=== SEC Form 4 — Statement of Changes in Beneficial Ownership ===
Document Type: 4
Period of Report: 2026-05-28
10b5-1 Pre-arranged Plan: No
--- Issuer ---
Name: DEXCOM INC (DXCM)
CIK: 0001093557
--- Reporting Owner ---
Name: Ashley Euan A.
CIK: 0002092523
Role: Director
--- Non-Derivative Transactions ---
[Transaction #1]
Security: Common Stock
Date: 2026-05-28 | Code: A (Grant or award)
Shares: +5,565 | Price: $0.00
Shares Owned After: 12,731 | Ownership: D (Direct)
Footnotes:
[F1] The RSU Award was granted on May 28, 2026 and 100% of the RSU Award will vest on the earlier of the one year anniversary of the grant date or the date of DexCom, Inc.'s 2027 Annual Meeting of Stockholders. Each share is represented by a restricted stock unit (RSU) that represents a contingent right to receive one share of DexCom, Inc. Common Stock upon settlement.
[F2] Included in this number are 12,731 unvested restricted stock units, 5,565 of which were granted on May 28, 2026 and will vest on the earlier of the one year anniversary of the grant date or the date of DexCom, Inc.'s 2027 Annual Meeting of Stockholders, and 7,166 of which were granted on October 24, 2025 and shall vest through October 24, 2028.
--- Footnotes (Complete Index) ---
F1: The RSU Award was granted on May 28, 2026 and 100% of the RSU Award will vest on the earlier of the one year anniversary of the grant date or the date of DexCom, Inc.'s 2027 Annual Meeting of Stockholders. Each share is represented by a restricted stock unit (RSU) that represents a contingent right to receive one share of DexCom, Inc. Common Stock upon settlement.
F2: Included in this number are 12,731 unvested restricted stock units, 5,565 of which were granted on May 28, 2026 and will vest on the earlier of the one year anniversary of the grant date or the date of DexCom, Inc.'s 2027 Annual Meeting of Stockholders, and 7,166 of which were granted on October 24, 2025 and shall vest through October 24, 2028.
--- Signature ---
/s/ /s/ Jereme M. Sylvain, as Attorney-in-Fact for Dr. Euan Ashley (2026-06-01)
