{"transactions":[{"id":4623764,"issuer":{"id":1010,"kind":"organization","name":"WESTERN DIGITAL CORP","symbol":"WDC"},"owners":[{"id":11306,"kind":"person","name":"MASSENGILL MATTHEW E","position":1,"cik":"0001232826","reported_name":"MASSENGILL MATTHEW E","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Dividend Equivalent Rights","published_at":"2026-09-21T22:34:58.000Z","date":"2026-09-17","kind":"grant","planned":false,"acquired":true,"shares":10.2654,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"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."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"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."}],"balance_after":121.1113,"derivative":{"underlying":"Common Stock","underlying_shares":10.2654},"source":{"system":"sec-edgar","filing":"0001266824-26-000208","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1232826/000126682426000208/edgardoc.xml","form_type":"4"}},{"id":308026,"issuer":{"id":1010,"kind":"organization","name":"WESTERN DIGITAL CORP","symbol":"WDC"},"owners":[{"id":11306,"kind":"person","name":"MASSENGILL MATTHEW E","position":1,"cik":"0001232826","reported_name":"MASSENGILL MATTHEW E","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Dividend Equivalent Rights","published_at":"2026-06-23T01:16:12.000Z","date":"2026-06-17","kind":"grant","planned":false,"acquired":true,"shares":6.1088,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"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."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"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."}],"balance_after":110.8459,"derivative":{"underlying":"Common Stock","underlying_shares":6.1088},"source":{"system":"sec-edgar","filing":"0001266824-26-000152","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/106040/000126682426000152/edgardoc.xml","form_type":"4"}},{"id":311341,"issuer":{"id":1010,"kind":"organization","name":"WESTERN DIGITAL CORP","symbol":"WDC"},"owners":[{"id":11306,"kind":"person","name":"MASSENGILL MATTHEW E","position":1,"cik":"0001232826","reported_name":"MASSENGILL MATTHEW E","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Dividend Equivalent Rights","published_at":"2026-03-19T22:42:34.000Z","date":"2026-03-18","kind":"grant","planned":false,"acquired":true,"shares":11.8849,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"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."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"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."}],"balance_after":104.7371,"derivative":{"underlying":"Common Stock","underlying_shares":11.8849},"source":{"system":"sec-edgar","filing":"0001266824-26-000064","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/106040/000126682426000064/edgardoc.xml","form_type":"4"}},{"id":314128,"issuer":{"id":1010,"kind":"organization","name":"WESTERN DIGITAL CORP","symbol":"WDC"},"owners":[{"id":11306,"kind":"person","name":"MASSENGILL MATTHEW E","position":1,"cik":"0001232826","reported_name":"MASSENGILL MATTHEW E","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-06T23:09:23.000Z","date":"2026-02-05","kind":"sale","planned":true,"acquired":false,"shares":400,"price":268.055,"value":107222.0,"ownership":{"direct":false,"nature":"By Family Trust"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 6, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F12","text":"Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $267.58 to a high of $268.53. 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."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001266824-26-000008","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/106040/000126682426000008/edgardoc.xml","form_type":"4"}},{"id":314127,"issuer":{"id":1010,"kind":"organization","name":"WESTERN DIGITAL CORP","symbol":"WDC"},"owners":[{"id":11306,"kind":"person","name":"MASSENGILL MATTHEW E","position":1,"cik":"0001232826","reported_name":"MASSENGILL MATTHEW E","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-06T23:09:23.000Z","date":"2026-02-05","kind":"sale","planned":true,"acquired":false,"shares":916,"price":265.9172,"value":243580.1552,"ownership":{"direct":false,"nature":"By Family Trust"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 6, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F11","text":"Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $265.57 to a high of $266.27. 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."}],"balance_after":400,"source":{"system":"sec-edgar","filing":"0001266824-26-000008","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/106040/000126682426000008/edgardoc.xml","form_type":"4"}},{"id":314126,"issuer":{"id":1010,"kind":"organization","name":"WESTERN DIGITAL CORP","symbol":"WDC"},"owners":[{"id":11306,"kind":"person","name":"MASSENGILL MATTHEW E","position":1,"cik":"0001232826","reported_name":"MASSENGILL MATTHEW E","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-06T23:09:23.000Z","date":"2026-02-05","kind":"sale","planned":true,"acquired":false,"shares":2200,"price":264.9908,"value":582979.76,"ownership":{"direct":false,"nature":"By Family Trust"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 6, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F10","text":"Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $264.54 to a high of $265.51. 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."}],"balance_after":1316,"source":{"system":"sec-edgar","filing":"0001266824-26-000008","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/106040/000126682426000008/edgardoc.xml","form_type":"4"}},{"id":314125,"issuer":{"id":1010,"kind":"organization","name":"WESTERN DIGITAL CORP","symbol":"WDC"},"owners":[{"id":11306,"kind":"person","name":"MASSENGILL MATTHEW E","position":1,"cik":"0001232826","reported_name":"MASSENGILL MATTHEW E","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-06T23:09:23.000Z","date":"2026-02-05","kind":"sale","planned":true,"acquired":false,"shares":2600,"price":264.0112,"value":686429.12,"ownership":{"direct":false,"nature":"By Family Trust"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 6, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F9","text":"Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $263.40 to a high of $264.38. 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."}],"balance_after":3516,"source":{"system":"sec-edgar","filing":"0001266824-26-000008","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/106040/000126682426000008/edgardoc.xml","form_type":"4"}},{"id":314124,"issuer":{"id":1010,"kind":"organization","name":"WESTERN DIGITAL CORP","symbol":"WDC"},"owners":[{"id":11306,"kind":"person","name":"MASSENGILL MATTHEW E","position":1,"cik":"0001232826","reported_name":"MASSENGILL MATTHEW E","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-06T23:09:23.000Z","date":"2026-02-05","kind":"sale","planned":true,"acquired":false,"shares":2300,"price":262.7678,"value":604365.94,"ownership":{"direct":false,"nature":"By Family Trust"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 6, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F8","text":"Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $262.21 to a high of $263.14. 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."}],"balance_after":6116,"source":{"system":"sec-edgar","filing":"0001266824-26-000008","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/106040/000126682426000008/edgardoc.xml","form_type":"4"}},{"id":314123,"issuer":{"id":1010,"kind":"organization","name":"WESTERN DIGITAL CORP","symbol":"WDC"},"owners":[{"id":11306,"kind":"person","name":"MASSENGILL MATTHEW E","position":1,"cik":"0001232826","reported_name":"MASSENGILL MATTHEW E","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-06T23:09:23.000Z","date":"2026-02-05","kind":"sale","planned":true,"acquired":false,"shares":3597,"price":261.7077,"value":941362.5969,"ownership":{"direct":false,"nature":"By Family Trust"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 6, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $261.19 to a high of $262.18. 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."}],"balance_after":8416,"source":{"system":"sec-edgar","filing":"0001266824-26-000008","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/106040/000126682426000008/edgardoc.xml","form_type":"4"}},{"id":314122,"issuer":{"id":1010,"kind":"organization","name":"WESTERN DIGITAL CORP","symbol":"WDC"},"owners":[{"id":11306,"kind":"person","name":"MASSENGILL MATTHEW E","position":1,"cik":"0001232826","reported_name":"MASSENGILL MATTHEW E","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-06T23:09:23.000Z","date":"2026-02-05","kind":"sale","planned":true,"acquired":false,"shares":5987,"price":260.5707,"value":1560036.7809,"ownership":{"direct":false,"nature":"By Family Trust"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 6, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $260.15 to a high of $261.05. 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."}],"balance_after":12013,"source":{"system":"sec-edgar","filing":"0001266824-26-000008","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/106040/000126682426000008/edgardoc.xml","form_type":"4"}},{"id":314121,"issuer":{"id":1010,"kind":"organization","name":"WESTERN DIGITAL CORP","symbol":"WDC"},"owners":[{"id":11306,"kind":"person","name":"MASSENGILL MATTHEW E","position":1,"cik":"0001232826","reported_name":"MASSENGILL MATTHEW E","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-06T23:09:23.000Z","date":"2026-02-05","kind":"sale","planned":true,"acquired":false,"shares":4915,"price":259.5923,"value":1275896.1545,"ownership":{"direct":false,"nature":"By Family Trust"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 6, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $259.15 to a high of $260.12. 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."}],"balance_after":18000,"source":{"system":"sec-edgar","filing":"0001266824-26-000008","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/106040/000126682426000008/edgardoc.xml","form_type":"4"}},{"id":314120,"issuer":{"id":1010,"kind":"organization","name":"WESTERN DIGITAL CORP","symbol":"WDC"},"owners":[{"id":11306,"kind":"person","name":"MASSENGILL MATTHEW E","position":1,"cik":"0001232826","reported_name":"MASSENGILL MATTHEW E","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-06T23:09:23.000Z","date":"2026-02-05","kind":"sale","planned":true,"acquired":false,"shares":7000,"price":258.6719,"value":1810703.3,"ownership":{"direct":false,"nature":"By Family Trust"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 6, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $258.14 to a high of $259.13. 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."}],"balance_after":22915,"source":{"system":"sec-edgar","filing":"0001266824-26-000008","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/106040/000126682426000008/edgardoc.xml","form_type":"4"}},{"id":314119,"issuer":{"id":1010,"kind":"organization","name":"WESTERN DIGITAL CORP","symbol":"WDC"},"owners":[{"id":11306,"kind":"person","name":"MASSENGILL MATTHEW E","position":1,"cik":"0001232826","reported_name":"MASSENGILL MATTHEW E","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-06T23:09:23.000Z","date":"2026-02-05","kind":"sale","planned":true,"acquired":false,"shares":4411,"price":257.6851,"value":1136648.9761,"ownership":{"direct":false,"nature":"By Family Trust"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 6, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $257.14 to a high of $258.13. 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."}],"balance_after":29915,"source":{"system":"sec-edgar","filing":"0001266824-26-000008","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/106040/000126682426000008/edgardoc.xml","form_type":"4"}},{"id":314118,"issuer":{"id":1010,"kind":"organization","name":"WESTERN DIGITAL CORP","symbol":"WDC"},"owners":[{"id":11306,"kind":"person","name":"MASSENGILL MATTHEW E","position":1,"cik":"0001232826","reported_name":"MASSENGILL MATTHEW E","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-06T23:09:23.000Z","date":"2026-02-05","kind":"sale","planned":true,"acquired":false,"shares":2600,"price":256.6312,"value":667241.12,"ownership":{"direct":false,"nature":"By Family Trust"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 6, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $256.12 to a high of $257.09. 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."}],"balance_after":34326,"source":{"system":"sec-edgar","filing":"0001266824-26-000008","document":"edgardoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/106040/000126682426000008/edgardoc.xml","form_type":"4"}},{"id":315833,"issuer":{"id":1010,"kind":"organization","name":"WESTERN DIGITAL CORP","symbol":"WDC"},"owners":[{"id":11306,"kind":"person","name":"MASSENGILL MATTHEW E","position":1,"cik":"0001232826","reported_name":"MASSENGILL MATTHEW E","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Dividend Equivalent Rights","published_at":"2025-12-22T21:51:08.000Z","date":"2025-12-18","kind":"grant","planned":false,"acquired":true,"shares":20.691,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"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."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"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."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"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."}],"balance_after":92.8522,"derivative":{"underlying":"Common Stock","underlying_shares":20.691},"source":{"system":"sec-edgar","filing":"0001266824-25-000287","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/106040/000126682425000287/edgardoc.xml","form_type":"4"}},{"id":316777,"issuer":{"id":1010,"kind":"organization","name":"WESTERN DIGITAL CORP","symbol":"WDC"},"owners":[{"id":11306,"kind":"person","name":"MASSENGILL MATTHEW E","position":1,"cik":"0001232826","reported_name":"MASSENGILL MATTHEW E","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2025-11-21T22:31:55.000Z","date":"2025-11-20","kind":"grant","planned":false,"acquired":true,"shares":1585,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 8,508 additional stock units acquired by the Reporting Person in connection with the Issuer's spin-off (the \"Spin-Off\") of a then-wholly owned subsidiary of the Issuer on February 21, 2025. 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A cash amount equal to $40.98 was also paid to the holder to settle a fractional dividend equivalent of 0.4197."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The dividend equivalents 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 equivalents relate.  A cash amount equal to $40.98 was also paid to the holder to settle a fractional dividend equivalent of 0.4197."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The dividend equivalents 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 equivalents relate.  A cash amount equal to $40.98 was also paid to the holder to settle a fractional dividend equivalent of 0.4197."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":200.4197},"source":{"system":"sec-edgar","filing":"0001266824-14-000272","document":"edgardoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/106040/000126682414000272/edgardoc.xml","form_type":"4"}},{"id":459579,"issuer":{"id":1010,"kind":"organization","name":"WESTERN DIGITAL CORP","symbol":"WDC"},"owners":[{"id":11306,"kind":"person","name":"MASSENGILL MATTHEW E","position":1,"cik":"0001232826","reported_name":"MASSENGILL MATTHEW E","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2014-11-13T00:47:47.000Z","date":"2014-11-11","kind":"sale","acquired":false,"shares":2639,"price":97.1802,"value":256458.5478,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 6, 2014."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Represents the weighted average sale price per share. 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A cash amount equal to $18.21 was also paid to the holder to settle a fractional dividend equivalent of 0.1821."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The dividend equivalents 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 equivalents relate. A cash amount equal to $18.21 was also paid to the holder to settle a fractional dividend equivalent of 0.1821."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The dividend equivalents 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 equivalents relate. 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