Leigh Vosseller - May 25, 2023 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 25, 2023
Transactions value $: -$3,746
Form type: 4
Date filed: 5/30/2023, 09:23 PM
Previous filing: May 17, 2023
Next filing: Aug 17, 2023

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	TNDM	Common Stock	Options Exercise	$0	+406	+3.8%	$0.00	11.1K	May 30, 2023	Direct
transaction	TNDM	Common Stock	Tax liability	-$3.75K	-141	-1.27%	$26.57	10.9K	May 30, 2023	Direct	F1
holding	TNDM	Common Stock						5.66K	May 25, 2023	Leigh A. Vosseller Trust	F2

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	RSU 2023 05 25	Award	$0	+18K		$0.00	18K	May 25, 2023	Common Stock	18K	$0.00	Direct	F3, F4, F5
transaction	TNDM	PSU 2023 05 25	Award	$0	+8.88K		$0.00	8.88K	May 25, 2023	Common Stock	8.88K	$0.00	Direct	F3, F6
transaction	TNDM	Restricted Stock Unit	Options Exercise	$0	-406	-19.98%	$0.00	1.63K	May 30, 2023	Common Stock	406		Direct	F7, F8

* 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	The securities are held by the Leigh A. Vosseller Trust dated January 17, 2010, of which Leigh Vosseller is the Trustee.
F3	Awarded on May 25, 2023 pursuant to the Tandem Diabetes Care, Inc. 2023 Long-Term Incentive Plan (the 2023 Plan).
F4	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.
F5	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.
F6	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, 2025 (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 PSU's will vest.
F7	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 Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan (the 2013 Plan).
F8	RSU vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on the one year anniversary of the grant date, and the remaining shares shall vest in twelve (12) equal quarterlyinstallments thereafter, subject to the terms of the 2013 Plan.