Dexcom (DXCM)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-05-22 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: DEXCOM INC (DXCM) CIK: 0001093557 --- Reporting Owner --- Name: Stern Sadie CIK: 0001797971 Role: Officer (EVP Chief People & Culture Off) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-05-22 | Code: F (Payment of exercise/tax) Shares: -1,451 | Price: $71.90 Total Value: $104,326.90 Shares Owned After: 130,059 | Ownership: D (Direct) Footnotes: [F1] 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 restricted stock units and does not represent a sale by the Reporting Person. [F2] Included in this number are 74,753 unvested restricted stock units, 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, 8,549 of which were granted on March 8, 2025 and shall vest through March 8, 2027, and 7,237 of which were granted on March 8, 2024 and shall vest through March 8, 2027. --- Footnotes (Complete Index) --- F1: 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 restricted stock units and does not represent a sale by the Reporting Person. F2: Included in this number are 74,753 unvested restricted stock units, 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, 8,549 of which were granted on March 8, 2025 and shall vest through March 8, 2027, and 7,237 of which were granted on March 8, 2024 and shall vest through March 8, 2027. --- Signature --- /s/ /s/ Jereme M. Sylvain, as Attorney-in-Fact for Sadie Stern (2026-05-27)