Tandem Diabetes Care (TNDM) director Robertson acquired 8,759 shares
Insider transactions reported
Rebecca B Robertson (director at Tandem Diabetes Care Inc., TNDM) reported that they acquired 8,759 shares between May 20, 2026 and May 21, 2026. After these transactions the filing shows 22,542 shares held directly.
- Reporting person
- Robertson Rebecca B
| Date | Type | Security | Shares | Price | Value | Held after |
|---|---|---|---|---|---|---|
| May 21, 2026 | Exercise or conversion of a derivative (M) | Common Stock | +8,759 | - | - | 22,542 direct |
Options and other derivatives
| Date | Type | Security | Shares | Price | Value | Held after |
|---|---|---|---|---|---|---|
| May 20, 2026 | Grant or award (A) | Restricted Stock UnitOn 10,220 Common Stock1, 2 | +10,220 | - | - | 10,220 direct |
| May 21, 2026 | Exercise or conversion of a derivative (M) | Restricted Stock UnitOn 8,759 Common Stock1, 3 | -8,759 | - | - | 0 direct |
Holdings before and after
- Common Stock: 13,783 to 22,542 direct
Footnotes from the filing
- 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.
Transaction codes in this filing
- Exercise or conversion of a derivative:
- Code M marks the exercise or conversion of an option or other derivative under an exempt plan.
FAQ
What did Robertson report in this TNDM Form 4?
Rebecca B Robertson (director at Tandem Diabetes Care Inc., TNDM) reported that they acquired 8,759 shares between May 20, 2026 and May 21, 2026. After these transactions the filing shows 22,542 shares held directly.
How many TNDM shares does Robertson hold after this filing?
The filing shows 22,542 shares held directly after the reported transactions. Form 4 reports only the positions it lists, so this may not be every holding.
What does transaction code M mean on an SEC Form 4?
Code M marks the exercise or conversion of an option or other derivative under an exempt plan.
Historical context for TNDM
Across the 24 sessions after earlier TNDM headlines, the stock closed higher 14 times and lower 10 times, with a median move of 3.2% in either direction. This shows timing only: many things move a stock in a session, and these figures do not show that any headline caused a move.
| Session | Earlier headline | TNDM | SPY |
|---|---|---|---|
| May 12, 2026 | The Benchmark Company initiated coverage on Tandem Diabetes Care | -0.5% | -0.2% |
| May 8, 2026 | Tandem Diabetes Care Announces First Quarter 2026 Financial Results | -16.2% | +0.8% |
| Apr 30, 2026 | Tandem Diabetes Care Announces Upcoming Conference Presentations | +7.5% | +1.0% |
| Apr 27, 2026 | Tandem Diabetes Care's Control-IQ+ Automated Insulin Delivery Technology Now FDA Cleared for Pregnancy in Type 1 Diabetes | -2.7% | +0.2% |
| Apr 6, 2026 | Tandem Diabetes Care to Announce First Quarter 2026 Financial Results on May 7, 2026 | +3.0% | +0.5% |
| Mar 19, 2026 | Tandem Diabetes Care upgraded by Truist with a new price target | +3.3% | -0.2% |
Earlier insider filings at TNDM
- May 22, 2026Director Twomey Christopher J converted options into 8,759 shares, increasing direct ownership by 56% to 24,434 units (SEC Form 4)
- May 22, 2026Director Cha Myoungil converted options into 8,759 shares, increasing direct ownership by 64% to 22,458 units (SEC Form 4)
- May 19, 2026EVP & Chief Technology Officer Carpenter Rick was granted 1,336 shares, converted options into 8,774 shares and covered exercise/tax liability with 4,466 shares, increasing direct ownership by 22% to 30,918 units (SEC Form 4) (tax liability)
- May 19, 2026EVP, Chief Strategy Officer Gasser Elizabeth Anne converted options into 10,267 shares, covered exercise/tax liability with 5,510 shares and was granted 1,337 shares, increasing direct ownership by 572% to 7,160 units (SEC Form 4) (tax withholding)
- May 19, 2026EVP & Chief Legal Officer Hansen Shannon Marie converted options into 10,201 shares, covered exercise/tax liability with 5,192 shares and was granted 1,886 shares, increasing direct ownership by 30% to 30,171 units (SEC Form 4) (for withholding tax)
- Market cap
- 30-day
- Sector
- Health Care
- Industry
- Medical/Dental Instruments
- Listed since
- 2013
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