Leigh Vosseller - May 15, 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 15, 2023
Transactions value $: -$5,615
Form type: 4
Date filed: 5/17/2023, 06:10 PM
Previous filing: May 16, 2023
Next filing: May 30, 2023

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	TNDM	Common Stock	Award	$17.3K	+633	+7.28%	$27.32	9.33K	May 15, 2023	Direct	F1
transaction	TNDM	Common Stock	Options Exercise	$0	+163	+1.75%	$0.00	9.49K	May 15, 2023	Direct
transaction	TNDM	Common Stock	Tax liability	-$1.83K	-57	-0.6%	$32.13	9.43K	May 15, 2023	Direct	F2
transaction	TNDM	Common Stock	Options Exercise	$0	+1.9K	+20.11%	$0.00	11.3K	May 15, 2023	Direct
transaction	TNDM	Common Stock	Tax liability	-$21.1K	-656	-5.79%	$32.13	10.7K	May 15, 2023	Direct	F2
holding	TNDM	Common Stock						5.66K	May 15, 2023	Leigh A. Vosseller Trust	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	-163	-11.15%	$0.00	1.3K	May 15, 2023	Common Stock	163		Direct	F4, F5
transaction	TNDM	Restricted Stock Unit	Options Exercise	$0	-1.9K	-33.33%	$0.00	3.79K	May 15, 2023	Common Stock	1.9K		Direct	F4, F6

* 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 16, 2022 through May 15, 2023. 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 Leigh A. Vosseller Trust dated January 17, 2010, of which Leigh Vosseller is the Trustee.
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 Tandem Diabetes Care, Inc. 2013 Stock Incentive Plan (the 2013 Plan).
F5	RSU granted on 5/18/2021 vest as to twenty-five percent (25%) of the total number of shares subject to the RSU on the 15th day of the month that corresponds to the anniversary of the grant date, and the remaining shares shall vest in twelve (12) equal quarterly installments thereafter, subject to the terms of the 2013 Plan.
F6	RSU granted on 5/25/2022 vest as to thirty-three percent (33%) of the total number of shares subject to the RSU on the 15th day of the month that corresponds to the anniversary of the grant date, and the remaining shares shall vest in eight (8) equal quarterly installments thereafter, subject to the terms of the 2013 Plan.