Tandem Diabetes Care (TNDM) chair emeritus reports new RSU grant and vesting

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

Tandem Diabetes Care Chair Emeritus Dick Allen reported routine equity compensation activity. On May 20, 2026, he received a grant of 10,220 restricted stock units (RSUs), each representing a contingent right to one share of common stock or cash under the company’s 2023 Long-Term Incentive Plan. These RSUs will vest on the one-year anniversary of the grant, subject to plan terms.

On May 21, 2026, 8,759 previously granted RSUs vested and converted into the same number of common shares, increasing his directly held common stock to 28,146 shares after the transaction. A separate line shows 22,757 common shares held indirectly through the Allen Family Trust dated October 12, 1981.

Insider Trade Summary

8,759 shares exercised/converted

Mixed 4 txns

Insider Allen Dick

Role null

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Unit	8,759	$0.00	--
Exercise	Common Stock	8,759	$0.00	--
Grant/Award	Restricted Stock Unit	10,220	$0.00	--
holding	Common Stock	--	--	--

Holdings After Transaction: Restricted Stock Unit — 0 shares (Direct, null); Common Stock — 28,146 shares (Direct, null); Common Stock — 22,757 shares (Indirect, See Footnote)

Footnotes (1)

The securities are held by the Allen Family Trust dated October 12, 1981. Each restricted stock units (RSU) represents a contingent right to receive either one share of the Issuers common stock or cash in lieu thereof, at the Issuers 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). Such RSUs were granted to the Reporting Person on May 20, 2026, and will vest on the one-year anniversary thereof, subject to the terms of the 2023 Plan. On May 21, 2025, the Reporting Person was granted 8,759 RSUs, all of which vested and converted into shares of the Issuers common stock on the one-year anniversary thereof in accordance with the 2023 Plan.

Key Figures

New RSU grant: 10,220 RSUs RSUs converted: 8,759 RSUs Direct common shares after vesting: 28,146 shares +2 more

5 metrics

New RSU grant 10,220 RSUs Granted on May 20, 2026 under 2023 Long-Term Incentive Plan

RSUs converted 8,759 RSUs Previously granted on May 21, 2025; vested and converted on May 21, 2026

Direct common shares after vesting 28,146 shares Directly held common stock following May 21, 2026 RSU conversion

Indirect trust holdings 22,757 shares Common stock held by Allen Family Trust dated October 12, 1981

Exercise/Conversion price $0.00 per RSU Reported price per share for RSU grant and conversion entries

Key Terms

Restricted Stock Unit, 2023 Long-Term Incentive Plan, contingent right, Allen Family Trust, +1 more

5 terms

Restricted Stock Unit financial

"Each restricted stock units (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..."

contingent right financial

"represents a contingent right to receive either one share of the Issuers common stock or cash..."

Allen Family Trust financial

"The securities are held by the Allen Family Trust dated October 12, 1981."

grant, award, or other acquisition financial

"transaction_code_description: Grant, award, or other acquisition"

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Form 4 Insider Transactions: What Each Field Means →

05/22/2026 - 09:36 PM

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^*

Allen Dick

(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
Officer (give title below)	X	Other (specify below)
		Chair Emeritus

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/20/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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	05/21/2026		M		8,759	A	$0	28,146	D
Common Stock								22,757	I	See Footnote⁽¹⁾

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Restricted Stock Unit	⁽²⁾	05/20/2026		A		10,220		⁽³⁾	⁽³⁾	Common Stock	10,220	$0	10,220	D
Restricted Stock Unit	⁽²⁾	05/21/2026		M			8,759	⁽⁴⁾	⁽⁴⁾	Common Stock	8,759	$0	0	D

Explanation of Responses:

1. The securities are held by the Allen Family Trust dated October 12, 1981.

2. Each restricted stock units (RSU) represents a contingent right to receive either one share of the Issuers common stock or cash in lieu thereof, at the Issuers 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).

3. Such RSUs were granted to the Reporting Person on May 20, 2026, and will vest on the one-year anniversary thereof, subject to the terms of the 2023 Plan.

4. On May 21, 2025, the Reporting Person was granted 8,759 RSUs, all of which vested and converted into shares of the Issuers common stock on the one-year anniversary thereof in accordance with the 2023 Plan.

Remarks:

Ex. 24: Power of Attorney

	/s/ Jerilyn Laskie, Attorney-in-Fact for Dick P. Allen	05/22/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transactions did Dick Allen report at TANDEM DIABETES CARE INC (TNDM)?

Dick Allen reported routine equity compensation activity, including a grant of 10,220 restricted stock units and the vesting and conversion of 8,759 previously granted RSUs into common shares, increasing his directly held common stock position.

How many restricted stock units did Dick Allen receive in the latest Tandem Diabetes Care (TNDM) Form 4?

He received 10,220 restricted stock units on May 20, 2026. Each RSU represents a contingent right to one share of Tandem Diabetes Care common stock or cash, subject to the company’s 2023 Long-Term Incentive Plan and related award agreements.

What happened to Dick Allen’s 8,759 previously granted RSUs in the Tandem Diabetes Care (TNDM) filing?

The 8,759 RSUs granted on May 21, 2025 fully vested and converted into 8,759 shares of Tandem Diabetes Care common stock on their one-year anniversary, in accordance with the company’s 2023 Long-Term Incentive Plan provisions.

How many Tandem Diabetes Care (TNDM) shares does Dick Allen hold directly after these transactions?

Following the conversion of 8,759 RSUs into common stock, Dick Allen directly holds 28,146 shares of Tandem Diabetes Care common stock. This figure reflects his direct ownership position reported after the May 21, 2026 transaction.

What is the role of the Allen Family Trust in Dick Allen’s Tandem Diabetes Care (TNDM) holdings?

A separate entry shows 22,757 Tandem Diabetes Care common shares held indirectly through the Allen Family Trust dated October 12, 1981, indicating part of his reported ownership is held via this trust entity rather than directly.

Are Dick Allen’s Tandem Diabetes Care (TNDM) transactions open-market buys or routine compensation?

The reported activities are routine compensation-related events, including an RSU grant and the vesting and conversion of existing RSUs into shares, rather than open-market purchases or sales of Tandem Diabetes Care common stock.