GC, Corp Sec
Cynthia L. Tregillis is the Executive Vice President, Chief Legal Officer, and Secretary at Western Digital Corporation (WDC), where she oversees worldwide legal, risk management, compliance, and government relations functions, advising the executive team and Board of Directors.[[1]](http://iacc.org/wp-content/uploads/Cynthia-Tregillis-Bio.pdf)[[3]](https://www.westerndigital.com/company/leadership) She leads efforts in intellectual property protection, brand defense, and regulatory compliance, supporting the company's global storage product operations, having joined in 2012 and progressed to Senior Vice President and Deputy General Counsel.[[1]](http://iacc.org/wp-content/uploads/Cynthia-Tregillis-Bio.pdf)[[3]](https://www.westerndigital.com/company/leadership)
Prior to Western Digital, Tregillis was Of Counsel at Orrick, Herrington & Sutcliffe LLP, and a Partner at McDermott Will & Emery LLP and Oppenheimer, Wolff & Donnelly LLP, specializing in intellectual property and civil litigation; she also served as a judicial clerk at the Superior Court of the District of Columbia.[[1]](http://iacc.org/wp-content/uploads/Cynthia-Tregillis-Bio.pdf) A graduate of the University of California, San Diego (Revelle College) and the University of San Francisco School of Law, she holds board positions with the Silicon Valley Leadership Group, U.S.-India Business Council, and International AntiCounterfeiting Coalition, and is recognized on the World Trademark Review's WTR 300 and Global Leaders lists.[[1]](http://iacc.org/wp-content/uploads/Cynthia-Tregillis-Bio.pdf)[[3]](https://www.westerndigital.com/company/leadership) Recently, as a corporate insider, she sold 6,780 shares of WDC stock on February 6, 2026, at $270.49 per share.[[2]](https://www.stocktitan.net/sec-filings/WDC/form-4-western-digital-corp-insider-trading-activity-8ba482acc43f.html)[[5]](https://www.investing.com/news/insider-trading-news/tregillis-western-digital-chief-legal-officer-sells-183m-in-stock-93CH-4492158)
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