WDC

SEC source: 0001266824-13-000161 · edgardoc.xml · derivative · entry 7

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,162

Underlying: Common Stock · 8,133 shares

Expires 2016-09-10

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.

F1 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 17, 2013.

F3 · 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.

SEC source: 0001266824-13-000161 · edgardoc.xml · derivative · entry 6

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,849 shares

Expires 2015-09-11

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 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 17, 2013.

F3 · 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.

SEC source: 0001266824-13-000161 · edgardoc.xml · derivative · entry 5

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,750 shares

Expires 2016-02-04

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 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 17, 2013.

F3 · 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.

SEC source: 0001266824-13-000161 · edgardoc.xml · nonDerivative · entry 4

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 53,609

F2 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $72.49 to a high of $72.61. 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.

SEC source: 0001266824-13-000161 · edgardoc.xml · nonDerivative · entry 3

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 74,962

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 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 17, 2013.

SEC source: 0001266824-13-000161 · edgardoc.xml · nonDerivative · entry 2

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 67,113

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 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 17, 2013.

SEC source: 0001266824-13-000161 · edgardoc.xml · nonDerivative · entry 1

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 58,980

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 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 17, 2013.

SEC source: 0001266824-13-000159 · edgardoc.xml · nonDerivative · entry 1

CORDANO MICHAEL D · CIK 0001201490 · President, HGST Subsidiary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 90,825

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 7, 2013.

F2 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $71.78 to a high of $71.801. 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.

SEC source: 0001266824-13-000145 · edgardoc.xml · derivative · entry 1

COTE KATHLEEN A · CIK 0001181540 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 337.2542

Underlying: Common Stock · 56.2572 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.

SEC source: 0001266824-13-000146 · edgardoc.xml · derivative · entry 1

DENERO HENRY T · CIK 0001227538 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 461.3445

Underlying: Common Stock · 74.5273 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.

SEC source: 0001266824-13-000147 · edgardoc.xml · derivative · entry 1

KIMSEY WILLIAM L · CIK 0001232832 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 337.2542

Underlying: Common Stock · 56.2572 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.

SEC source: 0001266824-13-000148 · edgardoc.xml · derivative · entry 1

LAMBERT MICHAEL D · CIK 0001077820 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 337.2542

Underlying: Common Stock · 56.2572 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.

SEC source: 0001266824-13-000149 · edgardoc.xml · derivative · entry 1

Lauer Len J · CIK 0001202231 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 337.2542

Underlying: Common Stock · 56.2572 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.

SEC source: 0001266824-13-000150 · edgardoc.xml · derivative · entry 1

MASSENGILL MATTHEW E · CIK 0001232826 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 337.2542

Underlying: Common Stock · 56.2572 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.

SEC source: 0001266824-13-000151 · edgardoc.xml · derivative · entry 1

MOORE ROGER H/CA · CIK 0001204825 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 337.2542

Underlying: Common Stock · 56.2572 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.

SEC source: 0001266824-13-000152 · edgardoc.xml · derivative · entry 1

PARDUN THOMAS E · CIK 0001232833 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 708.0419

Underlying: Common Stock · 112.3162 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.

SEC source: 0001266824-13-000153 · edgardoc.xml · derivative · entry 1

SHAKEEL ARIF · CIK 0001232828 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 337.2542

Underlying: Common Stock · 56.2572 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.

SEC source: 0001266824-13-000154 · edgardoc.xml · derivative · entry 1

CORDANO MICHAEL D · CIK 0001201490 · President, HGST Subsidiary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,120.5495

Underlying: Common Stock · 397.7378 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.

SEC source: 0001266824-13-000155 · edgardoc.xml · derivative · entry 1

LEYDEN TIMOTHY M · CIK 0001398362 · President, WD Subsidiary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,680.0176

Underlying: Common Stock · 458.4405 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.

SEC source: 0001266824-13-000156 · edgardoc.xml · derivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,297.8302

Underlying: Common Stock · 1,106.5145 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.

SEC source: 0001266824-13-000157 · edgardoc.xml · derivative · entry 1

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,485.853

Underlying: Common Stock · 278.6308 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.

SEC source: 0001266824-13-000130 · edgardoc.xml · derivative · entry 3

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 77,125

Underlying: Common Stock · 7,712 shares

Expires 2019-03-19

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 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 20, 2013.

F2 · derivative.exercise_date: The option vested 25% one year from the grant date of 3/19/2012, and an additional 6.25% vested on 9/19/2013. The remaining shares subject to the option will vest at 6.25% at the end of each three-month period until fully vested on 3/19/2016.

SEC source: 0001266824-13-000130 · edgardoc.xml · nonDerivative · entry 2

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 130,467

F1 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 20, 2013.

SEC source: 0001266824-13-000130 · edgardoc.xml · nonDerivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 138,179

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 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 20, 2013.

SEC source: 0001266824-13-000126 · edgardoc.xml · derivative · entry 12

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,429 shares

Expires 2015-02-06

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.

F3 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 17, 2013.

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.

SEC source: 0001266824-13-000126 · edgardoc.xml · derivative · entry 11

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 3,015 shares

Expires 2016-02-17

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 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 17, 2013.

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.

SEC source: 0001266824-13-000126 · edgardoc.xml · derivative · entry 10

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 5,920 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.

F3 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 17, 2013.

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.

SEC source: 0001266824-13-000126 · edgardoc.xml · derivative · entry 9

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 2,130 shares

Expires 2016-11-08

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 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 17, 2013.

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.

SEC source: 0001266824-13-000126 · edgardoc.xml · nonDerivative · entry 7

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 57,230

F3 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 17, 2013.

F4 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $65.23 to a high of $65.88. 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.

SEC source: 0001266824-13-000126 · edgardoc.xml · nonDerivative · entry 6

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 77,273

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 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 17, 2013.

SEC source: 0001266824-13-000126 · edgardoc.xml · nonDerivative · entry 5

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 71,353

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 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 17, 2013.

SEC source: 0001266824-13-000126 · edgardoc.xml · nonDerivative · entry 4

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 69,223

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 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 17, 2013.

SEC source: 0001266824-13-000126 · edgardoc.xml · nonDerivative · entry 3

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 66,208

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 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 17, 2013.

SEC source: 0001266824-13-000124 · edgardoc.xml · derivative · entry 3

LEYDEN TIMOTHY M · CIK 0001398362 · President, WD Subsidiary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,221.5771

Underlying: Common Stock · 524.273 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 $17.74 was also paid to the holder to settle a fractional dividend equivalent of 0.2730.

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 $17.74 was also paid to the holder to settle a fractional dividend equivalent of 0.2730.

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 $17.74 was also paid to the holder to settle a fractional dividend equivalent of 0.2730.

SEC source: 0001266824-13-000124 · edgardoc.xml · nonDerivative · entry 2

LEYDEN TIMOTHY M · CIK 0001398362 · President, WD Subsidiary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 215,647

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

SEC source: 0001266824-13-000124 · edgardoc.xml · nonDerivative · entry 1

LEYDEN TIMOTHY M · CIK 0001398362 · President, WD Subsidiary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 228,554

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 $17.74 was also paid to the holder to settle a fractional dividend equivalent of 0.2730.

SEC source: 0001266824-13-000126 · edgardoc.xml · derivative · entry 8

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,207.2222

Underlying: Common Stock · 196.5915 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 $38.44 was also paid to the holder to settle a fractional dividend equivalent of 0.5915.

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 $38.44 was also paid to the holder to settle a fractional dividend equivalent of 0.5915.

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 $38.44 was also paid to the holder to settle a fractional dividend equivalent of 0.5915.

SEC source: 0001266824-13-000126 · edgardoc.xml · nonDerivative · entry 2

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 58,779

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

SEC source: 0001266824-13-000126 · edgardoc.xml · nonDerivative · entry 1

NICKL WOLFGANG U. · CIK 0001499701 · EVP & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 63,618

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 $38.44 was also paid to the holder to settle a fractional dividend equivalent of 0.5915.

SEC source: 0001266824-13-000123 · edgardoc.xml · derivative · entry 3

CORDANO MICHAEL D · CIK 0001201490 · President, HGST Subsidiary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 70,751

Underlying: Common Stock · 23,584 shares

Expires 2019-09-06

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.

F1 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 7, 2013.

F3 · derivative.exercise_date: The option vested 25% one year from the grant date of 9/6/2012. The remaining shares subject to the option will vest at 6.25% at the end of each three-month period until fully vested on 9/6/2016.

SEC source: 0001266824-13-000123 · edgardoc.xml · nonDerivative · entry 2

CORDANO MICHAEL D · CIK 0001201490 · President, HGST Subsidiary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 93,685

F1 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 7, 2013.

F2 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $64.90 to a high of $65.12. 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.

SEC source: 0001266824-13-000123 · edgardoc.xml · nonDerivative · entry 1

CORDANO MICHAEL D · CIK 0001201490 · President, HGST Subsidiary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 117,269

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 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 7, 2013.

SEC source: 0001266824-13-000125 · edgardoc.xml · derivative · entry 3

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 73,963

Underlying: Common Stock · 24,655 shares

Expires 2019-09-16

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 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 20, 2013.

F3 · derivative.exercise_date: The option vested 25% one year from the grant date of 9/6/2012. The remaining shares subject to the option will vest at 6.25% at the end of each three-month period until fully vested on 9/6/2016.

SEC source: 0001266824-13-000125 · edgardoc.xml · nonDerivative · entry 2

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 130,467

F1 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 20, 2013.

F2 · price: Represents the weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from a low of $65 to a high of $65.19. 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.

SEC source: 0001266824-13-000125 · edgardoc.xml · nonDerivative · entry 1

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 155,122

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 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 20, 2013.

SEC source: 0001266824-13-000118 · edgardoc.xml · derivative · entry 2

Lauer Len J · CIK 0001202231 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 280.997

Underlying: Common Stock · 13.8364 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 $51.86 was also paid to the holder to settle a fractional dividend equivalent of 0.8364.

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 $51.86 was also paid to the holder to settle a fractional dividend equivalent of 0.8364.

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 $51.86 was also paid to the holder to settle a fractional dividend equivalent of 0.8364.

SEC source: 0001266824-13-000118 · edgardoc.xml · nonDerivative · entry 1

Lauer Len J · CIK 0001202231 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,745

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 $51.86 was also paid to the holder to settle a fractional dividend equivalent of 0.8364.

SEC source: 0001266824-13-000116 · edgardoc.xml · nonDerivative · entry 1

CORDANO MICHAEL D · CIK 0001201490 · President, HGST Subsidiary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 93,685

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 7, 2013.

SEC source: 0001266824-13-000111 · edgardoc.xml · derivative · entry 8

CORDANO MICHAEL D · CIK 0001201490 · President, HGST Subsidiary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,345

Underlying: Common Stock · 2,395 shares

Expires 2019-05-16

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 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 7, 2013.

F6 · derivative.exercise_date: The option vested 25% one year from the grant date of 5/16/2012, and an additional 6.25% vested at 8/16/2013. The remaining shares subject to the option will vest at 6.25% at the end of each three-month period until fully vested on 5/16/2016.

SEC source: 0001266824-13-000111 · edgardoc.xml · nonDerivative · entry 6

CORDANO MICHAEL D · CIK 0001201490 · President, HGST Subsidiary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 96,544

F5 · kind: These transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 7, 2013.