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Tan Irving

Disclosed activity across 3 companies

Tapewire entity
1077
SEC CIK
0001729518

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
CISCO SYSTEMS, INC.CSCO · Entity 2802EVP, Chief of OperationsNovember 20, 2020November 24, 2020
STANLEY BLACK & DECKER, INC.SWK · Entity 3378DirectorMarch 19, 2024March 21, 2024
WESTERN DIGITAL CORPWDC · Entity 1010Director · Chief Executive OfficerSeptember 17, 2026September 21, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

CISCO SYSTEMS, INC.

Report date November 20, 2020 · Filed November 24, 2020

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect171,379 Reported balance After 2020-11-20 transaction · row 1 Account or security details depend on footnotes; rows are not merged.
1 source row

Row 1 · 2020-11-20 · Tax withholding · Disposed 4,272 · Balance 171,379

F1: Represents shares withheld for payment of tax liability arising as a result of the partial settlement of a restricted stock unit award originally reported by the reporting person in a Form 3 filed with the Commission on February 1, 2018.

F2: Includes 694 dividend equivalents accrued on unvested restricted stock units. Each dividend equivalent is the economic equivalent of one share of Cisco common stock.

Common StockSEC Table I · non-derivativeDirect167,538 Reported balance After 2020-11-24 transaction · row 2 Account or security details depend on footnotes; rows are not merged.
1 source row

Row 2 · 2020-11-24 · Sale · Disposed 3,841 · Balance 167,538

F3: This transaction was effected pursuant to a Rule 10b5-1 plan adopted by the reporting person on December 8, 2019.

F4: Represents a weighted average sales price per share. These shares were sold in multiple transactions at prices ranging from $41.98 to $42.64. The reporting person has provided to the issuer, and undertakes to provide to the staff of the Commission or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price within the range.

Filing footnotes · ownership attribution and instrument terms

F1: Represents shares withheld for payment of tax liability arising as a result of the partial settlement of a restricted stock unit award originally reported by the reporting person in a Form 3 filed with the Commission on February 1, 2018.

F2: Includes 694 dividend equivalents accrued on unvested restricted stock units. Each dividend equivalent is the economic equivalent of one share of Cisco common stock.

F3: This transaction was effected pursuant to a Rule 10b5-1 plan adopted by the reporting person on December 8, 2019.

F4: Represents a weighted average sales price per share. These shares were sold in multiple transactions at prices ranging from $41.98 to $42.64. The reporting person has provided to the issuer, and undertakes to provide to the staff of the Commission or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price within the range.

STANLEY BLACK & DECKER, INC.

Report date March 19, 2024 · Filed March 21, 2024

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect6,033.9433 Reported balance After 2024-03-19 transaction · row 1
1 source row

Row 1 · 2024-03-19 · Grant · Acquired 54.128 · Balance 6,033.9433

F1: Under the Stanley Black & Decker, Inc. 2020 Restricted Stock Unit Deferral Plan for Non-Employee Directors (the "RSU Deferral Plan"), each director's account is credited with dividend equivalents on the deferred restricted stock units when the Company pays cash dividends on its common stock (including special dividends, if any), and such dividend equivalents are denominated in additional restricted stock units based on the average of the high and low price per share on the New York Stock Exchange on the payment date applicable to such dividend. The number of shares reflects the credit of such dividend equivalents to the reporting person's account under the RSU Deferral Plan.

Deferred SharesSEC Table II · derivative / convertible securityDirect4,714.2272 Reported balance After 2024-03-19 transaction · row 2 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 2 · 2024-03-19 · Grant · Acquired 38.6317 · Balance 4,714.2272

F2: Represents additional deferred shares acquired through the reinvestment of dividends paid on deferred shares credited to the reporting person's account under the Stanley Black & Decker, Inc. Deferred Compensation Plan for Non-Employee Directors (the "Deferred Compensation Plan"). Each deferred share entitles the holder thereof to receive one share of common stock upon settlement. The deferred shares credited to the reporting person's account under the Deferred Compensation Plan, including any additional deferred shares acquired through dividend reinvestment, will be settled in five approximately equal annual installments starting on the first business day of the calendar year immediately following the date on which the reporting person ceases to be a member of the Board of Directors.

Filing footnotes · ownership attribution and instrument terms

F1: Under the Stanley Black & Decker, Inc. 2020 Restricted Stock Unit Deferral Plan for Non-Employee Directors (the "RSU Deferral Plan"), each director's account is credited with dividend equivalents on the deferred restricted stock units when the Company pays cash dividends on its common stock (including special dividends, if any), and such dividend equivalents are denominated in additional restricted stock units based on the average of the high and low price per share on the New York Stock Exchange on the payment date applicable to such dividend. The number of shares reflects the credit of such dividend equivalents to the reporting person's account under the RSU Deferral Plan.

F2: Represents additional deferred shares acquired through the reinvestment of dividends paid on deferred shares credited to the reporting person's account under the Stanley Black & Decker, Inc. Deferred Compensation Plan for Non-Employee Directors (the "Deferred Compensation Plan"). Each deferred share entitles the holder thereof to receive one share of common stock upon settlement. The deferred shares credited to the reporting person's account under the Deferred Compensation Plan, including any additional deferred shares acquired through dividend reinvestment, will be settled in five approximately equal annual installments starting on the first business day of the calendar year immediately following the date on which the reporting person ceases to be a member of the Board of Directors.

WESTERN DIGITAL CORP

Report date September 17, 2026 · Filed September 21, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect265,612.727 Ending reported balance After 2026-09-20 transaction · row 2
2 source rows · reconciled sequence

Row 1 · 2026-09-20 · Exercise / conversion · Acquired 56.762 · Balance 266,703.762

F1: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

Row 2 · 2026-09-20 · Tax withholding · Disposed 1,091.035 · Balance 265,612.727

F2: Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e).

Dividend Equivalent RightsSEC Table II · derivative / convertible securityDirect857.238 Reported balance After 2026-09-17 transaction · row 5 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 5 · 2026-09-17 · Grant · Acquired 83.2995 · Balance 857.238

F3: The dividend equivalent rights accrued on previously awarded restricted stock units (RSUs) which vest proportionately with the RSUs to which they relate. Each dividend equivalent right represents a contingent right to receive one share of the Issuer's common stock or the cash value thereof.

Dividend Equivalent RightsSEC Table II · derivative / convertible securityDirect800.4758 Reported balance After 2026-09-20 transaction · row 6 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 6 · 2026-09-20 · Exercise / conversion · Disposed 56.7622 · Balance 800.4758

F1: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

Common StockSEC Table I · non-derivativeIndirectBy Trust via Inv Co112,500 Reported balance Holding disclosure · report date 2026-09-17 · row 3 Holding and transaction disclosures are not merged.
1 source row

Row 3 · Balance 112,500

Common StockSEC Table I · non-derivativeIndirectby Personal Inv. Co.209,000 Reported balance Holding disclosure · report date 2026-09-17 · row 4 Holding and transaction disclosures are not merged.
1 source row

Row 4 · Balance 209,000

Filing footnotes · ownership attribution and instrument terms

F1: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

F2: Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e).

F3: The dividend equivalent rights accrued on previously awarded restricted stock units (RSUs) which vest proportionately with the RSUs to which they relate. Each dividend equivalent right represents a contingent right to receive one share of the Issuer's common stock or the cash value thereof.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
September 20, 2026 Filed Sep 21, 2026 22:36 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionDividend Equivalent Rights · Derivative 56.7622 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000213 · edgardoc.xml · derivative · entry 6

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 800.4758

Underlying: Common Stock · 56.7622 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

F1 · derivative.exercise_date: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

F1 · derivative.expiration_date: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

Read SEC document
September 20, 2026 Filed Sep 21, 2026 22:36 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Tax withholdingCommon Stock 1,091.035 $441.36 $481,539.21
Disclosure

SEC source: 0001266824-26-000213 · edgardoc.xml · nonDerivative · entry 2

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 265,612.727

F2 · shares: Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e).

Read SEC document
September 20, 2026 Filed Sep 21, 2026 22:36 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionCommon Stock 56.762 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000213 · edgardoc.xml · nonDerivative · entry 1

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 266,703.762

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

Read SEC document
September 17, 2026 Filed Sep 21, 2026 22:36 UTC WESTERN DIGITAL CORP WDC · Entity 1010 GrantDividend Equivalent Rights · Derivative 83.2995 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000213 · edgardoc.xml · derivative · entry 5

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 857.238

Underlying: Common Stock · 83.2995 shares

Expires not disclosed

F3 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded restricted stock units (RSUs) which vest proportionately with the RSUs to which they relate. Each dividend equivalent right represents a contingent right to receive one share of the Issuer's common stock or the cash value thereof.

F3 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded restricted stock units (RSUs) which vest proportionately with the RSUs to which they relate. Each dividend equivalent right represents a contingent right to receive one share of the Issuer's common stock or the cash value thereof.

F3 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded restricted stock units (RSUs) which vest proportionately with the RSUs to which they relate. Each dividend equivalent right represents a contingent right to receive one share of the Issuer's common stock or the cash value thereof.

Read SEC document
September 01, 2026 Filed Sep 2, 2026 22:38 UTC WESTERN DIGITAL CORP WDC · Entity 1010 GiftCommon Stock 112,500 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000192 · primary_doc.xml · nonDerivative · entry 4

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust via Inv Co

Disclosed balance after: 112,500

F2 · kind: The reported transactions represent a transfer of the rights of the Joint Beneficial Owners in the Investment Company to a revocable trust, acting via its trustee (the "Trust"), and the assignment of the rights to the Loan from the Joint Beneficial Owners to the Trust. Trust assets are held through the Investment Company and the shares of the Investment Company are held for the Trust pursuant to a Declaration of Trust. The transfer was made in connection with the Reporting Person's estate planning.

Read SEC document
September 01, 2026 Filed Sep 2, 2026 22:38 UTC WESTERN DIGITAL CORP WDC · Entity 1010 GiftCommon Stock 112,500 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000192 · primary_doc.xml · nonDerivative · entry 3

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By Investment Co

Disclosed balance after: 0

F2 · kind: The reported transactions represent a transfer of the rights of the Joint Beneficial Owners in the Investment Company to a revocable trust, acting via its trustee (the "Trust"), and the assignment of the rights to the Loan from the Joint Beneficial Owners to the Trust. Trust assets are held through the Investment Company and the shares of the Investment Company are held for the Trust pursuant to a Declaration of Trust. The transfer was made in connection with the Reporting Person's estate planning.

Read SEC document
August 31, 2026 Filed Sep 2, 2026 22:38 UTC WESTERN DIGITAL CORP WDC · Entity 1010 OtherCommon Stock 112,500 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000192 · primary_doc.xml · nonDerivative · entry 2

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By Investment Co

Disclosed balance after: 112,500

F1 · kind: The reported transactions represent a transfer of 112,500 shares of Common Stock from the Reporting Person to a Bahamas investment company (the "Investment Company"), of which the Reporting Person and the Reporting Person's spouse (together, the "Joint Beneficial Owners") are the sole beneficial owners of the Investment Company. In connection with the transfer, the Investment Company recorded a shareholder loan liability to the Joint Beneficial Owners in an amount equal to the value of the transferred shares ("Loan"), which is interest-free, repayable on demand, and represents an intra-structure obligation between the Reporting Person and the Investment Company. No cash consideration was paid in connection with the transfer.

Read SEC document
August 31, 2026 Filed Sep 2, 2026 22:38 UTC WESTERN DIGITAL CORP WDC · Entity 1010 OtherCommon Stock 112,500 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000192 · primary_doc.xml · nonDerivative · entry 1

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 266,647

F1 · kind: The reported transactions represent a transfer of 112,500 shares of Common Stock from the Reporting Person to a Bahamas investment company (the "Investment Company"), of which the Reporting Person and the Reporting Person's spouse (together, the "Joint Beneficial Owners") are the sole beneficial owners of the Investment Company. In connection with the transfer, the Investment Company recorded a shareholder loan liability to the Joint Beneficial Owners in an amount equal to the value of the transferred shares ("Loan"), which is interest-free, repayable on demand, and represents an intra-structure obligation between the Reporting Person and the Investment Company. No cash consideration was paid in connection with the transfer.

Read SEC document
August 26, 2026 Filed Aug 28, 2026 00:05 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionDividend Equivalent Rights · Derivative 42.4157 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000187 · edgardoc.xml · derivative · entry 8

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 773.9385

Underlying: Common Stock · 42.4157 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

F1 · derivative.exercise_date: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

F1 · derivative.expiration_date: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

Read SEC document
August 26, 2026 Filed Aug 28, 2026 00:05 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Tax withholdingCommon Stock 3,314 $468.88 $1,553,868.32
Disclosure

SEC source: 0001266824-26-000187 · edgardoc.xml · nonDerivative · entry 5

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 379,147

F3 · shares: Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e).

Read SEC document
August 26, 2026 Filed Aug 28, 2026 00:05 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionCommon Stock 42 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000187 · edgardoc.xml · nonDerivative · entry 4

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 382,461

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

Read SEC document
August 25, 2026 Filed Aug 28, 2026 00:05 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionDividend Equivalent Rights · Derivative 32.0313 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000187 · edgardoc.xml · derivative · entry 7

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 816.3542

Underlying: Common Stock · 32.0313 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

F1 · derivative.exercise_date: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

F1 · derivative.expiration_date: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

Read SEC document
August 25, 2026 Filed Aug 28, 2026 00:05 UTC WESTERN DIGITAL CORP WDC · Entity 1010 GrantCommon Stock 16,548 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000187 · edgardoc.xml · nonDerivative · entry 3

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 382,419

F4 · security: Represents the grant of restricted stock units to the Reporting Person. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Read SEC document
August 25, 2026 Filed Aug 28, 2026 00:05 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Tax withholdingCommon Stock 476 $450.75 $214,557.00
Disclosure

SEC source: 0001266824-26-000187 · edgardoc.xml · nonDerivative · entry 2

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 365,871

F3 · shares: Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e).

Read SEC document
August 25, 2026 Filed Aug 28, 2026 00:05 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionCommon Stock 32 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000187 · edgardoc.xml · nonDerivative · entry 1

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 366,347

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

F2 · balance_after: Since the date of the Reporting Person's last Form 4, the Reporting Person transferred 209,000 shares of the Issuer's common stock to the Reporting Person's personal investment company, organized under the laws of the Bahamas, of which the Reporting Person is the sole shareholder. The transfer constituted a change in form of beneficial ownership exempt from Section 16 pursuant to Rule 16a-13 under the Securities Exchange Act of 1934, as amended.

Read SEC document
August 21, 2026 Filed Aug 24, 2026 22:59 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionDividend Equivalent Rights · Derivative 25.0128 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000173 · edgardoc.xml · derivative · entry 6

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 848.3855

Underlying: Common Stock · 25.0128 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

F1 · derivative.exercise_date: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

F1 · derivative.expiration_date: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

Read SEC document
August 21, 2026 Filed Aug 24, 2026 22:59 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Tax withholdingCommon Stock 545 $459.44 $250,394.80
Disclosure

SEC source: 0001266824-26-000173 · edgardoc.xml · nonDerivative · entry 4

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 575,315

F2 · shares: Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e).

Read SEC document
August 21, 2026 Filed Aug 24, 2026 22:59 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionCommon Stock 25 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000173 · edgardoc.xml · nonDerivative · entry 3

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 575,860

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

Read SEC document
August 20, 2026 Filed Aug 24, 2026 22:59 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionDividend Equivalent Rights · Derivative 13.2646 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000173 · edgardoc.xml · derivative · entry 5

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 873.3983

Underlying: Common Stock · 13.2646 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

F1 · derivative.exercise_date: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

F1 · derivative.expiration_date: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

Read SEC document
August 20, 2026 Filed Aug 24, 2026 22:59 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Tax withholdingCommon Stock 144 $469.05 $67,543.20
Disclosure

SEC source: 0001266824-26-000173 · edgardoc.xml · nonDerivative · entry 2

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 575,835

F2 · shares: Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e).

Read SEC document
August 20, 2026 Filed Aug 24, 2026 22:59 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionCommon Stock 13 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000173 · edgardoc.xml · nonDerivative · entry 1

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 575,979

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

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August 11, 2026 Filed Aug 13, 2026 01:24 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 1,546 $447.18 $691,345.07
Disclosure

SEC source: 0001266824-26-000166 · edgardoc.xml · nonDerivative · entry 7

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 575,966

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 5, 2026.

F8 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $447.00 to a high of $447.88. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

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August 11, 2026 Filed Aug 13, 2026 01:24 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 6,445 $446.38 $2,876,926.83
Disclosure

SEC source: 0001266824-26-000166 · edgardoc.xml · nonDerivative · entry 6

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 577,512

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 5, 2026.

F7 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $446.00 to a high of $446.99. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

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August 11, 2026 Filed Aug 13, 2026 01:24 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 4,822 $445.45 $2,147,963.76
Disclosure

SEC source: 0001266824-26-000166 · edgardoc.xml · nonDerivative · entry 5

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 583,957

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 5, 2026.

F6 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $445.00 to a high of $445.99. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

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August 11, 2026 Filed Aug 13, 2026 01:24 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 1,880 $444.67 $835,988.06
Disclosure

SEC source: 0001266824-26-000166 · edgardoc.xml · nonDerivative · entry 4

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 588,779

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 5, 2026.

F5 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $444.00 to a high of $444.94. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

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August 11, 2026 Filed Aug 13, 2026 01:24 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 1,840 $443.35 $815,757.56
Disclosure

SEC source: 0001266824-26-000166 · edgardoc.xml · nonDerivative · entry 3

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 590,659

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 5, 2026.

F4 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $443.00 to a high of $443.91. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

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August 11, 2026 Filed Aug 13, 2026 01:24 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 989 $442.22 $437,351.13
Disclosure

SEC source: 0001266824-26-000166 · edgardoc.xml · nonDerivative · entry 2

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 592,499

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 5, 2026.

F3 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $441.94 to a high of $442.73. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

Read SEC document
August 11, 2026 Filed Aug 13, 2026 01:24 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 2,478 $441.48 $1,093,996.86
Disclosure

SEC source: 0001266824-26-000166 · edgardoc.xml · nonDerivative · entry 1

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 593,488

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on February 5, 2026.

F2 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $440.77 to a high of $441.66. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

Read SEC document
June 20, 2026 Filed Jun 23, 2026 01:16 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionDividend Equivalent Rights · Derivative 52.1114 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000157 · edgardoc.xml · derivative · entry 4

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 886.6629

Underlying: Common Stock · 52.1114 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

F1 · derivative.exercise_date: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

F1 · derivative.expiration_date: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

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June 20, 2026 Filed Jun 23, 2026 01:16 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Tax withholdingCommon Stock 1,090 $746.23 $813,390.70
Disclosure

SEC source: 0001266824-26-000157 · edgardoc.xml · nonDerivative · entry 2

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 595,966

F2 · shares: Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e).

Read SEC document
June 20, 2026 Filed Jun 23, 2026 01:16 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionCommon Stock 52 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000157 · edgardoc.xml · nonDerivative · entry 1

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 597,056

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

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June 17, 2026 Filed Jun 23, 2026 01:16 UTC WESTERN DIGITAL CORP WDC · Entity 1010 GrantDividend Equivalent Rights · Derivative 56.5009 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000157 · edgardoc.xml · derivative · entry 3

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 938.7743

Underlying: Common Stock · 56.5009 shares

Expires not disclosed

F3 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded restricted stock units (RSUs) which vest proportionately with the RSUs to which they relate. Each dividend equivalent right represents a contingent right to receive one share of the Issuer's common stock or the cash value thereof.

F3 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded restricted stock units (RSUs) which vest proportionately with the RSUs to which they relate. Each dividend equivalent right represents a contingent right to receive one share of the Issuer's common stock or the cash value thereof.

F3 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded restricted stock units (RSUs) which vest proportionately with the RSUs to which they relate. Each dividend equivalent right represents a contingent right to receive one share of the Issuer's common stock or the cash value thereof.

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May 25, 2026 Filed May 27, 2026 22:41 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionDividend Equivalent Rights · Derivative 30.3301 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000106 · edgardoc.xml · derivative · entry 3

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 882.2734

Underlying: Common Stock · 30.3301 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

F1 · derivative.exercise_date: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

F1 · derivative.expiration_date: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

Read SEC document
May 25, 2026 Filed May 27, 2026 22:41 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Tax withholdingCommon Stock 479 $484.28 $231,970.12
Disclosure

SEC source: 0001266824-26-000106 · edgardoc.xml · nonDerivative · entry 2

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 597,004

F2 · shares: Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e).

Read SEC document
May 25, 2026 Filed May 27, 2026 22:41 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionCommon Stock 30 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000106 · edgardoc.xml · nonDerivative · entry 1

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 597,483

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

Read SEC document
May 21, 2026 Filed May 22, 2026 23:23 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionDividend Equivalent Rights · Derivative 23.6805 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000098 · edgardoc.xml · derivative · entry 6

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 912.6035

Underlying: Common Stock · 23.6805 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

F1 · derivative.exercise_date: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

F1 · derivative.expiration_date: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

Read SEC document
May 21, 2026 Filed May 22, 2026 23:23 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Tax withholdingCommon Stock 587 $486.46 $285,552.02
Disclosure

SEC source: 0001266824-26-000098 · edgardoc.xml · nonDerivative · entry 4

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 597,453

F2 · shares: Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e).

Read SEC document
May 21, 2026 Filed May 22, 2026 23:23 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionCommon Stock 23 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000098 · edgardoc.xml · nonDerivative · entry 3

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 598,040

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

Read SEC document
May 20, 2026 Filed May 22, 2026 23:23 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionDividend Equivalent Rights · Derivative 12.5601 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000098 · edgardoc.xml · derivative · entry 5

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 936.284

Underlying: Common Stock · 12.5601 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

F1 · derivative.exercise_date: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

F1 · derivative.expiration_date: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

Read SEC document
May 20, 2026 Filed May 22, 2026 23:23 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Tax withholdingCommon Stock 145 $459.62 $66,644.90
Disclosure

SEC source: 0001266824-26-000098 · edgardoc.xml · nonDerivative · entry 2

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 598,017

F2 · shares: Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e).

Read SEC document
May 20, 2026 Filed May 22, 2026 23:23 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionCommon Stock 12 $0.00 $0.00
Disclosure

SEC source: 0001266824-26-000098 · edgardoc.xml · nonDerivative · entry 1

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 598,162

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: The dividend equivalent rights were converted into, and paid in the form of, shares of the Issuer's common stock on a one-for-one basis in connection with the vesting of restricted stock units to which the dividend equivalent rights relate. A cash amount was also paid to the holder to settle a fractional dividend equivalent right.

Read SEC document
May 01, 2026 Filed May 5, 2026 22:14 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 435 $415.02 $180,531.83
Disclosure

SEC source: 0001266824-26-000083 · edgardoc.xml · nonDerivative · entry 9

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 598,150

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 12, 2025.

F10 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $414.6700 to a high of $415.4200. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

Read SEC document
May 01, 2026 Filed May 5, 2026 22:14 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 7,355 $413.92 $3,044,375.72
Disclosure

SEC source: 0001266824-26-000083 · edgardoc.xml · nonDerivative · entry 8

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 598,585

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 12, 2025.

F9 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $413.4800 to a high of $414.2000. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

Read SEC document
May 01, 2026 Filed May 5, 2026 22:14 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 5,711 $413.12 $2,359,341.46
Disclosure

SEC source: 0001266824-26-000083 · edgardoc.xml · nonDerivative · entry 7

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 605,940

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 12, 2025.

F8 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $412.4800 to a high of $413.4750. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

Read SEC document
May 01, 2026 Filed May 5, 2026 22:14 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 680 $411.87 $280,068.40
Disclosure

SEC source: 0001266824-26-000083 · edgardoc.xml · nonDerivative · entry 6

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 611,651

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 12, 2025.

F7 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $411.3750 to a high of $412.3500. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

Read SEC document
May 01, 2026 Filed May 5, 2026 22:14 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 920 $410.76 $377,897.64
Disclosure

SEC source: 0001266824-26-000083 · edgardoc.xml · nonDerivative · entry 5

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 612,331

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 12, 2025.

F6 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $410.1600 to a high of $411.1500. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

Read SEC document
May 01, 2026 Filed May 5, 2026 22:14 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 546 $409.63 $223,657.05
Disclosure

SEC source: 0001266824-26-000083 · edgardoc.xml · nonDerivative · entry 4

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 613,251

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 12, 2025.

F5 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $409.0000 to a high of $409.9900. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

Read SEC document
May 01, 2026 Filed May 5, 2026 22:14 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 584 $408.23 $238,407.96
Disclosure

SEC source: 0001266824-26-000083 · edgardoc.xml · nonDerivative · entry 3

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 613,797

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 12, 2025.

F4 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $407.8150 to a high of $408.5900. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

Read SEC document
May 01, 2026 Filed May 5, 2026 22:14 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 512 $407.32 $208,547.48
Disclosure

SEC source: 0001266824-26-000083 · edgardoc.xml · nonDerivative · entry 2

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 614,381

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 12, 2025.

F3 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $406.8100 to a high of $407.5300. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

Read SEC document
May 01, 2026 Filed May 5, 2026 22:14 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 3,257 $406.52 $1,324,036.94
Disclosure

SEC source: 0001266824-26-000083 · edgardoc.xml · nonDerivative · entry 1

Tan Irving · CIK 0001729518 · Director · Chief Executive Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 614,893

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 12, 2025.

F2 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $405.6950 to a high of $406.6800. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.