Leigh Vosseller - May 30, 2025 Form 4 Insider Report for TANDEM DIABETES CARE INC (TNDM)

Role
EVP & CHIEF FINANCIAL OFFICER
Signature
/s/ Rachel Malina, Attorney-in-Fact for Leigh A. Vosseller
Stock symbol
TNDM
Transactions as of
May 30, 2025
Transactions value $
$0
Form type
4
Date filed
6/5/2025, 05:30 PM
Previous filing
May 19, 2025
Next filing
Aug 11, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER 12400 HIGH BLUFF DRIVE, SAN DIEGO /s/ Rachel Malina, Attorney-in-Fact for Leigh A. Vosseller 2025-06-05 0001726322

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
holding TNDM Common Stock 33.8K May 30, 2025 Direct
holding TNDM Common Stock 11.9K May 30, 2025 Leigh A. Vosseller Trust 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 Performance Stock Unit Award $0 +31.5K $0.00 31.5K May 30, 2025 Common Stock 31.5K Direct F2, F3
transaction TNDM Restricted Stock Unit Award $0 +31.5K $0.00 31.5K May 30, 2025 Common Stock 31.5K Direct F2, F4, F5
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The securities are held by the Leigh A. Vosseller Trust dated January 17, 2010, of which Leigh Vosseller is the Trustee.
F2 Awarded on May 30, 2025 pursuant to the Tandem Diabetes Care, Inc. 2023 Long-Term Incentive Plan, as amended, and agreements related thereto (the 2023 Plan).
F3 Each performance stock unit (PSU) represents a contingent right to receive one share of Tandem Diabetes Care, Inc. (the Company) common stock based upon the achievement of certain pre-defined performance metrics as of December 31, 2027 (the Measurement Date). The number of shares issued may range from 0% to 200% of the amount specified above, based upon (i) Company's actual performance relative to the pre-defined performance metrics, and (ii) subject to the awardee's continuing service through the Measurement Date. If minimum performance metrics are not met, no PSUs will vest.
F4 Each restricted stock unit (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.
F5 RSU vest as to thirty-three percent (33%) of the total number of shares subject to the RSU on 5/15/2026, and the remaining shares shall vest in eight (8) equal quarterly installments thereafter.