TNDM insider trading — Tandem Diabetes Care Inc
No open-market insider purchases or sales were filed for Tandem Diabetes Care Inc (TNDM) in the last 90 days. Other insider transactions — such as stock awards, option exercises or tax withholding — are listed below.
Updated Oct 16, 2026.
Recent TNDM insider transactions
Every Form 4 filed by Tandem Diabetes Care Inc officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Aug 15, 2026 | Sheridan John F | PRESIDENT & CEO | M · Option exercise | Direct | 15,916 | — | — | Form 4 |
| Aug 15, 2026 | Sheridan John F | PRESIDENT & CEO | F · Tax withholding | Direct | 8,099 | $22.72 | $184K | Form 4 |
| Aug 15, 2026 | Morrison Susan | EVP & Chief Admin. Officer | M · Option exercise | Direct | 2,827 | — | — | Form 4 |
| Aug 15, 2026 | Morrison Susan | EVP & Chief Admin. Officer | F · Tax withholding | Direct | 809 | $22.72 | $18K | Form 4 |
| Aug 15, 2026 | Vosseller Leigh | EVP & CHIEF FINANCIAL OFFICER | M · Option exercise | Direct | 4,120 | — | — | Form 4 |
| Aug 15, 2026 | Vosseller Leigh | EVP & CHIEF FINANCIAL OFFICER | F · Tax withholding | Direct | 1,479 | $22.72 | $34K | Form 4 |
| Aug 15, 2026 | Gasser Elizabeth Anne | EVP, Chief Strategy Officer | M · Option exercise | Direct | 3,014 | — | — | Form 4 |
| Aug 15, 2026 | Gasser Elizabeth Anne | EVP, Chief Strategy Officer | F · Tax withholding | Direct | 1,618 | $22.72 | $37K | Form 4 |
| Aug 15, 2026 | Carpenter Rick | EVP & Chief Technology Officer | M · Option exercise | Direct | 2,507 | — | — | Form 4 |
| Aug 15, 2026 | Carpenter Rick | EVP & Chief Technology Officer | F · Tax withholding | Direct | 1,277 | $22.72 | $29K | Form 4 |
| Aug 15, 2026 | Kyrillos Jean-Claude | EVP & Chief Operating Officer | M · Option exercise | Direct | 1,010 | — | — | Form 4 |
| Aug 15, 2026 | Kyrillos Jean-Claude | EVP & Chief Operating Officer | F · Tax withholding | Direct | 535 | $22.72 | $12K | Form 4 |
| Aug 15, 2026 | Hansen Shannon Marie | EVP & Chief Legal Officer | M · Option exercise | Direct | 3,014 | — | — | Form 4 |
| Aug 15, 2026 | Hansen Shannon Marie | EVP & Chief Legal Officer | F · Tax withholding | Direct | 1,535 | $22.72 | $35K | Form 4 |
TNDM insider trading FAQ
Are insiders buying TNDM stock?
Not on the open market. In the last 90 days, Tandem Diabetes Care Inc insiders made no open-market purchases, and no open-market sales. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading TNDM?
No insider bought or sold on the open market in the last 90 days.
Where does TNDM insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.