Michael Jon Brown, Executive Vice President and Chief Legal Compliance Officer of DexCom Inc (NASDAQ:DXCM), filed a Form 4 on August 25, 2026, reporting a transaction dated August 22, 2026, involving the withholding of common shares to cover tax obligations upon the net settlement of restricted stock units.

Key Highlights

  • Tax withholding transaction: 1,451 shares of common stock were disposed of (transaction code F) at $92.34 per share on August 22, 2026.
  • Not a market sale: According to the filing, the shares represent the amount "required to be withheld by the Issuer to cover tax withholding and remittance obligations in connection with the net settlement of restricted stock units and does not represent a sale by the Reporting Person."
  • Post-transaction ownership: Brown beneficially owned 101,502 shares of common stock following the reported transaction.
  • Unvested RSUs included: Of the 101,502 shares, 71,903 are unvested restricted stock units spanning three grant dates in March 2024, March 2025, and March 2026.
  • RSU vesting schedules: The unvested units consist of 39,019 granted March 8, 2026 (vesting through March 8, 2029); 19,948 granted March 8, 2025 (vesting through March 8, 2028); 5,699 granted March 8, 2025 (vesting through March 8, 2027); and 7,237 granted March 8, 2024 (vesting through March 8, 2027).
  • Direct ownership: All reported securities are held in direct form.

DexCom Officer RSU Tax Withholding: Transaction Details

The filing reports a single non-derivative transaction by Michael Jon Brown, identified as EVP Chief Legal Compliance Officer of DexCom Inc. On August 22, 2026, 1,451 shares of DexCom common stock were disposed of under transaction code F at a price of $92.34 per share. The filing states that this disposal reflects shares withheld by the issuer for tax withholding and remittance purposes connected to the net settlement of restricted stock units, and explicitly notes it does not represent a voluntary sale by Brown.

Following the transaction, Brown's total beneficial ownership stands at 101,502 shares held directly. The filing discloses that 71,903 of those shares are unvested restricted stock units. These consist of four tranches: 39,019 units granted March 8, 2026, vesting through March 8, 2029; 19,948 units granted March 8, 2025, vesting through March 8, 2028; 5,699 units also granted March 8, 2025, vesting through March 8, 2027; and 7,237 units granted March 8, 2024, vesting through March 8, 2027.

The Form 4 was signed by Jereme M. Sylvain as Attorney-in-Fact for Michael Jon Brown and filed on August 25, 2026. No derivative securities transactions were reported. The filing indicates this was filed by one reporting person, with direct ownership form across all reported holdings.

What Was Disclosed

DexCom's EVP Chief Legal Compliance Officer reported the issuer-withheld disposal of 1,451 common shares at $92.34 on August 22, 2026, for tax settlement on RSU vesting, leaving him with 101,502 shares of direct beneficial ownership, including 71,903 unvested RSUs.