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Tandem Diabetes Care Inc (NASDAQ:TNDM)
US · Delayed Price · Currency is USD
Healthcare · Medical - Devices
18.90+1.47 (+8.43%)
Insider Score
––Not scored
TNDM Insider Score
Insiders here have filed 28 Form 4s in the last 90 days, but all of them are share awards, grants or other non-market transactions. Those are compensation, not a decision to buy, so they are not scored.
TNDM Stock Insider Trading Activity
TNDM stock’s insider trading shows no open-market insider trades by company insiders over the last 6 months.
Not enough price history.
Insider Trading Activity (Form 4 Filings)
An insider trade occurs when an individual that has non-public information about a company buys or sells shares of that company’s stock. Examples of insiders include a company’s executive officers (CEO, CFO, COO), its board of directors, and its major shareholders. Insiders are required to submit their trading activity to the SEC through Form 4 filings.
| Insider | Action | Shares | Avg Cost | Total | Δ Holdings | Held After | Date | Grade | Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| Kyrillos Jean-Claude COO | Tax withheld | 1,926 | $16.52 | $31.82K | 5.7% | 32,001 | Oct 15, 2026 | — | Form 4 |
| Kyrillos Jean-Claude COO | Option exercise | 3,637 | — | — | 12.0% | 33,927 | Oct 15, 2026 | — | Form 4 |
| Gasser Elizabeth Anne Other | Option exercise | 1,097 | — | — | New | 1,097 | Aug 15, 2026 | — | Form 4 |
| Gasser Elizabeth Anne Other | Tax withheld | 589 | $22.72 | $13.38K | 53.7% | 508 | Aug 15, 2026 | — | Form 4 |
| Gasser Elizabeth Anne Other | Option exercise | 1,917 | — | — | 377% | 2,425 | Aug 15, 2026 | — | Form 4 |
| Gasser Elizabeth Anne Other | Tax withheld | 1,029 | $22.72 | $23.38K | 42.4% | 1,396 | Aug 15, 2026 | — | Form 4 |
| Carpenter Rick Other | Option exercise | 897 | — | — | 2.9% | 31,815 | Aug 15, 2026 | — | Form 4 |
| Carpenter Rick Other | Tax withheld | 457 | $22.72 | $10.38K | 1.4% | 31,358 | Aug 15, 2026 | — | Form 4 |
| Carpenter Rick Other | Option exercise | 1,610 | — | — | 5.1% | 32,968 | Aug 15, 2026 | — | Form 4 |
| Carpenter Rick Other | Tax withheld | 820 | $22.72 | $18.63K | 2.5% | 32,148 | Aug 15, 2026 | — | Form 4 |
| Hansen Shannon Marie Other | Option exercise | 1,097 | — | — | 3.6% | 31,268 | Aug 15, 2026 | — | Form 4 |
| Hansen Shannon Marie Other | Tax withheld | 559 | $22.72 | $12.70K | 1.8% | 30,709 | Aug 15, 2026 | — | Form 4 |
| Hansen Shannon Marie Other | Option exercise | 1,917 | — | — | 6.2% | 32,626 | Aug 15, 2026 | — | Form 4 |
| Vosseller Leigh CFO | Option exercise | 1,496 | — | — | 3.0% | 50,895 | Aug 15, 2026 | — | Form 4 |
| Hansen Shannon Marie Other | Tax withheld | 976 | $22.72 | $22.17K | 3.0% | 31,650 | Aug 15, 2026 | — | Form 4 |
| Kyrillos Jean-Claude COO | Option exercise | 1,010 | — | — | 3.4% | 30,825 | Aug 15, 2026 | — | Form 4 |
| Morrison Susan Other | Tax withheld | 495 | $22.72 | $11.25K | 0.9% | 52,788 | Aug 15, 2026 | — | Form 4 |
| Morrison Susan Other | Option exercise | 1,730 | — | — | 3.4% | 53,283 | Aug 15, 2026 | — | Form 4 |
| Morrison Susan Other | Tax withheld | 314 | $22.72 | $7.13K | 0.6% | 51,553 | Aug 15, 2026 | — | Form 4 |
| Morrison Susan Other | Option exercise | 1,097 | — | — | 2.2% | 51,867 | Aug 15, 2026 | — | Form 4 |
| Sheridan John F CEO | Tax withheld | 5,055 | $22.72 | $114.85K | 3.1% | 160,260 | Aug 15, 2026 | — | Form 4 |
| Sheridan John F CEO | Option exercise | 9,934 | — | — | 6.4% | 165,315 | Aug 15, 2026 | — | Form 4 |
| Sheridan John F CEO | Tax withheld | 3,044 | $22.72 | $69.16K | 1.9% | 155,381 | Aug 15, 2026 | — | Form 4 |
| Sheridan John F CEO | Option exercise | 5,982 | — | — | 3.9% | 158,425 | Aug 15, 2026 | — | Form 4 |
| Vosseller Leigh CFO | Tax withheld | 942 | $22.72 | $21.40K | 1.8% | 52,040 | Aug 15, 2026 | — | Form 4 |
| Vosseller Leigh CFO | Option exercise | 2,624 | — | — | 5.2% | 52,982 | Aug 15, 2026 | — | Form 4 |
| Vosseller Leigh CFO | Tax withheld | 537 | $22.72 | $12.20K | 1.1% | 50,358 | Aug 15, 2026 | — | Form 4 |
| Kyrillos Jean-Claude COO | Tax withheld | 535 | $22.72 | $12.16K | 1.7% | 30,290 | Aug 15, 2026 | — | Form 4 |
What these mean— the action is the SEC’s own Form 4 transaction code. Only a buy or a sell is an open-market trade; the rest are transfers, awards and exercises, which is why they carry no price.
- Tax withheld (F) — Shares withheld to pay tax or an exercise price
- Option exercise (M) — Exercise or conversion of an exempt derivative
Disclaimer — Informational only — not investment advice. Insider transaction data is sourced from SEC Form 4 filings; market data from public feeds and may be delayed. The Insider Score is a proprietary score for research purposes and does not predict future performance. Always do your own research.