X0609 4 2026-08-27 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 1 Common Stock 2026-08-27 4 S 0 2565 88.37 D 126043 D On May 28, 2026, Ms. Stern adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by Ms. Stern. The shares set forth above were sold pursuant to the 10b5-1 Plan. 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 2026-08-28