Susan Morrison - 15 Aug 2025 Form 4 Insider Report for TANDEM DIABETES CARE INC (TNDM)

Role
EVP & Chief Admin. Officer
Signature
/s/ Rachel Malina, Attorney-in-Fact for Susan M. Morrison
Issuer symbol
TNDM
Transactions as of
15 Aug 2025
Net transactions value
-$8,050
Form type
4
Filing time
19 Aug 2025, 18:14:43 UTC
Previous filing
05 Jun 2025
Next filing
19 Nov 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Morrison Susan EVP & Chief Admin. Officer 12400 HIGH BLUFF DRIVE, SAN DIEGO /s/ Rachel Malina, Attorney-in-Fact for Susan M. Morrison 19 Aug 2025 0001582970

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction TNDM Common Stock Options Exercise $0 +1,503 +4% $0.000000 38,709 15 Aug 2025 Direct
transaction TNDM Common Stock Tax liability $4,653 -430 -1.1% $10.82 38,279 15 Aug 2025 Direct F1
transaction TNDM Common Stock Options Exercise $0 +1,097 +2.9% $0.000000 39,376 15 Aug 2025 Direct
transaction TNDM Common Stock Tax liability $3,397 -314 -0.8% $10.82 39,062 15 Aug 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 -1,503 -25% $0.000000 4,509 15 Aug 2025 Common Stock 1,503 Direct F2, F3, F4
transaction TNDM Restricted Stock Unit Options Exercise $0 -1,097 -13% $0.000000 7,677 15 Aug 2025 Common Stock 1,097 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 (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.
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.