Tandem Diabetes Care (TNDM) CTO awarded 26,003 RSUs under 2023 incentive plan

Rhea-AI Filing Summary

Carpenter Rick reported acquisition or exercise transactions in this Form 4 filing.

Tandem Diabetes Care EVP & Chief Technology Officer Rick Carpenter received a grant of 26,003 restricted stock units (RSUs). Each RSU represents a right to receive one share of common stock or cash, under the company’s 2023 Long-Term Incentive Plan. One-third of the RSUs will vest on May 29, 2027, with the remaining units vesting in eight equal quarterly installments thereafter, subject to plan terms and continued service.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Carpenter Rick

Role EVP & Chief Technology Officer

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Unit	26,003	$0.00	--

Holdings After Transaction: Restricted Stock Unit — 26,003 shares (Direct, null)

Footnotes (1)

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). 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: 26,003 RSUs Underlying common shares: 26,003 shares Holdings after transaction: 26,003 RSUs +2 more

5 metrics

RSUs granted 26,003 RSUs Grant to EVP & CTO Rick Carpenter

Underlying common shares 26,003 shares Each RSU equals one common share or cash

Holdings after transaction 26,003 RSUs Total derivative securities following grant

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

Subsequent vesting pattern 8 quarterly installments Remaining RSUs vest in equal quarterly tranches

Key Terms

Restricted Stock Unit, contingent right, Long-Term Incentive Plan, vest, +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.

contingent right financial

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

Long-Term Incentive Plan financial

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

A long-term incentive plan is a company program that pays executives or employees with stock, options, or cash tied to multi-year performance goals, where the rewards become theirs only after meeting conditions over time. Think of it as a delayed bonus or retirement-style reward that aligns employees’ interests with shareholders by encouraging them to boost long-term value; investors watch these plans because they affect pay costs, share dilution and management incentives.

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.

quarterly installments financial

"the remaining RSUs shall vest in eight (8) equal quarterly installments on the 15th of the month..."

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Form 4 Insider Transactions: What Each Field Means →

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^*

Carpenter Rick

(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 Technology 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		26,003		(2)	(2)	Common Stock	26,003	$0	26,003	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 Rick A. Carpenter	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)

FAQ

What did Tandem Diabetes Care (TNDM) disclose about Rick Carpenter in this Form 4?

Tandem Diabetes Care reported that EVP & Chief Technology Officer Rick Carpenter received 26,003 restricted stock units. These RSUs are part of the company’s 2023 Long-Term Incentive Plan and represent potential future common shares or cash, subject to vesting conditions.

How many restricted stock units did TNDM grant to EVP & CTO Rick Carpenter?

Rick Carpenter was granted 26,003 restricted stock units. Each RSU corresponds to one share of Tandem Diabetes Care common stock or cash, at the company’s discretion, under the 2023 Long-Term Incentive Plan and related award agreements.

When do Rick Carpenter’s 26,003 RSUs at Tandem Diabetes Care vest?

One-third of Rick Carpenter’s RSUs vest on May 29, 2027. The remaining restricted stock units vest in eight equal quarterly installments on the 15th of the month thereafter, assuming continued satisfaction of the 2023 Long-Term Incentive Plan’s terms.

What does each RSU granted to Rick Carpenter by Tandem Diabetes Care represent?

Each restricted stock unit represents a contingent right to receive one share of Tandem Diabetes Care common stock or, alternatively, cash. The choice between stock or cash is at the company’s discretion, consistent with the 2023 Long-Term Incentive Plan provisions.

Is Rick Carpenter’s Form 4 transaction a market buy or sell of TNDM shares?

The Form 4 reflects a grant of 26,003 restricted stock units, not a market purchase or sale. This is a compensation-related award under Tandem Diabetes Care’s 2023 Long-Term Incentive Plan, classified as an acquisition (grant/award) of derivative securities.

How many Tandem Diabetes Care derivative securities does Rick Carpenter hold after this grant?

Following the transaction, Rick Carpenter is reported as holding 26,003 restricted stock units. These units are derivatives tied to Tandem Diabetes Care common stock and will convert into shares or cash only as they vest under the plan’s terms.