X0609 4 2026-10-15 0 0001438133 TANDEM DIABETES CARE INC TNDM 0001804186 Kyrillos Jean-Claude false 12400 HIGH BLUFF DRIVE SAN DIEGO CA 92130 0 1 0 0 EVP & Chief Operating Officer 0 Common Stock 2026-10-15 4 M 0 3637 0 A 33927 D Common Stock 2026-10-15 4 F 0 1926 16.52 D 32001 D Restricted Stock Unit 2026-10-15 4 M 0 3637 0 D Common Stock 3637 10908 D Shares withheld by the Issuer to satisfy tax withholding requirements upon the vesting of restricted stock units (RSUs). 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. One-third of the RSUs granted on July 15, 2024 vested on July 15, 2025, with the remaining RSUs vesting in eight (8) equal quarterly installments thereafter, subject to the terms of the 2023 Plan. /s/ Jerilyn Laskie, Attorney-in-Fact for Jean-Claude Kyrillos 2026-10-19