=== 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: Driscoll Rimma
CIK: 0001952575
Role: Director
--- Non-Derivative Transactions ---
[Transaction #1]
Security: Common Stock
Date: 2026-05-28 | Code: A (Grant or award)
Shares: +5,605 | Price: $0.00
Shares Owned After: 17,319 | 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 6,941 unvested restricted stock units, 5,605 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 1,336 of which were granted on August 24, 2023 and shall vest through August 24, 2026.
--- 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 6,941 unvested restricted stock units, 5,605 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 1,336 of which were granted on August 24, 2023 and shall vest through August 24, 2026.
--- Signature ---
/s/ /s/ Jereme M. Sylvain, as Attorney-in-Fact for Rimma Driscoll (2026-06-01)
