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.
Master plan - A pension plan that is made available by a sponsor for adoption by employers; that is the subject of a favorable opinion letter; and for which a single funding medium (for example, a trust or custodial account) is established for the joint use of all adopting employers.
Plan sponsor(s) is (are) a member(s) of a controlled group (Code sections 414(b), (c), or (m)).

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): 330956711

NAIC Classification: 334610

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 2022-01-01
003 2021-01-01
003 2020-01-01
003 2019-01-01
003 2019-01-01
003 2018-01-01
003 2017-01-01 ROBERTA SWANSON
003 2016-01-01 ROBERTA SWANSON
003 2015-01-01 ROBERTA SWANSON
003 2014-01-01 STEVEN M. SLAVIN, VP OF TAX

Plan Statistics for WESTERN DIGITAL CORPORATION 401(K) PLAN

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

Measure Date Value
2022: WESTERN DIGITAL CORPORATION 401(K) PLAN 2022 401k membership
Total participants, beginning-of-year 2022-01-01 11,319
Total number of active participants reported on line 7a of the Form 5500 2022-01-01 7,690
Number of retired or separated participants receiving benefits 2022-01-01 299
Number of other retired or separated participants entitled to future benefits 2022-01-01 3,669
Total of all active and inactive participants 2022-01-01 11,658
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2022-01-01 39
Total participants 2022-01-01 11,697
Number of participants with account balances 2022-01-01 11,598
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2022-01-01 4
2021: WESTERN DIGITAL CORPORATION 401(K) PLAN 2021 401k membership
Total participants, beginning-of-year 2021-01-01 11,901
Total number of active participants reported on line 7a of the Form 5500 2021-01-01 7,874
Number of retired or separated participants receiving benefits 2021-01-01 36
Number of other retired or separated participants entitled to future benefits 2021-01-01 3,386
Total of all active and inactive participants 2021-01-01 11,296
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2021-01-01 23
Total participants 2021-01-01 11,319
Number of participants with account balances 2021-01-01 11,123
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2021-01-01 217
2020: WESTERN DIGITAL CORPORATION 401(K) PLAN 2020 401k membership
Total participants, beginning-of-year 2020-01-01 11,879
Total number of active participants reported on line 7a of the Form 5500 2020-01-01 7,985
Number of retired or separated participants receiving benefits 2020-01-01 38
Number of other retired or separated participants entitled to future benefits 2020-01-01 3,864
Total of all active and inactive participants 2020-01-01 11,887
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2020-01-01 23
Total participants 2020-01-01 11,910
Number of participants with account balances 2020-01-01 11,733
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2020-01-01 252
2019: WESTERN DIGITAL CORPORATION 401(K) PLAN 2019 401k membership
Total participants, beginning-of-year 2019-01-01 12,146
Total number of active participants reported on line 7a of the Form 5500 2019-01-01 7,934
Number of retired or separated participants receiving benefits 2019-01-01 25
Number of other retired or separated participants entitled to future benefits 2019-01-01 3,905
Total of all active and inactive participants 2019-01-01 11,864
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2019-01-01 25
Total participants 2019-01-01 11,889
Number of participants with account balances 2019-01-01 11,645
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2019-01-01 349
2018: WESTERN DIGITAL CORPORATION 401(K) PLAN 2018 401k membership
Total participants, beginning-of-year 2018-01-01 11,791
Total number of active participants reported on line 7a of the Form 5500 2018-01-01 8,497
Number of retired or separated participants receiving benefits 2018-01-01 19
Number of other retired or separated participants entitled to future benefits 2018-01-01 3,577
Total of all active and inactive participants 2018-01-01 12,093
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2018-01-01 18
Total participants 2018-01-01 12,111
Number of participants with account balances 2018-01-01 11,909
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2018-01-01 274
2017: WESTERN DIGITAL CORPORATION 401(K) PLAN 2017 401k membership
Total participants, beginning-of-year 2017-01-01 11,283
Total number of active participants reported on line 7a of the Form 5500 2017-01-01 8,456
Number of retired or separated participants receiving benefits 2017-01-01 18
Number of other retired or separated participants entitled to future benefits 2017-01-01 3,302
Total of all active and inactive participants 2017-01-01 11,776
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2017-01-01 15
Total participants 2017-01-01 11,791
Number of participants with account balances 2017-01-01 11,501
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2017-01-01 181
2016: WESTERN DIGITAL CORPORATION 401(K) PLAN 2016 401k membership
Total participants, beginning-of-year 2016-01-01 8,977
Total number of active participants reported on line 7a of the Form 5500 2016-01-01 8,190
Number of retired or separated participants receiving benefits 2016-01-01 11
Number of other retired or separated participants entitled to future benefits 2016-01-01 3,069
Total of all active and inactive participants 2016-01-01 11,270
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2016-01-01 13
Total participants 2016-01-01 11,283
Number of participants with account balances 2016-01-01 11,039
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2016-01-01 270
2015: WESTERN DIGITAL CORPORATION 401(K) PLAN 2015 401k membership
Total participants, beginning-of-year 2015-01-01 9,057
Total number of active participants reported on line 7a of the Form 5500 2015-01-01 6,906
Number of retired or separated participants receiving benefits 2015-01-01 8
Number of other retired or separated participants entitled to future benefits 2015-01-01 2,435
Total of all active and inactive participants 2015-01-01 9,349
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2015-01-01 11
Total participants 2015-01-01 9,360
Number of participants with account balances 2015-01-01 9,146
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2015-01-01 663
2014: WESTERN DIGITAL CORPORATION 401(K) PLAN 2014 401k membership
Total participants, beginning-of-year 2014-01-01 8,557
Total number of active participants reported on line 7a of the Form 5500 2014-01-01 7,373
Number of retired or separated participants receiving benefits 2014-01-01 4
Number of other retired or separated participants entitled to future benefits 2014-01-01 1,596
Total of all active and inactive participants 2014-01-01 8,973
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits 2014-01-01 7
Total participants 2014-01-01 8,980
Number of participants with account balances 2014-01-01 8,768
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested 2014-01-01 319

Measure	Date	Value
2022: WESTERN DIGITAL CORPORATION 401(K) PLAN 2022 401k membership
Total participants, beginning-of-year	2022-01-01	11,319
Total number of active participants reported on line 7a of the Form 5500	2022-01-01	7,690
Number of retired or separated participants receiving benefits	2022-01-01	299
Number of other retired or separated participants entitled to future benefits	2022-01-01	3,669
Total of all active and inactive participants	2022-01-01	11,658
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2022-01-01	39
Total participants	2022-01-01	11,697
Number of participants with account balances	2022-01-01	11,598
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2022-01-01	4
2021: WESTERN DIGITAL CORPORATION 401(K) PLAN 2021 401k membership
Total participants, beginning-of-year	2021-01-01	11,901
Total number of active participants reported on line 7a of the Form 5500	2021-01-01	7,874
Number of retired or separated participants receiving benefits	2021-01-01	36
Number of other retired or separated participants entitled to future benefits	2021-01-01	3,386
Total of all active and inactive participants	2021-01-01	11,296
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2021-01-01	23
Total participants	2021-01-01	11,319
Number of participants with account balances	2021-01-01	11,123
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2021-01-01	217
2020: WESTERN DIGITAL CORPORATION 401(K) PLAN 2020 401k membership
Total participants, beginning-of-year	2020-01-01	11,879
Total number of active participants reported on line 7a of the Form 5500	2020-01-01	7,985
Number of retired or separated participants receiving benefits	2020-01-01	38
Number of other retired or separated participants entitled to future benefits	2020-01-01	3,864
Total of all active and inactive participants	2020-01-01	11,887
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2020-01-01	23
Total participants	2020-01-01	11,910
Number of participants with account balances	2020-01-01	11,733
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2020-01-01	252
2019: WESTERN DIGITAL CORPORATION 401(K) PLAN 2019 401k membership
Total participants, beginning-of-year	2019-01-01	12,146
Total number of active participants reported on line 7a of the Form 5500	2019-01-01	7,934
Number of retired or separated participants receiving benefits	2019-01-01	25
Number of other retired or separated participants entitled to future benefits	2019-01-01	3,905
Total of all active and inactive participants	2019-01-01	11,864
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2019-01-01	25
Total participants	2019-01-01	11,889
Number of participants with account balances	2019-01-01	11,645
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2019-01-01	349
2018: WESTERN DIGITAL CORPORATION 401(K) PLAN 2018 401k membership
Total participants, beginning-of-year	2018-01-01	11,791
Total number of active participants reported on line 7a of the Form 5500	2018-01-01	8,497
Number of retired or separated participants receiving benefits	2018-01-01	19
Number of other retired or separated participants entitled to future benefits	2018-01-01	3,577
Total of all active and inactive participants	2018-01-01	12,093
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2018-01-01	18
Total participants	2018-01-01	12,111
Number of participants with account balances	2018-01-01	11,909
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2018-01-01	274
2017: WESTERN DIGITAL CORPORATION 401(K) PLAN 2017 401k membership
Total participants, beginning-of-year	2017-01-01	11,283
Total number of active participants reported on line 7a of the Form 5500	2017-01-01	8,456
Number of retired or separated participants receiving benefits	2017-01-01	18
Number of other retired or separated participants entitled to future benefits	2017-01-01	3,302
Total of all active and inactive participants	2017-01-01	11,776
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2017-01-01	15
Total participants	2017-01-01	11,791
Number of participants with account balances	2017-01-01	11,501
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2017-01-01	181
2016: WESTERN DIGITAL CORPORATION 401(K) PLAN 2016 401k membership
Total participants, beginning-of-year	2016-01-01	8,977
Total number of active participants reported on line 7a of the Form 5500	2016-01-01	8,190
Number of retired or separated participants receiving benefits	2016-01-01	11
Number of other retired or separated participants entitled to future benefits	2016-01-01	3,069
Total of all active and inactive participants	2016-01-01	11,270
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2016-01-01	13
Total participants	2016-01-01	11,283
Number of participants with account balances	2016-01-01	11,039
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2016-01-01	270
2015: WESTERN DIGITAL CORPORATION 401(K) PLAN 2015 401k membership
Total participants, beginning-of-year	2015-01-01	9,057
Total number of active participants reported on line 7a of the Form 5500	2015-01-01	6,906
Number of retired or separated participants receiving benefits	2015-01-01	8
Number of other retired or separated participants entitled to future benefits	2015-01-01	2,435
Total of all active and inactive participants	2015-01-01	9,349
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2015-01-01	11
Total participants	2015-01-01	9,360
Number of participants with account balances	2015-01-01	9,146
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2015-01-01	663
2014: WESTERN DIGITAL CORPORATION 401(K) PLAN 2014 401k membership
Total participants, beginning-of-year	2014-01-01	8,557
Total number of active participants reported on line 7a of the Form 5500	2014-01-01	7,373
Number of retired or separated participants receiving benefits	2014-01-01	4
Number of other retired or separated participants entitled to future benefits	2014-01-01	1,596
Total of all active and inactive participants	2014-01-01	8,973
Number of deceased participants whose beneficiaries are receiving or are entitled to receive benefits	2014-01-01	7
Total participants	2014-01-01	8,980
Number of participants with account balances	2014-01-01	8,768
Participants that terminated employment during the plan year with accrued benefits that were less than 100% vested	2014-01-01	319

Financial Data on WESTERN DIGITAL CORPORATION 401(K) PLAN

Measure	Date	Value
2022 : WESTERN DIGITAL CORPORATION 401(K) PLAN 2022 401k financial data
Unrealized appreciation/depreciation of real estate assets	2022-12-31	$0
Unrealized appreciation/depreciation of other (non real estate) assets	2022-12-31	$-15,334,738
Total unrealized appreciation/depreciation of assets	2022-12-31	$-15,334,738
Total transfer of assets to this plan	2022-12-31	$0
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2022-12-31	$10
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2022-12-31	$0
Expenses. Interest paid	2022-12-31	$0
Amount of participant contributions which was failed to transmit to the plan within the time period described in 29 CFR 251.3-102	2022-12-31	$0
Total income from all sources (including contributions)	2022-12-31	$-244,939,224
Total loss/gain on sale of assets	2022-12-31	$4,954,334
Total of all expenses incurred	2022-12-31	$147,763,068
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2022-12-31	$146,752,998
Expenses. Certain deemed distributions of participant loans	2022-12-31	$417,868
Value of total corrective distributions	2022-12-31	$9,083
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2022-12-31	$164,583,538
Value of total assets at end of year	2022-12-31	$1,987,625,395
Value of total assets at beginning of year	2022-12-31	$2,380,327,677
Total of administrative expenses incurred including professional, contract, advisory and management fees	2022-12-31	$583,119
Total income from rents	2022-12-31	$0
Total interest from all sources	2022-12-31	$511,254
Total dividends received (eg from common stock, registered investment company shares)	2022-12-31	$30,755,992
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2022-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2022-12-31	$30,755,992
Assets. Real estate other than employer real property at end of year	2022-12-31	$0
Assets. Real estate other than employer real property at beginning of year	2022-12-31	$0
Administrative expenses professional fees incurred	2022-12-31	$27,450
Assets. Corporate prefeered stocks other than exployer securities at end of year	2022-12-31	$0
Assets. Corporate prefeered stocks other than exployer securities at beginning of year	2022-12-31	$0
Was this plan covered by a fidelity bond	2022-12-31	Yes
Value of fidelity bond cover	2022-12-31	$15,000,000
If this is an individual account plan, was there a blackout period	2022-12-31	Yes
Were there any nonexempt tranactions with any party-in-interest	2022-12-31	No
Contributions received from participants	2022-12-31	$120,044,480
Participant contributions at end of year	2022-12-31	$13,707,754
Participant contributions at beginning of year	2022-12-31	$13,984,163
Participant contributions at end of year	2022-12-31	$0
Participant contributions at beginning of year	2022-12-31	$7,577
Assets. Other investments not covered elsewhere at end of year	2022-12-31	$30,561,758
Assets. Other investments not covered elsewhere at beginning of year	2022-12-31	$38,425,806
Income. Received or receivable in cash from other sources (including rollovers)	2022-12-31	$10,345,464
Expenses. Other payments made (not to insurance carriers or or participants/beneficiaries)	2022-12-31	$0
Value of other receiveables (less allowance for doubtful accounts) at end of year	2022-12-31	$9,892
Value of other receiveables (less allowance for doubtful accounts) at beginning of year	2022-12-31	$0
Assets. Loans (other than to participants) at end of year	2022-12-31	$0
Assets. Loans (other than to participants) at beginning of year	2022-12-31	$0
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year	2022-12-31	$10
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year	2022-12-31	$0
Other income not declared elsewhere	2022-12-31	$-17,998,049
Administrative expenses (other) incurred	2022-12-31	$349,880
Total non interest bearing cash at end of year	2022-12-31	$7,507,675
Total non interest bearing cash at beginning of year	2022-12-31	$7,955,453
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2022-12-31	No
Income. Non cash contributions	2022-12-31	$0
Value of net income/loss	2022-12-31	$-392,702,292
Value of net assets at end of year (total assets less liabilities)	2022-12-31	$1,987,625,385
Value of net assets at beginning of year (total assets less liabilities)	2022-12-31	$2,380,327,677
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2022-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2022-12-31	No
Were any leases to which the plan was party in default or uncollectible	2022-12-31	No
Assets. partnership/joint venture interests at end of year	2022-12-31	$0
Assets. partnership/joint venture interests at beginning of year	2022-12-31	$0
Investment advisory and management fees	2022-12-31	$205,789
Value of interest in registered invesment companies (eg mutual funds) at end of year	2022-12-31	$555,607,318
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2022-12-31	$676,876,214
Value of interest in pooled separate accounts at end of year	2022-12-31	$0
Value of interest in pooled separate accounts at beginning of year	2022-12-31	$0
Interest on participant loans	2022-12-31	$511,254
Income. Interest from loans (other than to participants)	2022-12-31	$0
Interest earned on other investments	2022-12-31	$0
Income. Interest from US Government securities	2022-12-31	$0
Income. Interest from corporate debt instruments	2022-12-31	$0
Value of interest in master investment trust accounts at end of year	2022-12-31	$0
Value of interest in master investment trust accounts at beginning of year	2022-12-31	$0
Value of interest in common/collective trusts at end of year	2022-12-31	$1,376,668,107
Value of interest in common/collective trusts at beginning of year	2022-12-31	$1,594,942,746
Value of interest bearing cash (including money market accounts and certificates of deposits) at end of year	2022-12-31	$0
Interest-bearing cash (include money market accounts & certificates of deposit) at beginning of the Year	2022-12-31	$0
Value of interest bearing cash (including money market accounts and certificates of deposits) at beginning of year	2022-12-31	$0
Interest earned from interest bearing cash (including money market accounts and certificates of deposit)	2022-12-31	$0
Assets. Value of investments in 103.12 investment entities at end of year	2022-12-31	$0
Assets. Value of investments in 103.12 investment entities at beginning of year	2022-12-31	$0
Value of funds held in insurance company general accounts (unallocated contracts) at end of year	2022-12-31	$0
Value of funds held in insurance company general accounts (unallocated contracts) at beginning of year	2022-12-31	$0
Expenses. Payments to insurance carriers foe the provision of benefits	2022-12-31	$0
Asset value of US Government securities at end of year	2022-12-31	$0
Asset value of US Government securities at beginning of year	2022-12-31	$0
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2022-12-31	$-153,206,939
Net investment gain/loss from pooled separate accounts	2022-12-31	$0
Net investment gain or loss from common/collective trusts	2022-12-31	$-259,204,616
Net gain/loss from 103.12 investment entities	2022-12-31	$0
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2022-12-31	No
Was there a failure to transmit to the plan any participant contributions	2022-12-31	No
Has the plan failed to provide any benefit when due under the plan	2022-12-31	No
Assets. Invements in employer securities at end of year	2022-12-31	$100,424
Assets. Invements in employer securities at beginning of year	2022-12-31	$43,508,067
Assets. Value of employer real property at end of year	2022-12-31	$0
Assets. Value of employer real property at beginning of year	2022-12-31	$0
Contributions received in cash from employer	2022-12-31	$34,193,594
Employer contributions (assets) at end of year	2022-12-31	$3,462,467
Employer contributions (assets) at beginning of year	2022-12-31	$4,627,651
Income. Dividends from preferred stock	2022-12-31	$0
Income. Dividends from common stock	2022-12-31	$0
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2022-12-31	$146,752,998
Asset. Corporate debt instrument preferred debt at end of year	2022-12-31	$0
Asset. Corporate debt instrument preferred debt at beginning of year	2022-12-31	$0
Asset. Corporate debt instrument debt (other) at end of year	2022-12-31	$0
Asset. Corporate debt instrument debt (other) at beginning of year	2022-12-31	$0
Contract administrator fees	2022-12-31	$0
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	2022-12-31	Yes
Assets. Corporate common stocks other than exployer securities at end of year	2022-12-31	$0
Assets. Corporate common stocks other than exployer securities at beginning of year	2022-12-31	$0
Liabilities. Value of benefit claims payable at end of year	2022-12-31	$0
Liabilities. Value of benefit claims payable at beginning of year	2022-12-31	$0
Assets. Value of buildings and other operty used in plan operation at end of year	2022-12-31	$0
Assets. Value of buildings and other operty used in plan operation at beginning of year	2022-12-31	$0
Did the plan have assets held for investment	2022-12-31	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	2022-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2022-12-31	No
Aggregate proceeds on sale of assets	2022-12-31	$33,331,824
Aggregate carrying amount (costs) on sale of assets	2022-12-31	$28,377,490
Liabilities. Value of acquisition indebtedness at end of year	2022-12-31	$0
Liabilities. Value of acquisition indebtedness at beginning of year	2022-12-31	$0
Opinion of an independent qualified public accountant for this plan	2022-12-31	Unqualified
Accountancy firm name	2022-12-31	MOSS ADAMS, LLP
Accountancy firm EIN	2022-12-31	910189318
2021 : WESTERN DIGITAL CORPORATION 401(K) PLAN 2021 401k financial data
Total unrealized appreciation/depreciation of assets	2021-12-31	$0
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2021-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2021-12-31	$404,337
Total income from all sources (including contributions)	2021-12-31	$469,014,881
Total loss/gain on sale of assets	2021-12-31	$9,406,102
Total of all expenses incurred	2021-12-31	$327,414,310
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2021-12-31	$326,726,305
Value of total corrective distributions	2021-12-31	$33,424
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2021-12-31	$162,441,896
Value of total assets at end of year	2021-12-31	$2,380,327,677
Value of total assets at beginning of year	2021-12-31	$2,239,131,443
Total of administrative expenses incurred including professional, contract, advisory and management fees	2021-12-31	$654,581
Total interest from all sources	2021-12-31	$741,725
Total dividends received (eg from common stock, registered investment company shares)	2021-12-31	$88,531,079
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2021-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2021-12-31	$88,531,079
Administrative expenses professional fees incurred	2021-12-31	$80,283
Was this plan covered by a fidelity bond	2021-12-31	Yes
Value of fidelity bond cover	2021-12-31	$15,000,000
If this is an individual account plan, was there a blackout period	2021-12-31	Yes
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2021-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2021-12-31	No
Contributions received from participants	2021-12-31	$117,392,184
Participant contributions at end of year	2021-12-31	$13,984,163
Participant contributions at beginning of year	2021-12-31	$14,828,790
Participant contributions at end of year	2021-12-31	$7,577
Participant contributions at beginning of year	2021-12-31	$0
Assets. Other investments not covered elsewhere at end of year	2021-12-31	$38,425,806
Assets. Other investments not covered elsewhere at beginning of year	2021-12-31	$24,473,861
Income. Received or receivable in cash from other sources (including rollovers)	2021-12-31	$11,022,641
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year	2021-12-31	$0
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year	2021-12-31	$404,337
Other income not declared elsewhere	2021-12-31	$2,277,433
Administrative expenses (other) incurred	2021-12-31	$417,227
Total non interest bearing cash at end of year	2021-12-31	$7,955,453
Total non interest bearing cash at beginning of year	2021-12-31	$7,489,287
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2021-12-31	No
Value of net income/loss	2021-12-31	$141,600,571
Value of net assets at end of year (total assets less liabilities)	2021-12-31	$2,380,327,677
Value of net assets at beginning of year (total assets less liabilities)	2021-12-31	$2,238,727,106
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2021-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2021-12-31	No
Were any leases to which the plan was party in default or uncollectible	2021-12-31	No
Investment advisory and management fees	2021-12-31	$157,071
Value of interest in registered invesment companies (eg mutual funds) at end of year	2021-12-31	$676,876,214
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2021-12-31	$657,652,223
Interest on participant loans	2021-12-31	$741,725
Value of interest in common/collective trusts at end of year	2021-12-31	$1,594,942,746
Value of interest in common/collective trusts at beginning of year	2021-12-31	$1,474,451,214
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2021-12-31	$-7,959,508
Net investment gain or loss from common/collective trusts	2021-12-31	$213,576,154
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2021-12-31	No
Was there a failure to transmit to the plan any participant contributions	2021-12-31	No
Has the plan failed to provide any benefit when due under the plan	2021-12-31	No
Assets. Invements in employer securities at end of year	2021-12-31	$43,508,067
Assets. Invements in employer securities at beginning of year	2021-12-31	$55,950,928
Contributions received in cash from employer	2021-12-31	$34,027,071
Employer contributions (assets) at end of year	2021-12-31	$4,627,651
Employer contributions (assets) at beginning of year	2021-12-31	$4,285,140
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2021-12-31	$326,726,305
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	2021-12-31	Yes
Did the plan have assets held for investment	2021-12-31	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	2021-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2021-12-31	No
Aggregate proceeds on sale of assets	2021-12-31	$68,738,428
Aggregate carrying amount (costs) on sale of assets	2021-12-31	$59,332,326
Opinion of an independent qualified public accountant for this plan	2021-12-31	Unqualified
Accountancy firm name	2021-12-31	MOSS ADAMS, LLP
Accountancy firm EIN	2021-12-31	910189318
2020 : WESTERN DIGITAL CORPORATION 401(K) PLAN 2020 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2020-12-31	$-190,272
Total unrealized appreciation/depreciation of assets	2020-12-31	$-190,272
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2020-12-31	$404,337
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2020-12-31	$299,523
Total income from all sources (including contributions)	2020-12-31	$466,927,520
Total loss/gain on sale of assets	2020-12-31	$-4,342,266
Total of all expenses incurred	2020-12-31	$126,124,268
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2020-12-31	$125,402,650
Expenses. Certain deemed distributions of participant loans	2020-12-31	$9,766
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2020-12-31	$157,956,225
Value of total assets at end of year	2020-12-31	$2,239,131,443
Value of total assets at beginning of year	2020-12-31	$1,898,223,377
Total of administrative expenses incurred including professional, contract, advisory and management fees	2020-12-31	$711,852
Total interest from all sources	2020-12-31	$830,712
Total dividends received (eg from common stock, registered investment company shares)	2020-12-31	$41,028,233
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2020-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2020-12-31	$40,096,600
Administrative expenses professional fees incurred	2020-12-31	$82,800
Was this plan covered by a fidelity bond	2020-12-31	Yes
Value of fidelity bond cover	2020-12-31	$15,000,000
If this is an individual account plan, was there a blackout period	2020-12-31	Yes
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2020-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2020-12-31	No
Contributions received from participants	2020-12-31	$113,537,281
Participant contributions at end of year	2020-12-31	$14,828,790
Participant contributions at beginning of year	2020-12-31	$16,412,679
Assets. Other investments not covered elsewhere at end of year	2020-12-31	$24,473,861
Assets. Other investments not covered elsewhere at beginning of year	2020-12-31	$6,320,249
Income. Received or receivable in cash from other sources (including rollovers)	2020-12-31	$11,391,112
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year	2020-12-31	$404,337
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year	2020-12-31	$299,523
Other income not declared elsewhere	2020-12-31	$7,994,743
Administrative expenses (other) incurred	2020-12-31	$438,068
Total non interest bearing cash at end of year	2020-12-31	$7,489,287
Total non interest bearing cash at beginning of year	2020-12-31	$1,956,079
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2020-12-31	No
Value of net income/loss	2020-12-31	$340,803,252
Value of net assets at end of year (total assets less liabilities)	2020-12-31	$2,238,727,106
Value of net assets at beginning of year (total assets less liabilities)	2020-12-31	$1,897,923,854
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2020-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2020-12-31	No
Were any leases to which the plan was party in default or uncollectible	2020-12-31	No
Investment advisory and management fees	2020-12-31	$190,984
Value of interest in registered invesment companies (eg mutual funds) at end of year	2020-12-31	$657,652,223
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2020-12-31	$766,682,806
Interest on participant loans	2020-12-31	$830,712
Value of interest in common/collective trusts at end of year	2020-12-31	$1,474,451,214
Value of interest in common/collective trusts at beginning of year	2020-12-31	$1,046,898,212
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2020-12-31	$65,834,114
Net investment gain or loss from common/collective trusts	2020-12-31	$197,816,031
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2020-12-31	No
Was there a failure to transmit to the plan any participant contributions	2020-12-31	No
Has the plan failed to provide any benefit when due under the plan	2020-12-31	No
Assets. Invements in employer securities at end of year	2020-12-31	$55,950,928
Assets. Invements in employer securities at beginning of year	2020-12-31	$57,744,631
Contributions received in cash from employer	2020-12-31	$33,027,832
Employer contributions (assets) at end of year	2020-12-31	$4,285,140
Employer contributions (assets) at beginning of year	2020-12-31	$2,208,721
Income. Dividends from common stock	2020-12-31	$931,633
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2020-12-31	$125,402,650
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	2020-12-31	Yes
Did the plan have assets held for investment	2020-12-31	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	2020-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2020-12-31	No
Aggregate proceeds on sale of assets	2020-12-31	$16,770,614
Aggregate carrying amount (costs) on sale of assets	2020-12-31	$21,112,880
Opinion of an independent qualified public accountant for this plan	2020-12-31	Unqualified
Accountancy firm name	2020-12-31	MOSS ADAMS, LLP
Accountancy firm EIN	2020-12-31	910189318
2019 : WESTERN DIGITAL CORPORATION 401(K) PLAN 2019 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2019-12-31	$21,618,711
Total unrealized appreciation/depreciation of assets	2019-12-31	$21,618,711
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2019-12-31	$299,523
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2019-12-31	$240,324
Total income from all sources (including contributions)	2019-12-31	$517,543,013
Total loss/gain on sale of assets	2019-12-31	$2,856,067
Total of all expenses incurred	2019-12-31	$128,032,578
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2019-12-31	$127,310,612
Expenses. Certain deemed distributions of participant loans	2019-12-31	$24,628
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2019-12-31	$146,618,004
Value of total assets at end of year	2019-12-31	$1,898,223,377
Value of total assets at beginning of year	2019-12-31	$1,508,653,743
Total of administrative expenses incurred including professional, contract, advisory and management fees	2019-12-31	$697,338
Total interest from all sources	2019-12-31	$865,446
Total dividends received (eg from common stock, registered investment company shares)	2019-12-31	$32,505,628
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2019-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2019-12-31	$30,702,163
Administrative expenses professional fees incurred	2019-12-31	$48,880
Was this plan covered by a fidelity bond	2019-12-31	Yes
Value of fidelity bond cover	2019-12-31	$15,000,000
If this is an individual account plan, was there a blackout period	2019-12-31	Yes
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2019-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2019-12-31	No
Contributions received from participants	2019-12-31	$106,276,470
Participant contributions at end of year	2019-12-31	$16,412,679
Participant contributions at beginning of year	2019-12-31	$15,829,979
Assets. Other investments not covered elsewhere at end of year	2019-12-31	$6,320,249
Assets. Other investments not covered elsewhere at beginning of year	2019-12-31	$4,204,159
Income. Received or receivable in cash from other sources (including rollovers)	2019-12-31	$11,139,835
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year	2019-12-31	$299,523
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year	2019-12-31	$240,324
Other income not declared elsewhere	2019-12-31	$1,389,550
Administrative expenses (other) incurred	2019-12-31	$458,999
Total non interest bearing cash at end of year	2019-12-31	$1,956,079
Total non interest bearing cash at beginning of year	2019-12-31	$1,099,726
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2019-12-31	No
Value of net income/loss	2019-12-31	$389,510,435
Value of net assets at end of year (total assets less liabilities)	2019-12-31	$1,897,923,854
Value of net assets at beginning of year (total assets less liabilities)	2019-12-31	$1,508,413,419
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2019-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2019-12-31	No
Were any leases to which the plan was party in default or uncollectible	2019-12-31	No
Investment advisory and management fees	2019-12-31	$189,459
Value of interest in registered invesment companies (eg mutual funds) at end of year	2019-12-31	$766,682,806
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2019-12-31	$600,235,441
Interest on participant loans	2019-12-31	$865,446
Value of interest in common/collective trusts at end of year	2019-12-31	$1,046,898,212
Value of interest in common/collective trusts at beginning of year	2019-12-31	$850,732,224
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2019-12-31	$138,829,488
Net investment gain or loss from common/collective trusts	2019-12-31	$172,860,119
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2019-12-31	No
Was there a failure to transmit to the plan any participant contributions	2019-12-31	Yes
Has the plan failed to provide any benefit when due under the plan	2019-12-31	No
Assets. Invements in employer securities at end of year	2019-12-31	$57,744,631
Assets. Invements in employer securities at beginning of year	2019-12-31	$32,146,506
Contributions received in cash from employer	2019-12-31	$29,201,699
Employer contributions (assets) at end of year	2019-12-31	$2,208,721
Employer contributions (assets) at beginning of year	2019-12-31	$4,405,708
Income. Dividends from common stock	2019-12-31	$1,803,465
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2019-12-31	$127,310,612
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	2019-12-31	Yes
Did the plan have assets held for investment	2019-12-31	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	2019-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2019-12-31	No
Aggregate proceeds on sale of assets	2019-12-31	$10,923,755
Aggregate carrying amount (costs) on sale of assets	2019-12-31	$8,067,688
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2019-12-31	No
Opinion of an independent qualified public accountant for this plan	2019-12-31	Unqualified
Accountancy firm name	2019-12-31	BDO USA, LLP
Accountancy firm EIN	2019-12-31	135381590
2018 : WESTERN DIGITAL CORPORATION 401(K) PLAN 2018 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2018-12-31	$-33,304,574
Total unrealized appreciation/depreciation of assets	2018-12-31	$-33,304,574
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2018-12-31	$240,324
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2018-12-31	$118,325
Total income from all sources (including contributions)	2018-12-31	$54,278,485
Total loss/gain on sale of assets	2018-12-31	$-827,192
Total of all expenses incurred	2018-12-31	$90,572,000
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2018-12-31	$89,706,559
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2018-12-31	$168,412,211
Value of total assets at end of year	2018-12-31	$1,508,653,743
Value of total assets at beginning of year	2018-12-31	$1,544,825,259
Total of administrative expenses incurred including professional, contract, advisory and management fees	2018-12-31	$865,441
Total interest from all sources	2018-12-31	$747,427
Total dividends received (eg from common stock, registered investment company shares)	2018-12-31	$57,654,463
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2018-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2018-12-31	$56,112,743
Administrative expenses professional fees incurred	2018-12-31	$191,500
Was this plan covered by a fidelity bond	2018-12-31	Yes
Value of fidelity bond cover	2018-12-31	$15,000,000
If this is an individual account plan, was there a blackout period	2018-12-31	Yes
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2018-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2018-12-31	No
Contributions received from participants	2018-12-31	$119,084,026
Participant contributions at end of year	2018-12-31	$15,829,979
Participant contributions at beginning of year	2018-12-31	$15,326,809
Assets. Other investments not covered elsewhere at end of year	2018-12-31	$4,204,159
Assets. Other investments not covered elsewhere at beginning of year	2018-12-31	$3,350,448
Income. Received or receivable in cash from other sources (including rollovers)	2018-12-31	$14,790,825
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year	2018-12-31	$240,324
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year	2018-12-31	$118,325
Other income not declared elsewhere	2018-12-31	$1,402,533
Administrative expenses (other) incurred	2018-12-31	$637,368
Total non interest bearing cash at end of year	2018-12-31	$1,099,726
Total non interest bearing cash at beginning of year	2018-12-31	$918,332
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2018-12-31	No
Value of net income/loss	2018-12-31	$-36,293,515
Value of net assets at end of year (total assets less liabilities)	2018-12-31	$1,508,413,419
Value of net assets at beginning of year (total assets less liabilities)	2018-12-31	$1,544,706,934
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2018-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2018-12-31	No
Were any leases to which the plan was party in default or uncollectible	2018-12-31	No
Investment advisory and management fees	2018-12-31	$36,573
Value of interest in registered invesment companies (eg mutual funds) at end of year	2018-12-31	$600,235,441
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2018-12-31	$1,291,342,404
Interest on participant loans	2018-12-31	$747,427
Value of interest in common/collective trusts at end of year	2018-12-31	$850,732,224
Value of interest in common/collective trusts at beginning of year	2018-12-31	$165,663,552
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2018-12-31	$-66,286,017
Net investment gain or loss from common/collective trusts	2018-12-31	$-73,520,366
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2018-12-31	No
Was there a failure to transmit to the plan any participant contributions	2018-12-31	Yes
Has the plan failed to provide any benefit when due under the plan	2018-12-31	No
Assets. Invements in employer securities at end of year	2018-12-31	$32,146,506
Assets. Invements in employer securities at beginning of year	2018-12-31	$61,241,786
Contributions received in cash from employer	2018-12-31	$34,537,360
Employer contributions (assets) at end of year	2018-12-31	$4,405,708
Employer contributions (assets) at beginning of year	2018-12-31	$6,981,928
Income. Dividends from common stock	2018-12-31	$1,541,720
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2018-12-31	$89,706,559
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	2018-12-31	Yes
Did the plan have assets held for investment	2018-12-31	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	2018-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2018-12-31	No
Aggregate proceeds on sale of assets	2018-12-31	$13,517,876
Aggregate carrying amount (costs) on sale of assets	2018-12-31	$14,345,068
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2018-12-31	No
Opinion of an independent qualified public accountant for this plan	2018-12-31	Unqualified
Accountancy firm name	2018-12-31	BDO USA, LLP
Accountancy firm EIN	2018-12-31	135381590
2017 : WESTERN DIGITAL CORPORATION 401(K) PLAN 2017 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2017-12-31	$6,740,488
Total unrealized appreciation/depreciation of assets	2017-12-31	$6,740,488
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2017-12-31	$118,325
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2017-12-31	$77,758
Total income from all sources (including contributions)	2017-12-31	$387,320,568
Total loss/gain on sale of assets	2017-12-31	$3,066,153
Total of all expenses incurred	2017-12-31	$82,966,388
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2017-12-31	$82,356,937
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2017-12-31	$159,294,943
Value of total assets at end of year	2017-12-31	$1,544,825,259
Value of total assets at beginning of year	2017-12-31	$1,240,430,512
Total of administrative expenses incurred including professional, contract, advisory and management fees	2017-12-31	$609,451
Total interest from all sources	2017-12-31	$655,522
Total dividends received (eg from common stock, registered investment company shares)	2017-12-31	$64,760,353
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2017-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2017-12-31	$63,181,183
Administrative expenses professional fees incurred	2017-12-31	$196,450
Was this plan covered by a fidelity bond	2017-12-31	Yes
Value of fidelity bond cover	2017-12-31	$15,000,000
If this is an individual account plan, was there a blackout period	2017-12-31	Yes
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2017-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2017-12-31	No
Contributions received from participants	2017-12-31	$109,492,648
Participant contributions at end of year	2017-12-31	$15,326,809
Participant contributions at beginning of year	2017-12-31	$15,195,178
Assets. Other investments not covered elsewhere at end of year	2017-12-31	$3,350,448
Assets. Other investments not covered elsewhere at beginning of year	2017-12-31	$2,868,079
Income. Received or receivable in cash from other sources (including rollovers)	2017-12-31	$13,895,137
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year	2017-12-31	$118,325
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year	2017-12-31	$77,758
Other income not declared elsewhere	2017-12-31	$1,068,232
Administrative expenses (other) incurred	2017-12-31	$377,722
Total non interest bearing cash at end of year	2017-12-31	$918,332
Total non interest bearing cash at beginning of year	2017-12-31	$10,105
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2017-12-31	No
Value of net income/loss	2017-12-31	$304,354,180
Value of net assets at end of year (total assets less liabilities)	2017-12-31	$1,544,706,934
Value of net assets at beginning of year (total assets less liabilities)	2017-12-31	$1,240,352,754
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2017-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2017-12-31	No
Were any leases to which the plan was party in default or uncollectible	2017-12-31	No
Investment advisory and management fees	2017-12-31	$35,279
Value of interest in registered invesment companies (eg mutual funds) at end of year	2017-12-31	$1,291,342,404
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2017-12-31	$900,474,931
Interest on participant loans	2017-12-31	$655,522
Value of interest in common/collective trusts at end of year	2017-12-31	$165,663,552
Value of interest in common/collective trusts at beginning of year	2017-12-31	$259,429,179
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2017-12-31	$142,938,769
Net investment gain or loss from common/collective trusts	2017-12-31	$8,796,108
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2017-12-31	No
Was there a failure to transmit to the plan any participant contributions	2017-12-31	Yes
Has the plan failed to provide any benefit when due under the plan	2017-12-31	No
Assets. Invements in employer securities at end of year	2017-12-31	$61,241,786
Assets. Invements in employer securities at beginning of year	2017-12-31	$55,663,990
Contributions received in cash from employer	2017-12-31	$35,907,158
Employer contributions (assets) at end of year	2017-12-31	$6,981,928
Employer contributions (assets) at beginning of year	2017-12-31	$6,789,050
Income. Dividends from common stock	2017-12-31	$1,579,170
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2017-12-31	$82,356,937
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	2017-12-31	Yes
Did the plan have assets held for investment	2017-12-31	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	2017-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2017-12-31	No
Aggregate proceeds on sale of assets	2017-12-31	$17,386,192
Aggregate carrying amount (costs) on sale of assets	2017-12-31	$14,320,039
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2017-12-31	No
Opinion of an independent qualified public accountant for this plan	2017-12-31	Unqualified
Accountancy firm name	2017-12-31	BDO USA, LLP
Accountancy firm EIN	2017-12-31	135381590
2016 : WESTERN DIGITAL CORPORATION 401(K) PLAN 2016 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2016-12-31	$9,139,060
Total unrealized appreciation/depreciation of assets	2016-12-31	$9,139,060
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2016-12-31	$77,758
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2016-12-31	$118,778
Total income from all sources (including contributions)	2016-12-31	$337,748,923
Total loss/gain on sale of assets	2016-12-31	$-1,039,783
Total of all expenses incurred	2016-12-31	$91,945,497
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2016-12-31	$91,757,040
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2016-12-31	$249,321,851
Value of total assets at end of year	2016-12-31	$1,240,430,512
Value of total assets at beginning of year	2016-12-31	$994,668,106
Total of administrative expenses incurred including professional, contract, advisory and management fees	2016-12-31	$188,457
Total interest from all sources	2016-12-31	$605,621
Total dividends received (eg from common stock, registered investment company shares)	2016-12-31	$38,589,637
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2016-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2016-12-31	$37,034,587
Administrative expenses professional fees incurred	2016-12-31	$8,358
Was this plan covered by a fidelity bond	2016-12-31	Yes
Value of fidelity bond cover	2016-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2016-12-31	Yes
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2016-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2016-12-31	No
Contributions received from participants	2016-12-31	$94,297,521
Participant contributions at end of year	2016-12-31	$15,195,178
Participant contributions at beginning of year	2016-12-31	$14,140,899
Assets. Other investments not covered elsewhere at end of year	2016-12-31	$2,868,079
Assets. Other investments not covered elsewhere at beginning of year	2016-12-31	$2,722,716
Income. Received or receivable in cash from other sources (including rollovers)	2016-12-31	$125,835,006
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year	2016-12-31	$77,758
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year	2016-12-31	$118,778
Other income not declared elsewhere	2016-12-31	$1,346,694
Administrative expenses (other) incurred	2016-12-31	$39,468
Total non interest bearing cash at end of year	2016-12-31	$10,105
Total non interest bearing cash at beginning of year	2016-12-31	$2,500
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2016-12-31	No
Value of net income/loss	2016-12-31	$245,803,426
Value of net assets at end of year (total assets less liabilities)	2016-12-31	$1,240,352,754
Value of net assets at beginning of year (total assets less liabilities)	2016-12-31	$994,549,328
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2016-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2016-12-31	No
Were any leases to which the plan was party in default or uncollectible	2016-12-31	No
Investment advisory and management fees	2016-12-31	$140,631
Value of interest in registered invesment companies (eg mutual funds) at end of year	2016-12-31	$900,474,931
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2016-12-31	$712,056,901
Interest on participant loans	2016-12-31	$605,621
Value of interest in common/collective trusts at end of year	2016-12-31	$259,429,179
Value of interest in common/collective trusts at beginning of year	2016-12-31	$217,286,630
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2016-12-31	$28,270,193
Net investment gain or loss from common/collective trusts	2016-12-31	$11,515,650
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2016-12-31	No
Was there a failure to transmit to the plan any participant contributions	2016-12-31	Yes
Has the plan failed to provide any benefit when due under the plan	2016-12-31	No
Assets. Invements in employer securities at end of year	2016-12-31	$55,663,990
Assets. Invements in employer securities at beginning of year	2016-12-31	$43,974,058
Contributions received in cash from employer	2016-12-31	$29,189,324
Employer contributions (assets) at end of year	2016-12-31	$6,789,050
Employer contributions (assets) at beginning of year	2016-12-31	$4,484,402
Income. Dividends from common stock	2016-12-31	$1,555,050
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2016-12-31	$91,757,040
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	2016-12-31	Yes
Did the plan have assets held for investment	2016-12-31	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	2016-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2016-12-31	No
Aggregate proceeds on sale of assets	2016-12-31	$8,209,749
Aggregate carrying amount (costs) on sale of assets	2016-12-31	$9,249,532
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2016-12-31	No
Opinion of an independent qualified public accountant for this plan	2016-12-31	Unqualified
Accountancy firm name	2016-12-31	BDO USA, LLP
Accountancy firm EIN	2016-12-31	135381590
2015 : WESTERN DIGITAL CORPORATION 401(K) PLAN 2015 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2015-12-31	$-32,533,855
Total unrealized appreciation/depreciation of assets	2015-12-31	$-32,533,855
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2015-12-31	$118,778
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2015-12-31	$0
Total income from all sources (including contributions)	2015-12-31	$83,569,429
Total loss/gain on sale of assets	2015-12-31	$-3,816,167
Total of all expenses incurred	2015-12-31	$65,927,646
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2015-12-31	$65,622,140
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2015-12-31	$116,295,381
Value of total assets at end of year	2015-12-31	$994,668,106
Value of total assets at beginning of year	2015-12-31	$976,907,545
Total of administrative expenses incurred including professional, contract, advisory and management fees	2015-12-31	$305,506
Total interest from all sources	2015-12-31	$557,349
Total dividends received (eg from common stock, registered investment company shares)	2015-12-31	$52,242,107
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2015-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2015-12-31	$50,876,971
Administrative expenses professional fees incurred	2015-12-31	$47,100
Was this plan covered by a fidelity bond	2015-12-31	Yes
Value of fidelity bond cover	2015-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2015-12-31	Yes
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2015-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2015-12-31	No
Contributions received from participants	2015-12-31	$85,487,327
Participant contributions at end of year	2015-12-31	$14,140,899
Participant contributions at beginning of year	2015-12-31	$12,854,837
Assets. Other investments not covered elsewhere at end of year	2015-12-31	$2,722,716
Assets. Other investments not covered elsewhere at beginning of year	2015-12-31	$2,241,298
Income. Received or receivable in cash from other sources (including rollovers)	2015-12-31	$6,307,066
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at end of year	2015-12-31	$118,778
Other liabilities (not benefit claims, operating payabales oe acquisition indebtedness) at beginning of year	2015-12-31	$0
Other income not declared elsewhere	2015-12-31	$890,768
Administrative expenses (other) incurred	2015-12-31	$39,744
Total non interest bearing cash at end of year	2015-12-31	$2,500
Total non interest bearing cash at beginning of year	2015-12-31	$105,737
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2015-12-31	No
Value of net income/loss	2015-12-31	$17,641,783
Value of net assets at end of year (total assets less liabilities)	2015-12-31	$994,549,328
Value of net assets at beginning of year (total assets less liabilities)	2015-12-31	$976,907,545
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2015-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2015-12-31	No
Were any leases to which the plan was party in default or uncollectible	2015-12-31	No
Investment advisory and management fees	2015-12-31	$218,662
Value of interest in registered invesment companies (eg mutual funds) at end of year	2015-12-31	$712,056,901
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2015-12-31	$679,340,975
Interest on participant loans	2015-12-31	$557,349
Value of interest in common/collective trusts at end of year	2015-12-31	$217,286,630
Value of interest in common/collective trusts at beginning of year	2015-12-31	$197,695,992
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2015-12-31	$-52,035,157
Net investment gain or loss from common/collective trusts	2015-12-31	$1,969,003
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2015-12-31	No
Was there a failure to transmit to the plan any participant contributions	2015-12-31	Yes
Has the plan failed to provide any benefit when due under the plan	2015-12-31	No
Assets. Invements in employer securities at end of year	2015-12-31	$43,974,058
Assets. Invements in employer securities at beginning of year	2015-12-31	$82,465,607
Contributions received in cash from employer	2015-12-31	$24,500,988
Employer contributions (assets) at end of year	2015-12-31	$4,484,402
Employer contributions (assets) at beginning of year	2015-12-31	$2,203,099
Income. Dividends from common stock	2015-12-31	$1,365,136
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2015-12-31	$65,622,140
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	2015-12-31	Yes
Did the plan have assets held for investment	2015-12-31	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	2015-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2015-12-31	No
Aggregate proceeds on sale of assets	2015-12-31	$16,178,072
Aggregate carrying amount (costs) on sale of assets	2015-12-31	$19,994,239
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2015-12-31	No
Opinion of an independent qualified public accountant for this plan	2015-12-31	Unqualified
Accountancy firm name	2015-12-31	BDO USA, LLP
Accountancy firm EIN	2015-12-31	135381590
2014 : WESTERN DIGITAL CORPORATION 401(K) PLAN 2014 401k financial data
Unrealized appreciation/depreciation of other (non real estate) assets	2014-12-31	$19,349,000
Total unrealized appreciation/depreciation of assets	2014-12-31	$19,349,000
Total liabilities at end of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2014-12-31	$0
Total liabilities at beginning of year (benefit claims payable, operating payabales, acquisition indebtedness and other liabilities)	2014-12-31	$0
Total income from all sources (including contributions)	2014-12-31	$184,181,759
Total loss/gain on sale of assets	2014-12-31	$1,479,235
Total of all expenses incurred	2014-12-31	$37,729,594
Benefit payments and payments to participlants,beneficiaries,insurance carriers and others	2014-12-31	$37,471,619
Total contributions o plan (from employers,participants, others, non cash contrinutions)	2014-12-31	$109,511,916
Value of total assets at end of year	2014-12-31	$976,907,545
Value of total assets at beginning of year	2014-12-31	$830,455,380
Total of administrative expenses incurred including professional, contract, advisory and management fees	2014-12-31	$257,975
Total interest from all sources	2014-12-31	$494,388
Total dividends received (eg from common stock, registered investment company shares)	2014-12-31	$40,715,630
Has a resolution to terminate the plan been adopted during the plan year or any prior plan year	2014-12-31	No
Total dividends received from registered investment company shares (eg mutual funds)	2014-12-31	$39,643,216
Administrative expenses professional fees incurred	2014-12-31	$48,790
Was this plan covered by a fidelity bond	2014-12-31	Yes
Value of fidelity bond cover	2014-12-31	$10,000,000
If this is an individual account plan, was there a blackout period	2014-12-31	Yes
Total value of distributions paid in property other than in cash, annuity contracts, or publicly traded employer securities	2014-12-31	$0
Were there any nonexempt tranactions with any party-in-interest	2014-12-31	No
Contributions received from participants	2014-12-31	$79,107,671
Participant contributions at end of year	2014-12-31	$12,854,837
Participant contributions at beginning of year	2014-12-31	$11,324,100
Assets. Other investments not covered elsewhere at end of year	2014-12-31	$2,241,298
Assets. Other investments not covered elsewhere at beginning of year	2014-12-31	$1,422,434
Income. Received or receivable in cash from other sources (including rollovers)	2014-12-31	$8,830,396
Other income not declared elsewhere	2014-12-31	$814,832
Administrative expenses (other) incurred	2014-12-31	$46,541
Total non interest bearing cash at end of year	2014-12-31	$105,737
Total non interest bearing cash at beginning of year	2014-12-31	$16,799
Did the receive any noncash contributions whose value was neither redily determinable on an established market nor set by an independent third party appraiser	2014-12-31	No
Value of net income/loss	2014-12-31	$146,452,165
Value of net assets at end of year (total assets less liabilities)	2014-12-31	$976,907,545
Value of net assets at beginning of year (total assets less liabilities)	2014-12-31	$830,455,380
Did the plan have a loss casued by fraud or dishonesty (regardless whether reimbursed by fidelity bond)	2014-12-31	No
Were any loans by the plan or fixed income obligations due to the plan in default	2014-12-31	No
Were any leases to which the plan was party in default or uncollectible	2014-12-31	No
Investment advisory and management fees	2014-12-31	$162,644
Value of interest in registered invesment companies (eg mutual funds) at end of year	2014-12-31	$679,340,975
Value of interest in registered invesment companies (eg mutual funds) at beginning of year	2014-12-31	$575,066,459
Interest on participant loans	2014-12-31	$494,388
Value of interest in common/collective trusts at end of year	2014-12-31	$197,695,992
Value of interest in common/collective trusts at beginning of year	2014-12-31	$176,540,086
Net investment gain/loss from registered investment companies (e.g. mutual funds)	2014-12-31	$522,920
Net investment gain or loss from common/collective trusts	2014-12-31	$11,293,838
Were any plan transactions or series of transactions in excess of 5% of the current value of the plan assets	2014-12-31	No
Was there a failure to transmit to the plan any participant contributions	2014-12-31	Yes
Has the plan failed to provide any benefit when due under the plan	2014-12-31	No
Assets. Invements in employer securities at end of year	2014-12-31	$82,465,607
Assets. Invements in employer securities at beginning of year	2014-12-31	$64,341,866
Contributions received in cash from employer	2014-12-31	$21,573,849
Employer contributions (assets) at end of year	2014-12-31	$2,203,099
Employer contributions (assets) at beginning of year	2014-12-31	$1,743,636
Income. Dividends from common stock	2014-12-31	$1,072,414
Benefit payments and payments to provide benefits directly to participlants or beneficiaries including direct rollovers	2014-12-31	$37,471,619
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	2014-12-31	Yes
Did the plan have assets held for investment	2014-12-31	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	2014-12-31	No
Were all the plan assets eitehr distributed to particpants/beneficiaries, transferred to another plan or brought under the control of the PBGC	2014-12-31	No
Aggregate proceeds on sale of assets	2014-12-31	$11,666,010
Aggregate carrying amount (costs) on sale of assets	2014-12-31	$10,186,775
Accountant perfomed limited scope audit pursuant to 29 CFR 2520.103-8 and/or 103-12(d)	2014-12-31	No
Opinion of an independent qualified public accountant for this plan	2014-12-31	Unqualified
Accountancy firm name	2014-12-31	BDO USA, LLP
Accountancy firm EIN	2014-12-31	135381590

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

2022: WESTERN DIGITAL CORPORATION 401(K) PLAN 2022 form 5500 responses
2022-01-01	Type of plan entity	Single employer plan
2022-01-01	Submission has been amended	No
2022-01-01	This submission is the final filing	No
2022-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2022-01-01	Plan is a collectively bargained plan	No
2022-01-01	Plan funding arrangement – Trust	Yes
2022-01-01	Plan benefit arrangement - Trust	Yes
2021: WESTERN DIGITAL CORPORATION 401(K) PLAN 2021 form 5500 responses
2021-01-01	Type of plan entity	Single employer plan
2021-01-01	Submission has been amended	No
2021-01-01	This submission is the final filing	No
2021-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2021-01-01	Plan is a collectively bargained plan	No
2021-01-01	Plan funding arrangement – Trust	Yes
2021-01-01	Plan benefit arrangement - Trust	Yes
2020: WESTERN DIGITAL CORPORATION 401(K) PLAN 2020 form 5500 responses
2020-01-01	Type of plan entity	Single employer plan
2020-01-01	Submission has been amended	No
2020-01-01	This submission is the final filing	No
2020-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2020-01-01	Plan is a collectively bargained plan	No
2020-01-01	Plan funding arrangement – Trust	Yes
2020-01-01	Plan benefit arrangement - Trust	Yes
2019: WESTERN DIGITAL CORPORATION 401(K) PLAN 2019 form 5500 responses
2019-01-01	Type of plan entity	Single employer plan
2019-01-01	Submission has been amended	No
2019-01-01	This submission is the final filing	No
2019-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2019-01-01	Plan is a collectively bargained plan	No
2019-01-01	Plan funding arrangement – Trust	Yes
2019-01-01	Plan benefit arrangement - Trust	Yes
2018: WESTERN DIGITAL CORPORATION 401(K) PLAN 2018 form 5500 responses
2018-01-01	Type of plan entity	Single employer plan
2018-01-01	Submission has been amended	No
2018-01-01	This submission is the final filing	No
2018-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2018-01-01	Plan is a collectively bargained plan	No
2018-01-01	Plan funding arrangement – Trust	Yes
2018-01-01	Plan benefit arrangement - Trust	Yes
2017: WESTERN DIGITAL CORPORATION 401(K) PLAN 2017 form 5500 responses
2017-01-01	Type of plan entity	Single employer plan
2017-01-01	Submission has been amended	No
2017-01-01	This submission is the final filing	No
2017-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2017-01-01	Plan is a collectively bargained plan	No
2017-01-01	Plan funding arrangement – Trust	Yes
2017-01-01	Plan benefit arrangement - Trust	Yes
2016: WESTERN DIGITAL CORPORATION 401(K) PLAN 2016 form 5500 responses
2016-01-01	Type of plan entity	Single employer plan
2016-01-01	Submission has been amended	No
2016-01-01	This submission is the final filing	No
2016-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2016-01-01	Plan is a collectively bargained plan	No
2016-01-01	Plan funding arrangement – Trust	Yes
2016-01-01	Plan benefit arrangement - Trust	Yes
2015: WESTERN DIGITAL CORPORATION 401(K) PLAN 2015 form 5500 responses
2015-01-01	Type of plan entity	Single employer plan
2015-01-01	Submission has been amended	No
2015-01-01	This submission is the final filing	No
2015-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2015-01-01	Plan is a collectively bargained plan	No
2015-01-01	Plan funding arrangement – Trust	Yes
2015-01-01	Plan benefit arrangement - Trust	Yes
2014: WESTERN DIGITAL CORPORATION 401(K) PLAN 2014 form 5500 responses
2014-01-01	Type of plan entity	Single employer plan
2014-01-01	Submission has been amended	No
2014-01-01	This submission is the final filing	No
2014-01-01	This return/report is a short plan year return/report (less than 12 months)	No
2014-01-01	Plan is a collectively bargained plan	No
2014-01-01	Plan funding arrangement – Trust	Yes
2014-01-01	Plan benefit arrangement - Trust	Yes

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Company Name:	WESTERN DIGITAL CORPORATION
Employer identification number (EIN):	330956711
NAIC Classification:	334610

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