X0508 4 2026-01-15 0 0001438133 TANDEM DIABETES CARE INC TNDM 0001804186 Kyrillos Jean-Claude 12400 HIGH BLUFF DRIVE SAN DIEGO CA 92130 0 1 0 0 EVP & Chief Operating Officer 0 Common Stock 2026-01-15 4 M 0 3636 0 A 26180 D Common Stock 2026-01-15 4 F 0 2118 21.07 D 24062 D Restricted Stock Unit 2026-01-15 4 M 0 3636 0 D Common Stock 3636 21817 D Shares withheld by Tandem Diabetes Care Inc. (the Company) to satisfy tax withholding requirements on vesting of restricted stock units (RSU). No shares were sold. Awarded on July 15, 2024 pursuant to the Tandem Diabetes Care Inc. 2023 Long-Term Incentive Plan, as amended, and agreements related thereto (the 2023 Plan). Each RSU represents a contingent right to receive either one share of common stock of the Issuer or cash in lieu thereof, at the Issuer's discretion, in accordance with the terms of the 2023 Plan. RSU vest as to thirty-three percent (33%) of the total number of shares subject to the RSU on 7/15/2025, and the remaining shares shall vest in eight (8) equal quarterly installments thereafter. /s/ Shannon M. Hansen, Attorney-in-Fact for Jean-Claude Kyrillos 2026-01-20