Notice of Proposed Sale · 144
Western Digital Corporation
WDCNASDAQEQUITYCurrent
Notice of Proposed Sale
Structured filing — 144
primary_doc.xml
Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.
Proposed-sale notice
- Issuer
- WESTERN DIGITAL CORPORATION
- Issuer CIK
- 0000106040
- SEC file number
- 001-08703
- Phone
- (408) 717-6000
- Person for whose account securities are to be sold
- CYNTHIA LOCK TREGILLIS
- Relationships to issuer
- Officer
- Street
- 5601 Great Oaks Parkway
- City
- San Jose
- State / country code
- CA
- Postal code
- 95119
Securities proposed for sale
| Security | Proposed units | Aggregate market value | Units outstanding | Approximate sale date | Exchange | Broker / market maker |
|---|---|---|---|---|---|---|
| Common | 808 | 427,941.04 | 344,682,131 | 07/21/2026 | NASDAQ | Morgan Stanley Smith Barney LLC Executive Financial Services |
Broker / market maker — proposed row 1, entry 1
- Name
- Morgan Stanley Smith Barney LLC Executive Financial Services
- Street
- 1 New York Plaza
- Street (continued)
- 8th Floor
- City
- New York
- State / country code
- NY
- Postal code
- 10004
Acquisition of securities to be sold
| Security | Acquired | Nature of acquisition | Acquired from | Amount acquired | Gift transaction | Payment date | Nature of payment |
|---|---|---|---|---|---|---|---|
| Common | 07/20/2026 | Restricted Stock | ISSUER | 808 | N | 07/20/2026 | Not Applicable |
Sales reported in the preceding three months
| Seller | Security | Sale date | Amount sold | Gross proceeds |
|---|---|---|---|---|
| CYNTHIA LOCK TREGILLIS | Common | 06/05/2026 | 432 | 235,699.20 |
| CYNTHIA LOCK TREGILLIS | Common | 05/27/2026 | 214 | 115,480.82 |
| CYNTHIA LOCK TREGILLIS | Common | 05/22/2026 | 308 | 150,491.88 |
| CYNTHIA LOCK TREGILLIS | Common | 05/21/2026 | 106 | 48,640.22 |
Seller — prior-sale row 1, entry 1
- Name
- CYNTHIA LOCK TREGILLIS
- Street
- 5601 Great Oaks Parkway
- City
- San Jose
- State / country code
- CA
- Postal code
- 95119
Seller — prior-sale row 2, entry 1
- Name
- CYNTHIA LOCK TREGILLIS
- Street
- 5601 Great Oaks Parkway
- City
- San Jose
- State / country code
- CA
- Postal code
- 95119
Seller — prior-sale row 3, entry 1
- Name
- CYNTHIA LOCK TREGILLIS
- Street
- 5601 Great Oaks Parkway
- City
- San Jose
- State / country code
- CA
- Postal code
- 95119
Seller — prior-sale row 4, entry 1
- Name
- CYNTHIA LOCK TREGILLIS
- Street
- 5601 Great Oaks Parkway
- City
- San Jose
- State / country code
- CA
- Postal code
- 95119
Prior-sale reporting
- Nothing to report for the preceding three months
- N
Notice signature
- Notice date
- 07/21/2026
- Signed
- /s/ Cynthia Lock Tregillis
- Plan adoption dates
- 03/06/2026
Company context
At Western Digital, our vision is to unleash the power and value of data. For decades, we have been at the forefront of storage innovation, which fuels our mission to be the market leader in data storage, delivering solutions for now and the future. We are committed to providing scalable, sustainable technology for the world’s hyperscalers, enterprises, and cloud providers, and delivering cutting-edge innovation that will drive the next generation of AI-driven data workloads. All that we do is powered by our people, who are united in a common purpose of creating solutions that move the world forward. Follow Western Digital on LinkedIn and learn more at www.westerndigital.com.