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person · Reporting owner

MASSENGILL MATTHEW E

Disclosed activity across 3 companies

Tapewire entity
11306
SEC CIK
0001232826

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
MICROSEMI CORPMSCC · Entity 166236DirectorMay 29, 2018May 30, 2018
Sandisk CorpSNDK · Entity 1106DirectorMarch 03, 2025March 05, 2025
WESTERN DIGITAL CORPWDC · Entity 1010DirectorSeptember 17, 2026September 21, 2026

Disclosed balances

About these balances

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

MICROSEMI CORP

Report date May 29, 2018 · Filed May 30, 2018

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Microsemi Common StockSEC Table I · non-derivativeDirect0 Reported balance After 2018-05-29 transaction · row 1
1 source row

Row 1 · 2018-05-29 · Disposition to issuer · Disposed 3,255 · Balance 0

F1: Shares disposed of pursuant to the Agreement and Plan of Merger by and among Microchip Technology Incorporated ("Microchip") , Maple Acquisition Corporation and Microsemi Corporation (the "Merger Agreement" and, the transaction contemplated therein, the "Merger"), whereby each share of Issuer's common stock was automatically cancelled and converted into the right to an amount equal to $68.78 in cash (the "Merger Consideration").

Microsemi Common StockSEC Table I · non-derivativeIndirectBy Revocable Living Trust0 Reported balance After 2018-05-29 transaction · row 2 Account identity is unresolved; indirect or unspecified ownership is not merged.
1 source row

Row 2 · 2018-05-29 · Disposition to issuer · Disposed 17,258 · Balance 0

F1: Shares disposed of pursuant to the Agreement and Plan of Merger by and among Microchip Technology Incorporated ("Microchip") , Maple Acquisition Corporation and Microsemi Corporation (the "Merger Agreement" and, the transaction contemplated therein, the "Merger"), whereby each share of Issuer's common stock was automatically cancelled and converted into the right to an amount equal to $68.78 in cash (the "Merger Consideration").

Filing footnotes · ownership attribution and instrument terms

F1: Shares disposed of pursuant to the Agreement and Plan of Merger by and among Microchip Technology Incorporated ("Microchip") , Maple Acquisition Corporation and Microsemi Corporation (the "Merger Agreement" and, the transaction contemplated therein, the "Merger"), whereby each share of Issuer's common stock was automatically cancelled and converted into the right to an amount equal to $68.78 in cash (the "Merger Consideration").

Sandisk Corp

Report date March 03, 2025 · Filed March 05, 2025

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect4,840 Reported balance After 2025-03-03 transaction · row 1
1 source row

Row 1 · 2025-03-03 · Grant · Acquired 4,840 · Balance 4,840

F1: Represents the grant of restricted stock units to the Reporting Person. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Common StockSEC Table I · non-derivativeIndirectBy Family Trust12,308 Reported balance Holding disclosure · report date 2025-03-03 · row 2 Holding and transaction disclosures are not merged.
1 source row

Row 2 · Balance 12,308

F2: The reporting person acquired these shares of Sandisk Common Stock in connection with the spin-off from Western Digital Corporation ("WDC") effective February 21, 2025 (the "Spin-Off"), as further described in the Issuer's current report on Form 8-K filed on February 24, 2025, where each WDC shareholder received one-third (1/3) of one share of Sandisk Common Stock for each share of WDC common stock held. Such acquisition was exempt from Section 16 of the Securities Exchange Act of 1934, as amended("Exchange Act") pursuant to Rule 16a-9 under the Exchange Act.

Common StockSEC Table I · non-derivativeIndirectBy IRA166 Reported balance Holding disclosure · report date 2025-03-03 · row 3 Holding and transaction disclosures are not merged.
1 source row

Row 3 · Balance 166

F2: The reporting person acquired these shares of Sandisk Common Stock in connection with the spin-off from Western Digital Corporation ("WDC") effective February 21, 2025 (the "Spin-Off"), as further described in the Issuer's current report on Form 8-K filed on February 24, 2025, where each WDC shareholder received one-third (1/3) of one share of Sandisk Common Stock for each share of WDC common stock held. Such acquisition was exempt from Section 16 of the Securities Exchange Act of 1934, as amended("Exchange Act") pursuant to Rule 16a-9 under the Exchange Act.

Filing footnotes · ownership attribution and instrument terms

F1: Represents the grant of restricted stock units to the Reporting Person. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

F2: The reporting person acquired these shares of Sandisk Common Stock in connection with the spin-off from Western Digital Corporation ("WDC") effective February 21, 2025 (the "Spin-Off"), as further described in the Issuer's current report on Form 8-K filed on February 24, 2025, where each WDC shareholder received one-third (1/3) of one share of Sandisk Common Stock for each share of WDC common stock held. Such acquisition was exempt from Section 16 of the Securities Exchange Act of 1934, as amended("Exchange Act") pursuant to Rule 16a-9 under the Exchange Act.

WESTERN DIGITAL CORP

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

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Dividend Equivalent RightsSEC Table II · derivative / convertible securityDirect121.1113 Reported balance After 2026-09-17 transaction · row 1 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 1 · 2026-09-17 · Grant · Acquired 10.2654 · Balance 121.1113

F1: 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.

Filing footnotes · ownership attribution and instrument terms

F1: The dividend equivalent rights accrued on previously awarded restricted stock units (RSUs) which vest proportionately with the RSUs to which they relate. Each dividend equivalent right represents a contingent right to receive one share of the Issuer's common stock or the cash value thereof.

Transaction history

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

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

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
January 29, 2007 Filed Feb 1, 2007 00:05 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 5,600 $19.52 $109,312.00
Disclosure

SEC source: 0001266824-07-000023 · edgardoc.xml · nonDerivative · entry 3

MASSENGILL MATTHEW E · CIK 0001232826 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 350,530

Read SEC document
January 29, 2007 Filed Feb 1, 2007 00:05 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 3,500 $19.51 $68,285.00
Disclosure

SEC source: 0001266824-07-000023 · edgardoc.xml · nonDerivative · entry 2

MASSENGILL MATTHEW E · CIK 0001232826 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 356,130

Read SEC document
January 29, 2007 Filed Feb 1, 2007 00:05 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 90,900 $19.50 $1,772,550.00
Disclosure

SEC source: 0001266824-07-000023 · edgardoc.xml · nonDerivative · entry 1

MASSENGILL MATTHEW E · CIK 0001232826 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 359,630

Read SEC document
January 01, 2007 Filed Jan 5, 2007 00:25 UTC WESTERN DIGITAL CORP WDC · Entity 1010 GrantCommon Stock 4,887 $0.00 $0.00
Disclosure

SEC source: 0001266824-07-000011 · edgardoc.xml · nonDerivative · entry 2

MASSENGILL MATTHEW E · CIK 0001232826 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 450,530

F2 · security: Represents the grant of restricted stock units to the reporting person. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Read SEC document
January 01, 2007 Filed Jan 5, 2007 00:25 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Tax withholdingCommon Stock 109,807 $20.46 $2,246,651.22
Disclosure

SEC source: 0001266824-07-000011 · edgardoc.xml · nonDerivative · entry 1

MASSENGILL MATTHEW E · CIK 0001232826 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 445,643

F1 · shares: Payment of tax obligation by withholding securities incident to the vesting of securities in accordance with Rule 16b-3(e).

Read SEC document
June 21, 2006 Filed Jun 23, 2006 22:06 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionEmployee Stock Option (right to buy) · Derivative 4,500 $0.00 Strike: $11.88 $0.00
Disclosure

SEC source: 0001363249-06-000006 · edgardoc.xml · derivative · entry 3

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 4,500 shares

Expires 2006-07-24

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: This transaction is an acquisition of stock pursuant to the exercise of a stock option that would have soon expired.

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
June 21, 2006 Filed Jun 23, 2006 22:06 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionCommon Stock 4,500 $11.88 $53,437.50
Disclosure

SEC source: 0001363249-06-000006 · edgardoc.xml · nonDerivative · entry 1

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 555,450

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: This transaction is an acquisition of stock pursuant to the exercise of a stock option that would have soon expired.

Read SEC document
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionEmployee Stock Option (right to buy) · Derivative 40,000 $0.00 Strike: $12.88 $0.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · derivative · entry 29

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 40,000 shares

Expires 2008-11-17

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 · 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
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionEmployee Stock Option (right to buy) · Derivative 6,784 $0.00 Strike: $12.25 $0.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · derivative · entry 28

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,784 shares

Expires 2008-08-06

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.

F4 · derivative.exercise_date: The option vested 100% seven years from the grant date.

Read SEC document
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionEmployee Stock Option (right to buy) · Derivative 11,500 $0.00 Strike: $11.88 $0.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · derivative · entry 27

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,500

Underlying: Common Stock · 11,500 shares

Expires 2006-07-24

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% on the first anniversary of the grant date and 6.25% at the end of each three-month period thereafter.

Read SEC document
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionEmployee Stock Option (right to buy) · Derivative 10,000 $0.00 Strike: $10.25 $0.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · derivative · entry 26

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 10,000 shares

Expires 2008-09-09

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% on the first anniversary of the grant date and 6.25% at the end of each three-month period thereafter.

Read SEC document
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionEmployee Stock Option (right to buy) · Derivative 85,400 $0.00 Strike: $10.25 $0.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · derivative · entry 25

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,000

Underlying: Common Stock · 85,400 shares

Expires 2008-09-09

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 5% 2 years from the grant date, 15% 3 years from the grant date, 30% 4 years from the grant date, and the final 50% 5 years from the grant date.

Read SEC document
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionEmployee Stock Option (right to buy) · Derivative 121,000 $0.00 Strike: $10.21 $0.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · derivative · entry 24

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 191,500

Underlying: Common Stock · 121,000 shares

Expires 2015-01-20

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_date: A total of 125,000 shares vested one year from the grant date of 1/20/2005. An additional 93,750 shares subject to the option will vest in substantially equal installments at the end of each three-month period until 10/20/2006. The remaining shares subject to the option will vest on 1/1/2007.

Read SEC document
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 1,400 $21.90 $30,660.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · nonDerivative · entry 22

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 550,950

Read SEC document
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 7,500 $21.89 $164,175.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · nonDerivative · entry 21

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 552,350

Read SEC document
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 6,800 $21.88 $148,784.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · nonDerivative · entry 20

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 559,850

Read SEC document
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 800 $21.87 $17,496.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · nonDerivative · entry 19

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 566,650

Read SEC document
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 900 $21.86 $19,674.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · nonDerivative · entry 18

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 567,450

Read SEC document
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 17,300 $21.85 $378,005.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · nonDerivative · entry 17

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 568,350

Read SEC document
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 3,900 $21.84 $85,176.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · nonDerivative · entry 16

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 585,650

Read SEC document
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 32,084 $21.83 $700,393.72
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · nonDerivative · entry 15

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 589,550

Read SEC document
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 40,700 $21.82 $888,074.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · nonDerivative · entry 14

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 621,634

Read SEC document
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 16,200 $21.81 $353,322.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · nonDerivative · entry 13

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 662,334

Read SEC document
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 71,000 $21.80 $1,547,800.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · nonDerivative · entry 12

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 678,534

Read SEC document
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 15,300 $21.79 $333,387.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · nonDerivative · entry 11

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 749,534

Read SEC document
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 8,800 $21.78 $191,664.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · nonDerivative · entry 10

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 764,834

Read SEC document
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 38,300 $21.77 $833,791.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · nonDerivative · entry 9

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 773,634

Read SEC document
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 1,700 $21.76 $36,992.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · nonDerivative · entry 8

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 811,934

Read SEC document
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 12,000 $21.75 $261,000.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · nonDerivative · entry 7

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 813,634

Read SEC document
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionCommon Stock 11,500 $11.88 $136,562.50
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · nonDerivative · entry 6

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 825,634

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
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionCommon Stock 40,000 $12.88 $515,000.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · nonDerivative · entry 5

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 814,134

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
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionCommon Stock 6,784 $12.25 $83,104.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · nonDerivative · entry 4

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 774,134

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
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionCommon Stock 10,000 $10.25 $102,500.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · nonDerivative · entry 3

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 767,350

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
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionCommon Stock 85,400 $10.25 $875,350.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · nonDerivative · entry 2

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 757,350

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
January 31, 2006 Filed Feb 2, 2006 00:32 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionCommon Stock 121,000 $10.21 $1,235,410.00
Disclosure

SEC source: 0001266824-06-000022 · edgardoc.xml · nonDerivative · entry 1

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 671,950

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
December 22, 2005 Filed Dec 23, 2005 23:45 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionEmployee Stock Option (right to buy) · Derivative 150,000 $0.00 Strike: $6.95 $0.00
Disclosure

SEC source: 0001266824-05-000106 · edgardoc.xml · derivative · entry 18

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 150,000 shares

Expires 2012-01-17

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.

F2 · derivative.exercise_date: The option vested 25% 6 months from the grant date of January 17, 2002, and the remaining 75% vested in three equal installments on January 17, 2003, 2004 and 2005.

Read SEC document
December 22, 2005 Filed Dec 23, 2005 23:45 UTC WESTERN DIGITAL CORP WDC · Entity 1010 Exercise / conversionEmployee Stock Option (right to buy) · Derivative 100,000 $0.00 Strike: $6.50 $0.00
Disclosure

SEC source: 0001266824-05-000106 · edgardoc.xml · derivative · entry 17

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 100,000 shares

Expires 2009-06-17

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.

F1 · derivative.exercise_date: The option vested in four equal installments on each December 17, 1999, February 1, 2000, July 1, 2000 and December 1, 2000.

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December 22, 2005 Filed Dec 23, 2005 23:45 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 2,000 $18.81 $37,620.00
Disclosure

SEC source: 0001266824-05-000106 · edgardoc.xml · nonDerivative · entry 15

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 550,950

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December 22, 2005 Filed Dec 23, 2005 23:45 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 12,700 $18.78 $238,506.00
Disclosure

SEC source: 0001266824-05-000106 · edgardoc.xml · nonDerivative · entry 14

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 552,950

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December 22, 2005 Filed Dec 23, 2005 23:45 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 22,000 $18.77 $412,940.00
Disclosure

SEC source: 0001266824-05-000106 · edgardoc.xml · nonDerivative · entry 13

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 565,650

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December 22, 2005 Filed Dec 23, 2005 23:45 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 31,500 $18.79 $591,885.00
Disclosure

SEC source: 0001266824-05-000106 · edgardoc.xml · nonDerivative · entry 12

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 587,650

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December 22, 2005 Filed Dec 23, 2005 23:45 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 60,056 $18.80 $1,129,052.80
Disclosure

SEC source: 0001266824-05-000106 · edgardoc.xml · nonDerivative · entry 11

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 619,150

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December 22, 2005 Filed Dec 23, 2005 23:45 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 25,000 $18.84 $471,000.00
Disclosure

SEC source: 0001266824-05-000106 · edgardoc.xml · nonDerivative · entry 10

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 679,206

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December 22, 2005 Filed Dec 23, 2005 23:45 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 58,900 $18.85 $1,110,265.00
Disclosure

SEC source: 0001266824-05-000106 · edgardoc.xml · nonDerivative · entry 9

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 704,206

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December 22, 2005 Filed Dec 23, 2005 23:45 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 10,000 $18.86 $188,600.00
Disclosure

SEC source: 0001266824-05-000106 · edgardoc.xml · nonDerivative · entry 8

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 763,106

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December 22, 2005 Filed Dec 23, 2005 23:45 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 5,000 $18.92 $94,600.00
Disclosure

SEC source: 0001266824-05-000106 · edgardoc.xml · nonDerivative · entry 7

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 773,106

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December 22, 2005 Filed Dec 23, 2005 23:45 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 10,100 $18.94 $191,294.00
Disclosure

SEC source: 0001266824-05-000106 · edgardoc.xml · nonDerivative · entry 6

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 778,106

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December 22, 2005 Filed Dec 23, 2005 23:45 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 25,000 $18.95 $473,750.00
Disclosure

SEC source: 0001266824-05-000106 · edgardoc.xml · nonDerivative · entry 5

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 788,206

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December 22, 2005 Filed Dec 23, 2005 23:45 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 29,000 $19.00 $551,000.00
Disclosure

SEC source: 0001266824-05-000106 · edgardoc.xml · nonDerivative · entry 4

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 813,206

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December 22, 2005 Filed Dec 23, 2005 23:45 UTC WESTERN DIGITAL CORP WDC · Entity 1010 SaleCommon Stock 36,000 $19.02 $684,720.00
Disclosure

SEC source: 0001266824-05-000106 · edgardoc.xml · nonDerivative · entry 3

MASSENGILL MATTHEW E · CIK 0001232826 · Director · Chairman of the Board

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 842,206

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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.