John F. Sheridan - Nov 17, 2025 Form 4 Insider Report for TANDEM DIABETES CARE INC (TNDM)

Role
PRESIDENT & CEO, Director
Signature
/s/ Shannon M. Hansen, Attorney-in-Fact for John F. Sheridan
Stock symbol
TNDM
Transactions as of
Nov 17, 2025
Transactions value $
-$108,254
Form type
4
Date filed
11/19/2025, 04:07 PM
Previous filing
Aug 19, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Sheridan John F PRESIDENT & CEO, Director 12400 HIGH BLUFF DRIVE, SAN DIEGO /s/ Shannon M. Hansen, Attorney-in-Fact for John F. Sheridan 2025-11-19 0001365369

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction TNDM Common Stock Options Exercise $0 +5.47K +4.89% $0.00 117K Nov 17, 2025 Direct
transaction TNDM Common Stock Tax liability -$51.7K -2.78K -2.37% $18.61 115K Nov 17, 2025 Direct F1
transaction TNDM Common Stock Options Exercise $0 +5.98K +5.22% $0.00 121K Nov 17, 2025 Direct
transaction TNDM Common Stock Tax liability -$56.5K -3.04K -2.52% $18.61 118K Nov 17, 2025 Direct F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction TNDM Restricted Stock Unit Options Exercise $0 -5.47K -33.34% $0.00 10.9K Nov 17, 2025 Common Stock 5.47K Direct F2, F3, F4
transaction TNDM Restricted Stock Unit Options Exercise $0 -5.98K -14.29% $0.00 35.9K Nov 17, 2025 Common Stock 5.98K Direct F3, F5, F6
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 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.
F2 Awarded on May 25, 2023 pursuant to the Tandem Diabetes Care Inc. 2023 Long-Term Incentive Plan, as amended, and agreements related thereto (the 2023 Plan).
F3 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.
F4 RSU vest as to thirty-three percent (33%) of the total number of shares subject to the RSU on 5/15/2024, and the remaining shares shall vest in eight (8) equal quarterly installments thereafter.
F5 Awarded on May 23, 2024 pursuant to the 2023 Plan, as amended.
F6 RSU vest as to thirty-three percent (33%) of the total number of shares subject to the RSU on 5/15/2025, and the remaining shares shall vest in eight (8) equal quarterly installments thereafter.