Jean-Claude Kyrillos - 15 Jan 2026 Form 4 Insider Report for TANDEM DIABETES CARE INC (TNDM)

Role
EVP & Chief Operating Officer
Signature
/s/ Shannon M. Hansen, Attorney-in-Fact for Jean-Claude Kyrillos
Issuer symbol
TNDM
Transactions as of
15 Jan 2026
Net transactions value
-$44,626
Form type
4
Filing time
20 Jan 2026, 16:09:55 UTC
Previous filing
19 Nov 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Kyrillos Jean-Claude EVP & Chief Operating Officer 12400 HIGH BLUFF DRIVE, SAN DIEGO /s/ Shannon M. Hansen, Attorney-in-Fact for Jean-Claude Kyrillos 20 Jan 2026 0001804186

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction TNDM Common Stock Options Exercise $0 +3,636 +16% $0.000000 26,180 15 Jan 2026 Direct
transaction TNDM Common Stock Tax liability $44,626 -2,118 -8.1% $21.07 24,062 15 Jan 2026 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 -3,636 -14% $0.000000 21,817 15 Jan 2026 Common Stock 3,636 Direct F2, F3, F4
* 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 July 15, 2024 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 7/15/2025, and the remaining shares shall vest in eight (8) equal quarterly installments thereafter.