10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

___________________________________________ 

FORM 10-Q

___________________________________________ 

x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended April 30, 2013

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 No. 1-34795

 ___________________________________________ 

MENTOR GRAPHICS CORPORATION

(Exact name of registrant as specified in its charter)

___________________________________________ 

Oregon	93-0786033
(State or other jurisdiction of incorporation or organization)	(IRS Employer Identification No.)
8005 SW Boeckman Road, Wilsonville, Oregon	97070-7777
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (503) 685-7000

None

(Former name, former address and former

fiscal year, if changed since last report)

___________________________________________ 

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 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 definition 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  o    Non-accelerated filer  o    Smaller reporting company  o
	(Do not check if a 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

Number of shares of common stock, no par value, outstanding as of 6/3/2013: 112,862,762

MENTOR GRAPHICS CORPORATION

Index to Form 10-Q

		Page Number
PART I. FINANCIAL INFORMATION
Item 1.	Financial Statements (unaudited)
	Condensed Consolidated Statements of Income for the three months ended April 30, 2013 and 2012	3
	Condensed Consolidated Statements of Comprehensive Income (Loss) for the three months ended April 30, 2013 and 2012	4
	Condensed Consolidated Balance Sheets as of April 30, 2013 and January 31, 2013	5
	Condensed Consolidated Statements of Cash Flows for the three months ended April 30, 2013 and 2012	6
	Notes to Condensed Consolidated Financial Statements	7
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	17
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	26
Item 4.	Controls and Procedures	29
PART II. OTHER INFORMATION
Item 1.	Legal Proceedings	30
Item 1A.	Risk Factors	30
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	38
Item 6.	Exhibits	39
SIGNATURES		40

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PART I. FINANCIAL INFORMATION

Item 1. Financial Statements

Mentor Graphics Corporation

Condensed Consolidated Statements of Income

(Unaudited)

Three months ended April 30,	2013			2012
In thousands, except per share data
Revenues:
System and software	$	123,284		$	149,356
Service and support	103,231			98,562
Total revenues	226,515			247,918
Cost of revenues:
System and software	8,899			14,790
Service and support	30,075			28,414
Amortization of purchased technology	1,207			2,179
Total cost of revenues	40,181			45,383
Gross profit	186,334			202,535
Operating expenses:
Research and development	79,717			71,046
Marketing and selling	79,107			79,752
General and administration	18,277			16,649
Equity in earnings of Frontline	(397		)	(587		)
Amortization of intangible assets	1,654			1,706
Special charges	2,083			1,147
Total operating expenses	180,441			169,713
Operating income	5,893			32,822
Other income (expense), net	(959		)	83
Interest expense	(4,785		)	(4,594		)
Income before income tax	149			28,311
Income tax expense	568			781
Net income (loss)	(419		)	27,530
Less: Loss attributable to noncontrolling interest	(624		)	(652		)
Net income attributable to Mentor Graphics shareholders	$	205		$	28,182
Net income per share:
Basic	$	0.01		$	0.26
Diluted	$	0.01		$	0.25
Weighted average number of shares outstanding:
Basic	112,711			109,907
Diluted	115,751			113,243
Cash dividends declared per common share	$	0.045		$	—

See accompanying notes to unaudited condensed consolidated financial statements.

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Mentor Graphics Corporation

Condensed Consolidated Statements of Comprehensive Income (Loss)

(Unaudited)

Three months ended April 30,	2013			2012
In thousands
Net income (loss)	$	(419	)	$	27,530
Other comprehensive income (loss), net of tax:
Cash flow hedges:
Change in unrealized gain (loss) on derivative instruments	(255		)	800
Less: reclassification adjustment for net gain (loss) included in net income	(244		)	347
Net change	(11		)	453
Change in accumulated translation adjustment	(5,317		)	(781		)
Change in pension liability	(2		)	(3		)
Comprehensive income (loss)	(5,749		)	27,199
Less amounts attributable to the noncontrolling interest:
Net loss	(624		)	(652		)
Change in accumulated translation adjustment	43			(21		)
Comprehensive loss attributable to the noncontrolling interest	(581		)	(673		)
Comprehensive income (loss) attributable to Mentor Graphics shareholders	$	(5,168	)	$	27,872

See accompanying notes to unaudited condensed consolidated financial statements.

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Mentor Graphics Corporation

Condensed Consolidated Balance Sheets

(Unaudited)

As of	April 30, 2013		January 31, 2013
In thousands
Assets
Current assets:
Cash and cash equivalents	$	198,380	$	223,783
Short-term investments	7,833		—
Trade accounts receivable, net of allowance for doubtful accounts of $4,752 as of April 30, 2013 and $5,331 as of January 31, 2013	367,389		412,245
Other receivables	9,446		10,974
Inventory	24,141		18,036
Prepaid expenses and other	28,198		24,941
Deferred income taxes	9,538		14,973
Total current assets	644,925		704,952
Property, plant, and equipment, net of accumulated depreciation of $305,768 as of April 30, 2013 and $300,914 as of January 31, 2013	160,192		162,402
Term receivables	228,425		250,497
Goodwill	537,357		535,932
Intangible assets, net of accumulated amortization of $188,794 as of April 30, 2013 and $186,060 as of January 31, 2013	20,075		21,838
Other assets	72,298		69,663
Total assets	$	1,663,272	$	1,745,284
Liabilities and Stockholders’ Equity
Current liabilities:
Short-term borrowings	$	1,060	$	5,964
Accounts payable	14,753		20,906
Income taxes payable	4,238		9,180
Accrued payroll and related liabilities	56,502		101,354
Accrued and other liabilities	36,729		40,662
Deferred revenue	234,041		233,759
Total current liabilities	347,323		411,825
Notes payable	219,937		218,546
Deferred revenue	16,064		17,755
Income tax liability	22,770		22,663
Other long-term liabilities	25,636		28,318
Total liabilities	631,730		699,107
Commitments and contingencies (Note 7)
Noncontrolling interest with redemption feature	11,649		12,698
Stockholders’ equity:
Common stock, no par value, 300,000 shares authorized as of April 30, 2013 and January 31, 2013; 112,599 shares issued and outstanding as of April 30, 2013 and 112,902 shares issued and outstanding as of January 31, 2013	807,080		810,902
Retained earnings	192,787		197,178
Accumulated other comprehensive income	20,026		25,399
Total stockholders’ equity	1,019,893		1,033,479
Total liabilities and stockholders’ equity	$	1,663,272	$	1,745,284

See accompanying notes to unaudited condensed consolidated financial statements.

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Mentor Graphics Corporation

Condensed Consolidated Statements of Cash Flows

(Unaudited)

Three months ended April 30,	2013			2012
In thousands
Operating Cash Flows:
Net (loss) income	$	(419	)	$	27,530
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization of property, plant, and equipment	8,790			8,331
Amortization of intangible assets and debt costs	4,554			5,482
Stock-based compensation	6,566			5,147
Deferred income taxes	5,104			837
Changes in other long-term liabilities	(1,890		)	348
Dividends received from unconsolidated entities, net of equity in income	1,052			350
Other	(22		)	18
Changes in operating assets and liabilities, net of effect of acquired businesses:
Trade accounts receivable, net	42,176			90
Prepaid expenses and other	(14,813		)	(2,047		)
Term receivables, long-term	20,266			7,710
Accounts payable and accrued liabilities	(54,472		)	(60,066		)
Income taxes payable	(4,792		)	(1,996		)
Deferred revenue	27			14,411
Net cash provided by operating activities	12,127			6,145
Investing Cash Flows:
Purchases of short-term investments	(7,820		)	—
Purchases of property, plant, and equipment	(4,410		)	(11,604		)
Acquisitions of businesses and equity interests, net of cash acquired	(2,928		)	(453		)
Net cash used in investing activities	(15,158		)	(12,057		)
Financing Cash Flows:
Proceeds from issuance of common stock	9,609			3,567
Repurchase of common stock	(19,995		)	—
Tax benefit from share options exercised	—			139
Dividends paid	(5,064		)	—
Net decrease in short-term borrowings	(4,827		)	(6,069		)
Repayments of other borrowings	(1,131		)	(1,871		)
Net cash used in financing activities	(21,408		)	(4,234		)
Effect of exchange rate changes on cash and cash equivalents	(964		)	(1,542		)
Net change in cash and cash equivalents	(25,403		)	(11,688		)
Cash and cash equivalents at the beginning of the period	223,783			146,499
Cash and cash equivalents at the end of the period	$	198,380		$	134,811

See accompanying notes to unaudited condensed consolidated financial statements.

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Mentor Graphics Corporation

Notes to Unaudited Condensed Consolidated Financial Statements

All numerical dollar and share references are in thousands, except for per share data.

(1)General—The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with United States (U.S.) generally accepted accounting principles (GAAP) and reflect all material normal recurring adjustments. However, certain information and footnote disclosures normally included in consolidated financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). In the opinion of management, the condensed consolidated financial statements include adjustments necessary for a fair presentation of the results of the interim periods presented. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and the notes included in our Annual Report on Form 10-K for the fiscal year ended January 31, 2013.

The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, and contingencies as of the date of the financial statements, and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from these estimates. Any changes in estimates will be reflected in the financial statements in future periods.

The condensed consolidated financial statements include our financial statements and those of our wholly-owned and majority-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.

(2)Recent Accounting Pronouncements—In February 2013, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2013-02, "Comprehensive Income (Topic 220) Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income," to improve the reporting of reclassifications out of accumulated other comprehensive income (AOCI), which clarified the reclassification requirements of ASU 2011-05, "Comprehensive Income (Topic 220) Presentation of Comprehensive Income." This new guidance requires entities to present (either on the face of the income statement or in the notes) significant amounts reclassified out of AOCI and their effect on income statement line items. This guidance is effective for interim and annual reporting periods beginning after December 15, 2012. The Company adopted this guidance on February 1, 2013 and has made the required additional disclosures.

In December 2011, the FASB issued ASU 2011-11, “Balance Sheet (Topic 210) Disclosures about Offsetting Assets and Liabilities.” ASU 2011-11 requires entities to disclose both gross information and net information about both instruments and transactions subject to a master netting arrangement. ASU 2011-11 is intended to facilitate comparison between those entities that prepare their financial statements on the basis of U.S. GAAP and those entities that prepare their financial statements on the basis of International Financial Reporting Standards. We adopted this new guidance beginning February 1, 2013. Adoption of this new guidance did not have a material impact on our financial statements.

(3)Fair Value Measurement— The following table presents information about financial assets and liabilities measured at fair value on a recurring basis as of April 30, 2013:

	Fair Value			Level 1		Level 2		Level 3
Bank certificates of deposit	$	7,833		$	—	$	7,833	$	—
Contingent consideration	(4,340		)	—		—		(4,340		)
Total	$	3,493		$	—	$	7,833	$	(4,340	)

The following table presents information about financial assets and liabilities measured at fair value on a recurring basis as of January 31, 2013:

	Fair Value			Level 1		Level 2		Level 3
Contingent consideration	$	(6,016	)	$	—	$	—	$	(6,016	)

The FASB's authoritative guidance for the hierarchy of valuation techniques is based on whether the inputs to those valuation techniques are observable or unobservable. Observable inputs reflect market data obtained from independent sources. Unobservable inputs reflect our market assumptions. The fair value hierarchy consists of the following three levels:

•Level 1—Quoted prices for identical instruments in active markets;

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• Level 2—Quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-derived valuations whose significant inputs are observable; and

•Level 3—One or more significant inputs to the valuation model are unobservable.

We based the fair value of bank certificates of deposit included in short-term investments on quoted market prices for similar instruments in markets that are not active (Level 2).

In connection with certain acquisitions, payment of a portion of the purchase price is contingent typically upon the acquired business’ achievement of certain revenue goals. As of April 30, 2013, of the total recorded balance, $1,540 was included in accrued and other liabilities and $2,800 was included in other long-term liabilities on our condensed consolidated balance sheet. As of January 31, 2013, of the total recorded balance, $1,197 was included in accrued and other liabilities and $4,819 was included in other long-term liabilities on our condensed consolidated balance sheet.

We have estimated the fair value of our contingent consideration as the present value of the expected payments over the term of the arrangements. The fair value measurement of our contingent consideration as of April 30, 2013 encompasses the following significant unobservable inputs:

Unobservable Inputs	Range
Total estimated contingent consideration	$0	-	$5,733
Discount rate	14%	-	16%
Timing of cash flows (in years)	0	-	5

Changes in the fair value of our contingent consideration are primarily driven by changes in the estimated amount and timing of payments, resulting from changes in the forecasted revenues of the acquired businesses. Significant changes in any of the inputs in isolation could result in a fluctuation in the fair value measurement of contingent consideration. Changes in fair value are recognized in special charges in our condensed consolidated statement of income in the period in which the change is identified.

The following table summarizes contingent consideration activity:

Balance as of January 31, 2013	$	6,016
Payments	(1,131		)
Adjustments	(603		)
Interest accretion	58
Balance as of April 30, 2013	$	4,340

The following table summarizes the fair value and carrying value of notes payable:

As of	April 30, 2013		January 31, 2013
Fair value of notes payable	$	300,438	$	293,867
Carrying value of notes payable	$	219,937	$	218,546

We based the fair value of notes payable on the quoted market price or rates available to us for instruments with similar terms and maturities (Level 2). Of the total carrying value of notes payable, there was none classified as current on our condensed consolidated balance sheet as of April 30, 2013 and January 31, 2013.

The carrying amounts of cash equivalents, trade accounts receivable, net, term receivables, short-term borrowings, accounts payable, and accrued liabilities approximate fair value because of the short-term nature of these instruments or because amounts have been appropriately discounted.

(4)Term Receivables and Trade Accounts Receivable—We have long-term installment receivables that are attributable to multi-year, multi-element term license sales agreements. We include balances under term agreements that are due within one year in trade accounts receivable, net and balances that are due more than one year from the balance sheet date in term

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receivables, long-term. We discount the total product portion of the agreements to reflect the interest component of the transaction. We amortize the interest component of the transaction, using the effective interest method, to system and software revenues over the period in which payments are made and balances are outstanding. We determine the discount rate at the outset of the arrangement based upon the current credit rating of the customer. We reset the discount rate periodically considering changes in prevailing interest rates but do not adjust previously discounted balances.

Term receivable and trade accounts receivable balances were as follows:

As of	April 30, 2013		January 31, 2013
Trade accounts receivable	$	125,969	$	178,351
Term receivables, short-term	$	241,420	$	233,894
Term receivables, long-term	$	228,425	$	250,497

Trade accounts receivable include billed amounts whereas term receivables, short-term are comprised of unbilled amounts. Term receivables, short-term represent the portion of long-term installment agreements that are due within one year. Billings for term agreements typically occur 30 days prior to the contractual due date, in accordance with individual contract installment terms. Term receivables, long-term represent unbilled amounts which are scheduled to be collected beyond one year.

We perform a credit risk assessment of all customers using the Standard & Poor’s (S&P) credit rating as our primary credit-quality indicator. The S&P credit ratings are based on the most recent S&P score available. For customers that do not have an S&P credit rating, we base our credit risk assessment on an internal credit assessment which is based on selected short-term financial ratios. Our internal credit assessment is based upon results provided in the customers’ most recent financial statements. We determine whether or not to extend credit to these customers based on the results of our internal credit assessment, thus, mitigating our risk of loss.

The credit risk assessment for our long-term receivables was as follows:

As of	April 30, 2013		January 31, 2013
S&P credit rating:
AAA+ through BBB-	$	131,007	$	133,773
BB+ and lower	35,275		45,298
	166,282		179,071
Internal credit assessment	62,143		71,426
Total long-term term receivables	$	228,425	$	250,497

We maintain allowances for doubtful accounts on trade accounts receivable and term receivables for estimated losses resulting from the inability of our customers to make required payments. We regularly evaluate the collectibility of our trade accounts receivable based on a combination of factors. When we become aware of a specific customer’s inability to meet its financial obligations, such as in the case of bankruptcy or deterioration in the customer’s operating results, financial position, or credit rating, we record a specific reserve for bad debt to reduce the related receivable to the amount believed to be collectible. We also record unspecified reserves for bad debt for all other customers based on a variety of factors including length of time the receivables are past due, the financial health of the customers, the current business environment, and historical experience. Current economic conditions we consider include forecasted spending in the semiconductor industry, consumer spending for electronics, integrated circuit research and development spending, and volatility in gross domestic product. If these factors change or circumstances related to specific customers change, we adjust the estimates of the recoverability of receivables resulting in either additional selling expense or a reduction in selling expense in the period such determination is made.

The following shows the change in allowance for doubtful accounts:

Allowance for doubtful accounts	Beginning balance		Expense adjustment			Other deductions(1)			Ending balance
Three months ended April 30, 2013	$	5,331	$	(500	)	$	(79	)	$	4,752
Three months ended April 30, 2012	$	4,432	$	153		$	(48	)	$	4,537

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(1)Specific account write-offs and foreign exchange.

We enter into agreements to sell qualifying accounts receivable from time to time to certain financing institutions on a non-recourse basis. We received net proceeds from the sale of receivables of $8,535 for the three months ended April 30, 2013 compared to $7,457 for the three months ended April 30, 2012. Amounts collected from customers on accounts receivable previously sold on a non-recourse basis to financial institutions are included in short-term borrowings on the balance sheet. These amounts are remitted to the financial institutions in the month following quarter-end.

(5)Short-Term Borrowings—In April 2011, we entered into a syndicated, senior, unsecured, four-year revolving credit facility that was originally scheduled to terminate on April 27, 2015. On May 24, 2013, we amended the facility to, among other things, extend the termination date to May 24, 2017.

The revolving credit facility has a maximum borrowing capacity of $125,000. Under the amendment, we have the option to pay interest based on:

(i) London Interbank Offered Rate (LIBOR) with varying maturities commensurate with the borrowing period we select, plus a spread of between 2.00% and 2.50% based on a pricing grid tied to a financial covenant; or

(ii) A base rate plus a spread of between 1.00% and 1.50%, based on a pricing grid tied to a financial covenant.

As a result of these interest rate options, our interest expense associated with borrowings under this revolving credit facility will vary with market interest rates. In addition, commitment fees are payable on the unused portion of the revolving credit facility at rates between 0.30% and 0.40% based on a pricing grid tied to a financial covenant. We had no borrowings against the revolving credit facility during the three months ended April 30, 2013 and 2012.

This revolving credit facility contains certain financial and other covenants, including a limit on the aggregate amount we can pay for dividends and repurchases of our stock over the term of the facility of $50,000 plus 70% of our cumulative net income.

We were in compliance with all financial covenants as of April 30, 2013. If we fail to comply with the financial covenants and do not obtain a waiver from our lenders, we would be in default under the revolving credit facility and our lenders could terminate the facility and demand immediate repayment of all outstanding loans under the revolving credit facility.

(6)Notes Payable——In April 2011, we issued $253,000 of 4.00% Convertible Subordinated Debentures (4.00% Debentures) due 2031 in a private placement pursuant to the SEC Rule 144A under the Securities Act of 1933. Interest on the 4.00% Debentures is payable semi-annually in April and October.

The 4.00% Debentures are convertible, under certain circumstances, into our common stock at a conversion price of $20.538 per share for a total of 12,319 shares as of April 30, 2013. These circumstances include:

• The market price of our common stock exceeding 120% of the conversion price;

• A call for redemption of the 4.00% Debentures;

• Specified distributions to holders of our common stock;

• If a fundamental change, such as a change of control, occurs;

• During the two months prior to, but not on, the maturity date; or

• The market price of the 4.00% Debentures declining to less than 98% of the value of the common stock into which the 4.00% Debentures are convertible.

Upon conversion of any 4.00% Debentures, a holder will receive:

(i) Cash up to the principal amount of the 4.00% Debentures that are converted; and

(ii) Cash or shares of common stock, at our election, for the excess, if any, of the value of the converted shares over the principal amount.

If a holder elects to convert their 4.00% Debentures in connection with a fundamental change in the company that occurs prior to April 5, 2016, the holder will also be entitled to receive a make whole premium upon conversion in some circumstances.

We may redeem some or all of the 4.00% Debentures for cash on or after April 5, 2016 at the following redemption prices expressed as a percentage of principal, plus any accrued and unpaid interest:

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Period	Redemption Price
Beginning on April 5, 2016 and ending on March 31, 2017	101.143	%
Beginning on April 1, 2017 and ending on March 31, 2018	100.571	%
On April 1, 2018 and thereafter	100.000	%

The holders, at their option, may redeem the 4.00% Debentures in whole or in part for cash on April 1, 2018, April 1, 2021, and April 1, 2026, and in the event of a fundamental change in the company. In each case, our repurchase price will be 100% of the principal amount of the 4.00% Debentures plus any accrued and unpaid interest.

The 4.00% Debentures contain a conversion feature that the debt may be settled in cash upon conversion, therefore we separately account for the implied liability and equity components of the 4.00% Debentures. The principal amount, unamortized debt discount, net carrying amount of the liability component, and carrying amount of the equity component of the 4.00% Debentures are as follows:

As of	April 30, 2013			January 31, 2013
Principal amount	$	253,000		$	253,000
Unamortized debt discount	(33,063		)	(34,454		)
Net carrying amount of the liability component	$	219,937		$	218,546
Equity component	$	43,930		$	43,930

The unamortized debt discount is amortizing to interest expense using the effective interest method through March 2018.

We recognized the following amounts in interest expense in the condensed consolidated statement of income related to the 4.00% Debentures:

Three months ended April 30,	2013		2012
Interest expense at the contractual interest rate	$	2,530	$	2,530
Amortization of debt discount	$	1,391	$	1,295

The effective interest rate on the 4.00% Debentures was 7.25% for the three months ended April 30, 2013 and 2012.

(7) Commitments and Contingencies

Indemnifications

Our license and services agreements generally include a limited indemnification provision for claims from third parties relating to our intellectual property. The indemnification is generally limited to the amount paid by the customer, a multiple of the amount paid by the customer, or a set cap. As of April 30, 2013, we were not aware of any material liabilities arising from these indemnification obligations.

Legal Proceedings

From time to time we are involved in various disputes and litigation matters that arise in the ordinary course of business. These include disputes and lawsuits relating to intellectual property rights, contracts, distributorships, and employee relations matters. Periodically, we review the status of various disputes and litigation matters and assess our potential exposure. When we consider the potential loss from any dispute or legal matter probable and the amount or the range of loss can be estimated, we will accrue a liability for the estimated loss. Legal proceedings are subject to uncertainties, and the outcomes are difficult to predict. Because of such uncertainties, we base accruals on the best information available at the time. As additional information becomes available, we reassess the potential liability related to pending claims and litigation matters and may revise estimates. We believe that the outcome of current litigation, individually and in the aggregate, will not have a material effect on our results of operations.

In some instances, we are unable to reasonably estimate any potential loss or range of loss. The nature and progression of litigation can make it difficult to predict the impact a particular lawsuit will have. There are many reasons that we cannot make these assessments, including, among others, one or more of the following: the early stages of a proceeding; damages sought

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that are unspecific, unsupportable, unexplained or uncertain; discovery not having been started or incomplete; the complexity of the facts that are in dispute; the difficulty of assessing novel claims; the parties not having engaged in any meaningful settlement discussions; the possibility that other parties may share in any ultimate liability; and/or the often slow pace of litigation.

(8) Stock-Based Compensation and Stockholders Equity

Stock Options Plans and Stock Plans

Our 2010 Omnibus Incentive Plan (Incentive Plan) is administered by the Compensation Committee of our Board of Directors and permits accelerated vesting of outstanding options, restricted stock units, restricted stock awards, and other equity incentives upon the occurrence of certain changes in control of our company. Stock options and restricted stock units under the Incentive Plan are generally expected to vest over four years. Stock options have an expiration date of ten years from the date of grant and an exercise price no less than the fair market value of the shares on the date of grant.

Employee Stock Purchase Plans

We have an employee stock purchase plan (ESPP) for U.S. employees and an ESPP for certain foreign subsidiary employees. The ESPPs provide for six-month offerings commencing on January 1 and July 1 of each year with purchases on June 30 and December 31 of each year. Each eligible employee may purchase up to six thousand shares of stock on each purchase date (subject to a plan limit on the total fair market value) at prices no less than 85% of the lesser of the fair market value of the shares on the offering date or on the purchase date.

Stock-Based Compensation Expense

The following table summarizes stock-based compensation expense recognized:

Three months ended April 30,	2013		2012
Cost of revenues	$	460	$	319
Operating expenses:
Research and development	2,610		2,117
Marketing and selling	1,882		1,549
General and administration	1,614		1,162
Equity plan-related compensation expense	$	6,566	$	5,147

Dividends

On March 7, 2013, the Board of Directors announced the adoption of a dividend policy under which we intend to pay an annual cash dividend of $0.18 per share of common stock. The initial quarterly dividend of $0.045 per share of outstanding common stock for a total of $5,064 was paid on April 10, 2013 to shareholders of record as of the close of business on March 22, 2013. On May 23, 2013, we announced a quarterly dividend of $0.045 per share on outstanding common stock, payable on July 1, 2013 to shareholders of record as of the close of business on June 10, 2013. Future declarations of quarterly dividends and the establishment of future record and payment dates are subject to the quarterly determination of our Board of Directors.

(9)Incentive Stock Rights—Our Board of Directors has the authority to issue incentive stock in one or more series and to determine the relative rights and preferences of the incentive stock. On June 24, 2010, we adopted an Incentive Stock Purchase Rights Plan and declared a dividend distribution of one right for each outstanding share of common stock, payable to holders of record on July 6, 2010. On December 23, 2011, our Board of Directors amended the Stock Purchase Rights Plan to, among other things, extend the expiration date of the rights and increase the exercise price of each right. As long as the rights are attached to our common stock, we will issue one right with each new share of common stock so that all such shares will have attached rights. Under certain conditions, each right may be exercised to purchase 1/10,000 of a share of Series B Junior Participating Incentive Stock at a purchase price of sixty-five dollars, subject to adjustment. The rights are not presently exercisable and will only become exercisable if a person or group acquires or commences a tender offer to acquire 15% or more of our common stock.

If a person or group acquires 15% or more of our common stock, each right will be adjusted to entitle its holder to receive, upon exercise, common stock (or, in certain circumstances, other assets of ours) having a value equal to two times the exercise

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price of the right, or each right will be adjusted to entitle its holder to receive, upon exercise, common stock of the acquiring company having a value equal to two times the exercise price of the right, depending on the circumstances. The rights expire on June 30, 2013 and may be redeemed by us for $0.001 per right. The rights do not have voting or dividend rights and have no dilutive effect on our earnings.

(10)Net Income Per Share—We compute basic net income per share using the weighted average number of common shares outstanding during the period. We compute diluted net income per share using the weighted average number of common shares and potentially dilutive common shares outstanding during the period. Potentially dilutive common shares consist of common shares issuable upon vesting of restricted stock units, common shares issuable upon exercise of stock options, and purchase rights from ESPPs using the treasury stock method, and common shares issuable upon conversion of the convertible subordinated debentures, if dilutive.

The following provides the computation of basic and diluted net income per share:

Three months ended April 30,	2013		2012
Net income attributable to Mentor Graphics shareholders	$	205	$	28,182
Noncontrolling interest adjustment to redemption value	468		—
Adjusted net income attributable to Mentor Graphics shareholders	$	673	$	28,182
Weighted average common shares used to calculate basic net income per share	112,711		109,907
Employee stock options, restricted stock units, and employee stock purchase plan	3,040		3,336
Weighted average common and potential common shares used to calculate diluted net income per share	115,751		113,243
Net income per share attributable to Mentor Graphics shareholders:
Basic	$	0.01	$	0.26
Diluted	$	0.01	$	0.25

We excluded from the computation of diluted net income per share stock options and ESPP purchase rights to purchase 1,188 shares of common stock for the three months ended April 30, 2013 compared to 3,022 for the three months ended April 30, 2012. These stock options and ESPP purchase rights were determined to be anti-dilutive as a result of applying the treasury stock method.

We have increased the numerator of our basic and diluted earnings per share calculation by $468 for the three months ended April 30, 2013 for the adjustment to decrease the noncontrolling interest with redemption feature to its calculated redemption value at April 30, 2013, recorded directly to retained earnings. For the three months ended April 30, 2012, we excluded a similar adjustment from the calculation of basic and diluted earnings per share, as the amount was not significant.

We assume that the 4.00% Debentures will be settled in common stock for purposes of calculating the dilutive effect of the 4.00% Debentures. The effect of the assumed conversion of the 4.00% Debentures was anti-dilutive and therefore excluded from the computation of diluted net income per share.

The conversion features of the 4.00% Debentures, which allow for settlement in cash or a combination of cash and common stock, are further described in Note 6. “Notes Payable.”

(11)Accumulated Other Comprehensive Income—The following table summarizes the components of accumulated other comprehensive income:

As of	April 30, 2013			January 31, 2013
Foreign currency translation adjustment	$	19,786		$	25,146
Unrealized loss on derivatives	(23		)	(12		)
Pension liability	263			265
Total accumulated other comprehensive income	$	20,026		$	25,399

(12) Special Charges—The following is a summary of the components of special charges:

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Three months ended April 30,	2013		2012
Employee severance and related costs	$	2,079	$	988
Other costs, net	4		159
Total special charges	$	2,083	$	1,147

Special charges primarily consist of costs incurred for employee terminations due to a reduction of personnel resources driven by modifications of business strategy or business emphasis. Employee severance and related costs include severance benefits, notice pay, and outplacement services. These rebalance charges generally represent the aggregate of numerous unrelated rebalance plans which impact several employee groups, none of which is individually material to our financial position or results of operations. We determine termination benefits based on employee status, years of service, and local statutory requirements. We communicate termination benefits to the affected employees prior to the end of the quarter in which we record the charge. Special charges may also include expenses incurred related to acquisitions, excess facility costs, and asset related charges.

Approximately 26% of the employee severance and related costs for the three months ended April 30, 2013 were paid during the period. We expect to pay the remainder during the fiscal year ending January 31, 2014. Substantially all of the employee severance and related costs for the three months ended April 30, 2012 were paid during the fiscal year ending January 31, 2013. There have been no significant modifications to the amount of these charges.

Accrued special charges are included in accrued and other liabilities and other long-term liabilities in the condensed consolidated balance sheets. The following table shows changes in accrued special charges during the three months ended April 30, 2013:

	Accrued special charges as of		Charges during the three months ended		Adjustments (payments) during the three months ended			Accrued special charges as of
	January 31, 2013		April 30, 2013		April 30, 2013			April 30, 2013		(1	)
Employee severance and related costs	$	2,028	$	2,079	$	(2,119	)	$	1,988
Other costs, net	2,889		4		244			3,137
Total accrued special charges	$	4,917	$	2,083	$	(1,875	)	$	5,125

⁽¹⁾  Of the $5,125 total accrued special charges as of April 30, 2013, $2,110 represents the long-term portion, which primarily includes accrued lease termination fees and other facility costs, net of sublease income and other long-term costs. The remaining balance of $3,015 represents the short-term portion of accrued special charges.

(13) Other Income (Expense), Net—Other income (expense), net was comprised of the following:

Three months ended April 30,	2013			2012
Interest income	$	625		$	475
Foreign currency exchange loss	(1,375		)	(215		)
Other, net	(209		)	(177		)
Other income (expense), net	$	(959	)	$	83

(14)Related Party Transactions—Certain members of our Board of Directors also serve on the board of directors for some of our customers. Management believes the transactions between these customers and us were carried out on an arm’s-length basis. As of April 30, 2013, we had amounts receivable from these customers of $76,880. As of January 31, 2013, amounts receivable from these customers were not significant. The following table shows revenue recognized from these customers:

Three months ended April 30,	2013			2012
Revenues from customers	$	28,536		$	9,002
Percentage of total revenues	12.6		%	3.6		%

(15) Income Taxes—The provision for income taxes was comprised of the following:

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Three months ended April 30,	2013			2012
Income tax expense	$	568		$	781
Effective tax rate	381		%	3		%

Generally, the provision for income taxes is the result of the mix of profits and losses earned in various tax jurisdictions with a broad range of income tax rates, withholding taxes, changes in tax reserves, and the application of valuation allowances on deferred tax assets. Accounting guidance requires for interim reporting that we evaluate our provision for income tax expense (benefit) based on our projected results of operations for the full year, and record adjustments in each quarter. Such adjustments consider period specific items and a separate determination of tax expense for entities in our consolidated group that are projected to have losses for which no tax benefit will be recognized.

Our effective tax rate is 381% for the three months ended April 30, 2013, after the inclusion of $360 in net unfavorable period specific items. The period specific items primarily relate to additions to and additional interest on liabilities for uncertain tax positions. For our full year forecast, we have projected a 13% effective tax rate. This rate is inclusive of period specific items recognized through April 30, 2013. Our projected rate for the full year differs from tax computed at the U.S. federal statutory rate of 35% primarily due to:

•The benefit of lower tax rates on earnings of foreign subsidiaries;

•Forecasted utilization of net operating loss carryforwards for which no previous benefit was recognized; and

•The application of tax incentives for research and development.

These differences are partially offset by:

•Additions to reserves for uncertain tax positions;

• Repatriation of foreign subsidiary earnings to the U.S.;

•Non-deductible equity compensation expense; and

•Withholding taxes.

Actual results may differ significantly from our current projections. Further, our effective tax rate could fluctuate considerably on a quarterly basis, and could be significantly affected to the extent our actual mix of earnings among individual jurisdictions is different than our expectations.

We determine deferred tax assets and liabilities based on differences between the financial reporting and tax basis of assets and liabilities. In addition, we record deferred tax assets for net operating loss carryforwards and tax credit carryforwards. We calculate the deferred tax assets and liabilities using the enacted tax rates and laws that will be in effect when we expect the differences to reverse. A valuation allowance is recorded when it is more likely than not that all or some portion of the

deferred tax asset will not be realized. Since 2004, we have determined it is uncertain whether our U.S. entity will generate sufficient taxable income and foreign source income to fully utilize net operating loss carryforwards, research and experimentation credit carryforwards, and foreign tax credit carryforwards before expiration. Accordingly, we recorded a valuation allowance against those deferred tax assets for which realization does not meet the more likely than not standard. We have established valuation allowances related to certain foreign deferred tax assets based on historical losses as well as future expectations in certain jurisdictions. We will continue to evaluate the realizability of the deferred tax assets on a periodic basis.

As of April 30, 2013, we had a liability of $28,305 for income taxes associated with uncertain income tax positions. Of this liability, $5,535 was classified as short-term liabilities in our condensed consolidated balance sheet as we generally anticipate the settlement of such liabilities will require payment of cash within the next twelve months. The remaining $22,770 of income tax associated with uncertain tax positions was classified as long-term liabilities. Certain liabilities may result in the reduction of deferred tax assets rather than settlement in cash. We are not able to reasonably estimate the timing of any cash payments required to settle the long-term liabilities and do not believe that the ultimate settlement of these liabilities will materially affect our liquidity.

(16)Supplemental Cash Flow Information—The following provides information concerning supplemental disclosures of cash flow activities:

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Three months ended April 30,	2013		2012
Cash paid, net for:
Interest	$	5,551	$	5,400
Income taxes	$	4,055	$	2,723

We have an investment in Frontline PCB Solutions Limited Partnership (Frontline). We received returns on investment from Frontline of $1,500 during the three months ended April 30, 2013 and $950 during the three months ended April 30, 2012, which is included in net cash provided by operating activities in our condensed consolidated statement of cash flows.

(17)Segment Reporting—Our Chief Operating Decision Makers (CODMs), which consist of the Chief Executive Officer and the President, review our consolidated results within one operating segment. In making operating decisions, our CODMs primarily consider consolidated financial information accompanied by disaggregated revenue information by geographic region.

We eliminate all intercompany revenues in computing revenues by geographic regions. Revenues related to operations in the geographic regions were:

Three months ended April 30,	2013		2012
Revenues:
North America	$	99,140	$	129,110
Europe	48,707		52,631
Japan	26,677		24,983
Pacific Rim	51,991		41,194
Total revenues	$	226,515	$	247,918

For the three months ended April 30, 2013, no single customer accounted for 10% or more of our total revenues. For the three months ended April 30, 2012, one customer accounted for 20% of our total revenues.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

Unless otherwise indicated, numerical references are in millions, except for percentages and per share data.

Overview

The following discussion should be read in conjunction with the condensed consolidated financial statements and notes included elsewhere in this Form 10-Q. Certain of the statements below contain forward-looking statements. These statements are predictions based upon our current expectations about future trends and events. Actual results could vary materially as a result of certain factors, including but not limited to, those expressed in these statements. In particular, we refer you to the risks discussed in Part II, Item 1A. “Risk Factors” and in our other Securities and Exchange Commission filings, which identify important risks and uncertainties that could cause our actual results to differ materially from those contained in the forward-looking statements.

We urge you to consider these factors carefully in evaluating the forward-looking statements contained in this Form 10-Q. All subsequent written or spoken forward-looking statements attributable to our company or persons acting on our behalf are expressly qualified in their entirety by these cautionary statements. The forward-looking statements included in this Form 10-Q are made only as of the date of this Form 10-Q. We do not intend, and undertake no obligation, to update these forward-looking statements.

The Company

We are a supplier of electronic design automation (EDA) tools — advanced computer software and emulation hardware systems used to automate the design, analysis, and testing of complex electro-mechanical systems, electronic hardware, and embedded systems software in electronic systems and components. We market our products and services worldwide, primarily to large companies in the military/aerospace, communications, computer, consumer electronics, semiconductor, networking, multimedia, and transportation industries. Through the diversification of our customer base among these various customer markets, we attempt to reduce our exposure to fluctuations within each market. We sell and license our products through our direct sales force and a channel of distributors and sales representatives. In addition to our corporate offices in Wilsonville, Oregon, we have sales, support, software development, and professional service offices worldwide.

We focus on products and design platforms where we have or believe we can attain leading market share. Part of this approach includes developing new applications and exploring new markets where EDA companies have not generally participated. We believe this strategy leads to a more diversified product and customer mix and can help reduce the volatility of our business and our risk as a creditor, while increasing our potential for growth.

We derive system and software revenues primarily from the sale of term software license contracts, which are typically three to four years in length. We generally recognize revenue for these arrangements upon product delivery at the beginning of the license term. Larger enterprise-wide customer contracts, which can represent 50% or more of our system and software revenue, drive the majority of our period-to-period revenue variances. We identify term licenses where collectibility is not probable and recognize revenue on those licenses when cash is received. Ratable license revenues also include short-term term licenses as well as other term licenses where we provide the customer with rights to unspecified or unreleased future products. For these reasons, the timing of large contract renewals, customer circumstances, and license terms are the primary drivers of revenue changes from period to period, with revenue changes also being driven by new contracts and increases in the capacity of existing contracts, to a lesser extent.

The EDA industry is competitive and is characterized by very strong leadership positions in specific segments of the EDA market. These strong leadership positions can be maintained for significant periods of time as the software can be difficult to master and customers are disinclined to make changes once their employees, as well as others in the industry, have developed familiarity with a particular software product. For these reasons, much of our profitability arises from areas in which we are the leader. We will continue our strategy of developing high quality tools with number one market share potential, rather than being a broad-line supplier with undifferentiated product offerings. This strategy allows us to focus investment in areas where customer needs are greatest and where we have the opportunity to build significant market share.

Our products and services are dependent to a large degree on new design projects initiated by customers in the integrated circuit (IC) and electronics system industries. These industries can be cyclical and are subject to constant and rapid technological change, rapid product obsolescence, price erosion, evolving standards, short product life cycles, and wide fluctuations in product supply and demand. Furthermore, extended economic downturns can result in reduced funding for development due to downsizing and other business restructurings. These pressures are offset by the need for the development and introduction of next generation products once an economic recovery occurs.

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Known Trends and Uncertainties Impacting Future Results of Operations

Our revenue has historically fluctuated quarterly and has generally been the highest in the fourth quarter of our fiscal year due to our customers’ corporate calendar year-end spending trends and the timing of contract renewals.

Ten accounts make up approximately 45% of our receivables, including both short and long-term balances. We have not experienced and do not presently expect to experience collection issues with these customers.

Net of reserves, we have no receivables greater than 60 days past due, and continue to experience no difficulty in factoring our high quality receivables.

Bad debt expense recorded for the first three months of fiscal 2014 was not material. However, we do have exposures within our receivables portfolio to customers with weak credit ratings. These receivable balances do not represent a material portion of our portfolio but could have a material adverse effect on earnings in any given quarter, should significant additional allowances for doubtful accounts be necessary.

Bookings during the first three months of fiscal 2014increased by approximately 115% compared to the first three months of fiscal 2013 primarily due to the timing of term license contract renewals. Bookings are the value of executed orders during a period for which revenue has been or will be recognized within six months for software products and within twelve months for emulation hardware systems, professional services, and training. Ten customers accounted for approximately 65% of total bookings for the first three months of fiscal 2014 compared to 35% for the first three months of fiscal 2013. The number of new customers during the first three months of fiscal 2014, excluding PADS (our ready to use printed circuit board design tools) decreased approximately 10% from the level experienced during the first three months of fiscal 2013.

Product Development

During the first three months of fiscal 2014, we continued to execute our strategy of focusing on technical challenges encountered by customers, as well as building upon our well-established product families. We believe that customers, faced with leading-edge design challenges in creating new products, generally choose the best EDA products in each category to build their design environment. Through both internal development and strategic acquisitions, we have focused on areas where we believe we can build a leading market position or extend an existing leading market position.

We believe that the development and commercialization of EDA software tools is generally a three to five year process with limited customer adoption and sales in the first years of tool availability. Once tools are adopted, however, their life spans tend to be long. During the first three months of fiscal 2014, we introduced new products and upgrades to existing products and did not have any significant products reaching the end of their useful economic life.

Critical Accounting Policies

We base our discussion and analysis of our financial condition and results of operations upon our condensed consolidated financial statements which have been prepared in accordance with United States (U.S.) generally accepted accounting principles. The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, and contingencies as of the date of the financial statements and the reported amounts of revenues and expenses during the reporting periods. We evaluate our estimates on an on-going basis. We base our estimates on historical experience, current facts, and on various other assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities and the recording of revenue, costs, and expenses that are not readily apparent from other sources. As future events and their effects cannot be determined with precision, actual results could differ from those estimates.

We believe that the accounting for revenue recognition, valuation of trade accounts receivable, valuation of deferred tax assets, income tax reserves, business combinations, goodwill, intangible assets, long-lived assets, special charges, and stock-based compensation are the critical accounting estimates and judgments used in the preparation of our condensed consolidated financial statements. For further discussion of our critical accounting policies, see Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Critical Accounting Policies” in Part II of our Annual Report on Form 10-K for the year ended January 31, 2013.

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RESULTS OF OPERATIONS

Revenues and Gross Profit

Three months ended April 30,	2013			Change		2012
System and software revenues	$	123.3		(17	)%	$	149.4
System and software gross profit	$	113.2		(15	)%	$	132.4
Gross profit percent	92		%			89		%
Service and support revenues	$	103.2		5	%	$	98.6
Service and support gross profit	$	73.1		4	%	$	70.1
Gross profit percent	71		%			71		%
Total revenues	$	226.5		(9	)%	$	247.9
Total gross profit	$	186.3		(8	)%	$	202.5
Gross profit percent	82		%			82		%

System and Software

Three months ended April 30,	2013		Change		2012
Upfront license revenues	$	100.3	(20	)%	$	126.0
Ratable license revenues	23.0		(2	)%	23.4
Total system and software revenues	$	123.3	(17	)%	$	149.4

We derive system and software revenues from the sale of licenses of software products and emulation hardware systems, including finance fee revenues from our long-term installment receivables resulting from product sales. Upfront license revenues consist of perpetual licenses and term licenses for which we recognize revenue upon product delivery at the start of a license term. We identify term licenses where collectibility is not probable and recognize revenue on those licenses when cash is received. Ratable license revenues primarily consist of short-term term licenses, term licenses where we provide the customer with rights to unspecified or unreleased future products, and finance fees from the accretion of the discount on long-term installment receivables.

Ten customers accounted for approximately 50% of system and software revenues for the three months ended April 30, 2013 compared to approximately 65% for the three months ended April 30, 2012.

System and software revenues decreased for three months ended April 30, 2013 compared to the three months ended April 30, 2012 primarily due to a $15.4 decrease in software license revenues due to the timing of contract renewals. The remainder of the decrease is primarily due to a decrease in sales of emulation hardware systems.

For the three months ended April 30, 2013, no single customer accounted for 10% or more of total revenues. For the three months ended April 30, 2012, one customer accounted for 20% of total revenues.

System and software gross profit percentage was higher for the three months ended April 30, 2013 compared to the three months ended April 30, 2012 primarily due to a change in product mix.

Service and Support

We derive service and support revenues from software and hardware post-contract maintenance or support services and professional services, which includes consulting, training, and other services. Professional services are lower margin offerings which are staffed according to fluctuations in demand. Support services operate under a less variable cost structure.

The increase in service and support revenues for the three months ended April 30, 2013 compared to the three months ended April 30, 2012 was primarily due to increased service revenues resulting from an increase in our installed base.

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Geographic Revenues Information

Revenue by Geography

Three months ended April 30,	2013		Change		2012
North America	$	99.1	(23	)%	$	129.1
Europe	48.7		(7	)%	52.6
Japan	26.7		7	%	25.0
Pacific Rim	52.0		26	%	41.2
Total revenues	$	226.5	(9	)%	$	247.9

The changes in revenues in Pacific Rim and North America for the three months ended April 30, 2013 compared to the three months ended April 30, 2012 were the result of the timing and geographic location of contract renewals.

For the three months ended April 30, 2013, approximately one-third of European and substantially all of Japanese revenues were subject to exchange rate fluctuations as they were booked in local currencies. We recognize additional revenues in periods when the U.S. dollar weakens in value against foreign currencies. Likewise, we recognize lower revenues in periods when the U.S. dollar strengthens in value against foreign currencies.

Foreign currency had an unfavorable impact of $4.7 for the three months ended April 30, 2013 compared to the three months ended April 30, 2012primarily as a result of the strengthening of the U.S. dollar against the Japanese yen.

For additional description of how changes in foreign exchange rates affect our condensed consolidated financial statements, see discussion in Part I, “Item 3. Quantitative and Qualitative Disclosures About Market Risk –Foreign Currency Risk.”

Revenue by Category

We segregate revenues into five categories of similar products and services. Each category includes both product and related support revenues. Revenues for each category as a percent of total revenues are as follows (percentages rounded to the nearest 5%):

Three months ended April 30,	2013		2012
Revenues:
IC Design to Silicon	35	%	40	%
Scalable Verification	20	%	25	%
Integrated System Design	30	%	25	%
New & Emerging Products	5	%	5	%
Services & Other	10	%	5	%
Total revenues	100	%	100	%

Certain reclassifications have been made between categories in the fiscal 2013 presentation to be consistent with the fiscal 2014 presentation.

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Operating Expenses

Three months ended April 30,	2013			Change		2012
Research and development	$	79.7		12	%	$	71.1
Marketing and selling	79.1			(1	)%	79.8
General and administration	18.3			10	%	16.6
Equity in earnings of Frontline	(0.4		)	(33	)%	(0.6		)
Amortization of intangible assets	1.7			—	%	1.7
Special charges	2.1			91	%	1.1
Total operating expenses	$	180.5		6	%	$	169.7

Selected Operating Expenses as a Percentage of Total Revenues

Three months ended April 30,	2013		2012
Research and development	35	%	29	%
Marketing and selling	35	%	32	%
General and administration	8	%	7	%
Total selected operating expenses	78	%	68	%

Research and Development

Research and development expenses increased by $8.7 for the three months ended April 30, 2013 compared to the three months ended April 30, 2012. The components of these increases are summarized as follows:

	Change for the three months ended April 30,
Salaries, variable compensation, and benefits expenses	$	4.5
Other expenses	4.2
Total change in research and development expenses	$	8.7

Marketing and Selling

Marketing and selling expenses decreased by $(0.6) for the three months ended April 30, 2013 compared to the three months ended April 30, 2012. The components of these decreases are summarized as follows:

	Three months ended April 30,
Salaries, variable compensation, and benefits expenses	$	(2.2	)
Other expenses	1.6
Total change in marketing and selling expenses	$	(0.6	)

General and Administration

General and administration expenses increased by $1.6 for the three months ended April 30, 2013 compared to the three months ended April 30, 2012. The increase from the three months ended April 30, 2012 was primarily driven by expenses associated with outside services.

We incur a substantial portion of our operating expenses outside the U.S. in various foreign currencies. We recognize additional operating expense in periods when the U.S. dollar weakens in value against foreign currencies and lower operating expenses in periods when the U.S. dollar strengthens in value against foreign currencies. We experienced favorable currency movements of approximately $1.8 in total operating expenses for the three months ended April 30, 2013, compared to the three months ended

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April 30, 2012, primarily due to movements in the Japanese yen and the Indian rupee. The impact of these currency movements is reflected in the changes in operating expenses detailed above.

Equity in Earnings of Frontline

We have a 50% interest in a joint venture, Frontline P.C.B. Solutions Limited Partnership (Frontline). Frontline is owned equally by Mentor and Orbotech, Ltd., an Israeli company.

Frontline reports on a calendar year basis. As such, we record our interest in the earnings of Frontline on a one-month lag. The following presents the summarized financial information of Mentor’s 50% interest in Frontline for the three months ended March 31, 2013 and 2012:

For the three months ended March 31,	2013			2012
Net income, as reported	$	1.1		$	1.8
Amortization of purchased technology and other identified intangible assets	(0.7		)	(1.2		)
Equity in earnings of Frontline	$	0.4		$	0.6

Provision for Income Taxes

Three months ended April 30,	2013		Change		2012
Income tax provision	$	0.6	(25	)%	$	0.8

Generally, the provision for income taxes is the result of the mix of profits and losses earned in various tax jurisdictions with a broad range of income tax rates, withholding taxes, changes in tax reserves, and the application of valuation allowances on deferred tax assets. The provision considers that a significant amount of our earnings are in certain foreign operations, including our Irish subsidiaries. Accounting guidance requires for interim reporting that we evaluate our provision for income tax expense (benefit) based on our projected results of operations for the full year, and record adjustments in each quarter. Such adjustments consider period specific items and a separate determination of tax expense for entities in our consolidated group that are projected to have losses for which no tax benefit will be recognized.

Three months ended April 30,	2013			2012
Effective Tax Rate	381		%	3		%
Net period specific items provision (benefit)	$	0.4		$	(1.3	)
Effective tax rate without period specific items	140		%	7		%

For the three months ended April 30, 2013, we have a 140% effective tax rate without period specific items. This current period effective tax rate differs from our effective tax rate for the three months ended April 30, 2012 due to the fact that our income before income tax for the period was near break-even and to the application of the accounting guidance for interim periods with respect to jurisdictions with projected losses before tax for which no tax benefits will be recognized.

For our full year forecast, we have projected a 13% effective tax rate. This rate is inclusive of period specific items recognized through April 30, 2013. Our projected rate differs from tax computed at the U.S. federal statutory rate of 35% primarily due to:

• The benefit of lower tax rates on earnings of foreign subsidiaries;

• Forecasted utilization of net operating loss carryforwards for which no benefit was previously recognized; and

• The application of tax incentives for research and development.

These differences are partially offset by:

• Additions to reserves for uncertain tax positions;

• Repatriation of foreign subsidiary earnings to the U.S.;

• Non-deductible equity compensation expense; and

• Withholding taxes.

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We have not provided for income taxes on the undistributed earnings of our foreign subsidiaries to the extent they are considered permanently reinvested outside of the U.S. Upon repatriation, some of these earnings may be sheltered by U.S. loss carryforwards, research and development credits and foreign tax credits, which may reduce the federal tax liability associated with any future foreign dividend. Where the earnings of our foreign subsidiaries are not treated as permanently reinvested, we have considered the impact in our provision.

We are subject to income taxes in the U.S. and in numerous foreign jurisdictions. In the ordinary course of business, there are many transactions and calculations where the ultimate tax determination is uncertain. The statute of limitations for adjustments to our historic tax obligations varies from jurisdiction to jurisdiction. In some cases it may be extended or be unlimited. Furthermore, net operating loss and tax credit carryforwards may be subject to adjustment after the expiration of the statute of limitations of the year such net operating losses and tax credits originated. Our larger jurisdictions generally provide for a statute of limitations from three to five years. We are currently under examination in various jurisdictions. The examinations are in different stages and timing of their resolution is difficult to predict. For U.S. federal income tax purposes, the statute of limitations is open for fiscal year 2010 and forward although net operating losses and credits from all years are subject to examination and adjustments for the three years following the year in which they were utilized. The statute of limitations remains open for years on or after fiscal 2008 in Japan and fiscal 2009 in Ireland.

We have reserves for taxes to address potential exposures involving tax positions that are being challenged or that could be challenged by taxing authorities even though we believe that the positions we have taken are appropriate. We believe our tax reserves are adequate to cover potential liabilities. We review the tax reserves quarterly and as circumstances warrant and adjust the reserves as events occur that affect our potential liability for additional taxes. Many of these events cannot be predicted, such as clarifications of tax law by administrative or judicial means, and it is often difficult to predict the final outcome or timing of resolution of any particular tax matter. We expect to record additional reserves in future periods with respect to our tax filing positions. To the extent that uncertain tax positions resolve in our favor, it could have a positive impact on our effective tax rate.

LIQUIDITY AND CAPITAL RESOURCES

Our primary ongoing cash requirements are for product development, operating activities, capital expenditures, debt service, and acquisition opportunities that may arise. Our primary sources of liquidity are cash generated from operations and borrowings on our revolving credit facility.

We currently have sufficient funds for domestic operations and do not anticipate the need to repatriate funds associated with our permanently reinvested foreign earnings for use in U.S. operations. As of April 30, 2013, we have cash totaling $145.7 held by our foreign subsidiaries. A significant portion of our offshore cash is accessible without a significant tax cost as some of our foreign earnings were previously taxed in the U.S. and other foreign earnings may be sheltered from U.S. tax by net operating loss and tax credit carryforwards. To the extent our foreign earnings are not permanently reinvested, we have provided for the tax consequences that would ensue upon their repatriation. In the event funds which are treated as permanently reinvested are repatriated, we may be required to accrue and pay additional taxes to repatriate these funds.

To date, we have experienced no loss or lack of access to our invested cash; however, we can provide no assurances that access to our cash will not be impacted by adverse conditions in the financial markets.

At any point in time, we have significant balances in operating accounts that are with individual third-party financial institutions, which may exceed the Federal Deposit Insurance Corporation insurance limits or other regulatory insurance program limits. While we monitor daily the cash balances in our operating accounts and adjust the cash balances as appropriate, these cash balances could be impacted if the underlying financial institutions fail or are subject to other adverse conditions in the financial markets.

We anticipate that the following will be sufficient to meet our working capital needs on a short-term (twelve months or less) and a long-term (more than twelve months) basis:

• Current cash balances;

• Anticipated cash flows from operating activities, including the effects of selling and financing customer term receivables;

• Amounts available under existing revolving credit facilities; and

• Other available financing sources, such as the issuance of debt or equity securities.

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We have experienced no difficulties to date in raising debt. However, capital markets have been volatile, and we cannot assure that we will be able to raise debt or equity capital on acceptable terms, if at all.

Cash Flow Information

Three months ended April 30,	2013			2012
Cash provided by operating activities	$	12.1		$	6.1
Cash used in investing activities	$	(15.2	)	$	(12.1	)
Cash used in financing activities	$	(21.4	)	$	(4.2	)

Operating Activities

Cash flows from operating activities consist of our net income adjusted for certain non-cash items and changes in operating assets and liabilities. Our cash flows from operating activities are significantly influenced by the payment terms on our license agreements and by our sales of qualifying accounts receivable. Our customers’ inability to fulfill payment obligations could adversely affect our cash flow. Though we have not, to date, experienced a material level of defaults, material payment defaults by our customers as a result of negative economic conditions or otherwise could have a material adverse effect on our financial condition. We monitor our accounts receivable portfolio for customers with low or declining credit ratings and increase our collection efforts when necessary.

Trade Accounts and Term Receivables

As of	April 30, 2013		January 31, 2013
Trade accounts receivable, net	$	367.4	$	412.2
Term receivables, long-term	$	228.4	$	250.5
Average days sales outstanding in trade accounts receivable, net	146 days		112 days
Average days sales outstanding in trade accounts receivable, net, excluding the current portion of term receivables	50 days		48 days

The overall increase in the average days sales outstanding in trade accounts receivable, net for both measures as of April 30, 2013 was primarily due to a decrease in revenue in the first quarter of fiscal 2014 compared to the fourth quarter of fiscal 2013.

The current portion of term receivables was $241.4 as of April 30, 2013 and $233.9 as of January 31, 2013. Term receivables are attributable to multi-year term license sales agreements. We include amounts for term agreements that are due within one year in trade accounts receivable, net, and balances that are due in more than one year in term receivables, long-term. We use term agreements as a standard business practice and have a history of successfully collecting under the original payment terms without making concessions on payments, products, or services. Total term receivables were $469.8 as of April 30, 2013 compared to $484.4 as of January 31, 2013.

We enter into agreements to sell qualifying accounts receivable from time to time to certain financing institutions on a non-recourse basis. We received net proceeds from the sale of receivables of $8.5 for the three months ended April 30, 2013 compared to $7.5 for the three months ended April 30, 2012. We continue to have no difficulty in factoring receivables and continue to evaluate the economics of the sale of accounts receivable. We have not set a target for the sale of accounts receivables for the remainder of fiscal 2014.

Accrued Payroll and Related Liabilities

As of	April 30, 2013		January 31, 2013
Accrued payroll and related liabilities	$	56.5	$	101.4

The decrease in accrued payroll and related liabilities as of April 30, 2013 compared to January 31, 2013 was primarily due to incentive payments made during fiscal 2014 on fiscal 2013 year-end accruals. We generally experience higher accrued payroll and related liability balances at year-end primarily due to increased commission accruals associated with an increase in revenues in the fourth quarter. Additionally, we generally experience an increase in variable compensation at year-end due to the full year achievement of results.

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Investing Activities

Cash used in investing activities for the three months ended April 30, 2013 primarily consisted of cash paid for purchases of short-term investments and capital expenditures.

During the three months ended April 30, 2013, we invested excess cash of $7.8 into certificates of deposit with an annual interest rate of 8.75%.

Expenditures for property, plant, and equipment decreased to $4.4 for the three months ended April 30, 2013 compared to $11.6 for the three months ended April 30, 2012. The expenditures for property, plant, and equipment for the three months ended April 30, 2013 were primarily a result of spending on information technology and infrastructure improvements within facilities. We expect total capital expenditures for property, plant, and equipment for fiscal 2014 to be approximately $40.0. We plan to finance our investments in property, plant, and equipment using cash on hand.

During the three months ended April 30, 2013, we acquired certain assets of one privately-held company for cash of approximately $3.0. We plan to finance future business acquisitions through cash and possible common stock issuances. The cash expected to be utilized includes cash on hand, cash generated from operating activities, and borrowings on our revolving credit facility.

Financing Activities

For the three months ended April 30, 2013, cash used in financing activities consisted primarily of repurchases of our common stock and the payment of dividends offset in part by proceeds from the issuance of common stock.

In April 2011, we announced a share repurchase program under which we may repurchase up to $150.0 of our common stock over a three year period through April 2014. In February 2012, the Board of Directors approved an increase in the amount we may repurchase under this program from $150.0 to $200.0. During the three months ended April 30, 2013, we repurchased 1.2 shares of common stock for $20.0 under this program. As of April 30, 2013, $56.1 remained available for repurchases under this program.

On March 7, 2013, the Board of Directors announced the adoption of a dividend policy under which we intend to pay an annual cash dividend of $0.18 per share of common stock. The initial quarterly dividend of $0.045 per share of outstanding common stock for a total of $5.1 was paid on April 10, 2013 to shareholders of record as of the close of business on March 22, 2013. On May 23, 2013, we announced a quarterly dividend of $0.045 per share on outstanding common stock, payable on July 1, 2013 to shareholders of record as of the close of business on June 10, 2013. Future declarations of quarterly dividends and the establishment of future record and payment dates are subject to the quarterly determination of our Board of Directors.

Under the terms of our revolving credit facility, the combination of the amount of our common stock we can repurchase and the amount of dividends we can pay is limited to $50.0 plus 70% of our cumulative net income for periods after January 31, 2011. An additional $82.0 is available for common stock purchases or dividend payments under this limit as of April 30, 2013.

Other factors affecting liquidity and capital resources

4.00% Debentures due 2031

In April 2011, we issued $253.0 of 4.00% Convertible Subordinated Debentures due 2031 (4.00% Debentures). Interest on the 4.00% Debentures is payable semi-annually in April and October. The 4.00% Debentures are convertible, under certain circumstances, into our common stock at a conversion price of $20.538 per share for a total of 12.3 shares as of April 30, 2013.

Upon conversion of any 4.00% Debentures, a holder will receive:

(i) Cash up to the principal amount of the 4.00% Debentures that are converted; and

(ii) Cash or shares of common stock, at our election, for the excess, if any, of the value of the converted shares over the principal amount.

If a holder elects to convert their 4.00% Debentures in connection with a fundamental change in the company that occurs prior to April 5, 2016, the holder will also be entitled to receive a make whole premium upon conversion in some circumstances. Any make whole premium would have the effect of increasing the amount of any cash, securities, or other property or assets otherwise due to holders of debentures upon conversion.

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We may redeem some or all of the 4.00% Debentures for cash on or after April 5, 2016 at the following redemption prices expressed as a percentage of principal, plus any accrued and unpaid interest:

Period	Redemption Price
Beginning on April 5, 2016 and ending on March 31, 2017	101.143	%
Beginning on April 1, 2017 and ending on March 31, 2018	100.571	%
On April 1, 2018 and thereafter	100.000	%

The holders, at their option, may redeem the 4.00% Debentures in whole or in part for cash on April 1, 2018, April 1, 2021, and April 1, 2026, and in the event of a fundamental change in the company. In each case, the repurchase price will be 100% of the principal amount of the 4.00% Debentures plus any accrued and unpaid interest.

For further information on the 4.00% Debentures, see Note 6. “Notes Payable” in Part I, Item 1. “Financial Statements.”

Revolving Credit Facility

In April 2011, we entered into a syndicated, senior, unsecured, four-year revolving credit facility that was originally scheduled to terminate on April 27, 2015. On May 24, 2013, we amended the facility to, among other things, extend the termination date to May 24, 2017.

The revolving credit facility has a maximum borrowing capacity of $125.0. Under the amendment, we have the option to pay interest based on:

(i) London Interbank Offered Rate (LIBOR) with varying maturities commensurate with the borrowing period we select, plus a spread based of between 2.00% and 2.50% on a pricing grid tied to a financial covenant; or

(ii) A base rate plus a spread of between 1.00% and 1.50%, based on a pricing grid tied to a financial covenant.

As a result of these interest rate options, our interest expense associated with borrowings under this revolving credit facility will vary with market interest rates. In addition, commitment fees are payable on the unused portion of the revolving credit facility at rates between 0.30% and 0.40% based on a pricing grid tied to a financial covenant. We had no borrowings against the revolving credit facility during the three months ended April 30, 2013 and 2012.

This revolving credit facility contains certain financial and other covenants, including a limit on the aggregate amount we can pay for dividends and repurchases of our stock over the term of the facility.

We were in compliance with all financial covenants as of April 30, 2013. If we fail to comply with the financial covenants and do not obtain a waiver from our lenders, we would be in default under the revolving credit facility and our lenders could terminate the facility and demand immediate repayment of all outstanding loans under the revolving credit facility.

For further information on our revolving credit facility, see Note 5. “Short-Term Borrowings” in Part I, Item 1. “Financial Statements.”

OUTLOOK FOR FISCAL 2014

We expect revenues for the second quarter of fiscal 2014 to be approximately $245.0 million with earnings per share for the same period of approximately $0.14 per diluted share. For the full fiscal year 2014, we expect revenues of approximately $1.155 billion with earnings per share of $1.33 per diluted share.

Item 3. Quantitative and Qualitative Disclosures about Market Risk

Unless otherwise indicated, all numerical references in tables are in millions, except interest rates and contract rates.

Interest Rate Risk

We are exposed to interest rate risk primarily through our investment portfolio, short-term borrowings, and notes payable. We do not use derivative financial instruments for speculative or trading purposes.

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We place our investments in instruments that meet high quality credit standards, as specified in our investment policy. The policy also limits the amount of credit exposure to any one issuer and type of instrument. We do not expect any material loss with respect to our investment portfolio.

The table below presents the carrying amount and related weighted-average fixed interest rates for our investment portfolio. The carrying amount approximates fair value as of April 30, 2013. In accordance with our investment policy, all short-term investments mature in twelve months or less.

Principal (notional) amounts in United States dollars	Carrying Amount		Average Fixed Interest Rate
Cash equivalents - fixed rate	$	5.5	5.29%
Short-term investments - fixed rate	7.8		8.75%
Total fixed rate interest bearing instruments	$	13.3	7.32%

We had convertible subordinated debentures with a principal balance of $253.0 outstanding with a fixed interest rate of 4.00% as of April 30, 2013 and April 30, 2012. Interest rate changes for fixed rate debt affect the fair value of the debentures but do not affect future earnings or cash flow.

We have a syndicated, senior, unsecured, revolving credit facility, which expires on May 24, 2017. Borrowings under the revolving credit facility are permitted to a maximum of $125.0. Under this revolving credit facility, we have the option to pay interest based on:

(i) London Interbank Offered Rate (LIBOR) with varying maturities commensurate with the borrowing period we select, plus a spread of between 2.00% and 2.50% based on a pricing gird tied to a financial covenant; or

(ii) A base rate plus a spread of between 1.00% and 1.50%, based on a pricing grid tied to a financial covenant.

The base rate is defined as the highest of:

(i) The federal funds rate, as defined, plus 0.5%;

(ii) The prime rate of the lead bank; or

(iii) One-month LIBOR plus 1.0%.

As a result of the interest rate options, our interest expense associated with borrowings under this revolving credit facility will vary with market interest rates. This revolving credit facility contains certain financial and other covenants, including restrictions on the payment of dividends. As of April 30, 2013 and 2012, we had no balance outstanding against this revolving credit facility. Interest rate changes for variable interest rate debt generally do not affect the fair market value, but do affect future earnings and cash flow. For further information on our revolving credit facility, see Note 5. “Short-Term Borrowings” in Part I, Item 1. “Financial Statements.”

We had other short-term borrowings of $1.1 outstanding as of April 30, 2013 and $5.0 as of April 30, 2012 with variable rates based on market indexes. Interest rate changes for variable interest rate debt generally do not affect the fair market value, but do affect future earnings and cash flow.

Foreign Currency Risk

We transact business in various foreign currencies and have established a foreign currency hedging program to hedge certain foreign currency forecasted transactions and exposures from existing assets and liabilities. Our derivative instruments consist of short-term foreign currency exchange contracts, with a duration period of a year or less. We enter into contracts with counterparties who are major financial institutions and, as such we do not expect material losses as a result of defaults by our counterparties. We do not hold or issue derivative financial instruments for speculative or trading purposes.

We enter into foreign currency forward contracts to protect against currency exchange risk associated with expected future cash flows. Our practice is to hedge a majority of our existing material foreign currency transaction exposures, which generally represent the excess of expected euro and British pound denominated expenses over expected euro and British pound denominated revenues, and the excess of Japanese yen denominated revenues over expected Japanese yen denominated expenses. We also enter into foreign currency forward contracts to protect against currency exchange risk associated with existing assets and liabilities.

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The following table provides volume information about our foreign currency forward program. The information provided is in United States dollar equivalent amounts. The table presents the gross notional amounts, at contract exchange rates, and the weighted average contractual foreign currency exchange rates. These forward contracts mature within the next twelve months.

As of	April 30, 2013			January 31, 2013
	Gross Notional Amount		Weighted Average Contract Rate	Gross Notional Amount		Weighted Average Contract Rate
Forward Contracts:
Euro	$	28.9	0.77	$	27.0	0.74
Japanese yen	20.0		97.97	40.6		90.11
British pound	12.8		0.65	13.9		0.63
Swedish krona	11.1		6.50	13.1		6.52
Canadian dollar	10.2		1.03	9.5		0.99
Indian rupee	8.1		54.56	3.8		54.32
Other (1)	34.9		—	24.9		—
Total forward contracts	$	126.0		$	132.8

⁽¹⁾  Other includes the Israeli shekel, Chinese yuan, Taiwan dollar, Armenian dram, Danish kroner, Polish zloty, Russian ruble, Norwegian kroner, Swiss franc, Hungarian forint, Korean won and Singapore dollar.

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Item 4. Controls and Procedures

(1) Evaluation of Disclosure Controls and Procedures

We maintain disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934, as amended (Exchange Act), that are designed to ensure that information required to be disclosed in our Exchange Act reports is recorded, processed, summarized, and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer and our Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, management recognized that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving the desired control objectives, and management necessarily was required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

We carried out an evaluation, under the supervision and with the participation of our management, including our Chief Executive Officer and our Chief Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures as of the end of the period covered by this report. Based on the foregoing, our Chief Executive Officer and our Chief Financial Officer concluded that our disclosure controls and procedures were effective at the reasonable assurance level as of the end of the period covered by this report.

(2) Changes in Internal Controls Over Financial Reporting

There has been no change in our internal control over financial reporting that occurred during the last fiscal quarter that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

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PART II. OTHER INFORMATION

Item 1. Legal Proceedings

On December 21, 2012, Synopsys, Inc. (Synopsys) filed a lawsuit claiming patent infringement against Mentor Graphics Corporation (Mentor) in federal district court in the Northern District of California, alleging that Mentor's Veloce family of products infringes on Synopsys' United States Patents Nos. 5,748,488, 5,530,841, 5,680,318, and 6,836,420. This case seeks compensatory damages and a permanent injunction. We believe this lawsuit was filed in response to patent lawsuits we filed against Emulation and Verification Engineering S.A. and EVE-USA, Inc. (collectively EVE), which Synopsys acquired in October 2012. Our lawsuits, which allege that EVE's Zebu emulation products infringe several of our U.S. patents, were filed against EVE in federal district court in Oregon in 2010 and 2012. We do not have sufficient information upon which to determine that a loss in connection with this matter is probable, reasonably possible or estimable, and thus no reserve has been established nor has a range of loss been disclosed.

Item 1A. Risk Factors

The forward-looking statements contained under “Outlook for Fiscal 2014” in Part I, Item 2, “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and all other statements contained in this report that are not statements of historical fact, including without limitation, statements containing the words “believes,” “expects,” “projections,” and words of similar meaning, constitute forward-looking statements that involve a number of risks and uncertainties that are difficult to predict. Moreover, from time to time, we may issue other forward-looking statements. Forward-looking statements regarding financial performance in future periods, including the statements under “Outlook for Fiscal 2014,” do not reflect potential impacts of mergers or acquisitions or other significant transactions or events that have not been announced as of the time the statements are made. Actual outcomes and results may differ materially from what is expressed or forecast in forward-looking statements. We disclaim any obligation to update forward-looking statements to reflect future events or revised expectations. Our business faces many risks, and set forth below are some of the factors that could cause actual results to differ materially from the results expressed or implied by our forward-looking statements. Forward-looking statements should be considered in light of these factors.

Weakness in the United States (U.S.) and international economies may harm our business.

Our revenue levels are generally dependent on the level of technology capital spending, which includes worldwide expenditures for electronic design automation (EDA) software, hardware, and consulting services. Periods of economic uncertainty, such as the recession experienced in 2008 and 2009, the economic conditions in Japan caused by the 2011 earthquake and tsunami, or the ongoing European debt crisis, can adversely affect our customers and postpone decisions to license or purchase our products, decrease our customers’ spending, and jeopardize or delay our customers’ ability or willingness to make payment obligations, any of which could adversely affect our business. In addition, significant customer payment defaults or bankruptcies could materially harm our business.

We are subject to the cyclical nature of the integrated circuit (IC) and electronics systems industries.

Purchases of our products and services are highly dependent upon new design projects initiated by customers in the IC and electronics systems industries. These industries are highly cyclical and are subject to constant and rapid technological change, rapid product obsolescence, price erosion, evolving standards, short product life cycles, and wide fluctuations in product supply and demand. The increasing complexity of ICs and resulting increase in costs to design and manufacture ICs have in recent years led to fewer design starts, which could cause a reduced demand for our products. In addition, the IC and electronics systems industries regularly experience significant downturns, often connected with, or in anticipation of, maturing product cycles within such companies or a decline in general economic conditions. These downturns could cause diminished demand for our products and services.

Our forecasts of our revenues and earnings outlook may be inaccurate.

Our revenues, particularly new software license revenues, are difficult to forecast. We use a “pipeline” system, a common industry practice, to forecast revenues and trends in our business. Sales personnel monitor the status of potential business and estimate when a customer will make a purchase decision, the dollar amount of the sale, and the products or services to be sold. These estimates are aggregated periodically to generate a sales pipeline. Our pipeline estimates may prove to be unreliable either in a particular quarter or over a longer period of time, in part because the “conversion rate” of the pipeline into contracts can be very difficult to estimate and requires management judgment. A variation in the conversion rate could cause us to plan or budget incorrectly and materially adversely impact our business or our planned results of operations. In particular, a slowdown

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in customer spending or weak economic conditions generally can reduce the conversion rate in a particular quarter as purchasing decisions are delayed, reduced in amount, or canceled. The conversion rate can also be affected by the tendency of some of our customers to wait until the end of a fiscal quarter attempting to obtain more favorable terms. This may result in failure to agree to terms within the fiscal quarter and cause expected revenue to slip into a subsequent quarter.

Our business could be impacted by fluctuations in quarterly results of operations due to customer seasonal purchasing patterns, the timing of significant orders, and the mix of licenses and products purchased by our customers.

We have experienced, and may continue to experience, varied quarterly operating results. Various factors affect our quarterly operating results and some of these are not within our control, including customer demand and the timing of significant orders. We typically experience seasonality in demand for our products, due to the purchasing cycles of our customers, with revenues in the fourth quarter generally being the highest. If planned contract renewals are delayed or the average size of renewed contracts do not increase as we anticipate, we could fail to meet our and investors’ expectations, which could have a material adverse impact on our stock price.

Our revenues are also affected by the mix of transaction types entered into where we recognize software revenues in different ways as required by accounting rules: as payments become due and payable, on a cash basis, or ratably over the license term, or recognized at the beginning of the license term. We recognize revenues ratably over the license term, for instance, when the customer is provided with rights to unspecified or unreleased future products. A shift in the license mix toward increased ratable, due and payable, and/or cash-based revenue recognition could result in increased deferral of software revenues to future periods and would decrease current revenues, which could result in us not meeting near-term revenue expectations.

The gross margin on our software is greater than that for our emulation hardware systems, software support, and professional services. Therefore, our gross margin may vary as a result of the mix of products and services sold. We also have a significant amount of fixed or relatively fixed costs, such as employee costs and purchased technology amortization, and costs which are committed in advance and can only be adjusted periodically. As a result, a small failure to reach planned revenues would likely have a relatively large negative effect on resulting earnings. If anticipated revenues do not materialize as expected, our gross margins and operating results could be materially adversely impacted.

We face intense price competition in the EDA industry.

Price competition in the EDA industry is intense, which can lead to, among other things, price reductions, longer selling cycles, lower product margins, loss of market share, and additional working capital requirements. If our competitors offer significant discounts on certain products, we may need to lower our prices or offer other favorable terms to compete successfully. Any such changes would likely reduce margins and could materially adversely impact our operating results. Any broad-based changes to our prices and pricing policies could cause new software license and service revenues to decline or be delayed as the sales force implements and our customers adjust to the new pricing policies. Some of our competitors may bundle certain software products at low prices for promotional purposes or as a long-term pricing strategy. These practices could significantly reduce demand for our products or limit prices we can charge.

We currently compete primarily with two large companies: Synopsys, Inc. and Cadence Design Systems, Inc. We also compete with smaller companies and compete with manufacturers of electronic devices that have developed their own EDA products internally.

We may experience difficulty in manufacturing our emulation hardware.

We contract with a single manufacturer to assemble our hardware emulation products and purchase some components from a single supplier. As a result, we may be exposed to delays in production and delivery of our emulation products due to delays in receiving components or manufacturing constraints, components rejected that do not meet our standards, low yields of ICs, subassemblies, or printed circuit boards, or other delays in the manufacturing process. For single source parts we purchase for our emulation products, there can be no assurance that, if a supplier cannot deliver, a second source can be found on a timely basis.

Foreign currency fluctuations may have an adverse impact on our operating results.

We typically generate about half of our revenues from customers outside the U.S. and we generate approximately one-third of our expenses outside the U.S. While most of our international sales are denominated in U.S. dollars, our international operating expenses are typically denominated in foreign currencies. Significant changes in currency exchange rates, particularly in the Japanese yen, euro, and the British pound, could have an adverse impact on our operating results.

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Our international operations involve risks that could increase our expenses, adversely affect our operating results, and require increased time and attention of our management.

Our international operations subject us to risks in addition to those we face in our domestic operations, including longer receivables collection periods, changes in a specific country’s or region’s economic or political conditions, trade protection measures, local labor laws, import or export licensing requirements, anti-corruption, anti-bribery, and other similar laws, loss or modification of exemptions for taxes and tariffs, limitations on repatriation of earnings, and difficulties with licensing and protecting our intellectual property rights. If we violate applicable laws related to our business, we could be subject to penalties, fines, or other sanctions and could be prohibited or limited from doing business in one or more countries.

Customer payment defaults could adversely affect our timing of revenue recognition.

We use fixed-term license agreements as standard business practices with customers we believe are creditworthy. These multi-year, multi-element term license agreements have payments spread over the license term and are typically about three years in length for semiconductor companies and about four years in length for military and aerospace companies. The complexity of these agreements tends to increase the risk associated with collectibility from customers that can arise for a variety of reasons including ability to pay, product dissatisfaction, and disputes. If we are unable to collect under these agreements, our results of operations could be materially adversely impacted. We use these fixed-term license agreements as a standard business practice and have a history of successfully collecting under the original payment terms without making concessions on payments, products, or services. If we no longer had a history of collecting without providing concessions on the terms of the agreements, then revenue would be required to be recognized, under U.S. generally accepted accounting principles, as the payments become due and payable over the license term. This change could have a material adverse impact on our near-term results.

IC and printed circuit board (PCB) technology evolves rapidly.

The complexity of ICs and PCBs continues to rapidly increase. In response to this increasing complexity, new design tools and methodologies must be invented or acquired quickly to remain competitive. If we fail to quickly respond to new technological developments, our products could become obsolete or uncompetitive, which could materially adversely impact our business.

Errors or defects in our products and services could expose us to liability and harm our reputation.

Our customers use our products and services in designing and developing products that involve a high degree of technological complexity and have unique specifications. Due to the complexity of the systems and products with which we work, some of our products and designs can be adequately tested only when put to full use in the marketplace. As a result, our customers or their end users may discover errors or defects in our software, or the products or systems designed with or manufactured using tools that may not operate as expected. Errors or defects could result in:

• Loss of current customers and loss of, or delay in, revenue and loss of market share;

• Failure to attract new customers or achieve market acceptance;

• Diversion of development resources to resolve the problems resulting from errors or defects; and

• Increased support or service costs.

In addition, we include limited amounts of third-party technology in our products and we rely on those third parties to provide support services to us. Failure of those third parties to provide necessary support services could materially adversely impact our business.

Long sales cycles and delay in customer completion of projects make the timing of our revenues difficult to predict.

We have a lengthy sales cycle. A lengthy customer evaluation and approval process is generally required due to the complexity and expense associated with our products and services. Consequently, we may incur substantial expenses and devote significant management effort and expense to develop potential relationships that do not result in agreements or revenues and may prevent us from pursuing other opportunities. Sales of our products and services are sometimes discretionary and may be delayed if customers delay approval or commencement of projects due to budgetary constraints, internal acceptance review procedures, timing of budget cycles, or timing of competitive evaluation processes. Long sales cycles for our hardware products may subject us to risks over which we have limited control, including insufficient, excess, or obsolete inventory, variations in inventory valuation, and fluctuations in quarterly operating results.

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Any loss of our leadership position in certain categories of the EDA market could harm our business.

The industry in which we compete is characterized by very strong leadership positions in specific categories of the EDA market. For example, one company may have a large percentage of sales in the physical verification category of the market while another may have a similarly strong position in mixed-signal simulation. These strong leadership positions can be maintained for significant periods of time as the software is difficult to master and customers are disinclined to make changes once their employees, as well as others in the industry, have developed familiarity with a particular software product. For these reasons, much of our profitability arises from niche areas in which we are the leader. Conversely, it is difficult for us to achieve significant profits in niche areas where other companies are the leaders. If for any reason we lose our leadership position in a niche, we could be materially adversely impacted.

Accounting rules governing revenue recognition are complex and may change.

The accounting rules governing software revenue recognition are complex and have been subject to authoritative interpretations that have generally made it more difficult to recognize software revenues at the beginning of the license period. To the extent that we do not recognize as much revenue at the beginning of the license period as in the past, such a change in accounting rules could have a material adverse impact on our short-term results.

We derive a substantial portion of our revenues from relatively few product groups.

We derive a substantial portion of our revenues from sales of relatively few product groups and related support services. As a result, any factor adversely affecting sales of these products, including the product release cycles, market acceptance, product competition, performance and reliability, reputation, price competition, and economic and market conditions, could harm our operating results.

We may have additional tax liabilities.

Significant judgments and estimates are required in determining the provision for income taxes and other tax liabilities around the world. Our tax expense may be impacted if our intercompany transactions, which are required to be computed on an arm’s-length basis, are challenged and successfully disputed by the tax authorities. Also, our tax expense could be impacted depending on the applicability of withholding taxes on software licenses and related intercompany transactions in certain jurisdictions. In determining the adequacy of income taxes, we assess the likelihood of adverse outcomes that could result if our tax positions were challenged by the Internal Revenue Service (IRS) and other tax authorities. The tax authorities in the U.S. and other countries where we do business regularly examine our income and other tax returns. The ultimate outcome of these examinations cannot be predicted with certainty. Should the IRS or other tax authorities assess additional taxes as a result of examinations, we may be required to record charges to operations that could have a material impact on the results of operations, financial position, or cash flows.

Forecasting our income tax rate is complex and subject to uncertainty.

The computation of income tax expense (benefit) is complex as it is based on the laws of numerous taxing jurisdictions and requires significant judgment on the application of complicated rules governing accounting for tax provisions under U.S. generally accepted accounting principles. Income tax expense (benefit) for interim quarters is based on a forecast of our global tax rate, including a separate determination for entities, if any, with losses for which no tax benefit is obtained. This forecast includes forward looking financial projections, including the expectations of profit and loss by jurisdiction, and contains numerous assumptions. Various items cannot be accurately forecasted and future events may be treated as discrete to the period in which they occur. Our income tax rate can be materially impacted, for example, by the geographical mix of our profits and losses, changes in our business, such as internal restructuring and acquisitions, changes in tax laws and accounting guidance, and other regulatory, legislative or judicial developments, tax audit determinations, changes in our tax positions, changes in our intent and capacity to permanently reinvest foreign earnings, changes to our transfer pricing practices, tax deductions attributed to equity compensation, and changes in our valuation allowance for deferred tax assets. For these reasons, our overall global tax rate may be materially different than our forecast.

There are limitations on the effectiveness of controls.

We do not expect that disclosure controls or internal control over financial reporting will prevent all errors and all fraud. A control system, no matter how well designed and operated, can provide only reasonable, not absolute, assurance that the control system’s objectives will be met. Further, the design of a control system must reflect the fact that there are resource constraints and the benefits of controls must be considered relative to their costs. Because of the inherent limitations in all control systems,

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no evaluation of controls can provide absolute assurance that our control system will detect all errors and instances of fraud, if any. Failure of our control systems to prevent error and fraud could materially adversely impact us.

We may not realize revenues as a result of our investments in research and development.

We incur substantial expense to develop new software products. Research and development activities are often performed over long periods of time. These efforts may not result in a successful product offering because of changes in market conditions or our failure to successfully develop products based on that research and development activity. As a result, we could realize little or no revenues related to our investment in research and development.

We may acquire other companies and may not successfully integrate them.

The industry in which we compete has experienced significant consolidation. We have acquired numerous businesses and have frequently been in discussions with potential acquisition candidates, and we may acquire other businesses in the future. While we expect to carefully analyze all potential transactions before committing to them, we cannot assure that any completed transaction will result in long-term benefits to us or our shareholders or that we will be able to manage the acquired businesses effectively. In addition, growth through acquisition involves a number of risks. If any of the following events occurs after we acquire another business, it could materially adversely impact us:

• Difficulties in combining previously separate businesses into a single unit;

• The substantial diversion of management’s attention from ongoing business when integrating the acquired business;

• The failure to realize anticipated benefits, such as cost savings and increases in revenues;

• The failure to retain key personnel of the acquired business;

• Difficulties related to assimilating the products of an acquired business in, for example, distribution, engineering, and customer support areas;

• Unanticipated costs;

• Unanticipated liabilities or litigation in connection with or as a result of an acquisition, including claims from terminated employees, customers, or third parties;

• Adverse impacts on existing relationships with suppliers and customers; and

• Failure to understand and compete effectively in markets in which we have limited experience.

Acquired businesses may not perform as projected, which could result in impairment of acquisition-related intangible assets. Additional challenges include integration of sales channels, training and education of the sales force for new product offerings, integration of product development efforts, integration of systems of internal controls, and integration of information systems. Accordingly, in any acquisition there will be uncertainty as to the achievement and timing of projected synergies, cost savings, and sales levels for acquired products. All of these factors could impair our ability to forecast, meet revenues and earnings targets, and manage effectively our business for long-term growth. We cannot assure that we can effectively meet these challenges.

Our competitors may acquire technology or other companies that impact our business.

Our competitors may acquire technology or companies offering competing or complementary product offerings which could adversely impact our ability to compete in the marketplace. They may be able to deliver better or broader product offerings, offer better pricing, or otherwise make it more desirable for our customers to buy more of the tools in their design flow from the competitor after the acquisition. In addition, our competitors may purchase companies or technology that we had an interest in acquiring, which could limit our expansion into certain market segments.

We may not adequately protect our proprietary rights or we may fail to obtain software or other intellectual property licenses.

Our success depends, in large part, upon our proprietary technology. We generally rely on patents, copyrights, trademarks, trade secret laws, licenses, and restrictive agreements to establish and protect our proprietary rights in technology and products. Despite precautions we may take to protect our intellectual property, we cannot assure that third parties will not try to challenge, invalidate, or circumvent these protections. The companies in the EDA industry, as well as entities and persons outside the industry, are obtaining patents at a rapid rate. We cannot predict if any of these patents will cover any of our products. In addition, many of these entities have substantially larger patent portfolios than we have. As a result, we may on occasion be forced to engage in costly patent litigation to protect our rights or defend our customers’ rights. We may also need

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to settle these claims on terms that are unfavorable; such settlements could result in the payment of significant damages or royalties, or force us to stop selling or redesign one or more products. We cannot assure that the rights granted under our patents will provide us with any competitive advantage, that patents will be issued on any of our pending applications, or that future patents will be sufficiently broad to protect our technology. Furthermore, the laws of foreign countries may not protect our proprietary rights in those countries to the same extent as U.S. law protects these rights in the U.S. In addition, despite our measures to limit piracy, other parties may attempt to illegally copy or use our products, which could result in lost revenue.

Some of our products include software or other intellectual property licensed from third parties, and we may have to seek new licenses or renew existing licenses for software and other intellectual property in the future. Failure to obtain software or other intellectual property licenses or rights from third parties on favorable terms could materially adversely impact us.

Intellectual property infringement actions may harm our business.

Patent holders are making increasing efforts to monetize their patent portfolios. Intellectual property (IP) infringement claims against us directly, or where we contractually must defend our customers, could result in costly litigation and consume significant time of employees and management. IP litigation could harm our business, either due to damage awards, the need to license technology on what might be unfavorable business terms, injunctions that could stop or delay future shipments, or the need to redesign our technology.

Our use of open source software could negatively impact our ability to sell our products and may subject us to unanticipated obligations.

The products, services or technologies we acquire, license, provide or develop may incorporate or use open source software. We monitor our use of open source software in an effort to avoid unintended consequences, such as reciprocal license grants, patent retaliation clauses, and the requirement to license our products at no cost. Nevertheless, we may be subject to unanticipated obligations regarding our products which incorporate open source software.

Our failure to attract and retain key employees may harm us.

We depend on the efforts and abilities of our senior management, our research and development staff, and a number of other key management, sales, support, technical, and services personnel. Competition for experienced, high-quality personnel is intense, and we cannot assure that we can continue to recruit and retain such personnel. Our failure to hire and retain such personnel could impair our ability to develop new products and manage our business effectively.

We have global sales and research and development offices in parts of the world that are not as politically stable as the United States.

We have global sales and research and development offices, some of which are in parts of the world that are not as politically stable as the United States. In particular our offices in Israel, Egypt and Pakistan may be subject to disruption or closure from time to time. As a result, we may face a greater risk of business interruption as a result of potential unrest, terrorist acts, or military conflicts than businesses located domestically.

Our business is subject to the risk of natural disasters.

We have sales and research and development offices around the world which may be adversely affected by weather, earthquakes, or other natural disasters. If a natural disaster occurs at or near any of our offices, our operations may be interrupted, which could adversely impact our business and results of operations. In addition, if a natural disaster impacts a significant number of our customers, our business and results of operations could be adversely impacted.

If our information technology security measures are breached, our information systems may be perceived as being insecure, which could harm our business and reputation.

Our products and services involve the storage and transmission of proprietary information owned by us and our customers. We have sales and research and development offices throughout the world. Our operations are dependent upon the connectivity of our operations throughout the world. Despite our security measures, our information technology and infrastructure may be vulnerable to cyber-attacks or breached due to employee errors or other disruptions that could result in unauthorized disclosure of sensitive information and could significantly interfere with our business operations. Breaches of our security measures could expose us to a risk of loss or misuse of this information, adverse publicity, violations of privacy laws, and litigation. Because techniques used to obtain unauthorized access or to sabotage information systems change frequently and generally are

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not recognized until launched against a target, we may be unable to anticipate these techniques or to implement adequate preventive measures. In addition, if we select a vendor that uses cyber storage of information as part of their service or product offerings, despite our attempts to validate the security of such services, proprietary information may be misappropriated by third parties. If there is an actual or perceived breach of our security, or the security of one of our vendors, the market perception of the effectiveness of our security measures could be harmed and we could suffer damage to our reputation or our business, or lose existing customers and lose our ability to obtain new customers.

Our shareholder rights plan may have anti-takeover effects.

In December 2011, we extended the term of our shareholder rights plan, which has the effect of making it more difficult for a person to acquire control of us in a transaction not approved by our board of directors. The provisions of our shareholder rights plan could have the effect of delaying, deferring, or preventing a change of control of us, could discourage bids for our common stock at a premium over the market price of our common stock and could materially adversely impact the market price of, and the voting and other rights of the holders of, our common stock.

Our revolving credit facility has financial and non-financial covenants, and default of any covenant could materially adversely impact us.

Our bank revolving credit facility imposes operating restrictions on us in the form of financial and non-financial covenants. Financial covenants include adjusted quick ratio, tangible net worth, leverage ratio, senior leverage ratio, and minimum cash and accounts receivable ratio. If we were to fail to comply with the financial covenants and did not obtain a waiver from our lenders, we would be in default under the revolving credit facility and our lenders could terminate the facility and demand immediate repayment of all outstanding loans under the revolving credit facility. The declaration of an event of default could have a material adverse effect on our financial condition. We could also find it difficult to obtain other bank lines or credit facilities on comparable terms.

We have a substantial level of indebtedness.

As of April 30, 2013, we had $254.1 million of outstanding indebtedness, which includes $253.0 million of 4.00% Convertible Subordinated Debentures due 2031 and $1.1 million in short-term borrowings. This level of indebtedness among other things could:

• Make it difficult for us to satisfy our payment obligations on our debt;

• Make it difficult for us to incur additional indebtedness or obtain any necessary financing in the future for working capital, capital expenditures, debt service, acquisitions, or general corporate purposes;

• Limit our flexibility in planning for or reacting to changes in our business;

• Reduce funds available for use in our operations;

• Make us more vulnerable in the event of a downturn in our business; and

• Place us at a possible competitive disadvantage relative to less leveraged competitors and competitors that have greater access to capital resources.

We may also be unable to borrow funds as a result of an inability of financial institutions to lend due to restrictive lending policies and/or institutional liquidity concerns.

If we experience a decline in revenues, we could have difficulty paying amounts due on our indebtedness. Any default under our indebtedness could have a material adverse impact on our business, operating results, and financial condition.

Our stock price could become more volatile, and your investment could lose value.

All of the factors discussed in this “Risk Factors” section could affect our stock price. The timing of announcements in the public market regarding new products, product enhancements, or technological advances by our competitors or us, and any announcements by us or by our competitors of acquisitions, major transactions, or management changes could also affect our stock price. Our stock price is subject to speculation in the press and the analyst community, changes in recommendations or earnings estimates by financial analysts, changes in investors’ or analysts’ valuation measures for our stock, our credit ratings, and market trends unrelated to our performance. A significant drop in our stock price could also expose us to the risk of securities class actions lawsuits, which could result in substantial costs and divert management’s attention and resources, which could adversely affect our business.

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Our business could be negatively affected as a result of actions of activist shareholders.

Responding to actions by activist shareholders can be costly and time-consuming, disrupting our operations and diverting the attention of management and our employees. The perceived uncertainties as to our future direction may result in the loss of potential business opportunities, and may make it more difficult to attract and retain qualified personnel and business partners.

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Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

The table below sets forth information regarding repurchases of our common stock by us during the three months ended April 30, 2013:

Period	Total number of shares purchased	Average price paid per share		Total number of shares purchased as part of publicly announced programs	Maximum dollar value of shares that may yet be purchased under the programs
February 1 - February 28, 2013	—	$	—	—	$	76,090,299
March 1 - March 31, 2013	1,151,216	17.37		1,151,216	56,095,145
April 1 - April 30, 2013	—	—		—	56,095,145
Total	1,151,216	$	17.37	1,151,216

On April 18, 2011, we announced a share repurchase program approved by our Board of Directors which authorized the repurchase of up to $150.0 million of our common stock over a three year period. On February 27, 2012, our Board of Directors authorized an additional $50.0 million shares of our common stock to be repurchased under this program, and clarified that the $25.0 million of shares repurchased in April 2011, using proceeds from our issuance of 4.00% Convertible Subordinated Debentures are considered to have been part of this program.

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Item 6. Exhibits

4.1	First Amendment to Credit Agreement dated as of May 24, 2013 between the Company, Bank of America, N.A. as agent and the other lenders.
31.1	Certification of Chief Executive Officer of Registrant Pursuant to SEC Rule 13a-14(a)/15d-14(a), as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Chief Financial Officer of Registrant Pursuant to SEC Rule 13a-14(a)/15d-14(a), as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32	Certifications of Chief Executive Officer and Chief Financial Officer of Registrant Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

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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.

Dated: June 5, 2013	MENTOR GRAPHICS CORPORATION (Registrant)
	/S/ GREGORY K. HINCKLEY
	Gregory K. Hinckley
	President, Chief Financial Officer

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EX-4.1

EXECUTION COPY

FIRST AMENDMENT TO CREDIT AGREEMENT

THIS FIRST AMENDMENT TO CREDIT AGREEMENT (this “Agreement”) dated as of May 24, 2013 (the “First Amendment Effective Date”) is entered into among Mentor Graphics Corporation, an Oregon corporation (the “Company”), the Banks party hereto and Bank of America, N.A., as administrative agent (the “Agent”) for the Banks. All capitalized terms used herein and not otherwise defined herein shall have the meanings given to such terms in the Credit Agreement (as defined below).

RECITALS

WHEREAS, the Company, the Banks and the Agent have entered into that certain Credit Agreement dated as of April 26, 2011 (as amended or modified from time to time, the “Credit Agreement”);

WHEREAS, the Company has requested that the Banks amend the Credit Agreement as set forth below;

NOW, THEREFORE, in consideration of the premises and the mutual covenants contained herein, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows:

1.    Amendments.

(a)    The definition of “Applicable Margin” in Section 1.01 of the Credit Agreement is hereby amended and restated in its entirety as follows:

“Applicable Margin” means the following percentages per annum, based upon the Senior Pricing Leverage Ratio as set forth in the most recent Compliance Certificate received by the Administrative Agent pursuant to Section 6.02(a):

Pricing Tier	Senior Pricing Leverage Ratio	Commitment Fee	Offshore Rate Loans	Base Rate Loans
1	< 0.50	0.30%	2.00%	1.00%
2	> 0.50 but < 1.00	0.35%	2.25%	1.25%
3	> 1.00	0.40%	2.50%	1.50%

Any increase or decrease in the Applicable Margin resulting from a change in the Senior Pricing Leverage Ratio shall become effective as of the first Business Day immediately following the date a Compliance Certificate is delivered pursuant to Section 6.02(a); provided, however, that if a Compliance Certificate is not delivered when due in accordance with such Section, then, upon the request of the Majority Banks, Pricing Tier 3 shall apply as of the first Business Day after the date on which such Compliance Certificate was required to have been delivered and shall remain in effect until the date on which such Compliance Certificate is delivered in accordance with Section 6.02(a), whereupon the Applicable Margin shall be adjusted based upon the calculation of the Senior Pricing Leverage Ratio contained in such Compliance Certificate. The Applicable Margin in effect from the First Amendment Effective Date through the first Business Day immediately following the

date a Compliance Certificate is delivered pursuant to Section 6.02(a) for the fiscal quarter ending April 30, 2013 shall be determined based upon Pricing Tier 1.

(b)    The definition of “Cash Acquisition Basket” in Section 1.01 of the Credit Agreement is hereby amended and restated in its entirety as follows:

“Cash Acquisition Basket” means, with respect to any fiscal year of the Company, $65,000,000.

(c)    The definition of “Change in Law” in Section 1.01 of the Credit Agreement is hereby amended and restated in its entirety as follows:

“Change in Law” means the occurrence, after the Closing Date, of any of the following: (a) the adoption or taking effect of any Requirement of Law, (b) any change in any Requirement of Law or in the administration, interpretation, implementation or application thereof by any Governmental Authority or (c) the making or issuance of any request, rule, guideline or directive (whether or not having the force of law) by any Governmental Authority; provided that notwithstanding anything herein to the contrary, (x) the Dodd-Frank Wall Street Reform and Consumer Protection Act and all requests, rules, guidelines or directives thereunder or issued in connection therewith and (y) all requests, rules, guidelines or directives promulgated by the Bank for International Settlements, the Basel Committee on Banking Supervision (or any successor or similar authority) or the United States or foreign regulatory authorities, in each case pursuant to Basel III, shall in each case be deemed to be a “Change in Law”, regardless of the date enacted, adopted or issued.

(d)    The definition of “FATCA” in Section 1.01 of the Credit Agreement is hereby amended and restated in its entirety as follows:

“FATCA” means Sections 1471 through 1474 of the Code, as of the First Amendment Effective Date (or any amended or successor version that is substantively comparable and not materially more onerous to comply with), and any current or future regulations promulgated thereunder or official interpretations thereof and any agreement entered into pursuant thereto (including any intergovernmental agreements).

(e)    The definition of “Offshore Rate” in Section 1.01 of the Credit Agreement is hereby amended and restated in its entirety as follows:

“Offshore Rate” means:

(a)    for any Interest Period with respect to an Offshore Rate Loan, the rate per annum equal to (i) the British Bankers Association LIBOR Rate or the successor thereto if the British Bankers Association if no longer making a LIBOR rate available (“LIBOR”), as published by Reuters (or such other commercially available source providing quotations of LIBOR as may be designated by the Agent from time to time) at approximately 11:00 a.m. (London time), two London Banking Days prior to the commencement of such Interest Period, for Dollar deposits (for delivery on the first day of such Interest Period) with a term equivalent to such Interest Period, or (ii) if such published rate is not available at such time for any reason, the rate determined by the Agent to be the rate at which deposits in Dollars for delivery on the first day of such Interest Period in same day funds in the approximate amount of the Offshore Rate Loan being made, continued or converted and with a term

equivalent to such Interest Period would be offered by Bank of America’s London Branch to major banks in the London interbank eurodollar market at their request at approximately 11:00 a.m. (London time) two London Banking Days prior to the commencement of such Interest Period; and

(b)    for any interest calculation with respect to a Base Rate Loan on any date, the rate per annum equal to (i) LIBOR, at approximately 11:00 a.m., London time determined two London Banking Days prior to such date for Dollar deposits being delivered in the London interbank market for a term of one month commencing that day or (ii) if such published rate is not available at such time for any reason, the rate per annum determined by the Agent to be the rate at which deposits in Dollars for delivery on the date of determination in same day funds in the approximate amount of the Base Rate Loan being made or maintained and with a term equal to one month would be offered by Bank of America’s London Branch to major banks in the London interbank eurodollar market at their request at the date and time of determination.

(f)    The definition of “Revolving Termination Date” in Section 1.01 of the Credit Agreement is hereby amended and restated in its entirety as follows:

“Revolving Termination Date” means the earlier to occur of:

(a)    May 24, 2017; and

(b)    the date on which the Commitments terminate in accordance with the provisions of this Agreement.

(g)    Section 1.01 of the Credit Agreement is hereby amended by adding the following new definitions in the appropriate alphabetical order:

“First Amendment” means the First Amendment to Credit Agreement dated as of May 24, 2013, by and among the Company, the Banks party thereto, and the Agent.

“First Amendment Effective Date” means May 24, 2013.

(h)    Section 1.01 of the Credit Agreement is hereby amended by deleting the definition of “Restricted Payment Reduction” therein.

(i)    Section 3.02(a) of the Credit Agreement is hereby amended by deleting the reference to “law” in the first sentence thereof and replacing it with “Requirement of Law”.

(j)    Section 3.05 of the Credit Agreement is hereby amended and restated in its entirety as follows:

3.05    Inability to Determine Rates. If in connection with any request for an Offshore Rate Loan or a conversion to or continuation thereof, (a) the Agent determines that (i) Dollar deposits are not being offered to banks in the London interbank eurodollar market for the applicable amount and Interest Period of such Offshore Rate Loan or (ii) adequate and reasonable means do not exist for determining the Offshore Rate for any requested Interest Period with respect to a proposed Offshore Rate Loan or in connection with an existing or proposed Base Rate Loan, or (b) the Majority

Banks determine that for any reason the Offshore Rate for any requested Interest Period with respect to a proposed Offshore Rate Loan, does not adequately and fairly reflect the cost to such Banks of funding such Loan, the Agent will promptly so notify the Company and each Bank. Thereafter, (x) the obligation of the Banks to make or maintain Offshore Rate Loans shall be suspended (to the extent of the affected Offshore Rate Loans or Interest Periods) and (y) in the event of a determination described in the preceding sentence with respect to the Offshore Rate component of the Base Rate, the utilization of the Offshore Rate component in determining the Base Rate shall be suspended, in each case until the Agent (upon the instruction of the Majority Banks) revokes such notice. Upon receipt of such notice, the Company may revoke any pending request for a Borrowing of, conversion to or continuation of Offshore Rate Loan, or, failing that, will be deemed to have converted such request into a request for a Borrowing of Base Rate Loans in the amount specified therein.

(k)    Section 7.04(d) of the Credit Agreement is hereby amended and restated in its entirety as follows:

(d)    Investments incurred in order to consummate Acquisitions otherwise permitted hereunder, provided that (i) the Net Cash Consideration (if any) given for any such Acquisition, together with the Net Cash Consideration given for all prior Acquisitions consummated by the Company and its Subsidiaries after the Closing Date shall not exceed the Cash Acquisition Basket in any fiscal year; provided that unused portions of the Cash Acquisition Basket in respect of any fiscal year may be carried over to future years, but (A) in no case shall the aggregate amount of the Cash Acquisition Basket exceed $100,000,000 in any fiscal year and (B) after giving effect to any Acquisition, in no case shall the aggregate amount of all Net Cash Consideration given in respect of such Acquisition and all other Acquisitions previously consummated after the First Amendment Effective Date and permitted under this Section 7.04(d) exceed $165,000,000; (ii) such Acquisitions are undertaken in accordance with all applicable Requirements of Law; and (iii) the prior, effective written consent or approval to such Acquisition of the board of directors or equivalent governing body of the acquiree is obtained, provided that notwithstanding this clause (iii), if all of the consideration given for any such Acquisition is common stock of the Company or any Subsidiary, then the prior, effective written consent or approval to such Acquisition of the board of directors or equivalent governing body of the acquiree shall not be required hereby;

(l)    Section 7.10 of the Credit Agreement is hereby amended by (i) inserting the word “and” at the end of clause (e) thereof, (ii) deleting the “; and” at the end of clause (f) thereof and replacing it with “.” and (iii) deleting clause (g) in its entirety.

2.    Condition Precedent. This Agreement shall be effective upon the satisfaction of the following conditions precedent:

(a)    Counterparts of First Amendment. The Agent shall have received counterparts of this Agreement, which collectively shall have been duly executed on behalf of the Company, the Banks and the Agent.

(b)    Organization Documents, Resolutions, Etc. Receipt by the Agent of the following, each of which shall be originals or facsimiles (followed promptly by originals), in form and substance reasonably satisfactory to the Agent and its legal counsel:

(i)    a certificate of a Responsible Officer of the Company certifying that either (x) the Organization Documents of the Company have not been amended, supplemented,

modified or otherwise altered in any respect since the Closing Date or (y) the copies of the Organization Documents of the Company attached to such certificate are true and correct as of the First Amendment Effective Date;

(ii)    such certificates of resolutions or other action, incumbency certificates and/or other certificates of Responsible Officers of the Company as the Agent may require evidencing the identity, authority and capacity of each Responsible Officer thereof authorized to act as a Responsible Officer in connection with this Agreement and the transactions contemplated hereby; and

(iii)    such documents and certifications as the Agent may reasonably require to evidence that the Company is duly organized, formed or incorporated, and is validly existing, in good standing (to the extent applicable) and qualified to engage in business in its state of organization, formation or incorporation.

(c)    Legal Opinion. Receipt by the Agent of favorable opinions of legal counsel, addressed to the Agent and each Bank, dated as of the First Amendment Effective Date, and in form and substance satisfactory to the Agent.

(d)    Closing Certificate. Receipt by the Agent of a certificate signed by a Responsible Officer of the Company certifying that (i) the representations and warranties set forth in Article V of the Credit Agreement and in each other Loan Document are true and correct in all material respects as of the date hereof with the same effect as if made on and as of the date hereof, except to the extent such representations and warranties expressly relate to an earlier date, in which case they are true and correct as of such earlier date; provided that, if a representation and warranty is generally qualified as to materiality, with respect to such representation and warranty the applicable materiality qualifier set forth above shall be disregarded for purposes of this certification and (ii) no Default or Event of Default exists or shall result from entering into this Agreement.

(e)    Fees. Receipt by the Agent and the Banks of any fees required to be paid on or before the First Amendment Effective Date.

(f)    Attorney Costs. The Company shall have paid all reasonable fees, charges and disbursements of counsel to the Agent to the extent invoiced prior to the First Amendment Date.

3.    Miscellaneous.

(a)    Except as otherwise modified by this Agreement, the Credit Agreement and the obligations of the Company thereunder and under the other Loan Documents, are hereby ratified and confirmed and shall remain in full force and effect according to their terms. This Agreement is a Loan Document.

(b)    The Company hereby represents and warrants as follows:

(i)    The Company has taken all necessary corporate action to authorize the execution, delivery and performance of this Agreement.

(ii)    This Agreement has been duly executed and delivered by the Company and constitutes the Company’s legal, valid and binding obligations, enforceable against the

Company in accordance with its terms, except as such enforceability may be limited by Debtor Relief Laws affecting the enforcement of creditors’ rights or general principles of equity (regardless of whether such enforceability is considered in a proceeding in equity or at law).

(iii)    No consent, approval, exemption, authorization or other action by, or notice to, or filing with, any Governmental Authority is necessary or required in connection with the execution, delivery or performance by the Company of this Agreement.

(iv)    The execution, delivery and performance by the Company of this Agreement do not and will not conflict with or result in any breach or contravention of, or the creation of any Lien under, any document evidencing any Contractual Obligation to which the Company is a party or any order, injunction, writ or decree of any Governmental Authority to which the Company or its property is subject, except where such conflict, breach, contravention or creation is not reasonably expected to have a Material Adverse Effect.

(c)    The Company represents and warrants to the Banks that after giving effect to this Agreement (i) the representations and warranties set forth in Article V of the Credit Agreement and in each other Loan Document are true and correct in all material respects as of the date hereof with the same effect as if made on and as of the date hereof, except to the extent such representations and warranties expressly relate to an earlier date, in which case they are true and correct as of such earlier date; provided that, if a representation and warranty is generally qualified as to materiality, with respect to such representation and warranty the applicable materiality qualifier set forth above shall be disregarded for purposes of this Section 3(c) and (ii) no Default or Event of Default exists or shall result from entering into this Agreement.

(d)    This Agreement may be executed in any number of counterparts, each of which when so executed and delivered shall be an original, but all of which shall constitute one and the same instrument. Delivery of an executed counterpart of this Agreement by telecopy or electronic mail shall be effective as an original and shall constitute a representation that an executed original shall be delivered.

(e)    THIS AGREEMENT AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES HEREUNDER SHALL BE GOVERNED BY, AND CONSTRUED AND INTERPRETED IN ACCORDANCE WITH, THE LAW OF THE STATE OF CALIFORNIA, WITHOUT REGARD TO CONFLICT OF LAW PRINCIPLES THAT WOULD REQUIRE APPLICATION OF ANOTHER LAW; PROVIDED THAT THE AGENT AND THE BANKS SHALL RETAIN ALL RIGHTS ARISING UNDER FEDERAL LAW.

[remainder of page intentionally left blank]

Each of the parties hereto has caused a counterpart of this Agreement to be duly executed and delivered as of the date first above written.

COMPANY:            MENTOR GRAPHICS CORPORATION

By:/S/ETHAN MANUEL        

Name: Ethan Manuel

Title: Treasurer

By:/S/DEAN FREED            

Name: Dean Freed

Title: Vice President

FIRST AMENDMENT TO CREDIT AGREEMENT

MENTOR GRAPHICS CORPORATION

AGENT:            BANK OF AMERICA, N.A.,

as Agent

By:/S/ERIK M. TRUETTE        

Name: Erik M. Truette

Title: Assistant Vice President

FIRST AMENDMENT TO CREDIT AGREEMENT

MENTOR GRAPHICS CORPORATION

BANKS:            BANK OF AMERICA, N.A.,

as a Bank

By:/S/THUY U. BUI            

Name: Thuy U. Bui

Title: Vice President

FIRST AMENDMENT TO CREDIT AGREEMENT

MENTOR GRAPHICS CORPORATION

BANKS:            KEYBANK NATIONAL ASSOCIATION,

as a Bank

By:/S/ROBERT W. BOSWELL        

Name: Robert W. Boswell

Title: Senior Vice President

FIRST AMENDMENT TO CREDIT AGREEMENT

MENTOR GRAPHICS CORPORATION

BANKS:            HSBC BANK USA N.A.,

as a Bank

By:/S/MIKE A. MITCHELL        

Name: Mike A. Mitchell

Title: Vice President

FIRST AMENDMENT TO CREDIT AGREEMENT

MENTOR GRAPHICS CORPORATION

BANKS:            U.S. BANK, NATIONAL ASSOCIATION,

as a Bank

By:/S/MARK D. RODGERS        

Name: Mark D. Rodgers

Title: Assistant Vice President

FIRST AMENDMENT TO CREDIT AGREEMENT

MENTOR GRAPHICS CORPORATION

BANKS:            CITIBANK, N.A.,

as a Bank

By:/S/SEAN KLIMCHALK        

Name: Sean Klimchalk

Title: Vice President

FIRST AMENDMENT TO CREDIT AGREEMENT

MENTOR GRAPHICS CORPORATION

EX-31.1

Exhibit 31.1

CERTIFICATIONS

I, Walden C. Rhines, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Mentor Graphics Corporation, the registrant;

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 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 we 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 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 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.

Dated: June 5, 2013

/S/ WALDEN C. RHINES

Walden C. Rhines

Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATIONS

I, Gregory K. Hinckley, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Mentor Graphics Corporation, the registrant;

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 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 we 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 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 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.

Dated: June 5, 2013

/S/ GREGORY K. HINCKLEY

Gregory K. Hinckley

President, Chief Financial Officer

EX-32

Exhibit 32

Certification of Periodic Financial Report Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Pursuant to 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Mentor Graphics Corporation (the “Company”) hereby certifies to such officer’s knowledge that:

(i) the Quarterly Report on Form 10-Q of the Company for the quarter ended April 30, 2013 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: June 5, 2013

/S/ WALDEN C. RHINES

Walden C. Rhines

Chief Executive Officer

The foregoing certification is being furnished solely to accompany the Report pursuant to 18 U.S.C. § 1350, and is not being filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and is not to be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing. A signed original of this written statement required by Section 906 has been provided to Mentor Graphics Corporation and will be retained by Mentor Graphics Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

Certification of Periodic Financial Report Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Pursuant to 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of Mentor Graphics Corporation (the “Company”) hereby certifies to such officer’s knowledge that:

(i) the Quarterly Report on Form 10-Q of the Company for the quarter ended April 30, 2013 (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: June 5, 2013

/S/ GREGORY K. HINCKLEY

Gregory K. Hinckley

President, Chief Financial Officer

The foregoing certification is being furnished solely to accompany the Report pursuant to 18 U.S.C. § 1350, and is not being filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and is not to be incorporated by reference into any filing of the Company, whether made before or after the date hereof, regardless of any general incorporation language in such filing. A signed original of this written statement required by Section 906 has been provided to Mentor Graphics Corporation and will be retained by Mentor Graphics Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

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Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Notes)

3 Months Ended

Apr. 30, 2013

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Comprehensive Income (Loss) Note [Text Block]

Accumulated Other Comprehensive Income—The following table summarizes the components of accumulated other comprehensive income:

As of	April 30, 2013			January 31, 2013
Foreign currency translation adjustment	$	19,786		$	25,146
Unrealized loss on derivatives	(23		)	(12		)
Pension liability	263			265
Total accumulated other comprehensive income	$	20,026		$	25,399

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Notes Payable - Additional Information (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2011
Debt Instrument [Line Items]
Interest rate			4.00%
4.00% Debentures due 2031 | Convertible Subordinated Debt
Debt Instrument [Line Items]
Debt instrument amortization end date	2018-03
Issued debt			$ 253,000
Convertible debentures to common stock, conversion price	$ 20.538
Convertible debentures to common stock, total number of share	12,319
Market price of common stock exceeding percent of the conversion price	120.00%
Market price of debentures declining to maximum percent of the value of the common stock	98.00%
Effective Interest Rate	7.25%	7.25%
Holder optional redemption period 1 [Member] | 4.00% Debentures due 2031 | Convertible Subordinated Debt
Debt Instrument [Line Items]
Debentures redemption price	100.00%
Holder optional redemption period 2 [Member] | 4.00% Debentures due 2031 | Convertible Subordinated Debt
Debt Instrument [Line Items]
Debentures redemption price	100.00%
Holder optional redemption period 3 [Member] | 4.00% Debentures due 2031 | Convertible Subordinated Debt
Debt Instrument [Line Items]
Debentures redemption price	100.00%

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Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Apr. 30, 2013	Jan. 31, 2013
Current assets:
Cash and cash equivalents	$ 198,380	$ 223,783
Short-term investments	7,833	0
Trade accounts receivable, net of allowance for doubtful accounts of $4,752 as of April 30, 2013 and $5,331 as of January 31, 2013	367,389	412,245
Other receivables	9,446	10,974
Inventory	24,141	18,036
Prepaid expenses and other	28,198	24,941
Deferred income taxes	9,538	14,973
Total current assets	644,925	704,952
Property, plant, and equipment, net of accumulated depreciation of $305,768 as of April 30, 2013 and $300,914 as of January 31, 2013	160,192	162,402
Term receivables	228,425	250,497
Goodwill	537,357	535,932
Intangible assets, net of accumulated amortization of $188,794 as of April 30, 2013 and $186,060 as of January 31, 2013	20,075	21,838
Other assets	72,298	69,663
Total assets	1,663,272	1,745,284
Current liabilities:
Short-term borrowings	1,060	5,964
Accounts payable	14,753	20,906
Income taxes payable	4,238	9,180
Accrued payroll and related liabilities	56,502	101,354
Accrued and other liabilities	36,729	40,662
Deferred revenue	234,041	233,759
Total current liabilities	347,323	411,825
Notes payable	219,937	218,546
Deferred revenue	16,064	17,755
Income tax liability	22,770	22,663
Other long-term liabilities	25,636	28,318
Total liabilities	631,730	699,107
Commitments and contingencies (Note 7)
Noncontrolling interest with redemption feature	11,649	12,698
Stockholders' equity:
Common stock, no par value, 300,000 shares authorized as of April 30, 2013 and January 31, 2013; 112,599 shares issued and outstanding as of April 30, 2013 and 112,902 shares issued and outstanding as of January 31, 2013	807,080	810,902
Retained earnings	192,787	197,178
Accumulated other comprehensive income	20,026	25,399
Total stockholders' equity	1,019,893	1,033,479
Total liabilities and stockholders' equity	$ 1,663,272	$ 1,745,284

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Term Receivables and Trade Accounts Receivable

3 Months Ended

Apr. 30, 2013

Term Receivables and Trade Accounts Receivable [Abstract]

Term Receivables and Trade Accounts Receivable

Term Receivables and Trade Accounts Receivable—We have long-term installment receivables that are attributable to multi-year, multi-element term license sales agreements. We include balances under term agreements that are due within one year in trade accounts receivable, net and balances that are due more than one year from the balance sheet date in term receivables, long-term. We discount the total product portion of the agreements to reflect the interest component of the transaction. We amortize the interest component of the transaction, using the effective interest method, to system and software revenues over the period in which payments are made and balances are outstanding. We determine the discount rate at the outset of the arrangement based upon the current credit rating of the customer. We reset the discount rate periodically considering changes in prevailing interest rates but do not adjust previously discounted balances.

Term receivable and trade accounts receivable balances were as follows:

As of	April 30, 2013		January 31, 2013
Trade accounts receivable	$	125,969	$	178,351
Term receivables, short-term	$	241,420	$	233,894
Term receivables, long-term	$	228,425	$	250,497

Trade accounts receivable include billed amounts whereas term receivables, short-term are comprised of unbilled amounts. Term receivables, short-term represent the portion of long-term installment agreements that are due within one year. Billings for term agreements typically occur 30 days prior to the contractual due date, in accordance with individual contract installment terms. Term receivables, long-term represent unbilled amounts which are scheduled to be collected beyond one year.

We perform a credit risk assessment of all customers using the Standard & Poor’s (S&P) credit rating as our primary credit-quality indicator. The S&P credit ratings are based on the most recent S&P score available. For customers that do not have an S&P credit rating, we base our credit risk assessment on an internal credit assessment which is based on selected short-term financial ratios. Our internal credit assessment is based upon results provided in the customers’ most recent financial statements. We determine whether or not to extend credit to these customers based on the results of our internal credit assessment, thus, mitigating our risk of loss.

The credit risk assessment for our long-term receivables was as follows:

As of	April 30, 2013		January 31, 2013
S&P credit rating:
AAA+ through BBB-	$	131,007	$	133,773
BB+ and lower	35,275		45,298
	166,282		179,071
Internal credit assessment	62,143		71,426
Total long-term term receivables	$	228,425	$	250,497

We maintain allowances for doubtful accounts on trade accounts receivable and term receivables for estimated losses resulting from the inability of our customers to make required payments. We regularly evaluate the collectibility of our trade accounts receivable based on a combination of factors. When we become aware of a specific customer’s inability to meet its financial obligations, such as in the case of bankruptcy or deterioration in the customer’s operating results, financial position, or credit rating, we record a specific reserve for bad debt to reduce the related receivable to the amount believed to be collectible. We also record unspecified reserves for bad debt for all other customers based on a variety of factors including length of time the receivables are past due, the financial health of the customers, the current business environment, and historical experience. Current economic conditions we consider include forecasted spending in the semiconductor industry, consumer spending for electronics, integrated circuit research and development spending, and volatility in gross domestic product. If these factors change or circumstances related to specific customers change, we adjust the estimates of the recoverability of receivables resulting in either additional selling expense or a reduction in selling expense in the period such determination is made.

The following shows the change in allowance for doubtful accounts:

Allowance for doubtful accounts	Beginning balance		Expense adjustment			Other deductions(1)			Ending balance
Three months ended April 30, 2013	$	5,331	$	(500	)	$	(79	)	$	4,752
Three months ended April 30, 2012	$	4,432	$	153		$	(48	)	$	4,537

(1)Specific account write-offs and foreign exchange.

We enter into agreements to sell qualifying accounts receivable from time to time to certain financing institutions on a non-recourse basis. We received net proceeds from the sale of receivables of $8,535 for the three months ended April 30, 2013 compared to $7,457 for the three months ended April 30, 2012. Amounts collected from customers on accounts receivable previously sold on a non-recourse basis to financial institutions are included in short-term borrowings on the balance sheet. These amounts are remitted to the financial institutions in the month following quarter-end.

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Fair Value Measurement Fair Value Measurement (Policies)

3 Months Ended

Apr. 30, 2013

Fair Value Disclosures [Abstract]

Fair value of financial instruments

The FASB's authoritative guidance for the hierarchy of valuation techniques is based on whether the inputs to those valuation techniques are observable or unobservable. Observable inputs reflect market data obtained from independent sources. Unobservable inputs reflect our market assumptions. The fair value hierarchy consists of the following three levels:

•Level 1—Quoted prices for identical instruments in active markets;

• Level 2—Quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-derived valuations whose significant inputs are observable; and

•Level 3—One or more significant inputs to the valuation model are unobservable.

Short term investments fair value determination

We based the fair value of bank certificates of deposit included in short-term investments on quoted market prices for similar instruments in markets that are not active (Level 2).

Business combination contingent consideration

In connection with certain acquisitions, payment of a portion of the purchase price is contingent typically upon the acquired business’ achievement of certain revenue goals. As of April 30, 2013, of the total recorded balance, $1,540 was included in accrued and other liabilities and $2,800 was included in other long-term liabilities on our condensed consolidated balance sheet. As of January 31, 2013, of the total recorded balance, $1,197 was included in accrued and other liabilities and $4,819 was included in other long-term liabilities on our condensed consolidated balance sheet.

We have estimated the fair value of our contingent consideration as the present value of the expected payments over the term of the arrangements.

Notes payable fair value determination

We based the fair value of notes payable on the quoted market price or rates available to us for instruments with similar terms and maturities (Level 2).

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Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Jan. 31, 2013
Disclosure Income Taxes Additional Information [Abstract]
Effective tax rate	381.00%	3.00%
Period specific items benefit	$ 360
Effective income tax rate forecast	13.00%
U.S. federal statutory rate	35.00%
Income taxes associated with uncertain income tax positions	28,305
Liability for uncertain tax positions, current	5,535
Income tax liability	$ 22,770		$ 22,663

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Incentive Stock Rights - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended
	May 24, 2013	Apr. 30, 2013	Jan. 31, 2012	Jul. 31, 2010	Jun. 24, 2010
Disclosure Incentive Stock Rights Additional Information [Abstract]
Incentive stock purchase right adoption date				Jun. 24, 2010
Dividend distribution of rights declared for each outstanding share of common stock					1
Dividends Payable, Date of Record	Jun. 10, 2013	Mar. 22, 2013		Jul. 06, 2010
Incentive stock purchase right amendment date			Dec. 23, 2011
Class of warrant or right issuable with each new share of common stock		1
Number of shares called by rights		0.0001
Incentive stock purchase price		$ 65
Percentage of common stock acquired to initiate exercise of incentive stock rights, minimum		15.00%
Percent of incentive stock right exercise price for value of the entity's common stock received upon exercise of incentive stock right		200.00%
Percent of incentive stock right exercise price for value of acquiring company's common stock received upon exercise of incentive stock right		200.00%
Date on which rights expire		Jun. 30, 2013
Rights redemption price		$ 0.001

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Special Charges

3 Months Ended

Apr. 30, 2013

Restructuring and Related Activities [Abstract]

Special Charges

Special Charges—The following is a summary of the components of special charges:

Three months ended April 30,	2013		2012
Employee severance and related costs	$	2,079	$	988
Other costs, net	4		159
Total special charges	$	2,083	$	1,147

Special charges primarily consist of costs incurred for employee terminations due to a reduction of personnel resources driven by modifications of business strategy or business emphasis. Employee severance and related costs include severance benefits, notice pay, and outplacement services. These rebalance charges generally represent the aggregate of numerous unrelated rebalance plans which impact several employee groups, none of which is individually material to our financial position or results of operations. We determine termination benefits based on employee status, years of service, and local statutory requirements. We communicate termination benefits to the affected employees prior to the end of the quarter in which we record the charge. Special charges may also include expenses incurred related to acquisitions, excess facility costs, and asset related charges.

Approximately 26% of the employee severance and related costs for the three months ended April 30, 2013 were paid during the period. We expect to pay the remainder during the fiscal year ending January 31, 2014. Substantially all of the employee severance and related costs for the three months ended April 30, 2012 were paid during the fiscal year ending January 31, 2013. There have been no significant modifications to the amount of these charges.

Accrued special charges are included in accrued and other liabilities and other long-term liabilities in the condensed consolidated balance sheets. The following table shows changes in accrued special charges during the three months ended April 30, 2013:

	Accrued special charges as of		Charges during the three months ended		Adjustments (payments) during the three months ended			Accrued special charges as of
	January 31, 2013		April 30, 2013		April 30, 2013			April 30, 2013		(1	)
Employee severance and related costs	$	2,028	$	2,079	$	(2,119	)	$	1,988
Other costs, net	2,889		4		244			3,137
Total accrued special charges	$	4,917	$	2,083	$	(1,875	)	$	5,125

⁽¹⁾  Of the $5,125 total accrued special charges as of April 30, 2013, $2,110 represents the long-term portion, which primarily includes accrued lease termination fees and other facility costs, net of sublease income and other long-term costs. The remaining balance of $3,015 represents the short-term portion of accrued special charges.

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Term Receivables and Trade Accounts Receivable - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Disclosure Term Receivables And Trade Accounts Receivable Additional Information [Abstract]
Billing period	30 days
Net proceeds from sale of receivables	$ 8,535	$ 7,457

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Net Income Per Share - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Disclosure Net Income Loss Per Share Additional Information [Abstract]
Shares of common stock excluded from the computation of diluted net income per share (in shares)	1,188	3,022
Non-controlling interest adjustment to redemption value	$ 468	$ 0

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Supplemental Cash Flow Information (Tables)

3 Months Ended

Apr. 30, 2013

Supplemental Cash Flow Information [Abstract]

Information Concerning Supplemental Disclosures of Cash Flow Activities

The following provides information concerning supplemental disclosures of cash flow activities:

Three months ended April 30,	2013		2012
Cash paid, net for:
Interest	$	5,551	$	5,400
Income taxes	$	4,055	$	2,723

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Special Charges Restructuring and related activities (Policies)

3 Months Ended

Apr. 30, 2013

Restructuring and Related Activities [Abstract]

Costs associated with exit or disposal activities or restructurings

Special charges primarily consist of costs incurred for employee terminations due to a reduction of personnel resources driven by modifications of business strategy or business emphasis. Employee severance and related costs include severance benefits, notice pay, and outplacement services. These rebalance charges generally represent the aggregate of numerous unrelated rebalance plans which impact several employee groups, none of which is individually material to our financial position or results of operations. We determine termination benefits based on employee status, years of service, and local statutory requirements. We communicate termination benefits to the affected employees prior to the end of the quarter in which we record the charge. Special charges may also include expenses incurred related to acquisitions, excess facility costs, and asset related charges.

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Commitments and Contingencies Commitments and Contingencies (Policies)

3 Months Ended

Apr. 30, 2013

Commitments and Contingencies Disclosure [Abstract]

Commitments and contingencies policy

When we consider the potential loss from any dispute or legal matter probable and the amount or the range of loss can be estimated, we will accrue a liability for the estimated loss. Legal proceedings are subject to uncertainties, and the outcomes are difficult to predict. Because of such uncertainties, we base accruals on the best information available at the time. As additional information becomes available, we reassess the potential liability related to pending claims and litigation matters and may revise estimates.

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Credit Risk Assessment for Long-term Receivables (Detail) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2013	Jan. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term receivables, long-term	$ 228,425	$ 250,497
S&P credit rating, AAA+ through BBB-
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term receivables, long-term	131,007	133,773
S&P credit rating, BB+ and lower
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term receivables, long-term	35,275	45,298
S&P credit rating
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term receivables, long-term	166,282	179,071
Internal Credit Rating [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Term receivables, long-term	$ 62,143	$ 71,426

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Special Charges (Tables)

3 Months Ended

Apr. 30, 2013

Restructuring and Related Activities [Abstract]

Summary of the components of the special charges

The following is a summary of the components of special charges:

Three months ended April 30,	2013		2012
Employee severance and related costs	$	2,079	$	988
Other costs, net	4		159
Total special charges	$	2,083	$	1,147

Changes in accrued special charges

The following table shows changes in accrued special charges during the three months ended April 30, 2013:

	Accrued special charges as of		Charges during the three months ended		Adjustments (payments) during the three months ended			Accrued special charges as of
	January 31, 2013		April 30, 2013		April 30, 2013			April 30, 2013		(1	)
Employee severance and related costs	$	2,028	$	2,079	$	(2,119	)	$	1,988
Other costs, net	2,889		4		244			3,137
Total accrued special charges	$	4,917	$	2,083	$	(1,875	)	$	5,125

⁽¹⁾  Of the $5,125 total accrued special charges as of April 30, 2013, $2,110 represents the long-term portion, which primarily includes accrued lease termination fees and other facility costs, net of sublease income and other long-term costs. The remaining balance of $3,015 represents the short-term portion of accrued special charges.

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Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2013	Jan. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	$ 7,833	$ 0
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	7,833
Contingent consideration	(4,340)	(6,016)
Total	3,493
Level 1 | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0
Contingent consideration	0	0
Total	0
Level 2 | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	7,833
Contingent consideration	0	0
Total	7,833
Level 3 | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0
Contingent consideration	(4,340)	(6,016)
Total	$ (4,340)

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Short-Term Borrowings - Additional Information (Detail) (Revolving Credit Facility [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	0 Months Ended				0 Months Ended
	Apr. 30, 2013	May 24, 2013 Subsequent Event [Member]	May 24, 2013 Minimum [Member] Subsequent Event [Member]	May 24, 2013 Minimum [Member] L I B O R [Member] Subsequent Event [Member]	May 24, 2013 Minimum [Member] Base Rate [Member] Subsequent Event [Member]	May 24, 2013 Maximum [Member] Subsequent Event [Member]	May 24, 2013 Maximum [Member] L I B O R [Member] Subsequent Event [Member]	May 24, 2013 Maximum [Member] Base Rate [Member] Subsequent Event [Member]
Line of Credit Facility [Line Items]
Term of revolving credit facility	4 years
Termination date for senior, unsecured revolving credit facility	Apr. 27, 2015	May 24, 2017
Revolving credit facility, maximum borrowing capacity	$ 125,000
Debt Instrument, Basis Spread on Variable Rate				2.00%	1.00%		2.50%	1.50%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage			0.30%			0.40%
Credit facility limits, aggregate amount available for dividend and repurchase of stock	$ 50,000
Credit facility limits, aggregate amount available for dividend and repurchase of stock, percentage of cumulative net income	70.00%

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Employee Stock and Savings Plans (Tables)

3 Months Ended

Apr. 30, 2013

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

Stock Compensation Expense Recognized

The following table summarizes stock-based compensation expense recognized:

Three months ended April 30,	2013		2012
Cost of revenues	$	460	$	319
Operating expenses:
Research and development	2,610		2,117
Marketing and selling	1,882		1,549
General and administration	1,614		1,162
Equity plan-related compensation expense	$	6,566	$	5,147

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Revenue Recognized from Related Party (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Related Party Transaction [Line Items]
Revenue from related parties	$ 28,536	$ 9,002
Percentage of related party revenue	12.60%	3.60%

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Segment Reporting Revenues Related to Operations in Geographic Regions (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Revenues:
Total revenues	$ 226,515	$ 247,918
North America [Member]
Revenues:
Total revenues	99,140	129,110
Europe [Member]
Revenues:
Total revenues	48,707	52,631
JAPAN
Revenues:
Total revenues	26,677	24,983
Pacific Rim [Member]
Revenues:
Total revenues	$ 51,991	$ 41,194

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Other Income (Expense), Net (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Component of Other Expense, Nonoperating [Line Items]
Interest income	$ 625	$ 475
Foreign currency exchange loss	(1,375)	(215)
Other, net	(209)	(177)
Other income (expense), net	$ (959)	$ 83

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Summary of Fair Value and Carrying Value of Notes Payable (Detail) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2013	Jan. 31, 2013
Disclosure Summary Of Fair Value And Carrying Value Of Notes Payable [Abstract]
Fair value of notes payable	$ 300,438	$ 293,867
Carrying value of notes payable	$ 219,937	$ 218,546

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Supplemental Cash Flow Information - Additional Information (Detail) (Frontline, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Frontline
Schedule of Cash Flow, Supplemental [Line Items]
Returns received on investment	$ 1,500	$ 950

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Term Receivables and Trade Accounts Receivable Term Receivables and Trade Accounts Receivable (Policies)

3 Months Ended

Apr. 30, 2013

Term Receivables and Trade Accounts Receivable [Abstract]

Receivables policy

We include balances under term agreements that are due within one year in trade accounts receivable, net and balances that are due more than one year from the balance sheet date in term receivables, long-term. We discount the total product portion of the agreements to reflect the interest component of the transaction. We amortize the interest component of the transaction, using the effective interest method, to system and software revenues over the period in which payments are made and balances are outstanding. We determine the discount rate at the outset of the arrangement based upon the current credit rating of the customer. We reset the discount rate periodically considering changes in prevailing interest rates but do not adjust previously discounted balances.

Trade and other accounts receivable, unbilled receivables

Trade accounts receivable include billed amounts whereas term receivables, short-term are comprised of unbilled amounts. Term receivables, short-term represent the portion of long-term installment agreements that are due within one year. Billings for term agreements typically occur 30 days prior to the contractual due date, in accordance with individual contract installment terms. Term receivables, long-term represent unbilled amounts which are scheduled to be collected beyond one year.

Financing receivable credit quality

We perform a credit risk assessment of all customers using the Standard & Poor’s (S&P) credit rating as our primary credit-quality indicator. The S&P credit ratings are based on the most recent S&P score available. For customers that do not have an S&P credit rating, we base our credit risk assessment on an internal credit assessment which is based on selected short-term financial ratios. Our internal credit assessment is based upon results provided in the customers’ most recent financial statements.

Allowance for doubtful accounts

We maintain allowances for doubtful accounts on trade accounts receivable and term receivables for estimated losses resulting from the inability of our customers to make required payments. We regularly evaluate the collectibility of our trade accounts receivable based on a combination of factors. When we become aware of a specific customer’s inability to meet its financial obligations, such as in the case of bankruptcy or deterioration in the customer’s operating results, financial position, or credit rating, we record a specific reserve for bad debt to reduce the related receivable to the amount believed to be collectible. We also record unspecified reserves for bad debt for all other customers based on a variety of factors including length of time the receivables are past due, the financial health of the customers, the current business environment, and historical experience. Current economic conditions we consider include forecasted spending in the semiconductor industry, consumer spending for electronics, integrated circuit research and development spending, and volatility in gross domestic product. If these factors change or circumstances related to specific customers change, we adjust the estimates of the recoverability of receivables resulting in either additional selling expense or a reduction in selling expense in the period such determination is made.

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Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Operating Cash Flows:
Net income (loss)	$ (419)	$ 27,530
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization of property, plant, and equipment	8,790	8,331
Amortization of intangible assets and debt costs	4,554	5,482
Stock-based compensation	6,566	5,147
Deferred income taxes	5,104	837
Changes in other long-term liabilities	(1,890)	348
Dividends received from unconsolidated entities, net of equity in income (loss)	1,052	350
Other	(22)	18
Changes in operating assets and liabilities, net of effect of acquired businesses:
Trade accounts receivable, net	42,176	90
Prepaid expenses and other	(14,813)	(2,047)
Term receivables, long-term	20,266	7,710
Accounts payable and accrued liabilities	(54,472)	(60,066)
Income taxes payable	(4,792)	(1,996)
Deferred revenue	27	14,411
Net cash provided by operating activities	12,127	6,145
Investing Cash Flows:
Purchases of short-term investments	(7,820)	0
Purchases of property, plant, and equipment	(4,410)	(11,604)
Acquisitions of businesses and equity interests, net of cash acquired	(2,928)	(453)
Net cash used in investing activities	(15,158)	(12,057)
Financing Cash Flows:
Proceeds from issuance of common stock	9,609	3,567
Repurchase of common stock	(19,995)	0
Tax benefit from share options exercised	0	139
Payments of dividends	(5,064)	0
Net decrease in short-term borrowings	(4,827)	(6,069)
Repayments of Other Long-term Debt	(1,131)	(1,871)
Net cash used in financing activities	(21,408)	(4,234)
Effect of exchange rate changes on cash and cash equivalents	(964)	(1,542)
Net change in cash and cash equivalents	(25,403)	(11,688)
Cash and cash equivalents at the beginning of the period	223,783	146,499
Cash and cash equivalents at the end of the period	$ 198,380	$ 134,811

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Recent Accounting Pronouncements Recent Accounting Pronouncements

3 Months Ended

Apr. 30, 2013

Recent Accounting Pronouncements [Abstract]

New Accounting Pronouncements and Changes in Accounting Principles

(2)Recent Accounting Pronouncements—In February 2013, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2013-02, "Comprehensive Income (Topic 220) Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income," to improve the reporting of reclassifications out of accumulated other comprehensive income (AOCI), which clarified the reclassification requirements of ASU 2011-05, "Comprehensive Income (Topic 220) Presentation of Comprehensive Income." This new guidance requires entities to present (either on the face of the income statement or in the notes) significant amounts reclassified out of AOCI and their effect on income statement line items. This guidance is effective for interim and annual reporting periods beginning after December 15, 2012. The Company adopted this guidance on February 1, 2013 and has made the required additional disclosures.

In December 2011, the FASB issued ASU 2011-11, “Balance Sheet (Topic 210) Disclosures about Offsetting Assets and Liabilities.” ASU 2011-11 requires entities to disclose both gross information and net information about both instruments and transactions subject to a master netting arrangement. ASU 2011-11 is intended to facilitate comparison between those entities that prepare their financial statements on the basis of U.S. GAAP and those entities that prepare their financial statements on the basis of International Financial Reporting Standards. We adopted this new guidance beginning February 1, 2013. Adoption of this new guidance did not have a material impact on our financial statements.

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Short-Term Borrowings

3 Months Ended

Apr. 30, 2013

Short-term Debt [Abstract]

Short-Term Borrowings

Short-Term Borrowings—In April 2011, we entered into a syndicated, senior, unsecured, four-year revolving credit facility that was originally scheduled to terminate on April 27, 2015. On May 24, 2013, we amended the facility to, among other things, extend the termination date to May 24, 2017.

The revolving credit facility has a maximum borrowing capacity of $125,000. Under the amendment, we have the option to pay interest based on:

(i) London Interbank Offered Rate (LIBOR) with varying maturities commensurate with the borrowing period we select, plus a spread of between 2.00% and 2.50% based on a pricing grid tied to a financial covenant; or

(ii) A base rate plus a spread of between 1.00% and 1.50%, based on a pricing grid tied to a financial covenant.

As a result of these interest rate options, our interest expense associated with borrowings under this revolving credit facility will vary with market interest rates. In addition, commitment fees are payable on the unused portion of the revolving credit facility at rates between 0.30% and 0.40% based on a pricing grid tied to a financial covenant. We had no borrowings against the revolving credit facility during the three months ended April 30, 2013 and 2012.

This revolving credit facility contains certain financial and other covenants, including a limit on the aggregate amount we can pay for dividends and repurchases of our stock over the term of the facility of $50,000 plus 70% of our cumulative net income.

We were in compliance with all financial covenants as of April 30, 2013. If we fail to comply with the financial covenants and do not obtain a waiver from our lenders, we would be in default under the revolving credit facility and our lenders could terminate the facility and demand immediate repayment of all outstanding loans under the revolving credit facility.

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Fair Value Measurement

3 Months Ended

Apr. 30, 2013

Fair Value Disclosures [Abstract]

Fair Value Measurement

Fair Value Measurement— The following table presents information about financial assets and liabilities measured at fair value on a recurring basis as of April 30, 2013:

	Fair Value			Level 1		Level 2		Level 3
Bank certificates of deposit	$	7,833		$	—	$	7,833	$	—
Contingent consideration	(4,340		)	—		—		(4,340		)
Total	$	3,493		$	—	$	7,833	$	(4,340	)

The following table presents information about financial assets and liabilities measured at fair value on a recurring basis as of January 31, 2013:

	Fair Value			Level 1		Level 2		Level 3
Contingent consideration	$	(6,016	)	$	—	$	—	$	(6,016	)

The FASB's authoritative guidance for the hierarchy of valuation techniques is based on whether the inputs to those valuation techniques are observable or unobservable. Observable inputs reflect market data obtained from independent sources. Unobservable inputs reflect our market assumptions. The fair value hierarchy consists of the following three levels:

•Level 1—Quoted prices for identical instruments in active markets;

• Level 2—Quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active, and model-derived valuations whose significant inputs are observable; and

•Level 3—One or more significant inputs to the valuation model are unobservable.

We based the fair value of bank certificates of deposit included in short-term investments on quoted market prices for similar instruments in markets that are not active (Level 2).

In connection with certain acquisitions, payment of a portion of the purchase price is contingent typically upon the acquired business’ achievement of certain revenue goals. As of April 30, 2013, of the total recorded balance, $1,540 was included in accrued and other liabilities and $2,800 was included in other long-term liabilities on our condensed consolidated balance sheet. As of January 31, 2013, of the total recorded balance, $1,197 was included in accrued and other liabilities and $4,819 was included in other long-term liabilities on our condensed consolidated balance sheet.

We have estimated the fair value of our contingent consideration as the present value of the expected payments over the term of the arrangements. The fair value measurement of our contingent consideration as of April 30, 2013 encompasses the following significant unobservable inputs:

Unobservable Inputs	Range
Total estimated contingent consideration	$0	-	$5,733
Discount rate	14%	-	16%
Timing of cash flows (in years)	0	-	5

Changes in the fair value of our contingent consideration are primarily driven by changes in the estimated amount and timing of payments, resulting from changes in the forecasted revenues of the acquired businesses. Significant changes in any of the inputs in isolation could result in a fluctuation in the fair value measurement of contingent consideration. Changes in fair value are recognized in special charges in our condensed consolidated statement of income in the period in which the change is identified.

The following table summarizes contingent consideration activity:

Balance as of January 31, 2013	$	6,016
Payments	(1,131		)
Adjustments	(603		)
Interest accretion	58
Balance as of April 30, 2013	$	4,340

The following table summarizes the fair value and carrying value of notes payable:

As of	April 30, 2013		January 31, 2013
Fair value of notes payable	$	300,438	$	293,867
Carrying value of notes payable	$	219,937	$	218,546

We based the fair value of notes payable on the quoted market price or rates available to us for instruments with similar terms and maturities (Level 2). Of the total carrying value of notes payable, there was none classified as current on our condensed consolidated balance sheet as of April 30, 2013 and January 31, 2013.

The carrying amounts of cash equivalents, trade accounts receivable, net, term receivables, short-term borrowings, accounts payable, and accrued liabilities approximate fair value because of the short-term nature of these instruments or because amounts have been appropriately discounted.

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Fair Value Measurement Level 3 Unobservable Inputs (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2013
Unobservable Inputs [Abstract]
Total estimated contingent consideration, low	$ 0
Total estimated contingent consideration, high	$ 5,733
Discount rate, low	14.00%
Discount rate, high	16.00%
Timing of cash flows (in years), low	0
Timing of cash flows (in years), high	5

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Fair Value Measurement (Tables)

3 Months Ended

Apr. 30, 2013

Fair Value Disclosures [Abstract]

Financial assets and liabilities measured at fair value on a recurring basis

The following table presents information about financial assets and liabilities measured at fair value on a recurring basis as of April 30, 2013:

	Fair Value			Level 1		Level 2		Level 3
Bank certificates of deposit	$	7,833		$	—	$	7,833	$	—
Contingent consideration	(4,340		)	—		—		(4,340		)
Total	$	3,493		$	—	$	7,833	$	(4,340	)

The following table presents information about financial assets and liabilities measured at fair value on a recurring basis as of January 31, 2013:

	Fair Value			Level 1		Level 2		Level 3
Contingent consideration	$	(6,016	)	$	—	$	—	$	(6,016	)

Significant unobservable inputs

The fair value measurement of our contingent consideration as of April 30, 2013 encompasses the following significant unobservable inputs:

Unobservable Inputs	Range
Total estimated contingent consideration	$0	-	$5,733
Discount rate	14%	-	16%
Timing of cash flows (in years)	0	-	5

Summary of level 3 activity

The following table summarizes contingent consideration activity:

Balance as of January 31, 2013	$	6,016
Payments	(1,131		)
Adjustments	(603		)
Interest accretion	58
Balance as of April 30, 2013	$	4,340

Schedule of notes payable table

The following table summarizes the fair value and carrying value of notes payable:

As of	April 30, 2013		January 31, 2013
Fair value of notes payable	$	300,438	$	293,867
Carrying value of notes payable	$	219,937	$	218,546

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Net Income Per Share (Tables)

3 Months Ended

Apr. 30, 2013

Earnings Per Share [Abstract]

Computation of basic and diluted net income per share

The following provides the computation of basic and diluted net income per share:

Three months ended April 30,	2013		2012
Net income attributable to Mentor Graphics shareholders	$	205	$	28,182
Noncontrolling interest adjustment to redemption value	468		—
Adjusted net income attributable to Mentor Graphics shareholders	$	673	$	28,182
Weighted average common shares used to calculate basic net income per share	112,711		109,907
Employee stock options, restricted stock units, and employee stock purchase plan	3,040		3,336
Weighted average common and potential common shares used to calculate diluted net income per share	115,751		113,243
Net income per share attributable to Mentor Graphics shareholders:
Basic	$	0.01	$	0.26
Diluted	$	0.01	$	0.25

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Segment Reporting - Additional Information (Detail)	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Concentration Risk [Line Items]
Customers accounting for ten percent or more of net revenue	0	1
Customer concentration risk [Member] | Sales revenue, goods and services, net [Member]
Concentration Risk [Line Items]
Customer percent of total revenues	10.00%	20.00%

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Income Taxes (Tables)

3 Months Ended

Apr. 30, 2013

Income Tax Disclosure [Abstract]

Provision for Income Taxes

The provision for income taxes was comprised of the following:

Three months ended April 30,	2013			2012
Income tax expense	$	568		$	781
Effective tax rate	381		%	3		%

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Segment Reporting Operating Segment (Details)	3 Months Ended
	Apr. 30, 2013
Segment Reporting [Abstract]
Number of Operating Segments	1

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Employee Stock and Savings Plans - Stock Compensation Expense Recognized (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation	$ 6,566	$ 5,147
Cost of goods sold
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation	460	319
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation	2,610	2,117
Marketing and selling
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation	1,882	1,549
General and administration
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation	$ 1,614	$ 1,162
Omnibus Incentive Plan [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Award requisite service period	4 years
Award expiry period from date of grant	10 years
Employee stock purchase plans
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Maximum number of shares that may be purchased by eligible participants (in shares)	6,000
Eligible employee stock purchase price	85.00%
Employee stock purchase plan offering term	6 months

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Notes Payable - Redemption Prices Expressed as a Percentage of Principal, Plus any Accrued and Unpaid Interest (Detail) (4.00% Debentures due 2031, Convertible Subordinated Debt)	3 Months Ended
	Apr. 30, 2013
Redemption period beginning on April 5, 2016 and ending on March 31, 2017
Debt Instrument [Line Items]
Debentures redemption price	101.143%
Redemption period beginning on April 1, 2017 and ending on March 31, 2018
Debt Instrument [Line Items]
Debentures redemption price	100.571%
Redemption period On April 1, 2018 and thereafter
Debt Instrument [Line Items]
Debentures redemption price	100.00%

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Term Receivable and Trade Accounts Receivable Balances (Detail) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2013	Jan. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade accounts receivable, net	$ 367,389	$ 412,245
Term receivables, long-term	228,425	250,497
Trade accounts receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade accounts receivable, net	125,969	178,351
Term receivables, short-term
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade accounts receivable, net	$ 241,420	$ 233,894

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Condensed Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Net income (loss)	$ (419)	$ 27,530
Other comprehensive income (loss), net of tax:
Change in unrealized gain (loss) on derivative instruments	(255)	800
Cash flow hedge reclassification adjustment for net loss included in net income	(244)	347
Cash flow hedges change net of reclassifications	(11)	453
Change in accumulated translation adjustment	(5,317)	(781)
Change in pension liability	(2)	(3)
Comprehensive income (loss)	(5,749)	27,199
Net loss attributable to noncontrolling interest	(624)	(652)
Change in accumulated translation adjustment	43	(21)
Less: comprehensive loss attributable to the noncontrolling interest	(581)	(673)
Comprehensive income (loss) attributable to Mentor	$ (5,168)	$ 27,872

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Employee Stock and Savings Plans

3 Months Ended

Apr. 30, 2013

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

Employee Stock and Savings Plans

Stock-Based Compensation and Stockholders Equity

Stock Options Plans and Stock Plans

Our 2010 Omnibus Incentive Plan (Incentive Plan) is administered by the Compensation Committee of our Board of Directors and permits accelerated vesting of outstanding options, restricted stock units, restricted stock awards, and other equity incentives upon the occurrence of certain changes in control of our company. Stock options and restricted stock units under the Incentive Plan are generally expected to vest over four years. Stock options have an expiration date of ten years from the date of grant and an exercise price no less than the fair market value of the shares on the date of grant.

Employee Stock Purchase Plans

We have an employee stock purchase plan (ESPP) for U.S. employees and an ESPP for certain foreign subsidiary employees. The ESPPs provide for six-month offerings commencing on January 1 and July 1 of each year with purchases on June 30 and December 31 of each year. Each eligible employee may purchase up to six thousand shares of stock on each purchase date (subject to a plan limit on the total fair market value) at prices no less than 85% of the lesser of the fair market value of the shares on the offering date or on the purchase date.

Stock-Based Compensation Expense

The following table summarizes stock-based compensation expense recognized:

Three months ended April 30,	2013		2012
Cost of revenues	$	460	$	319
Operating expenses:
Research and development	2,610		2,117
Marketing and selling	1,882		1,549
General and administration	1,614		1,162
Equity plan-related compensation expense	$	6,566	$	5,147

Dividends

On March 7, 2013, the Board of Directors announced the adoption of a dividend policy under which we intend to pay an annual cash dividend of $0.18 per share of common stock. The initial quarterly dividend of $0.045 per share of outstanding common stock for a total of $5,064 was paid on April 10, 2013 to shareholders of record as of the close of business on March 22, 2013. On May 23, 2013, we announced a quarterly dividend of $0.045 per share on outstanding common stock, payable on July 1, 2013 to shareholders of record as of the close of business on June 10, 2013. Future declarations of quarterly dividends and the establishment of future record and payment dates are subject to the quarterly determination of our Board of Directors.

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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Apr. 30, 2013	Jan. 31, 2013
Allowance for doubtful accounts receivable, current	$ 4,752	$ 5,331
Property, plant, and equipment, accumulated depreciation	305,768	300,914
Intangible assets, accumulated amortization	$ 188,794	$ 186,060
Common stock, no par value	$ 0	$ 0
Common stock, shares authorized	300,000	300,000
Common stock, shares issued	112,599	112,902
Common Stock, shares outstanding	112,599	112,902

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Net Income Per Share - Computation of Basic and Diluted Net Income Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Disclosure Computation Of Basic And Diluted Net Loss Per Share [Abstract]
Net income attributable to Mentor Graphics shareholders	$ 205	$ 28,182
Non-controlling interest adjustment to redemption value	468	0
Net income (loss) attributable to parent, diluted	$ 673	$ 28,182
Weighted average common shares used to calculate basic net income per share (in shares)	112,711	109,907
Employee stock options, restricted stock units and employee stock purchase plan (in shares)	3,040	3,336
Weighted average common and potential common shares used to calculate diluted net income per share (in shares)	115,751	113,243
Basic net income per share attributable to Mentor Graphics shareholders (in dollars per share)	$ 0.01	$ 0.26
Diluted net income per share attributable to Mentor Graphics shareholders (in dollars per share)	$ 0.01	$ 0.25

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Condensed Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Revenues:
System and software	$ 123,284	$ 149,356
Service and support	103,231	98,562
Total revenues	226,515	247,918
Cost of revenues:
System and software	8,899	14,790
Service and support	30,075	28,414
Amortization of purchased technology	1,207	2,179
Total cost of revenues	40,181	45,383
Gross profit	186,334	202,535
Operating expenses:
Research and development	79,717	71,046
Marketing and selling	79,107	79,752
General and administration	18,277	16,649
Equity in earnings of Frontline	(397)	(587)
Amortization of intangible assets	1,654	1,706
Special charges	2,083	1,147
Total operating expenses	180,441	169,713
Operating income	5,893	32,822
Other income (expense), net	(959)	83
Interest expense	(4,785)	(4,594)
Income before income tax	149	28,311
Income tax expense	568	781
Net income (loss)	(419)	27,530
Net loss attributable to noncontrolling interest	(624)	(652)
Net income attributable to Mentor Graphics shareholders	$ 205	$ 28,182
Net income per share:
Basic (in dollars per share)	$ 0.01	$ 0.26
Diluted (in dollars per share)	$ 0.01	$ 0.25
Weighted average number of shares outstanding:
Basic (in shares)	112,711	109,907
Diluted (in shares)	115,751	113,243
Common Stock, Dividends, Per Share, Declared	$ 0.045	$ 0.000

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Notes Payable - Principal Amount, Unamortized Debt Discount, Net Carrying Amount of the Liability Component, and Carrying Amount of the Equity Component of the 4.00% Debentures (Detail) (4.00% Debentures due 2031, USD $) In Thousands, unless otherwise specified	Apr. 30, 2013	Jan. 31, 2013
4.00% Debentures due 2031
Debt Instrument [Line Items]
Principal amount	$ 253,000	$ 253,000
Unamortized debt discount	(33,063)	(34,454)
Net carrying amount of the liability component	219,937	218,546
Equity component	$ 43,930	$ 43,930

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Term Receivables and Trade Accounts Receivable (Tables)

3 Months Ended

Apr. 30, 2013

Term Receivables and Trade Accounts Receivable [Abstract]

Term receivable and trade accounts receivable balances

Term receivable and trade accounts receivable balances were as follows:

As of	April 30, 2013		January 31, 2013
Trade accounts receivable	$	125,969	$	178,351
Term receivables, short-term	$	241,420	$	233,894
Term receivables, long-term	$	228,425	$	250,497

Credit risk assessment for long-term receivables

The credit risk assessment for our long-term receivables was as follows:

As of	April 30, 2013		January 31, 2013
S&P credit rating:
AAA+ through BBB-	$	131,007	$	133,773
BB+ and lower	35,275		45,298
	166,282		179,071
Internal credit assessment	62,143		71,426
Total long-term term receivables	$	228,425	$	250,497

Change in allowance for doubtful accounts

The following shows the change in allowance for doubtful accounts:

Allowance for doubtful accounts	Beginning balance		Expense adjustment			Other deductions(1)			Ending balance
Three months ended April 30, 2013	$	5,331	$	(500	)	$	(79	)	$	4,752
Three months ended April 30, 2012	$	4,432	$	153		$	(48	)	$	4,537

(1)Specific account write-offs and foreign exchange.

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Segment Reporting

3 Months Ended

Apr. 30, 2013

Segment Reporting [Abstract]

Segment Reporting

Segment Reporting—Our Chief Operating Decision Makers (CODMs), which consist of the Chief Executive Officer and the President, review our consolidated results within one operating segment. In making operating decisions, our CODMs primarily consider consolidated financial information accompanied by disaggregated revenue information by geographic region.

We eliminate all intercompany revenues in computing revenues by geographic regions. Revenues related to operations in the geographic regions were:

Three months ended April 30,	2013		2012
Revenues:
North America	$	99,140	$	129,110
Europe	48,707		52,631
Japan	26,677		24,983
Pacific Rim	51,991		41,194
Total revenues	$	226,515	$	247,918

For the three months ended April 30, 2013, no single customer accounted for 10% or more of our total revenues. For the three months ended April 30, 2012, one customer accounted for 20% of our total revenues.

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Fair Value Measurement - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2013	Jan. 31, 2013
Disclosure Fair Value Measurement Additional Information [Abstract]
Fair value of contingent consideration included in accrued liabilities	$ 1,540	$ 1,197
Fair value of contingent consideration included in other long term liabilities	2,800	4,819
Current portion of notes payable	$ 0	$ 0

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Stock-Based Compensation and Stockholders equity Dividends (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	0 Months Ended	3 Months Ended
	May 24, 2013	Apr. 30, 2013	Apr. 30, 2012	Jul. 31, 2010
Equity [Abstract]
Dividends Payable, Date Declared	May 23, 2013	Mar. 07, 2013
Dividends Payable, Date to be Paid	Jul. 01, 2013	Apr. 10, 2013
Dividends Payable, Date of Record	Jun. 10, 2013	Mar. 22, 2013		Jul. 06, 2010
Common Stock Dividend Per Share Annual Amount		$ 0.18
Common Stock, Dividends, Per Share, Declared	$ 0.045	$ 0.045	$ 0.000
Payments of Dividends		$ 5,064	$ 0

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Related Party Transactions Related Party Transactions - Additional Information (Details) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2013
Related Party Transaction [Line Items]
Accounts receivable due from related party	$ 76,880

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Segment Reporting (Tables)

3 Months Ended

Apr. 30, 2013

Segment Reporting [Abstract]

Revenues Related to Operations in Geographic Regions

Revenues related to operations in the geographic regions were:

Three months ended April 30,	2013		2012
Revenues:
North America	$	99,140	$	129,110
Europe	48,707		52,631
Japan	26,677		24,983
Pacific Rim	51,991		41,194
Total revenues	$	226,515	$	247,918

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Other Income (Expense), Net (Tables)

3 Months Ended

Apr. 30, 2013

Other Income and Expenses [Abstract]

Other Income (Expense), Net

Other income (expense), net was comprised of the following:

Three months ended April 30,	2013			2012
Interest income	$	625		$	475
Foreign currency exchange loss	(1,375		)	(215		)
Other, net	(209		)	(177		)
Other income (expense), net	$	(959	)	$	83

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Related Party Transactions (Tables)

3 Months Ended

Apr. 30, 2013

Related Party Transactions [Abstract]

Revenue Recognized from Related Party

The following table shows revenue recognized from these customers:

Three months ended April 30,	2013			2012
Revenues from customers	$	28,536		$	9,002
Percentage of total revenues	12.6		%	3.6		%

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Commitments and Contingencies

3 Months Ended

Apr. 30, 2013

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Indemnifications

Our license and services agreements generally include a limited indemnification provision for claims from third parties relating to our intellectual property. The indemnification is generally limited to the amount paid by the customer, a multiple of the amount paid by the customer, or a set cap. As of April 30, 2013, we were not aware of any material liabilities arising from these indemnification obligations.

Legal Proceedings

From time to time we are involved in various disputes and litigation matters that arise in the ordinary course of business. These include disputes and lawsuits relating to intellectual property rights, contracts, distributorships, and employee relations matters. Periodically, we review the status of various disputes and litigation matters and assess our potential exposure. When we consider the potential loss from any dispute or legal matter probable and the amount or the range of loss can be estimated, we will accrue a liability for the estimated loss. Legal proceedings are subject to uncertainties, and the outcomes are difficult to predict. Because of such uncertainties, we base accruals on the best information available at the time. As additional information becomes available, we reassess the potential liability related to pending claims and litigation matters and may revise estimates. We believe that the outcome of current litigation, individually and in the aggregate, will not have a material effect on our results of operations.

In some instances, we are unable to reasonably estimate any potential loss or range of loss. The nature and progression of litigation can make it difficult to predict the impact a particular lawsuit will have. There are many reasons that we cannot make these assessments, including, among others, one or more of the following: the early stages of a proceeding; damages sought that are unspecific, unsupportable, unexplained or uncertain; discovery not having been started or incomplete; the complexity of the facts that are in dispute; the difficulty of assessing novel claims; the parties not having engaged in any meaningful settlement discussions; the possibility that other parties may share in any ultimate liability; and/or the often slow pace of litigation.

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Special Charges - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2013		Jan. 31, 2013
Disclosure Special Charges Additional Information [Abstract]
Percentage of termination benefit paid during the period	26.00%
Accrued special charges ending balance	$ 5,125	[1]	$ 4,917
Long-term portion of accrued lease termination fees and other facility costs, net of sublease income	2,110
Short-term portion of accrued special charges	$ 3,015

[1] Of the $5,125 total accrued special charges as of April 30, 2013, $2,110 represents the long-term portion, which primarily includes accrued lease termination fees and other facility costs, net of sublease income and other long-term costs. The remaining balance of $3,015 represents the short-term portion of accrued special charges.

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Notes Payable (Tables)

3 Months Ended

Apr. 30, 2013

Redemption prices

We may redeem some or all of the 4.00% Debentures for cash on or after April 5, 2016 at the following redemption prices expressed as a percentage of principal, plus any accrued and unpaid interest:

Period	Redemption Price
Beginning on April 5, 2016 and ending on March 31, 2017	101.143	%
Beginning on April 1, 2017 and ending on March 31, 2018	100.571	%
On April 1, 2018 and thereafter	100.000	%

4.00% Debentures due 2031

Principal amount, unamortized debt premium (discount), net carrying amount of the liability component, and carrying amount of the equity component

The principal amount, unamortized debt discount, net carrying amount of the liability component, and carrying amount of the equity component of the 4.00% Debentures are as follows:

As of	April 30, 2013			January 31, 2013
Principal amount	$	253,000		$	253,000
Unamortized debt discount	(33,063		)	(34,454		)
Net carrying amount of the liability component	$	219,937		$	218,546
Equity component	$	43,930		$	43,930

Recognized amounts in interest expense in the condensed consolidated statement of operations related to debentures

We recognized the following amounts in interest expense in the condensed consolidated statement of income related to the 4.00% Debentures:

Three months ended April 30,	2013		2012
Interest expense at the contractual interest rate	$	2,530	$	2,530
Amortization of debt discount	$	1,391	$	1,295

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Summary of Level 3 Activity (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 6,016
Payments	(1,131)
Adjustments	(603)
Interest accretion	58
Balance at ending of period	$ 4,340

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Net Income Per Share

3 Months Ended

Apr. 30, 2013

Earnings Per Share [Abstract]

Net Income Per Share

Net Income Per Share—We compute basic net income per share using the weighted average number of common shares outstanding during the period. We compute diluted net income per share using the weighted average number of common shares and potentially dilutive common shares outstanding during the period. Potentially dilutive common shares consist of common shares issuable upon vesting of restricted stock units, common shares issuable upon exercise of stock options, and purchase rights from ESPPs using the treasury stock method, and common shares issuable upon conversion of the convertible subordinated debentures, if dilutive.

The following provides the computation of basic and diluted net income per share:

Three months ended April 30,	2013		2012
Net income attributable to Mentor Graphics shareholders	$	205	$	28,182
Noncontrolling interest adjustment to redemption value	468		—
Adjusted net income attributable to Mentor Graphics shareholders	$	673	$	28,182
Weighted average common shares used to calculate basic net income per share	112,711		109,907
Employee stock options, restricted stock units, and employee stock purchase plan	3,040		3,336
Weighted average common and potential common shares used to calculate diluted net income per share	115,751		113,243
Net income per share attributable to Mentor Graphics shareholders:
Basic	$	0.01	$	0.26
Diluted	$	0.01	$	0.25

We excluded from the computation of diluted net income per share stock options and ESPP purchase rights to purchase 1,188 shares of common stock for the three months ended April 30, 2013 compared to 3,022 for the three months ended April 30, 2012. These stock options and ESPP purchase rights were determined to be anti-dilutive as a result of applying the treasury stock method.

We have increased the numerator of our basic and diluted earnings per share calculation by $468 for the three months ended April 30, 2013 for the adjustment to decrease the noncontrolling interest with redemption feature to its calculated redemption value at April 30, 2013, recorded directly to retained earnings. For the three months ended April 30, 2012, we excluded a similar adjustment from the calculation of basic and diluted earnings per share, as the amount was not significant.

We assume that the 4.00% Debentures will be settled in common stock for purposes of calculating the dilutive effect of the 4.00% Debentures. The effect of the assumed conversion of the 4.00% Debentures was anti-dilutive and therefore excluded from the computation of diluted net income per share.

The conversion features of the 4.00% Debentures, which allow for settlement in cash or a combination of cash and common stock, are further described in Note 6. “Notes Payable.”

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Notes Payable

3 Months Ended

Apr. 30, 2013

Notes Payable [Abstract]

Notes Payable

—In April 2011, we issued $253,000 of 4.00% Convertible Subordinated Debentures (4.00% Debentures) due 2031 in a private placement pursuant to the SEC Rule 144A under the Securities Act of 1933. Interest on the 4.00% Debentures is payable semi-annually in April and October.

The 4.00% Debentures are convertible, under certain circumstances, into our common stock at a conversion price of $20.538 per share for a total of 12,319 shares as of April 30, 2013. These circumstances include:

• The market price of our common stock exceeding 120% of the conversion price;

• A call for redemption of the 4.00% Debentures;

• Specified distributions to holders of our common stock;

• If a fundamental change, such as a change of control, occurs;

• During the two months prior to, but not on, the maturity date; or

• The market price of the 4.00% Debentures declining to less than 98% of the value of the common stock into which the 4.00% Debentures are convertible.

Upon conversion of any 4.00% Debentures, a holder will receive:

(i) Cash up to the principal amount of the 4.00% Debentures that are converted; and

(ii) Cash or shares of common stock, at our election, for the excess, if any, of the value of the converted shares over the principal amount.

If a holder elects to convert their 4.00% Debentures in connection with a fundamental change in the company that occurs prior to April 5, 2016, the holder will also be entitled to receive a make whole premium upon conversion in some circumstances.

We may redeem some or all of the 4.00% Debentures for cash on or after April 5, 2016 at the following redemption prices expressed as a percentage of principal, plus any accrued and unpaid interest:

Period	Redemption Price
Beginning on April 5, 2016 and ending on March 31, 2017	101.143	%
Beginning on April 1, 2017 and ending on March 31, 2018	100.571	%
On April 1, 2018 and thereafter	100.000	%

The holders, at their option, may redeem the 4.00% Debentures in whole or in part for cash on April 1, 2018, April 1, 2021, and April 1, 2026, and in the event of a fundamental change in the company. In each case, our repurchase price will be 100% of the principal amount of the 4.00% Debentures plus any accrued and unpaid interest.

The 4.00% Debentures contain a conversion feature that the debt may be settled in cash upon conversion, therefore we separately account for the implied liability and equity components of the 4.00% Debentures. The principal amount, unamortized debt discount, net carrying amount of the liability component, and carrying amount of the equity component of the 4.00% Debentures are as follows:

As of	April 30, 2013			January 31, 2013
Principal amount	$	253,000		$	253,000
Unamortized debt discount	(33,063		)	(34,454		)
Net carrying amount of the liability component	$	219,937		$	218,546
Equity component	$	43,930		$	43,930

The unamortized debt discount is amortizing to interest expense using the effective interest method through March 2018.

We recognized the following amounts in interest expense in the condensed consolidated statement of income related to the 4.00% Debentures:

Three months ended April 30,	2013		2012
Interest expense at the contractual interest rate	$	2,530	$	2,530
Amortization of debt discount	$	1,391	$	1,295

The effective interest rate on the 4.00% Debentures was 7.25% for the three months ended April 30, 2013 and 2012.

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General

3 Months Ended

Apr. 30, 2013

Organization, Consolidation and Presentation of Financial Statements [Abstract]

General

General—The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with United States (U.S.) generally accepted accounting principles (GAAP) and reflect all material normal recurring adjustments. However, certain information and footnote disclosures normally included in consolidated financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). In the opinion of management, the condensed consolidated financial statements include adjustments necessary for a fair presentation of the results of the interim periods presented. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and the notes included in our Annual Report on Form 10-K for the fiscal year ended January 31, 2013.

The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, and contingencies as of the date of the financial statements, and the reported amounts of revenues and expenses during the reporting periods. Actual results could differ from these estimates. Any changes in estimates will be reflected in the financial statements in future periods.

The condensed consolidated financial statements include our financial statements and those of our wholly-owned and majority-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.

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Notes Payable - Recognized Amounts in Interest Expense in the Condensed Consolidated Statement of Operations Related to the 4.00% Debentures (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Debt Instrument [Line Items]
Interest expense at the contractual interest rate	$ 4,785	$ 4,594
4.00% Debentures due 2031
Debt Instrument [Line Items]
Interest expense at the contractual interest rate	2,530	2,530
Amortization of debt discount	$ 1,391	$ 1,295

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Change in Allowance for Doubtful Accounts (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2013		Apr. 30, 2012
Allowance for Doubtful Accounts Receivable [Roll Forward]
Beginning balance	$ 5,331		$ 4,432
Charged to expense	(500)		153
Deductions	(79)	[1]	(48)	[1]
Ending balance	$ 4,752		$ 4,537

[1] Specific account write-offs and foreign exchange.

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Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Tables)

3 Months Ended

Apr. 30, 2013

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of components of accumulated other comprehensive income

The following table summarizes the components of accumulated other comprehensive income:

As of	April 30, 2013			January 31, 2013
Foreign currency translation adjustment	$	19,786		$	25,146
Unrealized loss on derivatives	(23		)	(12		)
Pension liability	263			265
Total accumulated other comprehensive income	$	20,026		$	25,399

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Provision for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Disclosure Provision For Income Taxes Abstract
Income tax expense	$ 568	$ 781
Effective tax rate	381.00%	3.00%

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Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2013	Jan. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustment	$ 19,786	$ 25,146
Unrealized loss on derivatives	(23)	(12)
Pension liability	263	265
Accumulated other comprehensive income	$ 20,026	$ 25,399

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Other Income (Expense), Net

3 Months Ended

Apr. 30, 2013

Other Income and Expenses [Abstract]

Other Income (Expense), Net

Other Income (Expense), Net—Other income (expense), net was comprised of the following:

Three months ended April 30,	2013			2012
Interest income	$	625		$	475
Foreign currency exchange loss	(1,375		)	(215		)
Other, net	(209		)	(177		)
Other income (expense), net	$	(959	)	$	83

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Incentive Stock Rights

3 Months Ended

Apr. 30, 2013

Incentive Stock Rights [Abstract]

Incentive Stock Rights

Incentive Stock Rights—Our Board of Directors has the authority to issue incentive stock in one or more series and to determine the relative rights and preferences of the incentive stock. On June 24, 2010, we adopted an Incentive Stock Purchase Rights Plan and declared a dividend distribution of one right for each outstanding share of common stock, payable to holders of record on July 6, 2010. On December 23, 2011, our Board of Directors amended the Stock Purchase Rights Plan to, among other things, extend the expiration date of the rights and increase the exercise price of each right. As long as the rights are attached to our common stock, we will issue one right with each new share of common stock so that all such shares will have attached rights. Under certain conditions, each right may be exercised to purchase 1/10,000 of a share of Series B Junior Participating Incentive Stock at a purchase price of sixty-five dollars, subject to adjustment. The rights are not presently exercisable and will only become exercisable if a person or group acquires or commences a tender offer to acquire 15% or more of our common stock.

If a person or group acquires 15% or more of our common stock, each right will be adjusted to entitle its holder to receive, upon exercise, common stock (or, in certain circumstances, other assets of ours) having a value equal to two times the exercise price of the right, or each right will be adjusted to entitle its holder to receive, upon exercise, common stock of the acquiring company having a value equal to two times the exercise price of the right, depending on the circumstances. The rights expire on June 30, 2013 and may be redeemed by us for $0.001 per right. The rights do not have voting or dividend rights and have no dilutive effect on our earnings.

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Information Concerning Supplemental Disclosures of Cash Flow Activities (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Cash paid, net for:
Interest	$ 5,551	$ 5,400
Income taxes	$ 4,055	$ 2,723

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Supplemental Cash Flow Information

3 Months Ended

Apr. 30, 2013

Supplemental Cash Flow Information [Abstract]

Supplemental Cash Flow Information

Supplemental Cash Flow Information—The following provides information concerning supplemental disclosures of cash flow activities:

Three months ended April 30,	2013		2012
Cash paid, net for:
Interest	$	5,551	$	5,400
Income taxes	$	4,055	$	2,723

We have an investment in Frontline PCB Solutions Limited Partnership (Frontline). We received returns on investment from Frontline of $1,500 during the three months ended April 30, 2013 and $950 during the three months ended April 30, 2012, which is included in net cash provided by operating activities in our condensed consolidated statement of cash flows.

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Related Party Transactions

3 Months Ended

Apr. 30, 2013

Related Party Transactions [Abstract]

Related Party Transactions

Related Party Transactions—Certain members of our Board of Directors also serve on the board of directors for some of our customers. Management believes the transactions between these customers and us were carried out on an arm’s-length basis. As of April 30, 2013, we had amounts receivable from these customers of $76,880. As of January 31, 2013, amounts receivable from these customers were not significant. The following table shows revenue recognized from these customers:

Three months ended April 30,	2013			2012
Revenues from customers	$	28,536		$	9,002
Percentage of total revenues	12.6		%	3.6		%

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Document and Entity Information	3 Months Ended
	Apr. 30, 2013	Jun. 03, 2013
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Apr. 30, 2013
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q1
Trading Symbol	MENT
Entity Registrant Name	MENTOR GRAPHICS CORP
Entity Central Index Key	0000701811
Current Fiscal Year End Date	--01-31
Entity Filer Category	Large Accelerated Filer
Common Stock, Shares, Outstanding		112,862,762

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Income Taxes

3 Months Ended

Apr. 30, 2013

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes—The provision for income taxes was comprised of the following:

Three months ended April 30,	2013			2012
Income tax expense	$	568		$	781
Effective tax rate	381		%	3		%

Generally, the provision for income taxes is the result of the mix of profits and losses earned in various tax jurisdictions with a broad range of income tax rates, withholding taxes, changes in tax reserves, and the application of valuation allowances on deferred tax assets. Accounting guidance requires for interim reporting that we evaluate our provision for income tax expense (benefit) based on our projected results of operations for the full year, and record adjustments in each quarter. Such adjustments consider period specific items and a separate determination of tax expense for entities in our consolidated group that are projected to have losses for which no tax benefit will be recognized.

Our effective tax rate is 381% for the three months ended April 30, 2013, after the inclusion of $360 in net unfavorable period specific items. The period specific items primarily relate to additions to and additional interest on liabilities for uncertain tax positions. For our full year forecast, we have projected a 13% effective tax rate. This rate is inclusive of period specific items recognized through April 30, 2013. Our projected rate for the full year differs from tax computed at the U.S. federal statutory rate of 35% primarily due to:

•The benefit of lower tax rates on earnings of foreign subsidiaries;

•Forecasted utilization of net operating loss carryforwards for which no previous benefit was recognized; and

•The application of tax incentives for research and development.

These differences are partially offset by:

•Additions to reserves for uncertain tax positions;

• Repatriation of foreign subsidiary earnings to the U.S.;

•Non-deductible equity compensation expense; and

•Withholding taxes.

Actual results may differ significantly from our current projections. Further, our effective tax rate could fluctuate considerably on a quarterly basis, and could be significantly affected to the extent our actual mix of earnings among individual jurisdictions is different than our expectations.

We determine deferred tax assets and liabilities based on differences between the financial reporting and tax basis of assets and liabilities. In addition, we record deferred tax assets for net operating loss carryforwards and tax credit carryforwards. We calculate the deferred tax assets and liabilities using the enacted tax rates and laws that will be in effect when we expect the differences to reverse. A valuation allowance is recorded when it is more likely than not that all or some portion of the

deferred tax asset will not be realized. Since 2004, we have determined it is uncertain whether our U.S. entity will generate sufficient taxable income and foreign source income to fully utilize net operating loss carryforwards, research and experimentation credit carryforwards, and foreign tax credit carryforwards before expiration. Accordingly, we recorded a valuation allowance against those deferred tax assets for which realization does not meet the more likely than not standard. We have established valuation allowances related to certain foreign deferred tax assets based on historical losses as well as future expectations in certain jurisdictions. We will continue to evaluate the realizability of the deferred tax assets on a periodic basis.

As of April 30, 2013, we had a liability of $28,305 for income taxes associated with uncertain income tax positions. Of this liability, $5,535 was classified as short-term liabilities in our condensed consolidated balance sheet as we generally anticipate the settlement of such liabilities will require payment of cash within the next twelve months. The remaining $22,770 of income tax associated with uncertain tax positions was classified as long-term liabilities. Certain liabilities may result in the reduction of deferred tax assets rather than settlement in cash. We are not able to reasonably estimate the timing of any cash payments required to settle the long-term liabilities and do not believe that the ultimate settlement of these liabilities will materially affect our liquidity.

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Changes in Accrued Special Charges (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2013		Apr. 30, 2012
Restructuring Cost and Reserve [Line Items]
Employee severance and related costs	$ 2,079		$ 988
Other costs	4		159
Restructuring Reserve [Roll Forward]
Accrued special charges beginning balance	4,917
Special charges	2,083		1,147
Payments	(1,875)
Accrued special charges ending balance	5,125	[1]
Employee severance and related costs
Restructuring Cost and Reserve [Line Items]
Employee severance and related costs	2,079
Restructuring Reserve [Roll Forward]
Accrued special charges beginning balance	2,028
Payments	(2,119)
Accrued special charges ending balance	1,988	[1]
Other costs
Restructuring Cost and Reserve [Line Items]
Other costs	4
Restructuring Reserve [Roll Forward]
Accrued special charges beginning balance	2,889
Payments	244
Accrued special charges ending balance	$ 3,137	[1]

[1] Of the $5,125 total accrued special charges as of April 30, 2013, $2,110 represents the long-term portion, which primarily includes accrued lease termination fees and other facility costs, net of sublease income and other long-term costs. The remaining balance of $3,015 represents the short-term portion of accrued special charges.

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Summary of the Components of the Special Charges (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Disclosure Summary Of Components Of Special Charges [Abstract]
Employee severance and related costs	$ 2,079	$ 988
Other costs	4	159
Special charges	$ 2,083	$ 1,147