Tandem Diabetes Care grants 29,136 RSUs to EVP

Gasser Elizabeth Anne reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Gasser Elizabeth Anne reported acquisition or exercise transactions in this Form 4 filing.

Tandem Diabetes Care Inc. reported that EVP and Chief Strategy Officer Elizabeth Anne Gasser received a grant of 29,136 restricted stock units (RSUs). Each RSU represents a contingent right to one share of common stock or cash, at the company’s discretion, under the 2023 Long-Term Incentive Plan.

All 29,136 RSUs are held directly and bring her reported RSU holdings in this award to 29,136 units. One-third of the RSUs will vest on May 29, 2027, with the remaining units vesting in eight equal quarterly installments on the 15th of the month thereafter, subject to the plan’s terms. This is a compensation-related equity award, not an open-market purchase or sale.

Insider Trade Summary

Grant/Award: 29,136 shares

Grant/Award 1 txn

Insider Gasser Elizabeth Anne

Role EVP, Chief Strategy Officer

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Unit	29,136	$0.00	$0.00

Holdings After Transaction: Restricted Stock Unit — 29,136 contracts (Direct)

Footnotes (2)

1. F1. Each restricted stock unit (RSU) represents a contingent right to receive either one share of the Issuer's common stock or cash in lieu thereof, at the Issuer's discretion, in accordance with the terms of the Tandem Diabetes Care, Inc. 2023 Long-Term Incentive Plan, as amended, and agreements related thereto (the 2023 Plan).
2. F2. One-third of such RSUs shall vest on 5/29/2027, and the remaining RSUs shall vest in eight (8) equal quarterly installments on the 15th of the month thereafter subject to the terms of the 2023 Plan.

Key Figures

RSUs granted: 29,136 units Underlying common stock: 29,136 shares Transaction price per share: $0.00 per unit +3 more

6 metrics

RSUs granted 29,136 units Restricted stock units granted to EVP, Chief Strategy Officer

Underlying common stock 29,136 shares Shares underlying the RSU award

Transaction price per share $0.00 per unit Grant price for RSUs under compensation plan

Total RSUs after transaction 29,136 units Reported holdings for this RSU award after grant

Initial vesting date May 29, 2027 One-third of RSUs vest on this date

Subsequent vesting structure 8 quarterly installments Remaining RSUs vest quarterly on the 15th thereafter

Key Terms

Restricted Stock Unit, 2023 Long-Term Incentive Plan, vest, contingent right, +1 more

5 terms

Restricted Stock Unit financial

"Each restricted stock unit (RSU) represents a contingent right to receive either one share"

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

2023 Long-Term Incentive Plan financial

"in accordance with the terms of the Tandem Diabetes Care, Inc. 2023 Long-Term Incentive Plan"

vest financial

"One-third of such RSUs shall vest on 5/29/2027, and the remaining RSUs shall vest"

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

contingent right financial

"represents a contingent right to receive either one share of the Issuer's common stock or cash"

derivative financial

"the transaction is reported as a derivative security tied to common stock"

A derivative is a financial contract whose value depends on the price or performance of another asset or measure — for example a stock, index, interest rate, commodity, or currency. Investors use derivatives like insurance or leveraged bets to hedge risk, speculate, or gain exposure without owning the underlying asset; they can protect portfolios but also amplify losses and introduce counterparty and market risk.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Tandem Diabetes Care (TNDM) disclose about Elizabeth Gasser in this Form 4?

Tandem Diabetes Care disclosed that EVP and Chief Strategy Officer Elizabeth Anne Gasser received a grant of 29,136 restricted stock units under the company’s 2023 Long-Term Incentive Plan as equity compensation, rather than through any open-market share purchase or sale.

How many Tandem Diabetes Care (TNDM) RSUs were granted to Elizabeth Gasser?

Elizabeth Anne Gasser received 29,136 restricted stock units. Each RSU represents a contingent right to receive either one share of Tandem Diabetes Care common stock or cash in lieu, at the company’s discretion, in accordance with the 2023 Long-Term Incentive Plan.

What is the vesting schedule for Elizabeth Gasser’s Tandem Diabetes Care (TNDM) RSUs?

One-third of Elizabeth Gasser’s 29,136 RSUs will vest on May 29, 2027. The remaining RSUs vest in eight equal quarterly installments on the 15th of the month thereafter, subject to the terms of Tandem Diabetes Care’s 2023 Long-Term Incentive Plan.

Are Elizabeth Gasser’s Tandem Diabetes Care (TNDM) RSUs an open-market transaction?

No, the 29,136 RSUs reported for Elizabeth Gasser are a grant classified as a grant, award, or other acquisition. They are compensation-related restricted stock units, not an open-market purchase or sale of Tandem Diabetes Care common shares.

How many Tandem Diabetes Care (TNDM) RSUs does Elizabeth Gasser hold after this grant?

Following this reported transaction, Elizabeth Anne Gasser’s position for this award reflects 29,136 restricted stock units held directly. The Form 4 shows these RSUs as derivative securities tied to an equivalent number of underlying Tandem Diabetes Care common shares.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 06/02/2026 - 04:21 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Gasser Elizabeth Anne

(Last) (First) (Middle)

12400 HIGH BLUFF DRIVE

(Street)

SAN DIEGO CALIFORNIA 92130

(City) (State) (Zip)

UNITED STATES

(Country)

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 Strategy Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/29/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction 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)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction 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 (Month/Day/Year)		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: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Unit	(1)	05/29/2026		A		29,136		(2)	(2)	Common Stock	29,136	$0	29,136	D

Explanation of Responses:

1. Each restricted stock unit (RSU) represents a contingent right to receive either one share of the Issuer's common stock or cash in lieu thereof, at the Issuer's discretion, in accordance with the terms of the Tandem Diabetes Care, Inc. 2023 Long-Term Incentive Plan, as amended, and agreements related thereto (the 2023 Plan).

2. One-third of such RSUs shall vest on 5/29/2027, and the remaining RSUs shall vest in eight (8) equal quarterly installments on the 15th of the month thereafter subject to the terms of the 2023 Plan.

Remarks:

Ex. 24: Power of Attorney

	/s/ Jerilyn Laskie, Attorney-in-Fact for Elizabeth A. Gasser	06/02/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)