X0609 4 2026-08-22 0 0001093557 DEXCOM INC DXCM 0001797971 Stern Sadie false 6340 SEQUENCE DRIVE SAN DIEGO CA 92121 0 1 0 0 EVP Chief People & Culture Off 0 Common Stock 2026-08-22 4 F 0 1451 92.34 D 128608 D 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. Included in this number are 71,903 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, 5,699 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. /s/ Jereme M. Sylvain, as Attorney-in-Fact for Sadie Stern 2026-08-25