=== SEC Form 4 — Statement of Changes in Beneficial Ownership ===
Document Type: 4
Period of Report: 2026-03-08
10b5-1 Pre-arranged Plan: No
--- Issuer ---
Name: DEXCOM INC (DXCM)
CIK: 0001093557
--- Reporting Owner ---
Name: Brown Michael Jon
CIK: 0001899922
Role: Officer (EVP, Chief Legal Officer)
--- Non-Derivative Transactions ---
[Transaction #1]
Security: Common Stock
Date: 2026-03-08 | Code: A (Grant or award)
Shares: +39,019 | Price: $0.00
Shares Owned After: 137,929 | Ownership: D (Direct)
Footnotes:
[F1] Represents a grant of restricted stock units (RSUs) that are exempt from Section 16b-3 and are subject to vesting in three equal annual installments from the date of grant. RSUs represent a contingent right to receive one share of DexCom, Inc. Common Stock.
[Transaction #2]
Security: Common Stock
Date: 2026-03-08 | Code: F (Payment of exercise/tax)
Shares: -23,325 | Price: $68.10
Total Value: $1,588,432.50
Shares Owned After: 114,604 | Ownership: D (Direct)
Footnotes:
[F2] Represents the number of shares required to be withheld by the Issuer to cover tax withholding and remittance obligations in connection with the net settlement of RSUs and does not represent a sale by the Reporting Person.
[F3] Included in this number are 77,603 unvested RSUs, 39,019 of which were granted on March 8, 2026 and shall vest through March 8, 2029, 19,948 of which were granted on March 8, 2025 and shall vest through March 8, 2028, 11,399 of which were granted on March 8, 2025 and shall vest through March 8, 2027, 7,237 of which were granted on March 8, 2024 and shall vest through March 8, 2027, and 255 additional shares acquired under the Issuer's Amended and Restated 2015 Employee Stock Purchase Plan.
--- Footnotes (Complete Index) ---
F1: Represents a grant of restricted stock units (RSUs) that are exempt from Section 16b-3 and are subject to vesting in three equal annual installments from the date of grant. RSUs represent a contingent right to receive one share of DexCom, Inc. Common Stock.
F2: Represents the number of shares required to be withheld by the Issuer to cover tax withholding and remittance obligations in connection with the net settlement of RSUs and does not represent a sale by the Reporting Person.
F3: Included in this number are 77,603 unvested RSUs, 39,019 of which were granted on March 8, 2026 and shall vest through March 8, 2029, 19,948 of which were granted on March 8, 2025 and shall vest through March 8, 2028, 11,399 of which were granted on March 8, 2025 and shall vest through March 8, 2027, 7,237 of which were granted on March 8, 2024 and shall vest through March 8, 2027, and 255 additional shares acquired under the Issuer's Amended and Restated 2015 Employee Stock Purchase Plan.
--- Signature ---
/s/ /s/ Jereme M. Sylvain, as Attorney-in-Fact for Michael Jon Brown (2026-03-10)
