DexCom Officer Files Form 144 to Sell 1,700 Shares Under 10b5-1 Plan

Executive Summary

On October 15, 2026, Michael Jon Brown, an Officer of DexCom, Inc. ($DXCM), submitted a Form 144 filing declaring the intention to sell 1,700 shares of common stock through Morgan Stanley Smith Barney LLC. The proposed sale has an estimated market value of $145,316.00, representing an average price of approximately $85.48 per share.

Transaction & Plan Background

• Acquisition Origin: The 1,700 shares were originally acquired as restricted stock directly from DexCom, Inc. on March 8, 2026.
• Pre-Scheduled Trading Plan: The proposed sale is executed pursuant to a Rule 10b5-1 trading plan adopted on November 26, 2025.
• Prior Dispositions: The reporting officer reported consistent monthly sales under the plan:
  • September 15, 2026: 1,700 shares for gross proceeds of $142,868.00
  • August 14, 2026: 1,700 shares for gross proceeds of $156,281.00

Market Impact & Significance

The filing is deemed of Low trading significance. The 1,700 shares represent a negligible fraction of DexCom's 377,360,765 outstanding shares and reflect routine, programmatic selling under a pre-established Rule 10b5-1 trading schedule.