X0306 4 2019-02-15 0 0001438133 TANDEM DIABETES CARE INC TNDM 0001726322 Vosseller Leigh C/O TANDEM DIABETES CARE, INC. 11075 ROSELLE STREET SAN DIEGO CA 92121 0 1 0 0 EVP and CFO Stock Option 51.50 2019-02-15 4 A 0 105000 0.00 A Common Stock 105000 105000 D Granted pursuant to the Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan. The grant is contingent upon future stockholder approval of an increase in the number of shares reserved for issuance under the 2013 Stock Incentive Plan. The option shall vest as to twenty-five percent (25%) of the underlying shares on 2/15/2020, and the remaining shares shall vest in thirty-six (36) equal monthly installments thereafter. The expiration date for these options is ten (10) years from the date of grant. /s/David B. Berger, Attorney-in-Fact for Leigh Vosseller 2019-02-20