Western Digital Director Martin I. Cole Sells 4,000 Shares via Rule 10b5-1 Plan

Executive Summary

On October 29, 2026, Martin I. Cole, a Director of Western Digital Corp ($WDC), executed open-market sales totaling 4,000 shares of Common Stock across 12 weighted-average price tranches ranging from $390.04 to $401.47 per share. The transactions generated aggregate gross proceeds of approximately $1,582,928.09 at a weighted average price of approximately $395.73 per share.

Transaction Details

• Security: Common Stock
• Nature of Ownership: Direct
• Total Volume Sold: 4,000 shares
• Weighted Average Sale Price: ~$395.73
• Total Transaction Value: $1,582,928.09
• Pre-Transaction Holdings: 21,433 shares
• Post-Transaction Holdings: 17,433 shares
• Percentage of Holdings Sold: ~18.66%

Context and Analysis

All sales reported were executed pursuant to a pre-arranged Rule 10b5-1 trading plan adopted on March 5, 2026. Because the sales were carried out under a scheduled trading plan adopted well in advance, the trading significance is categorized as Low, indicating routine portfolio diversification rather than opportunistic market timing based on material non-public information.