury Bills | Long-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	86,941
Gross Unrealized Gains	2
Gross Unrealized Losses	(139)
Fair Value	86,804
Sovereign Bonds
Schedule of Available-for-sale Securities [Line Items]
Gross Unrealized Losses	(18)
Sovereign Bonds | Short-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,996
Gross Unrealized Gains	20
Gross Unrealized Losses	0
Fair Value	3,016
Sovereign Bonds | Long-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	17,367
Gross Unrealized Gains	52
Gross Unrealized Losses	(18)
Fair Value	17,401
Agency Bonds | Long-Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,500
Gross Unrealized Gains	0
Gross Unrealized Losses	0
Fair Value	$ 1,500

XML

Stock-Based Compensation Expense - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 30, 2014 group	Mar. 31, 2013	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	0.00%	0.00%
Weighted-average grant-date fair values of stock options granted, in dollars per share	$ 15.34	$ 8.07
Number of groups within the employee population	2
Percentage of stock options granted to senior management expected to vest	72.00%
Percentage of stock options granted to all other employees expected to vest	70.00%
Estimated forfeiture rate for unvested options for senior management	11.00%
Estimated forfeiture rate for unvested options for all non-senior management	12.00%
Reduction in compensation expense due to revised estimated forfeiture rates	$ 288,000	$ 300,000
Stock-based compensation expense	4,004,000	3,298,000
Income tax benefit recognized related to stock-based compensation expense	1,306,000	1,094,000
Compensation expense was capitalized	0		0
Total intrinsic values of stock options exercised	8,933,000	7,193,000
Total fair values of stock options vest	8,361,000	6,932,000
Share-based compensation expense not yet recognized	$ 19,791,000
Share-based compensation expense not yet recognized, period for recognition	1 year 7 months 6 days
General Stock Option Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period for stock option plans	4 years
Stock Option and Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period for stock option plans	4 years
Expiration period of stock option plan	10 years
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant under stock option plans	10,024,230
Expiration period of stock option plan	10 years
2015 Through Expected Life of Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	0.56%

XML

Derivative Instruments - Additional Information (Detail)	3 Months Ended
	Mar. 30, 2014
Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Maximum Remaining Maturity of Foreign Currency Derivatives	45 days
Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Maximum Length of Time Hedged in Cash Flow Hedge	18 months

XML

Stock-Based Compensation Expense - Summary of Stock Option Activity (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Outstanding, Shares	6,138
Granted, Shares	1,206
Exercised, Shares	(396)
Forfeited or expired, Shares	(73)
Outstanding, Shares	6,875
Exercisable, Shares	2,481
Options vested or expected to vest, Shares	6,130	[1]
Outstanding, Weighted-Average Exercise Price, in dollars per share	$ 15.65
Granted, Weighted-Average Exercise Price, in dollars per share	$ 39.31
Exercised, Weighted-Average Exercise Price, in dollars per share	$ 15.02
Forfeited or expired, Weighted-Average Exercise Price, in dollars per share	$ 18.02
Outstanding, Weighted-Average Exercise Price, in dollars per share	$ 19.80
Exercisable, Weighted-Average Exercise Price, in dollars per share	$ 13.59
Options vested or expected to vest, Weighted-Average Exercise Price, in dollars per share	$ 18.93	[1]
Outstanding, Weighted-Average Remaining Contractual Term	7 years 5 months 6 days
Exercisable, Weighted-Average Remaining Contractual Term	5 years 9 months 24 days
Options vested or expected to vest, Weighted-Average Remaining Contractual Term	7 years 2 months 2 days	[1]
Outstanding, Aggregate Intrinsic Value	$ 98,435
Exercisable, Aggregate Intrinsic Value	48,212
Options vested or expected to vest, Aggregate Intrinsic Value	$ 92,123	[1]

[1] In addition to the vested options, the Company expects a portion of the unvested options to vest at some point in the future. Options expected to vest are calculated by applying an estimated forfeiture rate to the unvested options.

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Guarantees - Additional Information (Detail)	3 Months Ended
	Mar. 30, 2014 Category
Guarantees [Abstract]
Number of categories of letters of credit	3

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Taxes (Tables)

3 Months Ended

Mar. 30, 2014

Income Tax Disclosure [Abstract]

Reconciliation of United States Federal Statutory Corporate Tax Rate to Company's Effective Tax Rate, or Income Tax Provision

A reconciliation of the United States federal statutory corporate tax rate to the Company’s effective tax rate, or income tax provision, was as follows:

	Three-months Ended
	March 30, 2014		March 31, 2013
Income tax provision at federal statutory rate	35	%	35	%
State income taxes, net of federal benefit	1	%	2	%
Foreign tax rate differential	(17	)%	(17	)%
Tax credit	—	%	(1	)%
Discrete tax events	—	%	(3	)%
Income tax provision	19	%	16	%

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Stock-Based Compensation Expense - Stock-Based Compensation Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 4,004	$ 3,298
Product cost of revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	285	227
Service cost of revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	63	63
Research, development, and engineering
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	1,056	813
Selling, general, and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 2,600	$ 2,195

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Segment Information

3 Months Ended

Mar. 30, 2014

Segment Reporting [Abstract]

Segment Information

The Company has two reportable segments: the Modular Vision Systems Division (MVSD) and the Surface Inspection Systems Division (SISD). MVSD develops, manufactures, and markets modular vision systems that are used to control the manufacture of discrete items by locating, identifying, inspecting, and measuring them during the manufacturing process. SISD develops, manufactures, and markets surface inspection vision systems that are used to inspect surfaces of materials processed in a continuous fashion, such as metals, paper, nonwoven, plastics, and glass, to ensure there are no flaws or defects on the surfaces. Segments are determined based upon the way that management organizes its business for making operating decisions and assessing performance. The Company evaluates segment performance based upon income or loss from operations, excluding stock-based compensation expense.

The following table summarizes information about the segments (in thousands):

Three-months Ended    March 30, 2014	MVSD		SISD		Reconciling Items			Consolidated
Product revenue	$	77,618	$	5,951	$	—		$	83,569
Service revenue	3,698		3,662		—			7,360
Operating income	28,292		1,013		(6,862		)	22,443

Three-months Ended    March 31, 2013	MVSD		SISD		Reconciling Items			Consolidated
Product revenue	$	68,319	$	6,353	$	—		$	74,672
Service revenue	2,092		4,128		—			$	6,220
Operating income	22,076		1,732		(5,827		)	$	17,981

Reconciling items consist of stock-based compensation expense and unallocated corporate expenses, which primarily include corporate headquarters costs, professional fees, and patent infringement litigation. Additional asset information by segment is not produced internally for use by the chief operating decision maker, and therefore, is not presented. Additional asset information is not provided because cash and investments are commingled and the segments share assets and resources in a number of locations around the world.

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Derivative Instruments - Information Regarding Fair Value of Forward Contracts Outstanding (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2014	Dec. 31, 2013
Derivatives, Fair Value [Line Items]
Derivative Asset	$ 33	$ 210
Derivative Liability	112	122
Designated as Hedging Instrument | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative Asset	33	204
Designated as Hedging Instrument | Accrued Expenses
Derivatives, Fair Value [Line Items]
Derivative Liability	112	98
Not Designated as Hedging Instrument | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative Asset	0	6
Not Designated as Hedging Instrument | Accrued Expenses
Derivatives, Fair Value [Line Items]
Derivative Liability	$ 0	$ 24

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Cash, Cash Equivalents, and Investments - Effective Maturity Dates of Available-for-Sale Investments (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2014
Schedule of Available-for-sale Securities [Line Items]
1 Year or Less	$ 41,777
1-2 Years	118,522
2-3 Years	171,448
3-4 Years	33,381
4-5 Years	50,723
5-8 Years	3,886
Fair Value	419,737
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
1 Year or Less	33,585
1-2 Years	64,435
2-3 Years	94,424
3-4 Years	2,428
4-5 Years	29,480
5-8 Years	0
Fair Value	224,352
Treasury Bills
Schedule of Available-for-sale Securities [Line Items]
1 Year or Less	0
1-2 Years	32,317
2-3 Years	54,487
3-4 Years	0
4-5 Years	0
5-8 Years	0
Fair Value	86,804
Asset-Backed Securities
Schedule of Available-for-sale Securities [Line Items]
1 Year or Less	410
1-2 Years	5,287
2-3 Years	14,663
3-4 Years	29,396
4-5 Years	21,243
5-8 Years	3,886
Fair Value	74,885
Sovereign Bonds
Schedule of Available-for-sale Securities [Line Items]
1 Year or Less	3,016
1-2 Years	12,502
2-3 Years	4,899
3-4 Years	0
4-5 Years	0
5-8 Years	0
Fair Value	20,417
Municipal Bonds
Schedule of Available-for-sale Securities [Line Items]
1 Year or Less	4,766
1-2 Years	3,981
2-3 Years	1,475
3-4 Years	1,557
4-5 Years	0
5-8 Years	0
Fair Value	11,779
Agency Bonds
Schedule of Available-for-sale Securities [Line Items]
1 Year or Less	0
1-2 Years	0
2-3 Years	1,500
3-4 Years	0
4-5 Years	0
5-8 Years	0
Fair Value	$ 1,500

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Fair Value Measurements - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 30, 2014
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other-than-temporary impairment loss	$ 0
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other-than-temporary impairment loss	0
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other-than-temporary impairment loss	$ 0

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Derivative Instruments - Information Regarding Effect of Forward Contracts, Net of Underlying Exposure, on Consolidated Statements of Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Total gains (losses) reclassified from accumulated other comprehensive income (loss) into net income	$ (33)	$ 0
Designated as Hedging Instrument | Accumulated other comprehensive income (loss), net of tax
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) in Shareholders' equity on derivatives (effective portion)	(62)	0
Designated as Hedging Instrument | Product revenue
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) reclassified from accumulated other comprehensive income (loss) into net income (effective portion)	13	0
Designated as Hedging Instrument | Research, development, and engineering expenses
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) reclassified from accumulated other comprehensive income (loss) into net income (effective portion)	(30)	0
Designated as Hedging Instrument | Selling, general, and administrative expenses
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) reclassified from accumulated other comprehensive income (loss) into net income (effective portion)	(16)	0
Designated as Hedging Instrument | Foreign currency gain (loss)
Information regarding the effect of the forward contracts, net of the underlying exposure, on the Consolidated Statements of Operations
Gains (losses) recognized in net income on derivatives (ineffective portion and discontinued derivatives)	0	0
Not Designated as Hedging Instrument | Foreign currency gain (loss)
Information regarding the effect of the forward contracts, net of the underlying exposure, on the Consolidated Statements of Operations
Gains (losses) recognized in net income	$ (152)	$ 203

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Weighted-Average Shares - Additional Information (Detail)	1 Months Ended	3 Months Ended
	Jul. 29, 2013	Mar. 30, 2014	Sep. 29, 2013	Mar. 31, 2013
Earnings Per Share [Abstract]
Stock split conversion ratio	2		2
Stock options to purchase anti-dilutive common stock		585,208		965,938

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Guarantees - Details of Letters of Credit Outstanding (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014
Guarantor Obligations [Line Items]
Guarantee Amount	$ 1,747
Warranty Bonds
Guarantor Obligations [Line Items]
Guarantee Amount	976
Guarantee due date	Various from April 2014 to June 2016
Performance Bonds
Guarantor Obligations [Line Items]
Guarantee Amount	398
Guarantee due date	Various from June 2014 to July 2016
Bank Guarantees
Guarantor Obligations [Line Items]
Guarantee Amount	$ 373
Guarantee due date	Various from April 2014 to July 2014

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Consolidated Statement of Shareholders' Equity (USD $) In Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning Balance at Dec. 31, 2013	$ 643,912	$ 174	$ 211,440	$ 462,131	$ (29,833)
Beginning Balance, Shares at Dec. 31, 2013	86,831	86,831
Issuance of common stock under stock option plans	5,951	0	5,951
Issuance of common stock under stock option plans, shares	396	389
Repurchase of common stock	(14,287)	0		(14,287)
Repurchase of common stock, shares		(380)
Stock-based compensation expense	4,004		4,004
Excess tax benefit from stock option exercises	2,165		2,165
Net income	18,506			18,506
Net unrealized loss on cash flow hedges, net of tax of $16	(199)				(199)
Reclassification adjustments for loss (gain) included in net income	33				33
Net unrealized gain on available-for-sale investments, net of tax of $113	1,019				1,019
Reclassification of net realized gain on the sale of available-for-sale investments	(501)				(501)
Foreign currency translation adjustment, net of tax of $7	445				445
Ending Balance at Mar. 30, 2014	$ 661,048	$ 174	$ 223,560	$ 466,350	$ (29,036)
Ending Balance, Shares at Mar. 30, 2014	86,840	86,840

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Weighted-Average Shares - Calculation of Weighted-Average Shares (Detail) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Earnings Per Share [Abstract]
Basic weighted-average common shares outstanding	86,879	86,522	[1]
Effect of dilutive stock options	2,380	1,738
Weighted-average common and common-equivalent shares outstanding	89,259	88,260	[1]

[1] Prior period results have been adjusted to reflect the two-for-one stock split effected in the form of a stock dividend which occurred in the third quarter of 2013.

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Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2014	Dec. 31, 2013
Inventory Disclosure [Abstract]
Raw materials	$ 12,958	$ 13,101
Work-in-process	7,521	4,472
Finished goods	7,955	8,121
Inventories	$ 28,434	$ 25,694

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Warranty Obligations (Tables)

3 Months Ended

Mar. 30, 2014

Guarantees [Abstract]

Changes in Warranty Obligations

The changes in the warranty obligations were as follows (in thousands):

Balance as of December 31, 2013	$	3,016
Provisions for warranties issued during the period	759
Fulfillment of warranty obligations	(524		)
Foreign exchange rate changes	8
Balance as of March 30, 2014	$	3,259

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Inventories (Tables)

3 Months Ended

Mar. 30, 2014

Inventory Disclosure [Abstract]

Inventories

Inventories consisted of the following (in thousands):

	March 30, 2014		December 31, 2013
Raw materials	$	12,958	$	13,101
Work-in-process	7,521		4,472
Finished goods	7,955		8,121
	$	28,434	$	25,694

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Stock-Based Compensation Expense - Weighted-Average Assumptions Used in Estimating Fair Values of Stock Options Granted (Detail)	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Risk-free rate	2.70%	2.10%
Expected dividend yield	0.00%	0.00%
Expected volatility	41.00%	42.00%
Expected term (in years)	5 years 5 months 6 days	5 years 10 months 12 days

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Warranty Obligations - Changes in Warranty Obligations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014
Payables and Accruals [Abstract]
Beginning Balance	$ 3,016
Provisions for warranties issued during the period	759
Fulfillment of warranty obligations	(524)
Foreign exchange rate changes	8
Ending Balance	$ 3,259

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Guarantees (Tables)

3 Months Ended

Mar. 30, 2014

Guarantees [Abstract]

Details of Letters of Credit Outstanding

The following table details the letters of credit outstanding as of March 30, 2014:

Type	Guarantee Amount (in thousands)		Guarantee Due Date
Warranty bonds	$	976	Various from April 2014 to June 2016
Performance bonds	398		Various from June 2014 to July 2016
Bank guarantees	373		Various from April 2014 to July 2014
	$	1,747

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Derivative Instruments (Tables)

3 Months Ended

Mar. 30, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Outstanding Forward Contracts Table

The Company had the following outstanding forward contracts that were entered into to mitigate foreign currency exchange rate risk (in thousands):

	As of March 30, 2014			As of December 31, 2013
Currency	Notional Value	USD Equivalent		Notional Value	USD Equivalent
Derivatives Designated as Hedging Instruments:
Japanese Yen	665,000	$	6,514	625,000	$	6,122
Hungarian Forint	639,750	2,872		570,175	2,603
Singapore Dollar	3,049	2,472		2,867	2,346
British Pound	673	1,112		613	1,010
Canadian Dollar	1,199	1,107		985	932
Derivatives Not Designated as Hedging Instruments:
Euro	—	$	—	2,828	$	3,887
Japanese Yen	—	—		294,500	2,797
British Pound	—	—		1,100	1,820
Chinese Renminbi	—	—		9,000	1,467
Taiwanese Dollar	—	—		27,000	908
Korean Won	—	—		650,000	620
Hungarian Forint	—	—		123,000	568
Brazilian Real	—	—		250	106

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value

Information regarding the fair value of the outstanding forward contracts was as follows (in thousands):

	Asset Derivatives					Liability Derivatives
	Balance	Fair Value				Balance	Fair Value
	Sheet Location	March 30, 2014		December 31, 2013		Sheet Location	March 30, 2014		December 31, 2013
Derivatives Designated as Hedging Instruments:
Cash flow hedge forward contracts	Prepaid expenses and other current assets	$	33	$	204	Accrued expenses	$	112	$	98
Derivatives Not Designated as Hedging Instruments:
Economic hedge forward contracts	Prepaid expenses and other current assets	$	—	$	6	Accrued expenses	$	—	$	24

Offsetting Assets

The table below details the gross activity for all derivative assets and liabilities which were presented on a net basis on the Consolidated Balance Sheets due to the right of offset with one counterparty (in thousands):

Asset Derivatives						Liability Derivatives
	March 30, 2014			December 31, 2013			March 30, 2014			December 31, 2013
Gross amounts of recognized assets	$	38		$	210	Gross amounts of recognized liabilities	$	128		$	122
Gross amounts offset	(5		)	—		Gross amounts offset	(16		)	—
Net amount of assets presented	33			210		Net amount of liabilities presented	112			122

Derivative Instruments, Gain (Loss)

Information regarding the effect of derivative instruments, net of the underlying exposure, on the consolidated financial statements was as follows (in thousands):

	Location in Financial Statements	Three-months Ended
		March 30, 2014			March 31, 2013
Derivatives Designated as Hedging Instruments:
Gains (losses) in Shareholders' equity on derivatives (effective portion)	Accumulated other comprehensive income (loss), net of tax	$	(62	)	$	—
Gains (losses) reclassified from accumulated other comprehensive income (loss) into net income (effective portion)	Product revenue	$	13		$	—
	Research, development, and engineering expenses	(30		)	—
	Selling, general, and administrative expenses	(16		)	—
	Total gains (losses) reclassified from accumulated other comprehensive income (loss) into net income	$	(33	)	$	—
Gains (losses) recognized in net income on derivatives (ineffective portion and discontinued derivatives)	Foreign currency gain (loss)	$	—		$	—
Derivatives Not Designated as Hedging Instruments:
Gains (losses) recognized in net income	Foreign currency gain (loss)	$	(152	)	$	203

Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss)

The following table provides the changes in accumulated other comprehensive income (loss), net of tax, related to derivative instruments (in thousands):

	Three-months ended
	March 30, 2014			March 31, 2013
Beginning balance	$	104		$	—
Amount of loss (gain) reclassified to net income	33			—
Change in fair value of derivative instruments	(199		)	—
Ending balance	$	(62	)	$	—

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Consolidated Condensed Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net income	$ 18,506	$ 15,583
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	4,004	3,298
Depreciation of property, plant, and equipment	1,990	1,828
Amortization of intangible assets	916	961
Amortization of discounts or premiums on investments	896	758
Realized gain on sale of investments	(501)	(31)
Tax effect of stock option exercises	(2,165)	(1,376)
Change in deferred income taxes	127	(1,371)
Change in operating assets and liabilities	(6,312)	(860)
Net cash provided by operating activities	17,461	18,790
Cash flows from investing activities:
Purchases of investments	(124,734)	(76,694)
Maturities and sales of investments	117,753	48,248
Purchases of property, plant, and equipment	(2,685)	(1,908)
Net cash used in investing activities	(9,666)	(30,354)
Cash flows from financing activities:
Issuance of common stock under stock option plans	5,951	9,168
Repurchase of common stock	(14,287)	0
Tax effect of stock option exercises	2,165	1,376
Net cash provided by (used in) financing activities	(6,171)	10,544
Effect of foreign exchange rate changes on cash and cash equivalents	195	(1,383)
Net change in cash and cash equivalents	1,819	(2,403)
Cash and cash equivalents at beginning of period	40,644	45,160
Cash and cash equivalents at end of period	$ 42,463	$ 42,757

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Stock-Based Compensation Expense (Tables)

3 Months Ended

Mar. 30, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Stock Option Activity

The following table summarizes the Company’s stock option activity for the three-month period ended March 30, 2014:

	Shares (in thousands)		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding as of December 31, 2013	6,138		$	15.65
Granted	1,206		39.31
Exercised	(396	)	15.02
Forfeited or expired	(73	)	18.02
Outstanding as of March 30, 2014	6,875		$	19.80	7.4	$	98,435
Exercisable as of March 30, 2014	2,481		$	13.59	5.8	$	48,212
Options vested or expected to vest at   March 30, 2014 (1)	6,130		$	18.93	7.2	$	92,123

 (1) In addition to the vested options, the Company expects a portion of the unvested options to vest at some point in the future. Options expected to vest are calculated by applying an estimated forfeiture rate to the unvested options.

Weighted-Average Assumptions Used in Estimating Fair Values of Stock Options Granted

The fair values of stock options granted in each period presented were estimated using the following weighted-average assumptions:

	Three-months Ended
	March 30, 2014		March 31, 2013
Risk-free rate	2.7	%	2.1	%
Expected dividend yield	—	%	—	%
Expected volatility	41	%	42	%
Expected term (in years)	5.4		5.9

Stock-Based Compensation Expense

The following table details the stock-based compensation expense by caption for each period presented on the Consolidated Statements of Operations (in thousands):

	Three-months Ended
	March 30, 2014		March 31, 2013
Product cost of revenue	$	285	$	227
Service cost of revenue	63		63
Research, development, and engineering	1,056		813
Selling, general, and administrative	2,600		2,195
	$	4,004	$	3,298

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Cash, Cash Equivalents, and Investments - Gross Unrealized Losses and Fair Values for Available-for-Sale Investments (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2014
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	$ 164,659
Unrealized Losses, Less than 12 Months	(293)
Fair Value, 12 Months or Greater	8,456
Unrealized Losses, 12 Months or Greater	(27)
Total Fair Value	173,115
Total Unrealized Losses	(320)
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	55,024
Unrealized Losses, Less than 12 Months	(98)
Fair Value, 12 Months or Greater	0
Unrealized Losses, 12 Months or Greater	0
Total Fair Value	55,024
Total Unrealized Losses	(98)
Asset-Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	23,535
Unrealized Losses, Less than 12 Months	(38)
Fair Value, 12 Months or Greater	8,456
Unrealized Losses, 12 Months or Greater	(27)
Total Fair Value	31,991
Total Unrealized Losses	(65)
Sovereign Bonds
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	3,347
Unrealized Losses, Less than 12 Months	(18)
Fair Value, 12 Months or Greater	0
Unrealized Losses, 12 Months or Greater	0
Total Fair Value	3,347
Total Unrealized Losses	(18)
Treasury Bills
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months	82,753
Unrealized Losses, Less than 12 Months	(139)
Fair Value, 12 Months or Greater	0
Unrealized Losses, 12 Months or Greater	0
Total Fair Value	82,753
Total Unrealized Losses	$ (139)

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Derivative Instruments - Effect on Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ (29,833)
Ending balance	(29,036)
Losses expected to be reclassified from OCI into Net Income, net of tax, 12 months	(66)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges
Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	104	0
Amount of loss (gain) reclassified to net income	33	0
Change in fair value of derivative instruments	(199)	0
Ending balance	$ (62)	$ 0

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Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Revenue
Product	$ 83,569	$ 74,672
Service	7,360	6,220
Total revenue	90,929	80,892
Cost of revenue
Product	17,286	16,464
Service	3,798	2,959
Total cost of revenue	21,084	19,423
Gross margin
Product	66,283	58,208
Service	3,562	3,261
Total gross margin	69,845	61,469
Research, development, and engineering expenses	12,502	11,321
Selling, general, and administrative expenses	34,900	32,167
Operating income	22,443	17,981
Foreign currency loss	(110)	63
Investment income	787	392
Other income (expense)	(273)	117
Income before income tax expense	22,847	18,553
Income tax expense	4,341	2,970
Net income	$ 18,506	$ 15,583
Earnings per weighted-average common and common-equivalent share:
Basic, in dollars per share	$ 0.21	$ 0.18	[1]
Diluted, in dollars per share	$ 0.21	$ 0.18	[1]
Weighted-average common and common-equivalent shares outstanding:
Basic, in shares	86,879	86,522	[1]
Diluted, in shares	89,259	88,260	[1]

[1] Prior period results have been adjusted to reflect the two-for-one stock split effected in the form of a stock dividend which occurred in the third quarter of 2013.

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Contingencies - Additional Information (Detail)	1 Months Ended
	Jul. 31, 2010 Patents	Dec. 31, 2009 Respondent	Sep. 30, 2009 Respondent
Leases [Abstract]
Number of respondents with whom a settlement was reached		5	2
Number of the company's patents found invalid	2

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Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 42,463	$ 40,644
Short-term investments	41,777	184,822
Accounts receivable, less reserves of $1,328 and $1,354 in 2014 and 2013, respectively	51,947	53,015
Inventories	28,434	25,694
Deferred income taxes	7,463	7,611
Prepaid expenses and other current assets	17,797	20,265
Total current assets	189,881	332,051
Long-term investments	379,916	229,655
Property, plant, and equipment, net	37,826	37,136
Deferred income taxes	12,288	12,307
Intangible assets, net	13,807	14,723
Goodwill	81,689	81,689
Other assets	2,110	2,138
Total assets	717,517	709,699
Current liabilities:
Accounts payable	9,671	9,487
Accrued expenses	26,140	34,331
Accrued income taxes	276	1,263
Deferred revenue and customer deposits	16,443	15,941
Total current liabilities	52,530	61,022
Reserve for income taxes	3,939	4,765
Commitments and contingencies (Note 7)
Shareholders' equity:
Common stock, $.002 par value – Authorized: 140,000 shares, issued and outstanding: 86,840 and 86,831 shares in 2014 and 2013, respectively	174	174
Additional paid-in capital	223,560	211,440
Retained earnings	466,350	462,131
Accumulated other comprehensive loss, net of tax	(29,036)	(29,833)
Total shareholders’ equity	661,048	643,912
Total liabilities and shareholders' equity	$ 717,517	$ 709,699

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Taxes - Reconciliation of United States Federal Statutory Corporate Tax Rate to Company's Effective Tax Rate, or Income Tax Provision (Detail)	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Income Tax Disclosure [Abstract]
Income tax provision at federal statutory rate	35.00%	35.00%
State income taxes, net of federal benefit	1.00%	2.00%
Foreign tax rate differential	(17.00%)	(17.00%)
Tax credit	0.00%	(1.00%)
Discrete tax events	0.00%	(3.00%)
Income tax provision	19.00%	16.00%

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Segment Information (Tables)

3 Months Ended

Mar. 30, 2014

Segment Reporting [Abstract]

Information About Segments

The following table summarizes information about the segments (in thousands):

Three-months Ended    March 30, 2014	MVSD		SISD		Reconciling Items			Consolidated
Product revenue	$	77,618	$	5,951	$	—		$	83,569
Service revenue	3,698		3,662		—			7,360
Operating income	28,292		1,013		(6,862		)	22,443

Three-months Ended    March 31, 2013	MVSD		SISD		Reconciling Items			Consolidated
Product revenue	$	68,319	$	6,353	$	—		$	74,672
Service revenue	2,092		4,128		—			$	6,220
Operating income	22,076		1,732		(5,827		)	$	17,981

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Stock Repurchase Program

3 Months Ended

Mar. 30, 2014

Equity [Abstract]

Stock Repurchase Program

In April 2008, the Company’s Board of Directors authorized the repurchase of up to $50,000,000 of the Company’s common stock, primarily as a means to reduce the dilutive effect of employee stock options. Stock repurchases under this program were completed in 2013. In November 2011, the Company’s Board of Directors authorized the repurchase of up to $80,000,000 of the Company’s common stock to help reduce the dilutive effect of employee stock options. Purchases under this 2011 program began in 2013 upon completion of the 2008 program. As of March 30, 2014, the Company repurchased a total of 1,272,000 shares at a cost of $42,195,000, including 380,000 shares at a cost of $14,287,000 in the first quarter of 2014. On April 29, 2014, the Company's Board of Directors authorized the repurchase of an additional $50,000,000 of the Company's stock. This new authorization will commence once the Company completes the November 2011 program. The Company may repurchase shares under this program in future periods depending upon a variety of factors, including, among other things, the impact of dilution from employee stock options, stock price, share availability, and cash requirements.

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Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2014	Dec. 31, 2013
Assets:
Money market instruments	$ 5,723	$ 520
Financial assets at fair value	419,737
Corporate Bonds
Assets:
Financial assets at fair value	224,352
Asset-Backed Securities
Assets:
Financial assets at fair value	74,885
Treasury Bills
Assets:
Financial assets at fair value	86,804
Sovereign Bonds
Assets:
Financial assets at fair value	20,417
Municipal Bonds
Assets:
Financial assets at fair value	11,779
Agency Bonds
Assets:
Financial assets at fair value	1,500
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Assets:
Money market instruments	5,723
Foreign Currency Cash Flow Hedge Asset at Fair Value
Liabilities:
Currency forward contracts
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Assets:
Money market instruments	0
Foreign Currency Cash Flow Hedge Asset at Fair Value	33
Liabilities:
Currency forward contracts	112
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Corporate Bonds
Assets:
Financial assets at fair value	224,352
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Asset-Backed Securities
Assets:
Financial assets at fair value	74,885
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Treasury Bills
Assets:
Financial assets at fair value	86,804
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Sovereign Bonds
Assets:
Financial assets at fair value	20,417
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Municipal Bonds
Assets:
Financial assets at fair value	11,779
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring | Agency Bonds
Assets:
Financial assets at fair value	$ 1,500

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Weighted-Average Shares

3 Months Ended

Mar. 30, 2014

Earnings Per Share [Abstract]

Weighted-Average Shares

In July 2013, the Company’s Board of Directors declared a two-for-one stock split of the Company’s common stock, which was effected through a stock dividend distributed on September 16, 2013. All references made to share or per share amounts in the accompanying consolidated financial statements and applicable disclosures reflect this two-for-one stock split.

Weighted-average shares were calculated as follows (in thousands):

	Three-months Ended
	March 30, 2014	March 31, 2013
Basic weighted-average common shares outstanding	86,879	86,522
Effect of dilutive stock options	2,380	1,738
Weighted-average common and common-equivalent shares outstanding	89,259	88,260

Stock options to purchase 585,208 and 965,938 shares of common stock, on a weighted-average basis, were outstanding for the quarters ended March 30, 2014 and March 31, 2013, respectively, but were not included in the calculation of dilutive net income per share because they were anti-dilutive.

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Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Mar. 30, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Reserves for accounts receivable	$ 1,328	$ 1,354
Common stock, par value	$ 0.002	$ 0.002
Common stock, shares authorized	140,000	140,000
Common stock, shares issued	86,840	86,831

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Consolidated Statements of Operations (Parenthetical)	1 Months Ended	3 Months Ended
	Jul. 29, 2013	Sep. 29, 2013
Income Statement [Abstract]
Stock split conversion ratio	2	2

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Contingencies

3 Months Ended

Mar. 30, 2014

Commitments and Contingencies Disclosure [Abstract]

Contingencies

In May 2008, the Company filed a complaint against MvTec Software GmbH, MvTec LLC, and Fuji America Corporation in the United States District Court for the District of Massachusetts alleging infringement of certain patents owned by the Company. This matter is ongoing.

In May 2009, the Company pre-filed a complaint with the United States International Trade Commission (ITC) pursuant to Section 337 of the Tariff Act of 1930, as amended, 19 U.S.C. §1337, against MvTec Software GmbH, MvTec LLC, Fuji America, and several other respondents alleging unfair methods of competition and unfair acts in the unlawful importation into the United States, sale for importation, or sale within the United States after importation. By this filing, the Company requested the ITC to investigate the Company’s contention that certain machine vision software, machine vision systems, and products containing the same infringe, and respondents directly infringe and/or actively induce and/or contribute to the infringement in the United States, of one or more of the Company’s U.S. patents. In July 2009, the ITC issued an order that it would institute an investigation based upon the Company’s assertions. In September 2009, the Company reached a settlement with two of the respondents, and in December 2009, the Company reached a settlement with five additional respondents. In March 2010, the Company reached a settlement with respondent Fuji Machine Manufacturing Co., Ltd. and its subsidiary Fuji America Corporation. These settlements did not have a material impact on the Company’s financial results. An ITC hearing was held in May 2010. In July 2010, the Administrative Law Judge issued an initial determination finding two of the Company’s patents invalid and that respondents did not infringe the patents-at-issue. In September 2010, the ITC issued a notice that it would review the initial determination of the Administrative Law Judge. The ITC issued its Final Determination in November 2010 in which it determined to modify-in-part and affirm-in-part the Administrative Law Judge’s determination, and terminate the investigation with a finding of no violation of Section 337 of the Tariff Act of 1930 (as amended 19 U.S.C. §1337). The Company has filed an appeal of the decision with the United States Court of Appeals for the Federal Circuit. An oral hearing before the United States Court of Appeals occurred in February 2012. In December 2013, the Federal Circuit affirmed the ITC’s finding of non-infringement, but did not address the ITC’s finding regarding validity.

In March 2013, the Company filed a lawsuit against Microscan Systems, Inc. (“Microscan”) and Code Corporation in the United States District Court for the Southern District of New York alleging that Microscan’s Mobile Hawk handheld imager infringes U.S. Patent 7,874,487 owned by the Company. The lawsuit seeks to prohibit Code Corporation from manufacturing the product, and Microscan from selling and distributing the product. The Company is also seeking monetary damages resulting from the alleged infringement. Both parties have filed motions for summary judgment and a hearing on these motions was held in October 2013. Trial was originally scheduled for October 2013, but has been moved to April 2014. This matter is ongoing.

The Company cannot predict the outcome of the above-referenced pending matters and an adverse resolution of these lawsuits could have a material adverse effect on the Company’s financial position, liquidity, results of operations, and/or indemnification obligations. In addition, various other claims and legal proceedings generally incidental to the normal course of business are pending or threatened on behalf of or against the Company. While we cannot predict the outcome of these incidental matters, we believe that any liability arising from them will not have a material adverse effect on our financial position, liquidity, or results of operations.

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Document and Entity Information	3 Months Ended
	Mar. 30, 2014
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 30, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q1
Entity Registrant Name	COGNEX CORP
Entity Central Index Key	0000851205
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	86,840,001

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Guarantees

3 Months Ended

Mar. 30, 2014

Guarantees [Abstract]

Guarantees

In the ordinary course of business, the Company enters into guarantee contracts with certain customers, generally in the Company’s Surface Inspection Systems Division (SISD) business. These guarantees represent standby letters of credit (LOC) which can be grouped into three categories: (1) bank guarantees which may require the Company to return a customer’s initial payment if the Company cannot deliver the order; (2) warranty bonds which may require the Company to resolve warranty issues within a specified time period; and (3) performance bonds which include a combination of the above two options. The type of LOC is generally determined based upon customer request and the guarantee amount represents the maximum potential amount of future payments. All of the Company’s LOCs are with the same counterparty and they do not contain any recourse provisions or collateral obligations.

The following table details the letters of credit outstanding as of March 30, 2014:

Type	Guarantee Amount (in thousands)		Guarantee Due Date
Warranty bonds	$	976	Various from April 2014 to June 2016
Performance bonds	398		Various from June 2014 to July 2016
Bank guarantees	373		Various from April 2014 to July 2014
	$	1,747

The Company evaluates losses for guarantees under accounting for contingencies. The Company considers such factors as the degree of probability that the Company would be required to satisfy the guarantee and the ability to make a reasonable estimate of the loss. To date, the Company has not incurred any losses as a result of these obligations, and therefore, has not recorded any liability related to such obligation in its financial statements. The fair value of the Company’s outstanding guarantees is immaterial for all periods presented.

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Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 18,506	$ 15,583
Cash flows hedges [Abstract]
Change in net unrealized gain (loss), net of tax of ($16) and $0 in 2014 and 2013, respectively	(166)	0
Reclassification adjustments for loss (gain) included in net income	33	0
Net change related to cash flow hedges	(199)	0
Available-for-sale investments
Change in net unrealized gain (loss), net of tax of $113 and $42 in 2014 and 2013, respectively	518	142
Reclassification of net realized gain on the sale of available-for-sale investments	(501)	(31)
Net change related to available-for-sale investments	1,019	173
Currency translation adjustments [Abstract]
Change in currency translation adjustments, net of tax of $7 and ($227) in 2014 and 2013, respectively	445	(2,494)
Other comprehensive income (loss), net of tax	1,265	(2,321)
Total comprehensive income	$ 19,771	$ 13,262

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Fair Value Measurements

3 Months Ended

Mar. 30, 2014

Fair Value Disclosures [Abstract]

Fair Value Measurements

Financial Assets and Liabilities that are Measured at Fair Value on a Recurring Basis

The following table summarizes the financial assets and liabilities required to be measured at fair value on a recurring basis as of March 30, 2014 (in thousands):

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Assets:
Money market instruments	$	5,723	$	—
Corporate bonds	—		224,352
Treasury bills	—		86,804
Asset-backed securities	—		74,885
Sovereign bonds	—		20,417
Municipal bonds	—		11,779
Agency bonds	—		1,500
Cash flow hedge forward contracts	—		33
Liabilities:
Cash flow hedge forward contracts	—		112

The Company’s money market instruments are reported at fair value based upon the daily market price for identical assets in active markets, and are therefore classified as Level 1.

The Company’s debt securities and forward contracts are reported at fair value based upon model-driven valuations in which all significant inputs are observable or can be derived from or corroborated by observable market data for substantially the full term of the asset or liability, and are therefore classified as Level 2. Management is responsible for estimating the fair value of these financial assets and liabilities, and in doing so, considers valuations provided by a large, third-party pricing service. For debt securities, this service maintains regular contact with market makers, brokers, dealers, and analysts to gather information on market movement, direction, trends, and other specific data. They use this information to structure yield curves for various types of debt securities and arrive at the daily valuations. The Company's forward contracts are typically traded or executed in over-the-counter markets with a high degree of pricing transparency. The market participants are generally large commercial banks.

The Company did not record an other-than-temporary impairment of these financial assets or liabilities during the three-month period ended March 30, 2014.

Financial Assets that are Measured at Fair Value on a Non-recurring Basis

The Company has an interest in a limited partnership, which is accounted for using the cost method and is required to be measured at fair value on a non-recurring basis. Management is responsible for estimating the fair value of this investment, and in doing so, considers valuations of the partnership’s investments as determined by the General Partner. Publicly-traded investments in active markets are reported at the market closing price less a discount, as appropriate, to reflect restricted marketability. Fair value for private investments for which observable market prices in active markets do not exist is based upon the best information available including the value of a recent financing, reference to observable valuation measures for comparable companies (such as revenue multiples), public or private transactions (such as the sale of a comparable company), and valuations for publicly-traded comparable companies. The valuations also incorporate the General Partner’s own judgment and close familiarity with the business activities of each portfolio company. Significant increases or decreases in any of these inputs in isolation may result in a significantly lower or higher fair value measurement. The portfolio consists of securities of public and private companies, and consequently, inputs used in the fair value calculation are classified as Level 3. The Company did not record an other-than-temporary impairment of this asset during the three-month period ended March 30, 2014.

Non-financial Assets that are Measured at Fair Value on a Non-recurring Basis

Non-financial assets such as goodwill, intangible assets, and property, plant, and equipment are required to be measured at fair value only when an impairment loss is recognized. The Company did not record an impairment charge related to these assets during the three-month period ended March 30, 2014.

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Summary of Significant Accounting Policies

3 Months Ended

Mar. 30, 2014

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

As permitted by the rules of the Securities and Exchange Commission applicable to Quarterly Reports on Form 10-Q, these notes are condensed and do not contain all disclosures required by generally accepted accounting principles (GAAP). Reference should be made to the consolidated financial statements and related notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.

In the opinion of the management of Cognex Corporation (the “Company”), the accompanying consolidated unaudited financial statements contain all adjustments, consisting of normal, recurring adjustments and financial statement reclassifications necessary to present fairly the Company’s financial position as of March 30, 2014, and the results of its operations for the three-month periods ended March 30, 2014 and March 31, 2013, and changes in shareholders’ equity, comprehensive income, and cash flows for the periods presented.

The results disclosed in the Consolidated Statements of Operations for the three-month period ended March 30, 2014 are not necessarily indicative of the results to be expected for the full year.

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Taxes

3 Months Ended

Mar. 30, 2014

Income Tax Disclosure [Abstract]

Taxes

A reconciliation of the United States federal statutory corporate tax rate to the Company’s effective tax rate, or income tax provision, was as follows:

	Three-months Ended
	March 30, 2014		March 31, 2013
Income tax provision at federal statutory rate	35	%	35	%
State income taxes, net of federal benefit	1	%	2	%
Foreign tax rate differential	(17	)%	(17	)%
Tax credit	—	%	(1	)%
Discrete tax events	—	%	(3	)%
Income tax provision	19	%	16	%

The effective tax rate for the three-month period ended March 31, 2013 included a discrete event that decreased tax expense by $555,000, net of related reserves for income taxes, from the retroactive application of the 2012 research and development credit. The American Taxpayer Relief Act of 2012 was passed by Congress and signed into law on January 1, 2013. The provisions under this law were applied retroactively to January 1, 2012. As a result of the law being signed on January 1, 2013, the financial impact of the retroactive provision was recorded as a discrete event in the first quarter of 2013.This discrete tax event decreased the effective tax rate from a provision of 19% to a provision of 16% for the first quarter of 2013.

During the three-month period ended March 30, 2014, the Company recorded a $175,000increase in reserves for income taxes, net of deferred tax benefit, for uncertain tax positions that were recorded as income tax expense. Estimated interest and penalties included in these amounts totaled $40,000 for the three-month period ended March 30, 2014.

In the first quarter of 2014, management adopted Accounting Standards Update (ASU) 2013-11, "Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists." This ASU requires companies to present an unrecognized tax benefit, or a portion thereof, as a reduction to a deferred tax asset for a net operating loss (NOL) carryforward or a similar tax loss or tax credit carryforward. During the three-month period ended March 30, 2014, the Company reclassified a reserve for income taxes of $1,028,000 as a reduction to noncurrent deferred tax assets in compliance with this new guidance. Retroactive application was not required under this ASU, and therefore, prior periods were not restated.

The Company’s reserve for income taxes, including gross interest and penalties, was $4,967,000 as of March 30, 2014, which included $3,939,000 classified as a noncurrent liability and $1,028,000 recorded as a reduction to noncurrent deferred tax assets. The amount of gross interest and penalties included in these balances was $415,000. If the Company’s tax positions were sustained or the statutes of limitations related to certain positions expired, these reserves would be released and income tax expense would be reduced in a future period, less $451,000 that would be recorded through additional paid-in capital. As a result of the expiration of certain statutes of limitations and the conclusion of an IRS examination, there is a potential that a portion of these reserves could be released, which would decrease income tax expense by approximately $700,000 to $800,000 over the next twelve months.

The Company has defined its major tax jurisdictions as the United States, Ireland, China, and Japan, and within the United States, Massachusetts and California. Within the United States, the tax years 2012 through 2013 remain open to examination by various taxing authorities, while the tax years 2009 through 2013 remain open to examination by various taxing authorities in other jurisdictions in which the Company operates.

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Indemnification Provisions

3 Months Ended

Mar. 30, 2014

Guarantees [Abstract]

Indemnification Provisions

Except as limited by Massachusetts law, the by-laws of the Company require it to indemnify certain current or former directors, officers, and employees of the Company against expenses incurred by them in connection with each proceeding in which he or she is involved as a result of serving or having served in certain capacities. Indemnification is not available with respect to a proceeding as to which it has been adjudicated that the person did not act in good faith in the reasonable belief that the action was in the best interests of the Company. The maximum potential amount of future payments the Company could be required to make under these provisions is unlimited. The Company has never incurred significant costs related to these indemnification provisions. As a result, the Company believes the estimated fair value of these provisions is minimal.

In the ordinary course of business, the Company may accept standard limited indemnification provisions in connection with the sale of its products, whereby it indemnifies its customers for certain direct damages incurred in connection with third-party patent or other intellectual property infringement claims with respect to the use of the Company’s products. The term of these indemnification provisions generally coincides with the customer’s use of the Company’s products. The maximum potential amount of future payments the Company could be required to make under these provisions is generally subject to fixed monetary limits. The Company has never incurred significant costs to defend lawsuits or settle claims related to these indemnification provisions. As a result, the Company believes the estimated fair value of these provisions is minimal.

In the ordinary course of business, the Company also accepts limited indemnification provisions from time to time, whereby it indemnifies customers for certain direct damages incurred in connection with bodily injury and property damage arising from the installation of the Company’s products. The term of these indemnification provisions generally coincides with the period of installation. The maximum potential amount of future payments the Company could be required to make under these provisions is generally limited and is likely recoverable under the Company’s insurance policies. As a result of this coverage, and the fact that the Company has never incurred significant costs to defend lawsuits or settle claims related to these indemnification provisions, the Company believes the estimated fair value of these provisions is minimal.

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Intangible Assets and Goodwill

3 Months Ended

Mar. 30, 2014

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets and Goodwill

The Company evaluates the possible impairment of goodwill and other intangible assets whenever events or circumstances indicate that the carrying value of these assets may not be recoverable. No triggering event occurred in the three-month period ended March 30, 2014 that would indicate a potential impairment of goodwill or other intangible assets.

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Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013	Dec. 31, 2013
Tax Credit Carryforward [Line Items]
Provision for effective tax rate	19.00%	16.00%
Increase (decrease) in liabilities, net of deferred tax benefit, for uncertain tax positions	$ 175
Increase (decrease) in interest and penalties	40
Unrecognized tax benefit shown as a reduction to noncurrent deferred tax assets	1,028
Liability For Uncertain Tax Positions	4,967
Reserve for income taxes, total	3,939		4,765
Interest and penalties, gross	415
Reserve for income taxes to be recorded in additional paid in capital	451
Minimum decrease in income tax expense due to release in reserves	700
Maximum decrease in income tax expense due to release in reserves	800
Tax years open to examination by various taxing authorities	2012 through 2013
Tax years open to examination by various taxing authorities for other entities	2009 through 2013
Research and Development Tax Credit [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforward		$ 555

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Cash, Cash Equivalents, and Investments

3 Months Ended

Mar. 30, 2014

Cash and Cash Equivalents [Abstract]

Cash, Cash Equivalents, and Investments

Cash, cash equivalents, and investments consisted of the following (in thousands):

	March 30, 2014		December 31, 2013
Cash	$	36,740	$	40,124
Money market instruments	5,723		520
Cash and cash equivalents	42,463		40,644
Corporate bonds	33,585		109,040
Municipal bonds	4,766		9,276
Sovereign bonds	3,016		11,448
Asset-backed securities	410		53,559
Agency bonds	—		1,499
Short-term investments	41,777		184,822
Corporate bonds	190,767		109,909
Treasury bills	86,804		73,666
Asset-backed securities	74,475		21,820
Sovereign bonds	17,401		16,385
Municipal bonds	7,013		5,919
Agency bonds	1,500		—
Limited partnership interest	1,956		1,956
Long-term investments	379,916		229,655
	$	464,156	$	455,121

The Company’s investment portfolio includes corporate bonds, municipal bonds, sovereign bonds, asset-backed securities, treasury bills, and agency bonds. Corporate bonds consist of debt securities issued by both domestic and foreign companies; municipal bonds consist of debt securities issued by state and local government entities; sovereign bonds consist of direct debt issued by foreign governments; asset-backed securities consist of debt securities collateralized by pools of receivables or loans with credit enhancement; treasury bills consist of debt securities issued by both the U.S. and foreign governments; and agency bonds consist of domestic or foreign obligations of government agencies and government sponsored enterprises that have government backing.

The following table summarizes the Company’s available-for-sale investments as of March 30, 2014 (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Short-term:
Corporate bonds	$	33,480	$	105	$	—		$	33,585
Municipal bonds	4,758		8		—			4,766
Sovereign bonds	2,996		20		—			3,016
Asset-backed securities	410		—		—			410
Long-term:
Corporate bonds	190,185		680		(98		)	190,767
Treasury bills	86,941		2		(139		)	86,804
Asset-backed securities	74,471		69		(65		)	74,475
Sovereign bonds	17,367		52		(18		)	17,401
Municipal bonds	6,968		45		—			7,013
Agency bonds	1,500		—		—			1,500
	$	419,076	$	981	$	(320	)	$	419,737

The following table summarizes the Company’s gross unrealized losses and fair values for available-for-sale investments in an unrealized loss position as of March 30, 2014 (in thousands):

	Unrealized Loss Position For:
	Less than 12 Months					12 Months or Greater					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Corporate bonds	$	55,024	$	(98	)	$	—	$	—		$	55,024	$	(98	)
Asset-backed securities	23,535		(38		)	8,456		(27		)	31,991		(65		)
Sovereign bonds	3,347		(18		)	—		—			3,347		(18		)
Treasury bills	82,753		(139		)	—		—			82,753		(139		)
	$	164,659	$	(293	)	$	8,456	$	(27	)	$	173,115	$	(320	)

As of March 30, 2014, the Company did not recognize an other-than-temporary impairment of these investments. In its evaluation, management considered the type of security, the credit rating of the security, the length of time the security has been in a loss position, the size of the loss position, our intent and ability to hold the security to expected recovery of value, and other meaningful information. The Company does not intend to sell, and is unlikely to be required to sell, any of these available-for-sale investments before its effective maturity or market price recovery.

The Company recorded gross realized gains and gross realized losses on the sale of investments totaling $512,000 and $11,000, respectively, during the three-month period ended March 30, 2014 and $50,000 and $19,000, respectively, during the three-month period ended March 31, 2013. These gains and losses are included in "Investment income" on the Consolidated Statements of Operations.

The following table presents the effective maturity dates of the Company’s available-for-sale investments as of March 30, 2014 (in thousands):

	1 Year or Less		1-2 Years		2-3 Years		3-4 Years		4-5 Years		5-8 Years		Total
Corporate bonds	$	33,585	$	64,435	$	94,424	$	2,428	$	29,480	$	—	$	224,352
Treasury bills	—		32,317		54,487		—		—		—		86,804
Asset-backed securities	410		5,287		14,663		29,396		21,243		3,886		74,885
Sovereign bonds	3,016		12,502		4,899		—		—		—		20,417
Municipal bonds	4,766		3,981		1,475		1,557		—		—		11,779
Agency bonds	—		—		1,500		—		—		—		1,500
	$	41,777	$	118,522	$	171,448	$	33,381	$	50,723	$	3,886	$	419,737

The Company is a Limited Partner in Venrock Associates III, L.P. (Venrock), a venture capital fund. The Company has committed to a total investment in the limited partnership of up to $20,500,000, with an expiration date of December 31, 2015. As of March 30, 2014, the Company contributed $19,886,000 to the partnership. The remaining commitment of $614,000 can be called by Venrock at any time before December 31, 2015. Distributions and contributions are at the discretion of Venrock’s management. No contributions were made and no distributions were received during the three-month period ended March 30, 2014.

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Inventories

3 Months Ended

Mar. 30, 2014

Inventory Disclosure [Abstract]

Inventories

Inventories consisted of the following (in thousands):

	March 30, 2014		December 31, 2013
Raw materials	$	12,958	$	13,101
Work-in-process	7,521		4,472
Finished goods	7,955		8,121
	$	28,434	$	25,694

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Warranty Obligations

3 Months Ended

Mar. 30, 2014

Guarantees [Abstract]

Warranty Obligations

The Company records the estimated cost of fulfilling product warranties at the time of sale based upon historical costs to fulfill claims. Obligations may also be recorded subsequent to the time of sale whenever specific events or circumstances impacting product quality become known that would not have been taken into account using historical data. While we engage in extensive product quality programs and processes, including actively monitoring and evaluating the quality of our component suppliers and third-party contract manufacturers, the Company’s warranty obligation is affected by product failure rates, material usage, and service delivery costs incurred in correcting a product failure. An adverse change in any of these factors may result in the need for additional warranty provisions. Warranty obligations are included in “Accrued expenses” on the Consolidated Balance Sheets.

The changes in the warranty obligations were as follows (in thousands):

Balance as of December 31, 2013	$	3,016
Provisions for warranties issued during the period	759
Fulfillment of warranty obligations	(524		)
Foreign exchange rate changes	8
Balance as of March 30, 2014	$	3,259

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Segment Information - Information About Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
Product revenue	$ 83,569	$ 74,672
Service revenue	7,360	6,220
Operating income	22,443	17,981
Operating Segments | MVSD
Segment Reporting Information [Line Items]
Product revenue	77,618	68,319
Service revenue	3,698	2,092
Operating income	28,292	22,076
Operating Segments | SISD
Segment Reporting Information [Line Items]
Product revenue	5,951	6,353
Service revenue	3,662	4,128
Operating income	1,013	1,732
Reconciling Items
Segment Reporting Information [Line Items]
Operating income	$ (6,862)	$ (5,827)

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Segment Information - Additional Information (Detail)	3 Months Ended
	Mar. 30, 2014 Segment
Segment Reporting [Abstract]
Number of reportable segments	2

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Weighted-Average Shares (Tables)

3 Months Ended

Mar. 30, 2014

Earnings Per Share [Abstract]

Calculation of Weighted-Average Shares

Weighted-average shares were calculated as follows (in thousands):

	Three-months Ended
	March 30, 2014	March 31, 2013
Basic weighted-average common shares outstanding	86,879	86,522
Effect of dilutive stock options	2,380	1,738
Weighted-average common and common-equivalent shares outstanding	89,259	88,260

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Derivative Instruments - Assets and liabilities presented on a net basis due to the right of setoff (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2014	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gross amounts of recognized assets	$ 38	$ 210
Gross amounts offset	(5)	0
Net amount of assets presented	33	210
Gross amounts of recognized liabilities	128	122
Gross amounts offset	(16)	0
Net amount of liabilities presented	$ 112	$ 122

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Stock-Based Compensation Expense

3 Months Ended

Mar. 30, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-Based Compensation Expense

The Company’s share-based payments that result in compensation expense consist solely of stock option grants. As of March 30, 2014, the Company had 10,024,230 shares available for grant. Generally, stock options are granted with an exercise price equal to the market value of the Company’s common stock at the grant date, vest over four years based upon continuous service, and expire ten years from the grant date.

The following table summarizes the Company’s stock option activity for the three-month period ended March 30, 2014:

	Shares (in thousands)		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding as of December 31, 2013	6,138		$	15.65
Granted	1,206		39.31
Exercised	(396	)	15.02
Forfeited or expired	(73	)	18.02
Outstanding as of March 30, 2014	6,875		$	19.80	7.4	$	98,435
Exercisable as of March 30, 2014	2,481		$	13.59	5.8	$	48,212
Options vested or expected to vest at   March 30, 2014 (1)	6,130		$	18.93	7.2	$	92,123

 (1) In addition to the vested options, the Company expects a portion of the unvested options to vest at some point in the future. Options expected to vest are calculated by applying an estimated forfeiture rate to the unvested options.

The fair values of stock options granted in each period presented were estimated using the following weighted-average assumptions:

	Three-months Ended
	March 30, 2014		March 31, 2013
Risk-free rate	2.7	%	2.1	%
Expected dividend yield	—	%	—	%
Expected volatility	41	%	42	%
Expected term (in years)	5.4		5.9

Risk-free rate

The risk-free rate was based upon a treasury instrument whose term was consistent with the contractual term of the option.

Expected dividend yield

Generally, the current dividend yield is calculated by annualizing the cash dividend declared by the Company’s Board of Directors and dividing that result by the closing stock price on the grant date. However, in the fourth quarter of 2012, the Company paid the full annual dividends for 2013 and 2014 in advance, and therefore, the dividend yield for those years has been adjusted to zero. At the time of the 2014 valuation, a dividend yield of 0.56% was estimated for future periods from 2015 through the expected life of the option.

Expected volatility

The expected volatility was based upon a combination of historical volatility of the Company’s common stock over the contractual term of the option and implied volatility for traded options of the Company’s stock.

Expected term

The expected term was derived from the binomial lattice model from the impact of events that trigger exercises over time.

The weighted-average grant-date fair values of stock options granted during the three-month periods ended March 30, 2014 and March 31, 2013 were $15.34 and $8.07, respectively.

The Company stratifies its employee population into two groups: one consisting of senior management and another consisting of all other employees. The Company currently expects that approximately 72% of its stock options granted to senior management and 70% of its options granted to all other employees will actually vest. Therefore, the Company currently applies an estimated annual forfeiture rate of 11% to all unvested options for senior management and a rate of 12% for all other employees. The Company revised its estimated forfeiture rates in the first quarters of 2014 and 2013, resulting in an increase to compensation expense of $288,000 and $300,000, respectively.

The total stock-based compensation expense and the related income tax benefit recognized for the three-month period ended March 30, 2014 were$4,004,000 and $1,306,000, respectively, and for the three-month period ended March 31, 2013 were $3,298,000 and $1,094,000, respectively. No compensation expense was capitalized as of March 30, 2014 or December 31, 2013.

The following table details the stock-based compensation expense by caption for each period presented on the Consolidated Statements of Operations (in thousands):

	Three-months Ended
	March 30, 2014		March 31, 2013
Product cost of revenue	$	285	$	227
Service cost of revenue	63		63
Research, development, and engineering	1,056		813
Selling, general, and administrative	2,600		2,195
	$	4,004	$	3,298

The total intrinsic values of stock options exercised for the three-month periods ended March 30, 2014 and March 31, 2013 were $8,933,000 and $7,193,000, respectively. The total fair values of stock options vested for the three-month periods ended March 30, 2014 and March 31, 2013 were $8,361,000 and $6,932,000, respectively.

As of March 30, 2014, total unrecognized compensation expense related to non-vested stock options was $19,791,000, which is expected to be recognized over a weighted-average period of 1.60 years.

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Fair Value Measurements (Tables)

3 Months Ended

Mar. 30, 2014

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following table summarizes the financial assets and liabilities required to be measured at fair value on a recurring basis as of March 30, 2014 (in thousands):

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Assets:
Money market instruments	$	5,723	$	—
Corporate bonds	—		224,352
Treasury bills	—		86,804
Asset-backed securities	—		74,885
Sovereign bonds	—		20,417
Municipal bonds	—		11,779
Agency bonds	—		1,500
Cash flow hedge forward contracts	—		33
Liabilities:
Cash flow hedge forward contracts	—		112

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Derivative Instruments - Outstanding Forward Contracts (Detail) In Thousands, unless otherwise specified	Mar. 30, 2014 Designated as Hedging Instrument Japanese Yen USD ($)	Mar. 30, 2014 Designated as Hedging Instrument Japanese Yen JPY (¥)	Dec. 31, 2013 Designated as Hedging Instrument Japanese Yen USD ($)	Dec. 31, 2013 Designated as Hedging Instrument Japanese Yen JPY (¥)	Mar. 30, 2014 Designated as Hedging Instrument Hungarian Forint USD ($)	Mar. 30, 2014 Designated as Hedging Instrument Hungarian Forint HUF	Dec. 31, 2013 Designated as Hedging Instrument Hungarian Forint USD ($)	Dec. 31, 2013 Designated as Hedging Instrument Hungarian Forint HUF	Mar. 30, 2014 Designated as Hedging Instrument Singapore Dollar USD ($)	Mar. 30, 2014 Designated as Hedging Instrument Singapore Dollar SGD	Dec. 31, 2013 Designated as Hedging Instrument Singapore Dollar USD ($)	Dec. 31, 2013 Designated as Hedging Instrument Singapore Dollar SGD	Mar. 30, 2014 Designated as Hedging Instrument British Pound USD ($)	Mar. 30, 2014 Designated as Hedging Instrument British Pound GBP (£)	Dec. 31, 2013 Designated as Hedging Instrument British Pound USD ($)	Dec. 31, 2013 Designated as Hedging Instrument British Pound GBP (£)	Mar. 30, 2014 Designated as Hedging Instrument Canada, Dollars USD ($)	Mar. 30, 2014 Designated as Hedging Instrument Canada, Dollars CAD	Dec. 31, 2013 Designated as Hedging Instrument Canada, Dollars USD ($)	Dec. 31, 2013 Designated as Hedging Instrument Canada, Dollars CAD	Mar. 30, 2014 Not Designated as Hedging Instrument Japanese Yen USD ($)	Mar. 30, 2014 Not Designated as Hedging Instrument Japanese Yen JPY (¥)	Dec. 31, 2013 Not Designated as Hedging Instrument Japanese Yen USD ($)	Dec. 31, 2013 Not Designated as Hedging Instrument Japanese Yen JPY (¥)	Mar. 30, 2014 Not Designated as Hedging Instrument Hungarian Forint USD ($)	Mar. 30, 2014 Not Designated as Hedging Instrument Hungarian Forint HUF	Dec. 31, 2013 Not Designated as Hedging Instrument Hungarian Forint USD ($)	Dec. 31, 2013 Not Designated as Hedging Instrument Hungarian Forint HUF	Mar. 30, 2014 Not Designated as Hedging Instrument Euro USD ($)	Mar. 30, 2014 Not Designated as Hedging Instrument Euro EUR (€)	Dec. 31, 2013 Not Designated as Hedging Instrument Euro USD ($)	Dec. 31, 2013 Not Designated as Hedging Instrument Euro EUR (€)	Mar. 30, 2014 Not Designated as Hedging Instrument British Pound USD ($)	Mar. 30, 2014 Not Designated as Hedging Instrument British Pound GBP (£)	Dec. 31, 2013 Not Designated as Hedging Instrument British Pound USD ($)	Dec. 31, 2013 Not Designated as Hedging Instrument British Pound GBP (£)	Mar. 30, 2014 Not Designated as Hedging Instrument Chinese Renminbi USD ($)	Mar. 30, 2014 Not Designated as Hedging Instrument Chinese Renminbi CNY	Dec. 31, 2013 Not Designated as Hedging Instrument Chinese Renminbi USD ($)	Dec. 31, 2013 Not Designated as Hedging Instrument Chinese Renminbi CNY	Mar. 30, 2014 Not Designated as Hedging Instrument Taiwanese Dollar USD ($)	Mar. 30, 2014 Not Designated as Hedging Instrument Taiwanese Dollar TWD	Dec. 31, 2013 Not Designated as Hedging Instrument Taiwanese Dollar USD ($)	Dec. 31, 2013 Not Designated as Hedging Instrument Taiwanese Dollar TWD	Mar. 30, 2014 Not Designated as Hedging Instrument Korea (South), Won USD ($)	Mar. 30, 2014 Not Designated as Hedging Instrument Korea (South), Won KRW	Dec. 31, 2013 Not Designated as Hedging Instrument Korea (South), Won USD ($)	Dec. 31, 2013 Not Designated as Hedging Instrument Korea (South), Won KRW	Mar. 30, 2014 Not Designated as Hedging Instrument Brazil, Brazil Real USD ($)	Mar. 30, 2014 Not Designated as Hedging Instrument Brazil, Brazil Real BRL	Dec. 31, 2013 Not Designated as Hedging Instrument Brazil, Brazil Real USD ($)	Dec. 31, 2013 Not Designated as Hedging Instrument Brazil, Brazil Real BRL
Derivative [Line Items]
Outstanding forward contracts	$ 6,514	¥ 665,000	$ 6,122	¥ 625,000	$ 2,872	639,750	$ 2,603	570,175	$ 2,472	3,049	$ 2,346	2,867	$ 1,112	£ 673	$ 1,010	£ 613	$ 1,107	1,199	$ 932	985	$ 0	¥ 0	$ 2,797	¥ 294,500	$ 0	0	$ 568	123,000	$ 0	€ 0	$ 3,887	€ 2,828	$ 0	£ 0	$ 1,820	£ 1,100	$ 0	0	$ 1,467	9,000	$ 0	0	$ 908	27,000	$ 0	0	$ 620	650,000	$ 0	0	$ 106	250

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Cash, Cash Equivalents, and Investments - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Gross realized gains on sale of investments	$ 512,000	$ 50,000
Gross realized losses on sale of investments	11,000	19,000
Maximum amount committed to invest in limited partnership	20,500,000
Contribution to limited partnership	19,886,000
Remaining amount of commitment in limited partnership	614,000
Investment expiration date	Dec. 31, 2015
Number of contributions made during the period	0
Distributions From Partnership During Period	$ 0

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Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]
Tax effect on cash flow hedges	$ (16)	$ 0
Tax effect of unrealized gain (loss) on available-for-sale investments	113	42
Tax effect of foreign currency translation adjustment	$ 7	$ (227)

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Consolidated Statement of Shareholders' Equity (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 30, 2014
Statement of Stockholders' Equity [Abstract]
Tax effect on cash flow hedges	$ (16)
Tax effect of unrealized gain (loss) on available-for-sale investments	113
Foreign currency translation adjustment, tax	$ 7

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Stock Repurchase Program - Additional Information (Detail) (USD $) Share data in Thousands, unless otherwise specified	3 Months Ended	1 Months Ended		3 Months Ended	0 Months Ended
	Mar. 30, 2014	Apr. 30, 2008 Common Stock Repurchase Program 2008 [Member]	Nov. 30, 2011 Common Stock Repurchase Program 2011 [Member]	Mar. 30, 2014 Common Stock Repurchase Program 2011 [Member]	Apr. 29, 2014 Common Stock Repurchase Program 2014 [Member] Subsequent Event [Member]
Equity [Line Items]
Repurchase of authorized common stock		$ 50,000,000	$ 80,000,000		$ 50,000,000
Aggregate shares repurchased				1,272
Aggregate shares repurchased, value				42,195,000
Repurchase of shares during period				380
Repurchase of shares during period, value	$ 14,287,000			$ 14,287,000

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Cash, Cash Equivalents, and Investments (Tables)

3 Months Ended

Mar. 30, 2014

Cash and Cash Equivalents [Abstract]

Components of Cash, Cash Equivalents, and Investments

Cash, cash equivalents, and investments consisted of the following (in thousands):

	March 30, 2014		December 31, 2013
Cash	$	36,740	$	40,124
Money market instruments	5,723		520
Cash and cash equivalents	42,463		40,644
Corporate bonds	33,585		109,040
Municipal bonds	4,766		9,276
Sovereign bonds	3,016		11,448
Asset-backed securities	410		53,559
Agency bonds	—		1,499
Short-term investments	41,777		184,822
Corporate bonds	190,767		109,909
Treasury bills	86,804		73,666
Asset-backed securities	74,475		21,820
Sovereign bonds	17,401		16,385
Municipal bonds	7,013		5,919
Agency bonds	1,500		—
Limited partnership interest	1,956		1,956
Long-term investments	379,916		229,655
	$	464,156	$	455,121

Summary of Available-for-Sale Investments

The following table summarizes the Company’s available-for-sale investments as of March 30, 2014 (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Short-term:
Corporate bonds	$	33,480	$	105	$	—		$	33,585
Municipal bonds	4,758		8		—			4,766
Sovereign bonds	2,996		20		—			3,016
Asset-backed securities	410		—		—			410
Long-term:
Corporate bonds	190,185		680		(98		)	190,767
Treasury bills	86,941		2		(139		)	86,804
Asset-backed securities	74,471		69		(65		)	74,475
Sovereign bonds	17,367		52		(18		)	17,401
Municipal bonds	6,968		45		—			7,013
Agency bonds	1,500		—		—			1,500
	$	419,076	$	981	$	(320	)	$	419,737

Gross Unrealized Losses and Fair Values for Available-for-Sale Investments

The following table summarizes the Company’s gross unrealized losses and fair values for available-for-sale investments in an unrealized loss position as of March 30, 2014 (in thousands):

	Unrealized Loss Position For:
	Less than 12 Months					12 Months or Greater					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Corporate bonds	$	55,024	$	(98	)	$	—	$	—		$	55,024	$	(98	)
Asset-backed securities	23,535		(38		)	8,456		(27		)	31,991		(65		)
Sovereign bonds	3,347		(18		)	—		—			3,347		(18		)
Treasury bills	82,753		(139		)	—		—			82,753		(139		)
	$	164,659	$	(293	)	$	8,456	$	(27	)	$	173,115	$	(320	)

Effective Maturity Dates of Available-for-Sale Investments

The following table presents the effective maturity dates of the Company’s available-for-sale investments as of March 30, 2014 (in thousands):

	1 Year or Less		1-2 Years		2-3 Years		3-4 Years		4-5 Years		5-8 Years		Total
Corporate bonds	$	33,585	$	64,435	$	94,424	$	2,428	$	29,480	$	—	$	224,352
Treasury bills	—		32,317		54,487		—		—		—		86,804
Asset-backed securities	410		5,287		14,663		29,396		21,243		3,886		74,885
Sovereign bonds	3,016		12,502		4,899		—		—		—		20,417
Municipal bonds	4,766		3,981		1,475		1,557		—		—		11,779
Agency bonds	—		—		1,500		—		—		—		1,500
	$	41,777	$	118,522	$	171,448	$	33,381	$	50,723	$	3,886	$	419,737

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Cash, Cash Equivalents, and Investments - Components of Cash, Cash Equivalents, and Investments (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Cash	$ 36,740	$ 40,124
Money market instruments	5,723	520
Cash and cash equivalents	42,463	40,644	42,757	45,160
Short-term investments	41,777	184,822
Limited partnership interest	1,956	1,956
Long-term investments	379,916	229,655
Total	464,156	455,121
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	33,585	109,040
Long-term investments	190,767	109,909
Treasury Bills
Schedule of Available-for-sale Securities [Line Items]
Long-term investments	86,804	73,666
Municipal Bonds
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	4,766	9,276
Long-term investments	7,013	5,919
Asset-Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	410	53,559
Long-term investments	74,475	21,820
Sovereign Bonds
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	3,016	11,448
Long-term investments	17,401	16,385
Agency Bonds
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	0	1,499
Long-term investments	$ 1,500	$ 0

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Derivative Instruments

3 Months Ended

Mar. 30, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments

The Company is exposed to certain risks relating to its ongoing business operations including foreign currency exchange rate risk and interest rate risk. The Company currently mitigates certain foreign currency exchange rate risks with derivative instruments. The Company does not currently manage its interest rate risk with derivative instruments.

The Company faces exposure to foreign currency exchange rate fluctuations, as a significant portion of its revenues, expenses, assets, and liabilities are denominated in currencies other than the functional currencies of the Company’s subsidiaries or the reporting currency of the Company, which is the U.S. Dollar. The Company faces two types of foreign currency exchange rate exposures: 

• Transactional currency/functional currency exchange rate exposures from transactions that are denominated in currencies other than the functional currency of the subsidiary. These transaction gains and losses are reported in "Foreign currency gain (loss)" on the Consolidated Statements of Operations.

• Functional currency/reporting currency exchange rate exposures from the revaluation of the assets and liabilities of our foreign subsidiaries, whose functional currency is generally their local currency, to the Company’s reporting currency, which is the U.S. Dollar. These translation gains and losses are reported in “Accumulated other comprehensive loss” on the Consolidated Balance Sheets and also on the Consolidated Statements of Comprehensive Income.

The Company’s foreign currency risk management strategy is principally designed to mitigate the potential financial impact of changes in the value of transactions and balances denominated in foreign currencies resulting from changes in foreign currency exchange rates. Currently, the Company enters into two types of hedges to manage this risk. The first are economic hedges which utilize foreign currency forward contracts with maturities of up to 45 days to manage the exposure to fluctuations in foreign currency exchange rates arising primarily from foreign-denominated receivables and payables. The gains and losses on these derivatives are largely offset by changes in the fair value of the assets and liabilities being hedged. The second are cash flow hedges which utilize foreign currency forward contracts with maturities of up to 18 months to hedge specific forecasted transactions of the Company's foreign subsidiaries with the goal of protecting our budgeted revenues and expenses against foreign currency exchange rate changes compared to our budgeted rates.

The Company had the following outstanding forward contracts that were entered into to mitigate foreign currency exchange rate risk (in thousands):

	As of March 30, 2014			As of December 31, 2013
Currency	Notional Value	USD Equivalent		Notional Value	USD Equivalent
Derivatives Designated as Hedging Instruments:
Japanese Yen	665,000	$	6,514	625,000	$	6,122
Hungarian Forint	639,750	2,872		570,175	2,603
Singapore Dollar	3,049	2,472		2,867	2,346
British Pound	673	1,112		613	1,010
Canadian Dollar	1,199	1,107		985	932
Derivatives Not Designated as Hedging Instruments:
Euro	—	$	—	2,828	$	3,887
Japanese Yen	—	—		294,500	2,797
British Pound	—	—		1,100	1,820
Chinese Renminbi	—	—		9,000	1,467
Taiwanese Dollar	—	—		27,000	908
Korean Won	—	—		650,000	620
Hungarian Forint	—	—		123,000	568
Brazilian Real	—	—		250	106

Information regarding the fair value of the outstanding forward contracts was as follows (in thousands):

	Asset Derivatives					Liability Derivatives
	Balance	Fair Value				Balance	Fair Value
	Sheet Location	March 30, 2014		December 31, 2013		Sheet Location	March 30, 2014		December 31, 2013
Derivatives Designated as Hedging Instruments:
Cash flow hedge forward contracts	Prepaid expenses and other current assets	$	33	$	204	Accrued expenses	$	112	$	98
Derivatives Not Designated as Hedging Instruments:
Economic hedge forward contracts	Prepaid expenses and other current assets	$	—	$	6	Accrued expenses	$	—	$	24

The table below details the gross activity for all derivative assets and liabilities which were presented on a net basis on the Consolidated Balance Sheets due to the right of offset with one counterparty (in thousands):

Asset Derivatives						Liability Derivatives
	March 30, 2014			December 31, 2013			March 30, 2014			December 31, 2013
Gross amounts of recognized assets	$	38		$	210	Gross amounts of recognized liabilities	$	128		$	122
Gross amounts offset	(5		)	—		Gross amounts offset	(16		)	—
Net amount of assets presented	33			210		Net amount of liabilities presented	112			122

Information regarding the effect of derivative instruments, net of the underlying exposure, on the consolidated financial statements was as follows (in thousands):

	Location in Financial Statements	Three-months Ended
		March 30, 2014			March 31, 2013
Derivatives Designated as Hedging Instruments:
Gains (losses) in Shareholders' equity on derivatives (effective portion)	Accumulated other comprehensive income (loss), net of tax	$	(62	)	$	—
Gains (losses) reclassified from accumulated other comprehensive income (loss) into net income (effective portion)	Product revenue	$	13		$	—
	Research, development, and engineering expenses	(30		)	—
	Selling, general, and administrative expenses	(16		)	—
	Total gains (losses) reclassified from accumulated other comprehensive income (loss) into net income	$	(33	)	$	—
Gains (losses) recognized in net income on derivatives (ineffective portion and discontinued derivatives)	Foreign currency gain (loss)	$	—		$	—
Derivatives Not Designated as Hedging Instruments:
Gains (losses) recognized in net income	Foreign currency gain (loss)	$	(152	)	$	203

The following table provides the changes in accumulated other comprehensive income (loss), net of tax, related to derivative instruments (in thousands):

	Three-months ended
	March 30, 2014			March 31, 2013
Beginning balance	$	104		$	—
Amount of loss (gain) reclassified to net income	33			—
Change in fair value of derivative instruments	(199		)	—
Ending balance	$	(62	)	$	—

Net losses expected to be reclassified from accumulated other comprehensive income (loss), net of tax, into net income within the next twelve months are $66,000.