Cynthia Tregillis

General Counsel at WESTERN DIGITAL CORPORATION

Net worth: 62 M $ as of 30/05/2026

57 year

91 connections

Commercial Services

Consumer Services

Electronic Technology

Profile

Cynthia Lock Tregillis currently serves as Director at the U.S.-India Business Council and Silicon Valley Leadership Group since 2023.
Also holds Director positions at The International Anticounterfeiting Coalition and serves as Secretary, Chief Legal Officer & Executive Vice President at Western Digital Corp.
Formerly, Ms. Tregillis was Chairman at the University of Southern California Gould School of Law.
Worked as Partner at McDermott Will & Emery LLP from 2002 to 2006, Partner at Oppenheimer Wolff & Donnelly LLP from 1998 to 2002, and Attorney at Orrick Herrington & Sutcliffe LLP from 2008 to 2012.
Education includes undergraduate studies at Revelle College and the University of San Francisco School of Law.

Known holdings in public companies

Company	Date	Number of shares	Valuation	Valuation date
WESTERN DIGITAL CORPORATION 0.03%	04/06/2026	116,643 ( 0.03% )	62 M $	30/05/2026

Cynthia Tregillis active positions

Companies	Position	Start
WESTERN DIGITAL CORPORATION	General Counsel	11/01/2024
Silicon Valley Leadership Group Silicon Valley Leadership Group Miscellaneous Commercial ServicesCommercial Services Operates advocacy organization to influence public policy relating to the valley	Director/Board Member	31/07/2023
U.S.-India Business Council U.S.-India Business Council Miscellaneous Commercial ServicesCommercial Services Operates as a business advocacy organization	Director/Board Member	30/09/2023
The International Anticounterfeiting Coalition The International Anticounterfeiting Coalition Miscellaneous Commercial ServicesCommercial Services Engages in protecting intellectual property and deterring counterfeiting activities	Director/Board Member	-

All active positions of Cynthia Tregillis

Former positions of Cynthia Tregillis

Companies	Position	End
Orrick Herrington & Sutcliffe LLP Orrick Herrington & Sutcliffe LLP Miscellaneous Commercial ServicesCommercial Services Operates as a law firm in technology, innovation, finance, energy and infrastructure sectors	Corporate Officer/Principal	30/09/2012
McDermott Will & Emery LLP McDermott Will & Emery LLP Miscellaneous Commercial ServicesCommercial Services Operates as a law firm	Corporate Officer/Principal	30/09/2006
Oppenheimer Wolff & Donnelly LLP Oppenheimer Wolff & Donnelly LLP Miscellaneous Commercial ServicesCommercial Services Provides legal services	Corporate Officer/Principal	28/02/2002
University of Southern California Gould School of Law University of Southern California Gould School of Law Other Consumer ServicesConsumer Services Functions as a College/University	Chairman	-

See the detail of Cynthia Tregillis's experience

Training of Cynthia Tregillis

Experiences
Positions held

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Inactive

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Private companies

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Connections

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Linked companies

Private companies	10
Western Digital Corp. Western Digital Corp. Computer PeripheralsElectronic Technology Designs, manufactures and sells hard drives	Electronic Technology
McDermott Will & Emery LLP McDermott Will & Emery LLP Miscellaneous Commercial ServicesCommercial Services Operates as a law firm	Commercial Services
Oppenheimer Wolff & Donnelly LLP Oppenheimer Wolff & Donnelly LLP Miscellaneous Commercial ServicesCommercial Services Provides legal services	Commercial Services
Orrick Herrington & Sutcliffe LLP Orrick Herrington & Sutcliffe LLP Miscellaneous Commercial ServicesCommercial Services Operates as a law firm in technology, innovation, finance, energy and infrastructure sectors	Commercial Services
U.S.-India Business Council U.S.-India Business Council Miscellaneous Commercial ServicesCommercial Services Operates as a business advocacy organization	Commercial Services
Silicon Valley Leadership Group Silicon Valley Leadership Group Miscellaneous Commercial ServicesCommercial Services Operates advocacy organization to influence public policy relating to the valley	Commercial Services
University of Southern California Gould School of Law University of Southern California Gould School of Law Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
Revelle College Revelle College Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
University of San Francisco School of Law University of San Francisco School of Law Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
The International Anticounterfeiting Coalition The International Anticounterfeiting Coalition Miscellaneous Commercial ServicesCommercial Services Engages in protecting intellectual property and deterring counterfeiting activities	Commercial Services