Statement of Changes in Beneficial Ownership (4)

FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^* HANSEN BRIAN B	2. Issuer Name and Ticker or Trading Symbol TANDEM DIABETES CARE INC [ TNDM ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) EVP & CHIEF COMMERCIAL OFFICER
(Last) (First) (Middle) 11075 ROSELLE ST	3. Date of Earliest Transaction (MM/DD/YYYY) 1/29/2020
(Street) SAN DIEGO, CA 92121 (City) (State) (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) _X _ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. Code (Instr. 8)		4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	1/29/2020		M		4055	A	$18.86	7046	D
Common Stock	1/29/2020		S⁽¹⁾		4055	D	$77.51	2991	D
Common Stock	1/29/2020		M		15000	A	$18.86	17991	D
Common Stock	1/29/2020		S⁽¹⁾		15000	D	$74.82 ⁽²⁾	2991	D
Common Stock	1/29/2020		M		10000	A	$18.86	12991	D
Common Stock	1/29/2020		S⁽¹⁾		10000	D	$72.7842 ⁽³⁾	2991	D
Common Stock	1/30/2020		M		20945	A	$18.86	23936	D
Common Stock	1/30/2020		S⁽¹⁾		20945	D	$77.6153 ⁽⁴⁾	2991	D

*Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)*
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)			11. Nature of Indirect Beneficial Ownership (Instr. 4)
Stock Option	$18.86	1/29/2020		M		0		⁽⁵⁾	⁽⁶⁾	Common Stock	50000.0	$0	25000	D

Explanation of Responses:
(1)	The shares were sold pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 16, 2019.
(2)	The price reported reflects the weighted average price per share of multiple transactions with prices per share ranging between $74.76 and $74.90.
(3)	The price reported reflects the weighted average price per share of multiple transactions with prices per share ranging between $72.76 and $73.13.
(4)	The price reported reflects the weighted average price per share of multiple transactions with prices per share ranging between $77.51 and $77.77.
(5)	The option shall vest as to fifty percent (50%) of the underlying shares on 6/14/2019, and the remaining shares shall vest in twelve (12) equal monthly installments thereafter.
(6)	The expiration date for these options is 10 years from the date of grant.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
HANSEN BRIAN B 11075 ROSELLE ST SAN DIEGO, CA 92121			EVP & CHIEF COMMERCIAL OFFICER