Dexcom (DXCM)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-05-08 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: DEXCOM INC (DXCM) CIK: 0001093557 --- Reporting Owner --- Name: AUGUSTINOS NICHOLAS CIK: 0001238485 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-05-08 | Code: G (Gift) Shares: -5,046 | Price: $0.00 Shares Owned After: 0 | Ownership: D (Direct) Footnotes: [F1] Shares were transferred from direct ownership to ownership under the Kirschner/Augustinos Revocable Trust, upon vesting of previously awarded restricted stock units. [Transaction #2] Security: Common Stock Date: 2026-05-08 | Code: G (Gift) Shares: +5,046 | Price: $0.00 Shares Owned After: 38,457 | Ownership: I (Indirect) | Nature: by Trust Footnotes: [F1] Shares were transferred from direct ownership to ownership under the Kirschner/Augustinos Revocable Trust, upon vesting of previously awarded restricted stock units. [F2] Shares are held by the Kirschner/Augustinos Revocable Trust, with respect to which the reporting person is a trustee. --- Footnotes (Complete Index) --- F1: Shares were transferred from direct ownership to ownership under the Kirschner/Augustinos Revocable Trust, upon vesting of previously awarded restricted stock units. F2: Shares are held by the Kirschner/Augustinos Revocable Trust, with respect to which the reporting person is a trustee. --- Signature --- /s/ /s/ Jereme M. Sylvain, as Attorney-in-Fact for Nicholas Augustinos (2026-05-11)