Form 4 for TNDM TANDEM DIABETES CARE INC
Accepted 2026-08-18 16:26:50 ET · period of report 2026-08-15 · accession 0001438133-26-000126 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DM | 2026-08-18 16:26 | 2026-08-15 | TNDM | Hansen Shannon Marie | EVP, CLO | M - OptEx | $0.00 | +3,014 | 32.6K | +10% | $0 |
| DM | 2026-08-18 16:26 | 2026-08-15 | TNDM | Hansen Shannon Marie | EVP, CLO | F - Tax | $22.72 | -1,535 | 31.6K | -5% | -$34.9K |
| DM | 2026-08-18 16:26 | 2026-08-15 | TNDM | Hansen Shannon Marie | EVP, CLO | M - OptEx | $0.00 | -3,014 | 13.4K | -18% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-08-15 | M | A | 1,097 | $0.00 | 31,268 | D | — | — | |
| 2 | Common | Common Stock | 2026-08-15 | F | D | 559 | $22.72 | 30,709 | D | — | — | (F1) Shares withheld by the Issuer to satisfy tax withholding requirements upon the vesting of restricted stock units (RSUs). No shares were sold. |
| 3 | Common | Common Stock | 2026-08-15 | M | A | 1,917 | $0.00 | 32,626 | D | — | — | |
| 4 | Common | Common Stock | 2026-08-15 | F | D | 976 | $22.72 | 31,650 | D | — | — | (F1) Shares withheld by the Issuer to satisfy tax withholding requirements upon the vesting of restricted stock units (RSUs). No shares were sold. |
| 5 | Derivative | Restricted Stock Unit | 2026-08-15 | M | D | 1,097 | $0.00 | 3,290 | D | — · — to — | 1,097 Common Stock | (F3) Awarded on May 23, 2024 pursuant to the Tandem Diabetes Care Inc. 2023 Long-Term Incentive Plan, as amended, and agreements related thereto (the 2023 Plan). (F4) Each RSU represents a contingent right to receive either one share of common stock of the Issuer or cash in lieu thereof, at the Issuer's discretion, in accordance with the terms of the 2023 Plan. (F5) One-third of the RSUs granted on May 23, 2024 vested on May 15, 2025, with the remaining RSUs vesting in eight (8) equal quarterly installments thereafter, subject to the terms of the 2023 Plan. (F5) One-third of the RSUs granted on May 23, 2024 vested on May 15, 2025, with the remaining RSUs vesting in eight (8) equal quarterly installments thereafter, subject to the terms of the 2023 Plan. |
| 6 | Derivative | Restricted Stock Unit | 2026-08-15 | M | D | 1,917 | $0.00 | 13,418 | D | — · — to — | 1,917 Common Stock | (F6) Awarded on May 30, 2025 pursuant to the 2023 Plan. (F4) Each RSU represents a contingent right to receive either one share of common stock of the Issuer or cash in lieu thereof, at the Issuer's discretion, in accordance with the terms of the 2023 Plan. (F7) One-third of the RSUs granted on May 30, 2025 vested on May 15, 2026, with the remaining RSUs vesting in eight (8) equal quarterly installments thereafter, subject to the terms of the 2023 Plan. (F7) One-third of the RSUs granted on May 30, 2025 vested on May 15, 2026, with the remaining RSUs vesting in eight (8) equal quarterly installments thereafter, subject to the terms of the 2023 Plan. |