TNDM (Tandem Diabetes Care, Inc.)
Insider Trading Activity
Every open-market purchase and sale reported by TNDM officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-18 | Jean-Claude Kyrillos | EVP & Chief Operating Officer | MIXED | — | — |
| 2026-08-18 | Rick Carpenter | EVP & Chief Technology Officer | MIXED | — | — |
| 2026-08-18 | Elizabeth Anne Gasser | EVP, Chief Strategy Officer | MIXED | — | — |
| 2026-08-18 | Leigh Vosseller | EVP & CHIEF FINANCIAL OFFICER | MIXED | — | — |
| 2026-08-18 | John F Sheridan | PRESIDENT & CEO | MIXED | — | — |
| 2026-08-18 | Shannon Marie Hansen | EVP & Chief Legal Officer | MIXED | — | — |
| 2026-08-18 | Susan Morrison | EVP & Chief Admin. Officer | MIXED | — | — |
| 2026-07-17 | Jean-Claude Kyrillos | EVP & Chief Operating Officer | MIXED | — | — |
| 2026-06-04 | Elizabeth Anne Gasser | EVP, Chief Strategy Officer | G | — | — |
| 2026-06-02 | John F Sheridan | PRESIDENT & CEO | A | — | — |
| 2026-06-02 | Rick Carpenter | EVP & Chief Technology Officer | A | — | — |
| 2026-06-02 | Jean-Claude Kyrillos | EVP & Chief Operating Officer | A | — | — |
| 2026-06-02 | Susan Morrison | EVP & Chief Admin. Officer | A | — | — |
| 2026-06-02 | Elizabeth Anne Gasser | EVP, Chief Strategy Officer | A | — | — |
| 2026-06-02 | Shannon Marie Hansen | EVP & Chief Legal Officer | A | — | — |
| 2026-06-02 | Leigh Vosseller | EVP & CHIEF FINANCIAL OFFICER | A | — | — |
| 2026-05-22 | REBECCA B ROBERTSON | Director | M | — | — |
| 2026-05-22 | Sandra Beaver | Director | A | — | — |
| 2026-05-22 | Joao Paulo Falcao Malagueira | Director | M | — | — |
| 2026-05-22 | Myoungil Cha | Director | M | — | — |
| 2026-05-22 | CHRISTOPHER J TWOMEY | Director | M | — | — |
| 2026-05-22 | Peyton R Howell | Director | M | — | — |
| 2026-05-22 | Kathleen McGroddy-Goetz | Director | M | — | — |
| 2026-05-22 | Dick Allen | — | M | — | — |
| 2026-05-22 | Rajwant Sodhi | Director | M | — | — |
| 2026-05-19 | Jean-Claude Kyrillos | EVP & Chief Operating Officer | MIXED | — | — |
| 2026-05-19 | Mark David Novara | EVP & CHIEF COMMERCIAL OFFICER | MIXED | — | — |
| 2026-05-19 | Elizabeth Anne Gasser | EVP, Chief Strategy Officer | MIXED | — | — |
| 2026-05-19 | Shannon Marie Hansen | EVP & Chief Legal Officer | MIXED | — | — |
| 2026-05-19 | Susan Morrison | EVP & Chief Admin. Officer | MIXED | — | — |
| 2026-05-19 | Rick Carpenter | EVP & Chief Technology Officer | MIXED | — | — |
| 2026-05-19 | John F Sheridan | PRESIDENT & CEO | MIXED | — | — |
| 2026-05-19 | Leigh Vosseller | EVP & CHIEF FINANCIAL OFFICER | MIXED | — | — |
| 2026-04-17 | Jean-Claude Kyrillos | EVP & Chief Operating Officer | MIXED | — | — |
| 2026-03-18 | Mark David Novara | EVP & CHIEF COMMERCIAL OFFICER | MIXED | — | — |
| 2026-03-09 | Mark David Novara | EVP & CHIEF COMMERCIAL OFFICER | Sell | — | — |
| 2026-02-19 | Mark David Novara | EVP & CHIEF COMMERCIAL OFFICER | MIXED | — | — |
| 2026-02-19 | Rick Carpenter | Chief Technology Officer | MIXED | — | — |
| 2026-02-19 | Elizabeth Anne Gasser | EVP, Chief Strategy Officer | MIXED | — | — |
| 2026-02-19 | Susan Morrison | EVP & Chief Admin. Officer | MIXED | — | — |
| 2026-02-19 | Leigh Vosseller | EVP & CHIEF FINANCIAL OFFICER | MIXED | — | — |
| 2026-02-19 | John F Sheridan | PRESIDENT & CEO | MIXED | — | — |
| 2026-02-19 | Shannon Marie Hansen | EVP & Chief Legal Officer | MIXED | — | — |
| 2026-01-20 | Jean-Claude Kyrillos | EVP & Chief Operating Officer | MIXED | — | — |
| 2025-12-17 | Mark David Novara | EVP & CHIEF COMMERCIAL OFFICER | MIXED | — | — |
| 2025-12-17 | Rick Carpenter | Chief Technology Officer | MIXED | — | — |
| 2025-12-08 | Elizabeth Anne Gasser | EVP, Chief Strategy Officer | J | — | — |
| 2025-11-25 | Sandra Beaver | Director | A | — | — |
| 2025-11-19 | Jean-Claude Kyrillos | EVP & Chief Operating Officer | A | — | — |
| 2025-11-19 | Mark David Novara | EVP & CHIEF COMMERCIAL OFFICER | MIXED | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | 10%+ Owner | 318,906 | — |
| — | 10%+ Owner | 318,906 | — |
| — | 10%+ Owner | 318,906 | — |
| — | 10%+ Owner | 318,906 | — |
| — | 10%+ Owner | 318,906 | — |
| — | Director | 318,906 | — |
| — | 10%+ Owner | 318,906 | — |
| — | 10%+ Owner | 249,619 | — |
| — | Director | 213,038 | — |
| — | PRESIDENT & CEO | 160,260 | — |
| — | 10%+ Owner | 145,406 | — |
| — | EVP & CHIEF FINANCIAL OFFICER | 78,562 | — |
| — | EVP & Chief Admin. Officer | 52,788 | — |
| — | Director | 50,903 | — |
| — | EVP & CHIEF COMMERCIAL OFFICER | 40,317 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the TNDM quote page; the site-wide leaderboard is on the insider transactions hub.