401k Plan data: WESTERN DIGITAL CORPORATION 401(K) PLAN plan

WESTERN DIGITAL CORPORATION 401(K) PLAN 401k Plan overview

Plan Name	WESTERN DIGITAL CORPORATION 401(K) PLAN
Plan identification number	003

WESTERN DIGITAL CORPORATION 401(K) PLAN Benefits

401k Plan Type

Defined Contribution Pension

Plan Features/Benefits

Profit-sharing
ERISA section 404(c) Plan - This plan, or any part of it is intended to meet the conditions of 29 CFR 2550.404c-1.
Total participant-directed account plan - Participants have the opportunity to direct the investment of all the assets allocated to their individual accounts, regardless of whether 29 CFR 2550.404c-1 is intended to be met.
Code section 401(k) feature - A cash or deferred arrangement described in Code section 401(k) that is part of a qualified defined contribution plan that provides for an election by employees to defer part of their compensation or receive these amounts in cash.
Code section 401(m) arrangement - Employee contributions are allocated to separate accounts under the plan or employer contributions are based, in whole or in part, on employee deferrals or contribtions to the plan. Not applicable if plan is 401(k) plan with only QNECs and/or QMACs. Also not applicable if Code section 403(b)(1), 403(b)(7) or 408 arrangements/accounts/annuities.
Participant-directed brokerage accounts provided as an investment option under the plan.
Plan provides for automatic enrollment in plan that has employee contributions deducted from payroll.
Total or partial participant-directed account plan - plan uses default investment account for participants who fail to direct assets in their account.

401k Sponsoring company profile

WESTERN DIGITAL CORPORATION has sponsored the creation of one or more 401k plans.

Company Name: WESTERN DIGITAL CORPORATION

Employer identification number (EIN): 952647125

NAIC Classification: 334110

Additional information about WESTERN DIGITAL CORPORATION

Jurisdiction of Incorporation: State of Delaware Division of Corporations

Incorporation Date:

Company Identification Number: 3308006

More information about WESTERN DIGITAL CORPORATION

Form 5500 Filing Information

Submission information for form 5500 for 401k plan WESTERN DIGITAL CORPORATION 401(K) PLAN

Plan id# Filing Submission Date Name of Administrator Date Administrator Signed Name of Company Sponsor Date Sponsor Signed
003 2013-01-01 STEVEN M. SLAVIN, VP OF TAX
003 2012-01-01 STEVEN SLAVIN
003 2011-01-01 STEVEN M. SLAVIN, VP, TAX
003 2010-01-01 STEVEN M. SLAVIN, VP, TAX STEVEN M. SLAVIN, VP, TAX 2011-10-14
003 2009-07-01 STEVEN M. SLAVIN, VP, TAX STEVEN M. SLAVIN, VP, TAX 2010-10-11

Plan id#	Filing Submission Date	Name of Administrator	Name of Company Sponsor	Date Sponsor Signed
003	2013-01-01	STEVEN M. SLAVIN, VP OF TAX
003	2012-01-01	STEVEN SLAVIN
003	2011-01-01	STEVEN M. SLAVIN, VP, TAX
003	2010-01-01	STEVEN M. SLAVIN, VP, TAX	STEVEN M. SLAVIN, VP, TAX	2011-10-14
003	2009-07-01	STEVEN M. SLAVIN, VP, TAX	STEVEN M. SLAVIN, VP, TAX	2010-10-11

Plan Statistics for WESTERN DIGITAL CORPORATION 401(K) PLAN

401k plan membership statisitcs for WESTERN DIGITAL CORPORATION 401(K) PLAN

Measure Date Value
2013: WESTERN DIGITAL CORPORATION 401(K) PLAN 2013 401k membership
Total participants, beginning-of-year 2013-01-01 7,791
Total number of active participants reported on line 7a of the Form 5500 2013-01-01 7,007
Number of retired or separated participants receiving benefits 2013-01-01 1
Number of other retired or separated participants entitled to future benefits 2013-01-01 1,544
Total of all active and inactive participants 2013-01-01 8,552
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2013-01-01 5
Total participants 2013-01-01 8,557
Number of participants with account balances 2013-01-01 8,340
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2013-01-01 267
2012: WESTERN DIGITAL CORPORATION 401(K) PLAN 2012 401k membership
Total participants, beginning-of-year 2012-01-01 5,327
Total number of active participants reported on line 7a of the Form 5500 2012-01-01 6,498
Number of retired or separated participants receiving benefits 2012-01-01 0
Number of other retired or separated participants entitled to future benefits 2012-01-01 1,286
Total of all active and inactive participants 2012-01-01 7,784
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2012-01-01 7
Total participants 2012-01-01 7,791
Number of participants with account balances 2012-01-01 7,592
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2012-01-01 236
2011: WESTERN DIGITAL CORPORATION 401(K) PLAN 2011 401k membership
Total participants, beginning-of-year 2011-01-01 5,148
Total number of active participants reported on line 7a of the Form 5500 2011-01-01 4,166
Number of other retired or separated participants entitled to future benefits 2011-01-01 1,153
Total of all active and inactive participants 2011-01-01 5,319
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2011-01-01 8
Total participants 2011-01-01 5,327
Number of participants with account balances 2011-01-01 5,194
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2011-01-01 162
2010: WESTERN DIGITAL CORPORATION 401(K) PLAN 2010 401k membership
Total participants, beginning-of-year 2010-01-01 4,912
Total number of active participants reported on line 7a of the Form 5500 2010-01-01 4,015
Number of retired or separated participants receiving benefits 2010-01-01 0
Number of other retired or separated participants entitled to future benefits 2010-01-01 1,127
Total of all active and inactive participants 2010-01-01 5,142
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2010-01-01 6
Total participants 2010-01-01 5,148
Number of participants with account balances 2010-01-01 5,006
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2010-01-01 100
2009: WESTERN DIGITAL CORPORATION 401(K) PLAN 2009 401k membership
Total participants, beginning-of-year 2009-07-01 4,625
Total number of active participants reported on line 7a of the Form 5500 2009-07-01 3,651
Number of retired or separated participants receiving benefits 2009-07-01 0
Number of other retired or separated participants entitled to future benefits 2009-07-01 1,253
Total of all active and inactive participants 2009-07-01 4,904
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2009-07-01 8
Total participants 2009-07-01 4,912
Number of participants with account balances 2009-07-01 4,740
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2009-07-01 40

Measure	Date	Value
2013: WESTERN DIGITAL CORPORATION 401(K) PLAN 2013 401k membership
Total participants, beginning-of-year	2013-01-01	7,791
Total number of active participants reported on line 7a of the Form 5500	2013-01-01	7,007
Number of retired or separated participants receiving benefits	2013-01-01	1
Number of other retired or separated participants entitled to future benefits	2013-01-01	1,544
Total of all active and inactive participants	2013-01-01	8,552
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2013-01-01	5
Total participants	2013-01-01	8,557
Number of participants with account balances	2013-01-01	8,340
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2013-01-01	267
2012: WESTERN DIGITAL CORPORATION 401(K) PLAN 2012 401k membership
Total participants, beginning-of-year	2012-01-01	5,327
Total number of active participants reported on line 7a of the Form 5500	2012-01-01	6,498
Number of retired or separated participants receiving benefits	2012-01-01	0
Number of other retired or separated participants entitled to future benefits	2012-01-01	1,286
Total of all active and inactive participants	2012-01-01	7,784
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2012-01-01	7
Total participants	2012-01-01	7,791
Number of participants with account balances	2012-01-01	7,592
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2012-01-01	236
2011: WESTERN DIGITAL CORPORATION 401(K) PLAN 2011 401k membership
Total participants, beginning-of-year	2011-01-01	5,148
Total number of active participants reported on line 7a of the Form 5500	2011-01-01	4,166
Number of other retired or separated participants entitled to future benefits	2011-01-01	1,153
Total of all active and inactive participants	2011-01-01	5,319
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2011-01-01	8
Total participants	2011-01-01	5,327
Number of participants with account balances	2011-01-01	5,194
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2011-01-01	162
2010: WESTERN DIGITAL CORPORATION 401(K) PLAN 2010 401k membership
Total participants, beginning-of-year	2010-01-01	4,912
Total number of active participants reported on line 7a of the Form 5500	2010-01-01	4,015
Number of retired or separated participants receiving benefits	2010-01-01	0
Number of other retired or separated participants entitled to future benefits	2010-01-01	1,127
Total of all active and inactive participants	2010-01-01	5,142
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2010-01-01	6
Total participants	2010-01-01	5,148
Number of participants with account balances	2010-01-01	5,006
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2010-01-01	100
2009: WESTERN DIGITAL CORPORATION 401(K) PLAN 2009 401k membership
Total participants, beginning-of-year	2009-07-01	4,625
Total number of active participants reported on line 7a of the Form 5500	2009-07-01	3,651
Number of retired or separated participants receiving benefits	2009-07-01	0
Number of other retired or separated participants entitled to future benefits	2009-07-01	1,253
Total of all active and inactive participants	2009-07-01	4,904
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2009-07-01	8
Total participants	2009-07-01	4,912
Number of participants with account balances	2009-07-01	4,740
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2009-07-01	40

Financial Data on WESTERN DIGITAL CORPORATION 401(K) PLAN

Measure	Date	Value
2013 : WESTERN DIGITAL CORPORATION 401(K) PLAN 2013 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2013-12-31	$30,101,333
Total unrealized appreciation/depreciation of assets	2013-12-31	$30,101,333
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2013-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2013-12-31	$0
Total income from all sources (including contributions)	2013-12-31	$268,556,651
Total loss/gain on sale of assets	2013-12-31	$4,077,923
Total of all expenses incurred	2013-12-31	$46,047,992
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2013-12-31	$45,806,177
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2013-12-31	$114,957,271
Value of total assets at end of year	2013-12-31	$830,455,380
Value of total assets at beginning of year	2013-12-31	$607,946,721
Total of administrative expenses incurred including professional, contract, advisory and management fees	2013-12-31	$241,815
Total interest from all sources	2013-12-31	$448,143
Total dividends received (eg from common stock, registered investment company shares)	2013-12-31	$19,317,327
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2013-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2013-12-31	$18,695,623
Administrative expenses professional fees incurred	2013-12-31	$55,484
Was this plan covered by a fidelity bond	2013-12-31	Yes
Value of fidelity bond cover	2013-12-31	$5,000,000
If this is an individual account plan, was there a blackout period	2013-12-31	Yes
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2013-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2013-12-31	No
Contributions received from participants	2013-12-31	$72,144,429
Participant contributions at end of year	2013-12-31	$11,324,100
Participant contributions at beginning of year	2013-12-31	$10,585,793
Assets. Other investments not covered elsewhere at end of year	2013-12-31	$1,422,434
Assets. Other investments not covered elsewhere at beginning of year	2013-12-31	$917,869
Income. Received or receivable in cash from other sources (including rollovers)	2013-12-31	$23,646,825
Other income not declared elsewhere	2013-12-31	$533,055
Administrative expenses (other) incurred	2013-12-31	$34,379
Total non interest bearing cash at end of year	2013-12-31	$16,799
Total non interest bearing cash at beginning of year	2013-12-31	$65,547
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2013-12-31	No
Value of net income/loss	2013-12-31	$222,508,659
Value of net assets at end of year (total assets less liabilities)	2013-12-31	$830,455,380
Value of net assets at beginning of year (total assets less liabilities)	2013-12-31	$607,946,721
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2013-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2013-12-31	No
Were any leases to which the plan was party in default or uncollectible	2013-12-31	No
Investment advisory and management fees	2013-12-31	$151,952
Value of interest in registered invesment companies (eg mutual funds) at end of year	2013-12-31	$575,066,459
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2013-12-31	$406,389,242
Interest on participant loans	2013-12-31	$448,143
Value of interest in common/collective trusts at end of year	2013-12-31	$176,540,086
Value of interest in common/collective trusts at beginning of year	2013-12-31	$149,176,629
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2013-12-31	$85,089,351
Net investment gain or loss from common/collective trusts	2013-12-31	$14,032,248
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2013-12-31	No
Was there a failure to transmit to the plan any participant contributions	2013-12-31	Yes
Has the plan failed to provide any benefit when due under the plan	2013-12-31	No
Assets. Invements in employer securities at end of year	2013-12-31	$64,341,866
Assets. Invements in employer securities at beginning of year	2013-12-31	$40,160,624
Contributions received in cash from employer	2013-12-31	$19,166,017
Employer contributions (assets) at end of year	2013-12-31	$1,743,636
Employer contributions (assets) at beginning of year	2013-12-31	$651,017
Income. Dividends from common stock	2013-12-31	$621,704
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2013-12-31	$45,806,177
Was the provided the required notice or one of the exceptions to providing the black out period notice applied under 29 CFR 2520.101-3	2013-12-31	Yes
Did the plan have assets held for investment	2013-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2013-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2013-12-31	No
Aggregate proceeds on sale of assets	2013-12-31	$16,102,355
Aggregate carrying amount (costs) on sale of assets	2013-12-31	$12,024,432
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2013-12-31	No
Opinion of an independent qualified public accountant for this plan	2013-12-31	Unqualified
Accountancy firm name	2013-12-31	BDO USA, LLP
Accountancy firm EIN	2013-12-31	135381590
2012 : WESTERN DIGITAL CORPORATION 401(K) PLAN 2012 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2012-12-31	$9,745,252
Total unrealized appreciation/depreciation of assets	2012-12-31	$9,745,252
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2012-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2012-12-31	$0
Total income from all sources (including contributions)	2012-12-31	$196,727,342
Total loss/gain on sale of assets	2012-12-31	$2,141,396
Total of all expenses incurred	2012-12-31	$17,880,215
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2012-12-31	$17,743,247
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2012-12-31	$129,506,088
Value of total assets at end of year	2012-12-31	$607,946,721
Value of total assets at beginning of year	2012-12-31	$429,099,594
Total of administrative expenses incurred including professional, contract, advisory and management fees	2012-12-31	$136,968
Total interest from all sources	2012-12-31	$400,137
Total dividends received (eg from common stock, registered investment company shares)	2012-12-31	$12,313,519
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2012-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2012-12-31	$11,841,155
Administrative expenses professional fees incurred	2012-12-31	$600
Was this plan covered by a fidelity bond	2012-12-31	Yes
Value of fidelity bond cover	2012-12-31	$5,000,000
If this is an individual account plan, was there a blackout period	2012-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2012-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2012-12-31	No
Contributions received from participants	2012-12-31	$58,586,469
Participant contributions at end of year	2012-12-31	$10,585,793
Participant contributions at beginning of year	2012-12-31	$7,456,771
Assets. Other investments not covered elsewhere at end of year	2012-12-31	$917,869
Assets. Other investments not covered elsewhere at beginning of year	2012-12-31	$791,719
Income. Received or receivable in cash from other sources (including rollovers)	2012-12-31	$55,250,981
Other income not declared elsewhere	2012-12-31	$-32,551
Administrative expenses (other) incurred	2012-12-31	$28,407
Total non interest bearing cash at end of year	2012-12-31	$65,547
Total non interest bearing cash at beginning of year	2012-12-31	$0
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2012-12-31	No
Value of net income/loss	2012-12-31	$178,847,127
Value of net assets at end of year (total assets less liabilities)	2012-12-31	$607,946,721
Value of net assets at beginning of year (total assets less liabilities)	2012-12-31	$429,099,594
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2012-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2012-12-31	No
Were any leases to which the plan was party in default or uncollectible	2012-12-31	No
Investment advisory and management fees	2012-12-31	$107,961
Value of interest in registered invesment companies (eg mutual funds) at end of year	2012-12-31	$406,389,242
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2012-12-31	$270,644,119
Interest on participant loans	2012-12-31	$400,137
Value of interest in common/collective trusts at end of year	2012-12-31	$149,176,629
Value of interest in common/collective trusts at beginning of year	2012-12-31	$120,411,968
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2012-12-31	$33,286,598
Net investment gain or loss from common/collective trusts	2012-12-31	$9,366,903
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2012-12-31	No
Was there a failure to transmit to the plan any participant contributions	2012-12-31	No
Has the plan failed to provide any benefit when due under the plan	2012-12-31	No
Assets. Invements in employer securities at end of year	2012-12-31	$40,160,624
Assets. Invements in employer securities at beginning of year	2012-12-31	$29,449,491
Contributions received in cash from employer	2012-12-31	$15,668,638
Employer contributions (assets) at end of year	2012-12-31	$651,017
Employer contributions (assets) at beginning of year	2012-12-31	$345,526
Income. Dividends from common stock	2012-12-31	$472,364
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2012-12-31	$17,743,247
Did the plan have assets held for investment	2012-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2012-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2012-12-31	No
Aggregate proceeds on sale of assets	2012-12-31	$10,506,738
Aggregate carrying amount (costs) on sale of assets	2012-12-31	$8,365,342
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2012-12-31	No
Opinion of an independent qualified public accountant for this plan	2012-12-31	Unqualified
Accountancy firm name	2012-12-31	BDO USA, LLP
Accountancy firm EIN	2012-12-31	135381590
2011 : WESTERN DIGITAL CORPORATION 401(K) PLAN 2011 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2011-12-31	$-2,419,526
Total unrealized appreciation/depreciation of assets	2011-12-31	$-2,419,526
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2011-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2011-12-31	$0
Total income from all sources (including contributions)	2011-12-31	$45,103,410
Total loss/gain on sale of assets	2011-12-31	$-298,529
Total of all expenses incurred	2011-12-31	$18,300,642
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2011-12-31	$18,116,100
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2011-12-31	$49,997,482
Value of total assets at end of year	2011-12-31	$429,099,594
Value of total assets at beginning of year	2011-12-31	$402,296,826
Total of administrative expenses incurred including professional, contract, advisory and management fees	2011-12-31	$184,542
Total interest from all sources	2011-12-31	$314,942
Total dividends received (eg from common stock, registered investment company shares)	2011-12-31	$7,914,287
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2011-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2011-12-31	$7,914,287
Administrative expenses professional fees incurred	2011-12-31	$29,000
Was this plan covered by a fidelity bond	2011-12-31	Yes
Value of fidelity bond cover	2011-12-31	$5,000,000
If this is an individual account plan, was there a blackout period	2011-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2011-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2011-12-31	No
Contributions received from participants	2011-12-31	$37,402,528
Participant contributions at end of year	2011-12-31	$7,456,771
Participant contributions at beginning of year	2011-12-31	$6,403,157
Assets. Other investments not covered elsewhere at end of year	2011-12-31	$791,719
Assets. Other investments not covered elsewhere at beginning of year	2011-12-31	$1,031,532
Income. Received or receivable in cash from other sources (including rollovers)	2011-12-31	$2,498,440
Other income not declared elsewhere	2011-12-31	$-127,229
Administrative expenses (other) incurred	2011-12-31	$16,250
Total non interest bearing cash at end of year	2011-12-31	$0
Total non interest bearing cash at beginning of year	2011-12-31	$3,813
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2011-12-31	No
Value of net income/loss	2011-12-31	$26,802,768
Value of net assets at end of year (total assets less liabilities)	2011-12-31	$429,099,594
Value of net assets at beginning of year (total assets less liabilities)	2011-12-31	$402,296,826
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2011-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2011-12-31	No
Were any leases to which the plan was party in default or uncollectible	2011-12-31	No
Investment advisory and management fees	2011-12-31	$139,292
Value of interest in registered invesment companies (eg mutual funds) at end of year	2011-12-31	$270,644,119
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2011-12-31	$251,123,811
Interest on participant loans	2011-12-31	$314,942
Value of interest in common/collective trusts at end of year	2011-12-31	$120,411,968
Value of interest in common/collective trusts at beginning of year	2011-12-31	$110,248,416
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2011-12-31	$-13,734,647
Net investment gain or loss from common/collective trusts	2011-12-31	$3,456,630
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2011-12-31	No
Was there a failure to transmit to the plan any participant contributions	2011-12-31	No
Has the plan failed to provide any benefit when due under the plan	2011-12-31	No
Assets. Invements in employer securities at end of year	2011-12-31	$29,449,491
Assets. Invements in employer securities at beginning of year	2011-12-31	$33,486,097
Contributions received in cash from employer	2011-12-31	$10,096,514
Employer contributions (assets) at end of year	2011-12-31	$345,526
Employer contributions (assets) at beginning of year	2011-12-31	$0
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2011-12-31	$18,116,100
Did the plan have assets held for investment	2011-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2011-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2011-12-31	No
Aggregate proceeds on sale of assets	2011-12-31	$5,711,287
Aggregate carrying amount (costs) on sale of assets	2011-12-31	$6,009,816
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2011-12-31	No
Opinion of an independent qualified public accountant for this plan	2011-12-31	Unqualified
Accountancy firm name	2011-12-31	BDO USA, LLP
Accountancy firm EIN	2011-12-31	135381590
2010 : WESTERN DIGITAL CORPORATION 401(K) PLAN 2010 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2010-12-31	$-8,563,198
Total unrealized appreciation/depreciation of assets	2010-12-31	$-8,563,198
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2010-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2010-12-31	$0
Total income from all sources (including contributions)	2010-12-31	$80,230,809
Total loss/gain on sale of assets	2010-12-31	$-1,790,466
Total of all expenses incurred	2010-12-31	$18,007,799
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2010-12-31	$17,756,850
Value of total corrective distributions	2010-12-31	$46,255
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2010-12-31	$46,980,408
Value of total assets at end of year	2010-12-31	$402,296,826
Value of total assets at beginning of year	2010-12-31	$340,073,816
Total of administrative expenses incurred including professional, contract, advisory and management fees	2010-12-31	$204,694
Total interest from all sources	2010-12-31	$316,534
Total dividends received (eg from common stock, registered investment company shares)	2010-12-31	$6,718,828
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2010-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2010-12-31	$6,718,828
Was this plan covered by a fidelity bond	2010-12-31	Yes
Value of fidelity bond cover	2010-12-31	$5,000,000
If this is an individual account plan, was there a blackout period	2010-12-31	No
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2010-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2010-12-31	No
Contributions received from participants	2010-12-31	$34,209,066
Participant contributions at end of year	2010-12-31	$6,403,157
Participant contributions at beginning of year	2010-12-31	$6,054,455
Assets. Other investments not covered elsewhere at end of year	2010-12-31	$1,031,532
Assets. Other investments not covered elsewhere at beginning of year	2010-12-31	$836,884
Income. Received or receivable in cash from other sources (including rollovers)	2010-12-31	$3,243,503
Other income not declared elsewhere	2010-12-31	$114,454
Administrative expenses (other) incurred	2010-12-31	$204,694
Total non interest bearing cash at end of year	2010-12-31	$3,813
Total non interest bearing cash at beginning of year	2010-12-31	$46,186
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2010-12-31	No
Value of net income/loss	2010-12-31	$62,223,010
Value of net assets at end of year (total assets less liabilities)	2010-12-31	$402,296,826
Value of net assets at beginning of year (total assets less liabilities)	2010-12-31	$340,073,816
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2010-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2010-12-31	No
Were any leases to which the plan was party in default or uncollectible	2010-12-31	No
Value of interest in registered invesment companies (eg mutual funds) at end of year	2010-12-31	$251,123,811
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2010-12-31	$189,148,575
Interest on participant loans	2010-12-31	$316,534
Value of interest in common/collective trusts at end of year	2010-12-31	$110,248,416
Value of interest in common/collective trusts at beginning of year	2010-12-31	$96,964,424
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2010-12-31	$28,432,044
Net investment gain or loss from common/collective trusts	2010-12-31	$8,022,205
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2010-12-31	No
Was there a failure to transmit to the plan any participant contributions	2010-12-31	No
Has the plan failed to provide any benefit when due under the plan	2010-12-31	No
Assets. Invements in employer securities at end of year	2010-12-31	$33,486,097
Assets. Invements in employer securities at beginning of year	2010-12-31	$46,589,191
Contributions received in cash from employer	2010-12-31	$9,527,839
Employer contributions (assets) at end of year	2010-12-31	$0
Employer contributions (assets) at beginning of year	2010-12-31	$434,101
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2010-12-31	$17,756,850
Did the plan have assets held for investment	2010-12-31	Yes
Did the plan hold any assets whose current value was neither redily determinable on an established market nor set by an independent third party appraiser	2010-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2010-12-31	No
Aggregate proceeds on sale of assets	2010-12-31	$7,649,917
Aggregate carrying amount (costs) on sale of assets	2010-12-31	$9,440,383
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2010-12-31	No
Opinion of an independent qualified public accountant for this plan	2010-12-31	Unqualified
Accountancy firm name	2010-12-31	BDO USA, LLP
Accountancy firm EIN	2010-12-31	135381590
2009 : WESTERN DIGITAL CORPORATION 401(K) PLAN 2009 401k financial data
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2009-12-31	$0

Form 5500 Responses for WESTERN DIGITAL CORPORATION 401(K) PLAN

2013: WESTERN DIGITAL CORPORATION 401(K) PLAN 2013 form 5500 responses
2013-01-01	Type of plan entity	Single employer plan
2013-01-01	Submission has been amended	No
2013-01-01	This submission is the final filing	No
2013-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2013-01-01	Plan is a collectively bargained plan	No
2013-01-01	Plan funding arrangement – Trust	Yes
2013-01-01	Plan benefit arrangement - Trust	Yes
2012: WESTERN DIGITAL CORPORATION 401(K) PLAN 2012 form 5500 responses
2012-01-01	Type of plan entity	Single employer plan
2012-01-01	Submission has been amended	No
2012-01-01	This submission is the final filing	No
2012-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2012-01-01	Plan is a collectively bargained plan	No
2012-01-01	Plan funding arrangement – Trust	Yes
2012-01-01	Plan benefit arrangement - Trust	Yes
2011: WESTERN DIGITAL CORPORATION 401(K) PLAN 2011 form 5500 responses
2011-01-01	Type of plan entity	Single employer plan
2011-01-01	Submission has been amended	No
2011-01-01	This submission is the final filing	No
2011-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2011-01-01	Plan is a collectively bargained plan	No
2011-01-01	Plan funding arrangement – Trust	Yes
2011-01-01	Plan benefit arrangement - Trust	Yes
2010: WESTERN DIGITAL CORPORATION 401(K) PLAN 2010 form 5500 responses
2010-01-01	Type of plan entity	Single employer plan
2010-01-01	Submission has been amended	No
2010-01-01	This submission is the final filing	No
2010-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2010-01-01	Plan is a collectively bargained plan	No
2010-01-01	Plan funding arrangement – Trust	Yes
2010-01-01	Plan benefit arrangement - Trust	Yes
2009: WESTERN DIGITAL CORPORATION 401(K) PLAN 2009 form 5500 responses
2009-07-01	Type of plan entity	Single employer plan
2009-07-01	Submission has been amended	No
2009-07-01	This submission is the final filing	No
2009-07-01	This return/report is a short plan year return/report (less than 12 months)	Yes
2009-07-01	Plan is a collectively bargained plan	No
2009-07-01	Plan funding arrangement – Trust	Yes
2009-07-01	Plan benefit arrangement - Trust	Yes

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Company Name:	WESTERN DIGITAL CORPORATION
Employer identification number (EIN):	952647125
NAIC Classification:	334110

Jurisdiction of Incorporation:	State of Delaware Division of Corporations
Incorporation Date:
Company Identification Number:	3308006