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Nasdaq · USD

WDC

WESTERN DIGITAL CORP

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1010
SEC CIK
0000106040
Parsed reports
1,958

Last 12 months

Inside the activity.

0 purchase rows · 224 sale rows

Disclosed non-derivative P/S rows, by transaction month. Includes amendments and private transactions.
Monthly counts
MonthPurchasesSales
Nov 2025019
Dec 2025013
Jan 202601
Feb 2026044
Mar 2026019
Apr 202601
May 2026032
Jun 2026046
Jul 2026033
Aug 2026013
Sep 202603
Oct 202600

Latest available

Insider transactions

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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 dateOwner / reported roleActivity / securityShares / unitsReported priceReported valueDetails
May 16, 2013 Filed May 20, 2013 22:51 UTC
CORDANO MICHAEL DPresident, HGST Subsidiary
Tax withholdingCommon Stock 3,040 $59.05 $179,512.00
Disclosure

SEC source: 0001266824-13-000071 · edgardoc.xml · nonDerivative · entry 2

CORDANO MICHAEL D · CIK 0001201490 · President, HGST Subsidiary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 60,075

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 16, 2013 Filed May 20, 2013 22:51 UTC
CORDANO MICHAEL DPresident, HGST Subsidiary
Exercise / conversionCommon Stock 137 $0.00 $0.00
Disclosure

SEC source: 0001266824-13-000071 · edgardoc.xml · nonDerivative · entry 1

CORDANO MICHAEL D · CIK 0001201490 · President, HGST Subsidiary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 63,115

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 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 $14.53 was also paid to the holder to settle a fractional dividend equivalent of 0.2461.

Read SEC document
May 16, 2013 Filed May 20, 2013 22:51 UTC Exercise / conversionDividend Equivalent Rights · Derivative 100.9311 $0.00 $0.00
Disclosure

SEC source: 0001266824-13-000072 · edgardoc.xml · derivative · entry 3

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,162.0455

Underlying: Common Stock · 100.9311 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 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 $54.98 was also paid to the holder to settle a fractional dividend equivalent of 0.9331.

F1 · derivative.exercise_date: 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 $54.98 was also paid to the holder to settle a fractional dividend equivalent of 0.9331.

F1 · derivative.expiration_date: 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 $54.98 was also paid to the holder to settle a fractional dividend equivalent of 0.9331.

Read SEC document
May 16, 2013 Filed May 20, 2013 22:51 UTC Tax withholdingCommon Stock 2,153 $59.05 $127,134.65
Disclosure

SEC source: 0001266824-13-000072 · edgardoc.xml · nonDerivative · entry 2

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 56,172

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 16, 2013 Filed May 20, 2013 22:51 UTC Exercise / conversionCommon Stock 100 $0.00 $0.00
Disclosure

SEC source: 0001266824-13-000072 · edgardoc.xml · nonDerivative · entry 1

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 58,325

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 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 $54.98 was also paid to the holder to settle a fractional dividend equivalent of 0.9331.

Read SEC document
May 15, 2013 Filed May 16, 2013 21:59 UTC SaleCommon Stock 5,000 $59.52 $297,619.00
Disclosure

SEC source: 0001266824-13-000067 · edgardoc.xml · nonDerivative · entry 1

DENERO HENRY T · CIK 0001227538 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 39,660

F1 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $59.515 to a high of $59.53. 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.

Read SEC document
May 14, 2013 Filed May 16, 2013 21:59 UTC Exercise / conversionNon-Qualified Stock Option (right to buy) · Derivative 9,185 $0.00 Strike: $19.09 $0.00
Disclosure

SEC source: 0001266824-13-000068 · edgardoc.xml · derivative · entry 3

PARDUN THOMAS E · CIK 0001232833 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 9,185 shares

Expires 2017-02-06

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.

F2 · derivative.exercise_date: The option vested 25% on the first anniversary of the grant date and 6.25% at the end of each three-month period thereafter.

Read SEC document
May 14, 2013 Filed May 16, 2013 21:59 UTC SaleCommon Stock 9,185 $59.00 $541,929.70
Disclosure

SEC source: 0001266824-13-000068 · edgardoc.xml · nonDerivative · entry 2

PARDUN THOMAS E · CIK 0001232833 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,364

F1 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $59.00 to a high of $59.02. 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 14, 2013 Filed May 16, 2013 21:59 UTC Exercise / conversionCommon Stock 9,185 $19.09 $175,341.65
Disclosure

SEC source: 0001266824-13-000068 · edgardoc.xml · nonDerivative · entry 1

PARDUN THOMAS E · CIK 0001232833 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,549

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.

Read SEC document
May 09, 2013 Filed May 10, 2013 22:21 UTC Exercise / conversionNon-Qualified Stock Option (right to buy) · Derivative 7,364 $0.00 Strike: $27.64 $0.00
Disclosure

SEC source: 0001266824-13-000064 · edgardoc.xml · derivative · entry 5

LAMBERT MICHAEL D · CIK 0001077820 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,364 shares

Expires 2014-11-06

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.

F2 · derivative.exercise_date: The option vested 25% on the first anniversary of the grant date and 6.25% at the end of each three-month period thereafter.

Read SEC document
May 09, 2013 Filed May 10, 2013 22:21 UTC Exercise / conversionNon-Qualified Stock Option (right to buy) · Derivative 16,743 $0.00 Strike: $15.34 $0.00
Disclosure

SEC source: 0001266824-13-000064 · edgardoc.xml · derivative · entry 4

LAMBERT MICHAEL D · CIK 0001077820 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 16,743 shares

Expires 2015-11-06

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.

F2 · derivative.exercise_date: The option vested 25% on the first anniversary of the grant date and 6.25% at the end of each three-month period thereafter.

Read SEC document
May 09, 2013 Filed May 10, 2013 22:21 UTC SaleCommon Stock 24,107 $57.34 $1,382,225.47
Disclosure

SEC source: 0001266824-13-000064 · edgardoc.xml · nonDerivative · entry 3

LAMBERT MICHAEL D · CIK 0001077820 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,093

F1 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $57.28 to a high of $57.52. 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 09, 2013 Filed May 10, 2013 22:21 UTC Exercise / conversionCommon Stock 7,364 $27.64 $203,540.96
Disclosure

SEC source: 0001266824-13-000064 · edgardoc.xml · nonDerivative · entry 2

LAMBERT MICHAEL D · CIK 0001077820 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 49,200

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.

Read SEC document
May 09, 2013 Filed May 10, 2013 22:21 UTC Exercise / conversionCommon Stock 16,743 $15.34 $256,837.62
Disclosure

SEC source: 0001266824-13-000064 · edgardoc.xml · nonDerivative · entry 1

LAMBERT MICHAEL D · CIK 0001077820 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 41,836

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.

Read SEC document
May 06, 2013 Filed May 6, 2013 23:23 UTC
MILLIGAN STEPHEN DDirector · President & CEO
SaleCommon Stock 2,534 $57.36 $145,350.24
Disclosure

SEC source: 0001266824-13-000061 · edgardoc.xml · nonDerivative · entry 1

MILLIGAN STEPHEN D · CIK 0001277246 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 85,631

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 March 20, 2013.

Read SEC document
May 05, 2013 Filed May 6, 2013 23:23 UTC
LEYDEN TIMOTHY MPresident, WD Subsidiary
Exercise / conversionDividend Equivalent Rights · Derivative 425.6466 $0.00 $0.00
Disclosure

SEC source: 0001266824-13-000060 · edgardoc.xml · derivative · entry 6

LEYDEN TIMOTHY M · CIK 0001398362 · President, WD Subsidiary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,721.507

Underlying: Common Stock · 425.6466 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.

F3 · derivative.exercise_price: 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 $36.95 was also paid to the holder to settle a fractional dividend equivalent of 0.6466.

F3 · derivative.exercise_date: 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 $36.95 was also paid to the holder to settle a fractional dividend equivalent of 0.6466.

F3 · derivative.expiration_date: 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 $36.95 was also paid to the holder to settle a fractional dividend equivalent of 0.6466.

Read SEC document
May 05, 2013 Filed May 6, 2013 23:23 UTC
LEYDEN TIMOTHY MPresident, WD Subsidiary
Tax withholdingCommon Stock 12,612 $57.15 $720,775.80
Disclosure

SEC source: 0001266824-13-000060 · edgardoc.xml · nonDerivative · entry 5

LEYDEN TIMOTHY M · CIK 0001398362 · President, WD Subsidiary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 194,807

F4 · 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 05, 2013 Filed May 6, 2013 23:23 UTC
LEYDEN TIMOTHY MPresident, WD Subsidiary
Exercise / conversionCommon Stock 425 $0.00 $0.00
Disclosure

SEC source: 0001266824-13-000060 · edgardoc.xml · nonDerivative · entry 4

LEYDEN TIMOTHY M · CIK 0001398362 · President, WD Subsidiary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 207,419

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.

F3 · shares: 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 $36.95 was also paid to the holder to settle a fractional dividend equivalent of 0.6466.

Read SEC document
May 05, 2013 Filed May 6, 2013 23:23 UTC Exercise / conversionDividend Equivalent Rights · Derivative 99.4972 $0.00 $0.00
Disclosure

SEC source: 0001266824-13-000062 · edgardoc.xml · derivative · entry 3

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,262.9766

Underlying: Common Stock · 99.4972 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 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 $28.41 was also paid to the holder to settle a fractional dividend equivalent of 0.4972.

F1 · derivative.exercise_date: 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 $28.41 was also paid to the holder to settle a fractional dividend equivalent of 0.4972.

F1 · derivative.expiration_date: 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 $28.41 was also paid to the holder to settle a fractional dividend equivalent of 0.4972.

Read SEC document
May 05, 2013 Filed May 6, 2013 23:23 UTC Tax withholdingCommon Stock 2,122 $57.15 $121,272.30
Disclosure

SEC source: 0001266824-13-000062 · edgardoc.xml · nonDerivative · entry 2

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 58,225

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 05, 2013 Filed May 6, 2013 23:23 UTC Exercise / conversionCommon Stock 99 $0.00 $0.00
Disclosure

SEC source: 0001266824-13-000062 · edgardoc.xml · nonDerivative · entry 1

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 60,347

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 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 $28.41 was also paid to the holder to settle a fractional dividend equivalent of 0.4972.

Read SEC document
May 03, 2013 Filed May 6, 2013 23:22 UTC Exercise / conversionNon-Qualified Stock Option (right to buy) · Derivative 3,607 $0.00 Strike: $25.79 $0.00
Disclosure

SEC source: 0001266824-13-000059 · edgardoc.xml · derivative · entry 5

COTE KATHLEEN A · CIK 0001181540 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,935

Underlying: Common Stock · 3,607 shares

Expires 2018-11-10

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.

F3 · derivative.exercise_date: The option vested 25% one year from the grant date of 11/10/2011, and an additional 6.25% vested at the end of the three-month period on 2/10/2013. The remaining shares subject to the option will vest at 6.25% at the end of each three-month period until fully vested on 11/10/2015.

Read SEC document
May 03, 2013 Filed May 6, 2013 23:22 UTC Exercise / conversionNon-Qualified Stock Option (right to buy) · Derivative 9,185 $0.00 Strike: $19.09 $0.00
Disclosure

SEC source: 0001266824-13-000059 · edgardoc.xml · derivative · entry 4

COTE KATHLEEN A · CIK 0001181540 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 9,185 shares

Expires 2017-02-06

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.

F2 · derivative.exercise_date: The option vested 25% on the first anniversary of the grant date and 6.25% at the end of each three-month period thereafter.

Read SEC document
May 03, 2013 Filed May 6, 2013 23:22 UTC SaleCommon Stock 12,792 $57.47 $735,218.92
Disclosure

SEC source: 0001266824-13-000059 · edgardoc.xml · nonDerivative · entry 3

COTE KATHLEEN A · CIK 0001181540 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,093

F1 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $57.3507 to a high of $57.6007. 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 03, 2013 Filed May 6, 2013 23:22 UTC Exercise / conversionCommon Stock 3,607 $25.79 $93,024.53
Disclosure

SEC source: 0001266824-13-000059 · edgardoc.xml · nonDerivative · entry 2

COTE KATHLEEN A · CIK 0001181540 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,885

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.

Read SEC document
May 03, 2013 Filed May 6, 2013 23:22 UTC Exercise / conversionCommon Stock 9,185 $19.09 $175,341.65
Disclosure

SEC source: 0001266824-13-000059 · edgardoc.xml · nonDerivative · entry 1

COTE KATHLEEN A · CIK 0001181540 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 24,278

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.

Read SEC document
May 02, 2013 Filed May 6, 2013 23:23 UTC
LEYDEN TIMOTHY MPresident, WD Subsidiary
Exercise / conversionEmployee Stock Option (right to buy) · Derivative 29,600 $0.00 Strike: $23.46 $0.00
Disclosure

SEC source: 0001266824-13-000060 · edgardoc.xml · derivative · entry 8

LEYDEN TIMOTHY M · CIK 0001398362 · President, WD Subsidiary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 29,600 shares

Expires 2014-09-12

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.

F5 · derivative.exercise_date: The option vested 25% on the first anniversary of the grant date and 6.25% at the end of each three-month period thereafter.

Read SEC document
May 02, 2013 Filed May 6, 2013 23:23 UTC
LEYDEN TIMOTHY MPresident, WD Subsidiary
Exercise / conversionEmployee Stock Option (right to buy) · Derivative 113,404 $0.00 Strike: $19.89 $0.00
Disclosure

SEC source: 0001266824-13-000060 · edgardoc.xml · derivative · entry 7

LEYDEN TIMOTHY M · CIK 0001398362 · President, WD Subsidiary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 36,596

Underlying: Common Stock · 113,404 shares

Expires 2014-06-12

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.

F5 · derivative.exercise_date: The option vested 25% on the first anniversary of the grant date and 6.25% at the end of each three-month period thereafter.

Read SEC document
May 02, 2013 Filed May 6, 2013 23:23 UTC
LEYDEN TIMOTHY MPresident, WD Subsidiary
SaleCommon Stock 143,004 $56.21 $8,037,582.72
Disclosure

SEC source: 0001266824-13-000060 · edgardoc.xml · nonDerivative · entry 3

LEYDEN TIMOTHY M · CIK 0001398362 · President, WD Subsidiary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 206,994

F1 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $56.06 to a high of $56.36. 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.

F2 · balance_after: Includes 632 shares acquired under the issuer's Employee Stock Purchase Plan on November 30, 2012.

Read SEC document
May 02, 2013 Filed May 6, 2013 23:23 UTC
LEYDEN TIMOTHY MPresident, WD Subsidiary
Exercise / conversionCommon Stock 29,600 $23.46 $694,416.00
Disclosure

SEC source: 0001266824-13-000060 · edgardoc.xml · nonDerivative · entry 2

LEYDEN TIMOTHY M · CIK 0001398362 · President, WD Subsidiary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 349,998

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.

Read SEC document
May 02, 2013 Filed May 6, 2013 23:23 UTC
LEYDEN TIMOTHY MPresident, WD Subsidiary
Exercise / conversionCommon Stock 113,404 $19.89 $2,255,605.56
Disclosure

SEC source: 0001266824-13-000060 · edgardoc.xml · nonDerivative · entry 1

LEYDEN TIMOTHY M · CIK 0001398362 · President, WD Subsidiary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 320,398

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.

Read SEC document
April 30, 2013 Filed May 2, 2013 21:39 UTC SaleCommon Stock 3,750 $55.00 $206,250.00
Disclosure

SEC source: 0001266824-13-000054 · edgardoc.xml · nonDerivative · entry 1

KIMSEY WILLIAM L · CIK 0001232832 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,250

Read SEC document
April 15, 2013 Filed Apr 17, 2013 00:12 UTC
CORDANO MICHAEL DPresident, HGST Subsidiary
GrantDividend Equivalent Rights · Derivative 551.7402 $0.00 $0.00
Disclosure

SEC source: 0001266824-13-000040 · edgardoc.xml · derivative · entry 1

CORDANO MICHAEL D · CIK 0001201490 · President, HGST Subsidiary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,997.8701

Underlying: Common Stock · 551.7402 shares

Expires not disclosed

F1 · 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.

F1 · 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.

F1 · 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
April 15, 2013 Filed Apr 17, 2013 00:12 UTC GrantDividend Equivalent Rights · Derivative 74.4889 $0.00 $0.00
Disclosure

SEC source: 0001266824-13-000041 · edgardoc.xml · derivative · entry 1

COTE KATHLEEN A · CIK 0001181540 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 224.8792

Underlying: Common Stock · 74.4889 shares

Expires not disclosed

F1 · 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.

F1 · 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.

F1 · 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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April 15, 2013 Filed Apr 17, 2013 00:12 UTC GrantDividend Equivalent Rights · Derivative 98.6797 $0.00 $0.00
Disclosure

SEC source: 0001266824-13-000042 · edgardoc.xml · derivative · entry 1

DENERO HENRY T · CIK 0001227538 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 312.4748

Underlying: Common Stock · 98.6797 shares

Expires not disclosed

F1 · 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.

F1 · 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.

F1 · 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
April 15, 2013 Filed Apr 17, 2013 00:12 UTC GrantDividend Equivalent Rights · Derivative 74.4889 $0.00 $0.00
Disclosure

SEC source: 0001266824-13-000043 · edgardoc.xml · derivative · entry 1

KIMSEY WILLIAM L · CIK 0001232832 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 224.8792

Underlying: Common Stock · 74.4889 shares

Expires not disclosed

F1 · 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.

F1 · 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.

F1 · 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
April 15, 2013 Filed Apr 17, 2013 00:12 UTC GrantDividend Equivalent Rights · Derivative 74.4889 $0.00 $0.00
Disclosure

SEC source: 0001266824-13-000044 · edgardoc.xml · derivative · entry 1

LAMBERT MICHAEL D · CIK 0001077820 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 224.8792

Underlying: Common Stock · 74.4889 shares

Expires not disclosed

F1 · 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.

F1 · 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.

F1 · 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
April 15, 2013 Filed Apr 17, 2013 00:12 UTC
Lauer Len JDirector
GrantDividend Equivalent Rights · Derivative 77.6519 $0.00 $0.00
Disclosure

SEC source: 0001266824-13-000045 · edgardoc.xml · derivative · entry 1

Lauer Len J · CIK 0001202231 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 236.3327

Underlying: Common Stock · 77.6519 shares

Expires not disclosed

F1 · 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.

F1 · 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.

F1 · 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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April 15, 2013 Filed Apr 17, 2013 00:13 UTC
LEYDEN TIMOTHY MPresident, WD Subsidiary
GrantDividend Equivalent Rights · Derivative 869.1311 $0.00 $0.00
Disclosure

SEC source: 0001266824-13-000046 · edgardoc.xml · derivative · entry 1

LEYDEN TIMOTHY M · CIK 0001398362 · President, WD Subsidiary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,147.1536

Underlying: Common Stock · 869.1311 shares

Expires not disclosed

F1 · 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.

F1 · 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.

F1 · 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
April 15, 2013 Filed Apr 17, 2013 00:13 UTC GrantDividend Equivalent Rights · Derivative 74.4889 $0.00 $0.00
Disclosure

SEC source: 0001266824-13-000047 · edgardoc.xml · derivative · entry 1

MASSENGILL MATTHEW E · CIK 0001232826 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 224.8792

Underlying: Common Stock · 74.4889 shares

Expires not disclosed

F1 · 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.

F1 · 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.

F1 · 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
April 15, 2013 Filed Apr 17, 2013 00:13 UTC
MILLIGAN STEPHEN DDirector · President & CEO
GrantDividend Equivalent Rights · Derivative 1,244.2116 $0.00 $0.00
Disclosure

SEC source: 0001266824-13-000048 · edgardoc.xml · derivative · entry 1

MILLIGAN STEPHEN D · CIK 0001277246 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,973.671

Underlying: Common Stock · 1,244.2116 shares

Expires not disclosed

F1 · 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.

F1 · 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.

F1 · 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
April 15, 2013 Filed Apr 17, 2013 00:13 UTC GrantDividend Equivalent Rights · Derivative 74.4889 $0.00 $0.00
Disclosure

SEC source: 0001266824-13-000049 · edgardoc.xml · derivative · entry 1

MOORE ROGER H/CA · CIK 0001204825 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 224.8792

Underlying: Common Stock · 74.4889 shares

Expires not disclosed

F1 · 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.

F1 · 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.

F1 · 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
April 15, 2013 Filed Apr 17, 2013 00:13 UTC GrantDividend Equivalent Rights · Derivative 376.2664 $0.00 $0.00
Disclosure

SEC source: 0001266824-13-000050 · edgardoc.xml · derivative · entry 1

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,362.4738

Underlying: Common Stock · 376.2664 shares

Expires not disclosed

F1 · 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.

F1 · 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.

F1 · 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
April 15, 2013 Filed Apr 17, 2013 00:14 UTC GrantDividend Equivalent Rights · Derivative 148.715 $0.00 $0.00
Disclosure

SEC source: 0001266824-13-000051 · edgardoc.xml · derivative · entry 1

PARDUN THOMAS E · CIK 0001232833 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 483.6884

Underlying: Common Stock · 148.715 shares

Expires not disclosed

F1 · 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.

F1 · 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.

F1 · 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
April 15, 2013 Filed Apr 17, 2013 00:14 UTC
SHAKEEL ARIFDirector
GrantDividend Equivalent Rights · Derivative 74.4889 $0.00 $0.00
Disclosure

SEC source: 0001266824-13-000052 · edgardoc.xml · derivative · entry 1

SHAKEEL ARIF · CIK 0001232828 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 224.8792

Underlying: Common Stock · 74.4889 shares

Expires not disclosed

F1 · 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.

F1 · 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.

F1 · 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
March 19, 2013 Filed Mar 20, 2013 21:34 UTC
MILLIGAN STEPHEN DDirector · President & CEO
Exercise / conversionDividend Equivalent Rights · Derivative 226.0752 $0.00 $0.00
Disclosure

SEC source: 0001266824-13-000025 · edgardoc.xml · derivative · entry 3

MILLIGAN STEPHEN D · CIK 0001277246 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,729.4594

Underlying: Common Stock · 226.0752 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 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 $3.67 was also paid to the holder to settle a fractional dividend equivalent of 0.0752.

F1 · derivative.exercise_date: 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 $3.67 was also paid to the holder to settle a fractional dividend equivalent of 0.0752.

F1 · derivative.expiration_date: 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 $3.67 was also paid to the holder to settle a fractional dividend equivalent of 0.0752.

Read SEC document
March 19, 2013 Filed Mar 20, 2013 21:34 UTC
MILLIGAN STEPHEN DDirector · President & CEO
Tax withholdingCommon Stock 7,514 $48.86 $367,134.04
Disclosure

SEC source: 0001266824-13-000025 · edgardoc.xml · nonDerivative · entry 2

MILLIGAN STEPHEN D · CIK 0001277246 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 88,165

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
March 19, 2013 Filed Mar 20, 2013 21:34 UTC
MILLIGAN STEPHEN DDirector · President & CEO
Exercise / conversionCommon Stock 226 $0.00 $0.00
Disclosure

SEC source: 0001266824-13-000025 · edgardoc.xml · nonDerivative · entry 1

MILLIGAN STEPHEN D · CIK 0001277246 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 95,679

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 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 $3.67 was also paid to the holder to settle a fractional dividend equivalent of 0.0752.

Read SEC document
March 18, 2013 Filed Mar 20, 2013 21:34 UTC Exercise / conversionNon-Qualified Stock Option (right to buy) · Derivative 4,364 $0.00 Strike: $27.64 $0.00
Disclosure

SEC source: 0001266824-13-000024 · edgardoc.xml · derivative · entry 10

MASSENGILL MATTHEW E · CIK 0001232826 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,000

Underlying: Common Stock · 4,364 shares

Expires 2014-11-06

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.

F2 · derivative.exercise_date: The option vested 25% on the first anniversary of the grant date and 6.25% at the end of each three-month period thereafter.

Read SEC document
March 18, 2013 Filed Mar 20, 2013 21:34 UTC Exercise / conversionNon-Qualified Stock Option (right to buy) · Derivative 3,607 $0.00 Strike: $25.79 $0.00
Disclosure

SEC source: 0001266824-13-000024 · edgardoc.xml · derivative · entry 9

MASSENGILL MATTHEW E · CIK 0001232826 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,935

Underlying: Common Stock · 3,607 shares

Expires 2018-11-10

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.

F3 · derivative.exercise_date: The option vested 25% one year from the grant date of 11/10/2011, and an additional 6.25% vested at the end of the three-month period on 2/10/2013. The remaining shares subject to the option will vest at 6.25% at the end of each three-month period until fully vested on 11/10/2015.

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