=== 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: Osterloh Albert Frederick IV
CIK: 0002111108
Role: Director
--- Non-Derivative Transactions ---
[Transaction #1]
Security: Common Stock
Date: 2026-05-28 | Code: A (Grant or award)
Shares: +1,630 | Price: $0.00
Shares Owned After: 8,691 | 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 8,691 unvested restricted stock units, 1,630 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 7,061 of which were granted on February 26, 2026 and shall vest through February 26, 2029.
--- 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 8,691 unvested restricted stock units, 1,630 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 7,061 of which were granted on February 26, 2026 and shall vest through February 26, 2029.
--- Signature ---
/s/ /s/ Jereme M. Sylvain, as Attorney-in-Fact for Albert Frederick (Rick) Osterloh IV (2026-06-01)
