Elizabeth A. Gasser - May 15, 2025 Form 4 Insider Report for TANDEM DIABETES CARE INC (TNDM)

Role
EVP, Chief Strategy Officer
Signature
/s/ Rachel Malina, Attorney-in-Fact for Elizabeth A. Gasser
Stock symbol
TNDM
Transactions as of
May 15, 2025
Transactions value $
-$61,420
Form type
4
Date filed
5/19/2025, 06:06 PM
Previous filing
Feb 27, 2025
Next filing
Jun 2, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Gasser Elizabeth Anne EVP, Chief Strategy Officer 12400 HIGH BLUFF DRIVE, SAN DIEGO /s/ Rachel Malina, Attorney-in-Fact for Elizabeth A. Gasser 2025-05-19 0001866283

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction TNDM Common Stock Award $17.9K +1.15K +16.33% $15.64 8.17K May 15, 2025 Direct F1
transaction TNDM Common Stock Options Exercise $0 +162 +1.98% $0.00 8.33K May 15, 2025 Direct
transaction TNDM Common Stock Tax liability -$1.97K -87 -1.04% $22.70 8.25K May 15, 2025 Direct F2
transaction TNDM Common Stock Options Exercise $0 +474 +5.75% $0.00 8.72K May 15, 2025 Direct
transaction TNDM Common Stock Tax liability -$5.77K -254 -2.91% $22.70 8.47K May 15, 2025 Direct F2
transaction TNDM Common Stock Options Exercise $0 +1.5K +17.76% $0.00 9.97K May 15, 2025 Direct
transaction TNDM Common Stock Tax liability -$18.3K -805 -8.08% $22.70 9.16K May 15, 2025 Direct F2
transaction TNDM Common Stock Options Exercise $0 +4.39K +47.88% $0.00 13.6K May 15, 2025 Direct
transaction TNDM Common Stock Tax liability -$53.3K -2.35K -17.34% $22.70 11.2K May 15, 2025 Direct F2
holding TNDM Common Stock 11.7K May 15, 2025 See Footnote F3

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 -162 -100% $0.00 0 May 15, 2025 Common Stock 162 Direct F4, F5, F6
transaction TNDM Restricted Stock Unit Options Exercise $0 -474 -100% $0.00 0 May 15, 2025 Common Stock 474 Direct F5, F7, F8
transaction TNDM Restricted Stock Unit Options Exercise $0 -1.5K -20% $0.00 6.01K May 15, 2025 Common Stock 1.5K Direct F9, F10, F11
transaction TNDM Restricted Stock Unit Options Exercise $0 -4.39K -33.33% $0.00 8.77K May 15, 2025 Common Stock 4.39K Direct F10, F12, F13
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The reporting person is voluntarily reporting the acquisition of shares of common stock pursuant to the Tandem Diabetes Care, Inc. Amended and Restated 2013 Employee Stock Purchase Plan (ESPP), for the ESPP purchase period of November 18, 2024, through May 15, 2025. This transaction is also exempt under Rule 16b-3(c).
F2 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.
F3 The securities are held by The Gasser Family Trust dated September 1, 2011, of which Elizabeth A. Gasser is a co-trustee.
F4 Awarded on May 18, 2021 pursuant to the Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan, as amended, and the agreements related thereto (the 2013 Plan).
F5 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 2013 Plan.
F6 RSU vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on 5/15/2022, and the remaining shares shall vest in twelve (12) equal quarterly installments thereafter.
F7 Awarded on May 25, 2022 pursuant to the 2013 Plan.
F8 RSU vest as to thirty-three percent (33%) of the total number of shares subject to the RSU on 5/15/2023, and the remaining shares shall vest in eight (8) equal quarterly installments thereafter.
F9 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).
F10 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.
F11 RSU vest as to thiry-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.
F12 Awarded on May 23, 2024 pursuant to the 2023 Plan.
F13 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.