Dick Allen - 21 May 2025 Form 4 Insider Report for TANDEM DIABETES CARE INC (TNDM)

Role: Director
Signature: /s/ Rachel Malina, Attorney-in-Fact for Dick P. Allen
Issuer symbol: TNDM
Transactions as of: 21 May 2025
Net transactions value: +$90,548
Form type: 4
Filing time: 23 May 2025, 16:02:47 UTC
Previous filing: 09 Aug 2024
Next filing: 04 Jun 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Allen Dick	Director	12400 HIGH BLUFF DRIVE, SAN DIEGO	/s/ Rachel Malina, Attorney-in-Fact for Dick P. Allen	23 May 2025	0001582779

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	TNDM	Common Stock	Options Exercise	$90,548	+4,387	+29%	$20.64	19,387	22 May 2025	Direct
holding	TNDM	Common Stock						22,757	21 May 2025	See Footnote	F1
holding	TNDM	Common Stock						1,000	21 May 2025	See Footnote	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	Restricted Stock Unit	Options Exercise	$0	-4,387	-100%	$0.000000	0	22 May 2025	Common Stock	4,387		Direct	F3, F4, F5
transaction	TNDM	Restricted Stock Unit	Award	$0	+8,759		$0.000000	8,759	21 May 2025	Common Stock	8,759		Direct	F4, F5, F6

* 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 Allen Family Trust dated October 12, 1981.
F2	The securities are held by the Gammon Children's 2000 Trust FBO Jake Allen Gammon. The Reporting Person is co-trustee of the Gammon Children's 2000 Trust FBO Jake Allen Gammon and has shared voting and investment power over the securities held by the Gammon Children's 2000 Trust FBO Jake Allen Gammon and may be deemed to have indirect beneficial ownership of such securities. The Reporting Person disclaims beneficial ownership of such securities held by the Gammon Children's 2000 Trust FBO Jake Allen Gammon.
F3	Awarded on May 22, 2024 pursuant to the Tandem Diabetes Care, Inc. 2023 Long-Term Incentive Plan, as amended, and agreements related thereto (the 2023 Plan).
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 will vest on the one-year anniversary of the grant date, subject to the terms of the 2023 Plan.
F6	Awarded on May 21, 2025 pursuant to the 2023 Plan.