Tandem Diabetes Care Inc. (TNDM)
Tandem Diabetes Care Inc. (TNDM) Insider Trading
Directors, officers and holders of more than 10% of TNDM report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.
Recent Form 4 transactions
The 50 most recent of 588 transactions on file: 0 with code P, 1 with code S and 49 with other codes.
| Date | Insider | Title | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 27, 2026 | TWOMEY CHRISTOPHER J | Director | M Exercise | 1,700 | $19.00 | $32,300 |
| Oct 27, 2026 | TWOMEY CHRISTOPHER J | Director | M Exercise | 1,700 | Not measured | Not measured |
| Oct 27, 2026 | TWOMEY CHRISTOPHER J | Director | S Sale | 1,700 | $19.15 | $32,555 |
| Oct 15, 2026 | Kyrillos Jean-Claude | EVP & Chief Operating Officer | M Exercise | 3,637 | Not measured | Not measured |
| Oct 15, 2026 | Kyrillos Jean-Claude | EVP & Chief Operating Officer | F Tax Payment | 1,926 | $16.52 | $31,818 |
| Oct 15, 2026 | Kyrillos Jean-Claude | EVP & Chief Operating Officer | M Exercise | 3,637 | Not measured | Not measured |
| Aug 15, 2026 | Vosseller Leigh | EVP & CHIEF FINANCIAL OFFICER | M Exercise | 2,624 | Not measured | Not measured |
| Aug 15, 2026 | Hansen Shannon Marie | EVP & Chief Legal Officer | M Exercise | 1,917 | Not measured | Not measured |
| Aug 15, 2026 | Morrison Susan | EVP & Chief Admin. Officer | M Exercise | 1,730 | Not measured | Not measured |
| Aug 15, 2026 | Gasser Elizabeth Anne | EVP, Chief Strategy Officer | M Exercise | 1,097 | Not measured | Not measured |
| Aug 15, 2026 | Sheridan John F | PRESIDENT & CEO | M Exercise | 5,982 | Not measured | Not measured |
| Aug 15, 2026 | Hansen Shannon Marie | EVP & Chief Legal Officer | F Tax Payment | 976 | $22.72 | $22,175 |
| Aug 15, 2026 | Carpenter Rick | EVP & Chief Technology Officer | M Exercise | 1,610 | Not measured | Not measured |
| Aug 15, 2026 | Hansen Shannon Marie | EVP & Chief Legal Officer | M Exercise | 1,097 | Not measured | Not measured |
| Aug 15, 2026 | Gasser Elizabeth Anne | EVP, Chief Strategy Officer | M Exercise | 1,917 | Not measured | Not measured |
| Aug 15, 2026 | Sheridan John F | PRESIDENT & CEO | M Exercise | 5,982 | Not measured | Not measured |
| Aug 15, 2026 | Gasser Elizabeth Anne | EVP, Chief Strategy Officer | F Tax Payment | 1,029 | $22.72 | $23,379 |
| Aug 15, 2026 | Sheridan John F | PRESIDENT & CEO | F Tax Payment | 3,044 | $22.72 | $69,160 |
| Aug 15, 2026 | Sheridan John F | PRESIDENT & CEO | F Tax Payment | 5,055 | $22.72 | $114,850 |
| Aug 15, 2026 | Vosseller Leigh | EVP & CHIEF FINANCIAL OFFICER | F Tax Payment | 537 | $22.72 | $12,201 |
| Aug 15, 2026 | Morrison Susan | EVP & Chief Admin. Officer | M Exercise | 1,097 | Not measured | Not measured |
| Aug 15, 2026 | Morrison Susan | EVP & Chief Admin. Officer | F Tax Payment | 495 | $22.72 | $11,246 |
| Aug 15, 2026 | Hansen Shannon Marie | EVP & Chief Legal Officer | M Exercise | 1,097 | Not measured | Not measured |
| Aug 15, 2026 | Vosseller Leigh | EVP & CHIEF FINANCIAL OFFICER | M Exercise | 1,496 | Not measured | Not measured |
| Aug 15, 2026 | Hansen Shannon Marie | EVP & Chief Legal Officer | F Tax Payment | 559 | $22.72 | $12,700 |
| Aug 15, 2026 | Hansen Shannon Marie | EVP & Chief Legal Officer | M Exercise | 1,917 | Not measured | Not measured |
| Aug 15, 2026 | Carpenter Rick | EVP & Chief Technology Officer | F Tax Payment | 820 | $22.72 | $18,630 |
| Aug 15, 2026 | Gasser Elizabeth Anne | EVP, Chief Strategy Officer | M Exercise | 1,097 | Not measured | Not measured |
| Aug 15, 2026 | Morrison Susan | EVP & Chief Admin. Officer | M Exercise | 1,097 | Not measured | Not measured |
| Aug 15, 2026 | Morrison Susan | EVP & Chief Admin. Officer | M Exercise | 1,730 | Not measured | Not measured |
| Aug 15, 2026 | Carpenter Rick | EVP & Chief Technology Officer | M Exercise | 897 | Not measured | Not measured |
| Aug 15, 2026 | Sheridan John F | PRESIDENT & CEO | M Exercise | 9,934 | Not measured | Not measured |
| Aug 15, 2026 | Carpenter Rick | EVP & Chief Technology Officer | F Tax Payment | 457 | $22.72 | $10,383 |
| Aug 15, 2026 | Carpenter Rick | EVP & Chief Technology Officer | M Exercise | 1,610 | Not measured | Not measured |
| Aug 15, 2026 | Gasser Elizabeth Anne | EVP, Chief Strategy Officer | F Tax Payment | 589 | $22.72 | $13,382 |
| Aug 15, 2026 | Gasser Elizabeth Anne | EVP, Chief Strategy Officer | M Exercise | 1,917 | Not measured | Not measured |
| Aug 15, 2026 | Kyrillos Jean-Claude | EVP & Chief Operating Officer | M Exercise | 1,010 | Not measured | Not measured |
| Aug 15, 2026 | Kyrillos Jean-Claude | EVP & Chief Operating Officer | F Tax Payment | 535 | $22.72 | $12,155 |
| Aug 15, 2026 | Carpenter Rick | EVP & Chief Technology Officer | M Exercise | 897 | Not measured | Not measured |
| Aug 15, 2026 | Vosseller Leigh | EVP & CHIEF FINANCIAL OFFICER | M Exercise | 2,624 | Not measured | Not measured |
| Aug 15, 2026 | Vosseller Leigh | EVP & CHIEF FINANCIAL OFFICER | M Exercise | 1,496 | Not measured | Not measured |
| Aug 15, 2026 | Kyrillos Jean-Claude | EVP & Chief Operating Officer | M Exercise | 1,010 | Not measured | Not measured |
| Aug 15, 2026 | Vosseller Leigh | EVP & CHIEF FINANCIAL OFFICER | F Tax Payment | 942 | $22.72 | $21,402 |
| Aug 15, 2026 | Sheridan John F | PRESIDENT & CEO | M Exercise | 9,934 | Not measured | Not measured |
| Aug 15, 2026 | Morrison Susan | EVP & Chief Admin. Officer | F Tax Payment | 314 | $22.72 | $7,134 |
| Jul 15, 2026 | Kyrillos Jean-Claude | EVP & Chief Operating Officer | M Exercise | 3,636 | Not measured | Not measured |
| Jul 15, 2026 | Kyrillos Jean-Claude | EVP & Chief Operating Officer | M Exercise | 3,636 | Not measured | Not measured |
| Jul 15, 2026 | Kyrillos Jean-Claude | EVP & Chief Operating Officer | F Tax Payment | 1,926 | $15.28 | $29,429 |
| Jun 2, 2026 | Gasser Elizabeth Anne | EVP, Chief Strategy Officer | G Gift | 7,160 | Not measured | Not measured |
| Jun 2, 2026 | Gasser Elizabeth Anne | EVP, Chief Strategy Officer | G Gift | 7,160 | Not measured | Not measured |
The full Form 4 history is on the TNDM company page (Insider Trades card, View all).
Questions about this data
Which insider transactions are open-market trades?
Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.
How quickly are insider trades reported?
A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.
Who has to file Form 4?
Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.
Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.