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Tandem Diabetes (TNDM) director gets 10,220 RSUs as 8,759 vest

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Tandem Diabetes Care director Rebecca B. Robertson received 10,220 restricted stock units (RSUs) on May 20, 2026 under the company’s 2023 Long-Term Incentive Plan. A prior grant of 8,759 RSUs from May 21, 2025 vested and converted into 8,759 common shares on its one-year anniversary, bringing her direct holdings to 22,542 shares.

Positive

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Negative

  • None.
Insider ROBERTSON REBECCA B
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 --
Holdings After Transaction: Restricted Stock Unit — 0 shares (Direct, null); Common Stock — 22,542 shares (Direct, null)
Footnotes (1)
  1. 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.
New RSU grant 10,220 RSUs Granted on May 20, 2026 to director Rebecca B. Robertson
Prior RSU grant vested 8,759 RSUs Granted May 21, 2025; vested and converted on one-year anniversary
Shares received from vesting 8,759 shares Common stock issued upon RSU conversion
Shares held after transactions 22,542 shares Direct common stock holdings following RSU conversion
RSU exercise transactions 1 exercise, 8,759 RSUs Derivative exercise/conversion on May 21, 2026
Restricted Stock Unit financial
"The filing lists transactions in "Restricted Stock Unit" and explains each RSU represents a contingent right to receive stock or cash."
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
"RSUs are granted under the Tandem Diabetes Care, Inc. 2023 Long-Term Incentive Plan, as amended."
vest financial
"Such RSUs were granted to the Reporting Person on May 20, 2026, and will vest on the one-year anniversary thereof."
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.
derivative exercise/conversion financial
"The transaction code description states "Exercise or conversion of derivative security" for RSU conversions."
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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED 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*
ROBERTSON REBECCA B
(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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/20/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock05/21/2026M8,759A$022,542D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Unit(1)05/20/2026A10,220 (2) (2)Common Stock10,220$010,220D
Restricted Stock Unit(1)05/21/2026M8,759 (3) (3)Common Stock8,759$00D
Explanation of Responses:
1. 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).
2. 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.
3. 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 Rebecca B. Robertson05/22/2026
** Signature of Reporting PersonDate
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 Tandem Diabetes Care (TNDM) report for Rebecca B. Robertson?

Tandem Diabetes Care reported that director Rebecca B. Robertson received 10,220 restricted stock units on May 20, 2026 and saw a prior grant of 8,759 RSUs from May 21, 2025 vest and convert into 8,759 common shares on its one-year anniversary.

How many Tandem Diabetes (TNDM) shares does Rebecca B. Robertson hold after these transactions?

After these transactions, Rebecca B. Robertson directly holds 22,542 shares of Tandem Diabetes common stock. This reflects the conversion of 8,759 previously granted RSUs into common shares, while her new 10,220 RSU grant remains outstanding and will vest on its future vesting date.

What RSU grant did Tandem Diabetes Care (TNDM) award to Rebecca B. Robertson in May 2026?

On May 20, 2026, Tandem Diabetes Care granted Rebecca B. Robertson 10,220 restricted stock units under its 2023 Long-Term Incentive Plan. According to the filing, these RSUs will vest on the one-year anniversary of the grant date, subject to the plan’s terms and conditions.

What happened to the 8,759 RSUs previously granted to Tandem Diabetes (TNDM) director Rebecca Robertson?

The 8,759 RSUs granted to Rebecca Robertson on May 21, 2025 fully vested on their one-year anniversary. Upon vesting, they converted into 8,759 shares of Tandem Diabetes common stock, increasing her direct equity holdings as disclosed in the Form 4 insider transaction report.

Under which plan were Rebecca B. Robertson’s Tandem Diabetes (TNDM) RSUs granted?

Rebecca B. Robertson’s restricted stock units were granted under Tandem Diabetes Care’s 2023 Long-Term Incentive Plan. The filing notes that each RSU represents a contingent right to receive either one share of common stock or cash, at the company’s discretion, in accordance with that plan.