MASSENGILL MATTHEW E

Director at MICROSEMI CORP · on record since Mar 31, 2006
Director at WESTERN DIGITAL CORP · on record since Feb 1, 2006
Director at VIEWSONIC CORP · on record since May 15, 2007
Director at Sandisk Corp · on record since Jan 31, 2025
Director at CONEXANT SYSTEMS INC · on record since Jun 23, 2008
Director at GT Advanced Technologies Inc. · on record since Sep 16, 2008
Chairman of the Board at WESTERN DIGITAL CORP · on record since Dec 2, 2005

Insider trading activity of MASSENGILL MATTHEW E

Transactions on record: 494; since Sep 23, 2003

Open-market buys: 0

Open-market sells: 248; $77.9M

Companies traded: 6; last filing Sep 21, 2026

Figures computed from official regulatory filings — .

Companies where MASSENGILL MATTHEW E has traded

WESTERN DIGITAL CORP436 tx · $110.5M · Sep 21, 2026
Sandisk Corp1 tx · Mar 4, 2025
MICROSEMI CORP25 tx · $5.2M · May 30, 2018
GT Advanced Technologies Inc.21 tx · Jun 5, 2014
CONEXANT SYSTEMS INC8 tx · $117.6K · Apr 21, 2011
VIEWSONIC CORP3 tx · May 15, 2007

Track record of MASSENGILL MATTHEW E

Insufficient history for a statistical track record (fewer than 5 open-market buys).

Transaction history of MASSENGILL MATTHEW E

Co-insiders of MASSENGILL MATTHEW E

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Src
WESTERN DIGITAL CORPListing on record	Sep 21, 2026	AwardD (derivative)	10.27	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
WESTERN DIGITAL CORPListing on record	Jun 22, 2026	AwardD (derivative)	6.11	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
WESTERN DIGITAL CORPListing on record	Mar 19, 2026	AwardD (derivative)	11.88	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
WESTERN DIGITAL CORPListing on record	Feb 6, 2026	Sell	-400	268.06 USD	$107.2K	SEC
WESTERN DIGITAL CORPListing on record	Feb 6, 2026	Sell	-5,987	260.57 USD	$1.6M	SEC
WESTERN DIGITAL CORPListing on record	Feb 6, 2026	Sell	-2,200	264.99 USD	$583K	SEC
WESTERN DIGITAL CORPListing on record	Feb 6, 2026	Sell	-7,000	258.67 USD	$1.8M	SEC
WESTERN DIGITAL CORPListing on record	Feb 6, 2026	Sell	-4,411	257.69 USD	$1.1M	SEC
WESTERN DIGITAL CORPListing on record	Feb 6, 2026	Sell	-916	265.92 USD	$243.6K	SEC
WESTERN DIGITAL CORPListing on record	Feb 6, 2026	Sell	-4,915	259.59 USD	$1.3M	SEC
WESTERN DIGITAL CORPListing on record	Feb 6, 2026	Sell	-3,597	261.71 USD	$941.4K	SEC
WESTERN DIGITAL CORPListing on record	Feb 6, 2026	Sell	-2,600	256.63 USD	$667.2K	SEC
WESTERN DIGITAL CORPListing on record	Feb 6, 2026	Sell	-2,600	264.01 USD	$686.4K	SEC
WESTERN DIGITAL CORPListing on record	Feb 6, 2026	Sell	-2,300	262.77 USD	$604.4K	SEC
WESTERN DIGITAL CORPListing on record	Dec 22, 2025	AwardD (derivative)	20.69	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
WESTERN DIGITAL CORPListing on record	Nov 21, 2025	Award	1,585	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
WESTERN DIGITAL CORPListing on record	Sep 22, 2025	AwardD (derivative)	26.02	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
WESTERN DIGITAL CORPListing on record	Jun 23, 2025	AwardD (derivative)	46.14	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Sandisk CorpListing unverified	Mar 4, 2025	Award	4,840	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
WESTERN DIGITAL CORPListing on record	Nov 22, 2024	Award	4,542	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
WESTERN DIGITAL CORPListing on record	Nov 16, 2023	Award	6,300	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
WESTERN DIGITAL CORPListing on record	Nov 17, 2022	Award	7,962	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
WESTERN DIGITAL CORPListing on record	Nov 17, 2021	Award	4,958	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
WESTERN DIGITAL CORPListing on record	Nov 19, 2020	Award	6,825	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
WESTERN DIGITAL CORPListing on record	Nov 17, 2020	ExerciseD (derivative)	-110.34	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC

Company	Filed	Type	Qty	Price	Value · USD	Src
WESTERN DIGITAL CORPListing on record	Sep 21, 2026	AwardD (derivative)	10.27	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
WESTERN DIGITAL CORPListing on record	Jun 22, 2026	AwardD (derivative)	6.11	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
WESTERN DIGITAL CORPListing on record	Mar 19, 2026	AwardD (derivative)	11.88	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
WESTERN DIGITAL CORPListing on record	Feb 6, 2026	Sell	-400	268.06 USD	$107.2K	SEC
WESTERN DIGITAL CORPListing on record	Feb 6, 2026	Sell	-5,987	260.57 USD	$1.6M	SEC
WESTERN DIGITAL CORPListing on record	Feb 6, 2026	Sell	-2,200	264.99 USD	$583K	SEC
WESTERN DIGITAL CORPListing on record	Feb 6, 2026	Sell	-7,000	258.67 USD	$1.8M	SEC
WESTERN DIGITAL CORPListing on record	Feb 6, 2026	Sell	-4,411	257.69 USD	$1.1M	SEC
WESTERN DIGITAL CORPListing on record	Feb 6, 2026	Sell	-916	265.92 USD	$243.6K	SEC
WESTERN DIGITAL CORPListing on record	Feb 6, 2026	Sell	-4,915	259.59 USD	$1.3M	SEC
WESTERN DIGITAL CORPListing on record	Feb 6, 2026	Sell	-3,597	261.71 USD	$941.4K	SEC
WESTERN DIGITAL CORPListing on record	Feb 6, 2026	Sell	-2,600	256.63 USD	$667.2K	SEC
WESTERN DIGITAL CORPListing on record	Feb 6, 2026	Sell	-2,600	264.01 USD	$686.4K	SEC
WESTERN DIGITAL CORPListing on record	Feb 6, 2026	Sell	-2,300	262.77 USD	$604.4K	SEC
WESTERN DIGITAL CORPListing on record	Dec 22, 2025	AwardD (derivative)	20.69	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
WESTERN DIGITAL CORPListing on record	Nov 21, 2025	Award	1,585	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
WESTERN DIGITAL CORPListing on record	Sep 22, 2025	AwardD (derivative)	26.02	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
WESTERN DIGITAL CORPListing on record	Jun 23, 2025	AwardD (derivative)	46.14	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Sandisk CorpListing unverified	Mar 4, 2025	Award	4,840	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
WESTERN DIGITAL CORPListing on record	Nov 22, 2024	Award	4,542	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
WESTERN DIGITAL CORPListing on record	Nov 16, 2023	Award	6,300	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
WESTERN DIGITAL CORPListing on record	Nov 17, 2022	Award	7,962	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
WESTERN DIGITAL CORPListing on record	Nov 17, 2021	Award	4,958	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
WESTERN DIGITAL CORPListing on record	Nov 19, 2020	Award	6,825	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
WESTERN DIGITAL CORPListing on record	Nov 17, 2020	ExerciseD (derivative)	-110.34	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC