Tandem Diabetes Care Inc (TNDM) insider trading
Every open-market stock purchase and sale by Tandem Diabetes Care Inc executives, directors, large shareholders and members of Congress, from SEC Form 4 filings. Sector: Other.
Insider activity at a glance
- Christopher J Twomey (Board member) sold $32.6K in the last 90 days.
- Last company insider buy: John F Sheridan (CEO), $102K, 15 months ago.
- Congress: Gilbert Cisneros bought $1K to $15K, 5 weeks ago.
Last 12 months: insiders bought $0 (0 buys) and sold $36.9K (3 sales). Last close $19.11 on Oct 30, 2026.
Recent TNDM insider trades
| Date | Insider | Trade | Value |
|---|---|---|---|
| Oct 27, 2026 | Christopher J Twomey (Director) | Sold | $32.6K |
| Oct 27, 2026 | Christopher J Twomey (Director) | Bought (not open market) | $32.3K |
| Oct 27, 2026 | Christopher J Twomey (Director) | Bought (not open market) | — |
| Oct 15, 2026 | Jean-Claude Kyrillos (COO) | Sold (not open market) | $31.8K |
| Oct 15, 2026 | Jean-Claude Kyrillos (COO) | Bought (not open market) | — |
| Oct 15, 2026 | Jean-Claude Kyrillos (COO) | Bought (not open market) | — |
| Sep 29, 2026 | Gilbert Cisneros (Representative) | Bought | $1K–15K |
| Aug 15, 2026 | John F Sheridan (CEO) | Sold (not open market) | $115K |
| Aug 15, 2026 | John F Sheridan (CEO) | Sold (not open market) | $69.2K |
| Aug 15, 2026 | Elizabeth Anne Gasser (C-suite exec) | Sold (not open market) | $23.4K |
| Aug 15, 2026 | Shannon Marie Hansen (C-suite exec) | Sold (not open market) | $22.2K |
| Aug 15, 2026 | Leigh Vosseller (CFO) | Sold (not open market) | $21.4K |
| Aug 15, 2026 | Rick Carpenter (CTO) | Sold (not open market) | $18.6K |
| Aug 15, 2026 | Elizabeth Anne Gasser (C-suite exec) | Sold (not open market) | $13.4K |
| Aug 15, 2026 | Shannon Marie Hansen (C-suite exec) | Sold (not open market) | $12.7K |
| Aug 15, 2026 | Leigh Vosseller (CFO) | Sold (not open market) | $12.2K |
| Aug 15, 2026 | Jean-Claude Kyrillos (COO) | Sold (not open market) | $12.2K |
| Aug 15, 2026 | Susan Morrison (VP) | Sold (not open market) | $11.2K |
| Aug 15, 2026 | Rick Carpenter (CTO) | Sold (not open market) | $10.4K |
| Aug 15, 2026 | Susan Morrison (VP) | Sold (not open market) | $7.1K |
| Aug 15, 2026 | Shannon Marie Hansen (C-suite exec) | Bought (not open market) | — |
| Aug 15, 2026 | Jean-Claude Kyrillos (COO) | Bought (not open market) | — |
| Aug 15, 2026 | Rick Carpenter (CTO) | Bought (not open market) | — |
| Aug 15, 2026 | Leigh Vosseller (CFO) | Bought (not open market) | — |
| Aug 15, 2026 | Susan Morrison (VP) | Bought (not open market) | — |
Who's trading TNDM
- Christopher J Twomey, Director: sold $32.6K (1 sale), last Oct 27, 2026
- Jean-Claude Kyrillos, COO: other filings, last Oct 15, 2026
- Gilbert Cisneros, Representative: bought $16K (2 buys), last Sep 29, 2026
- Leigh Vosseller, CFO: other filings, last Aug 15, 2026
- Elizabeth Anne Gasser, C-suite exec: other filings, last Aug 15, 2026
- Shannon Marie Hansen, C-suite exec: other filings, last Aug 15, 2026
- Susan Morrison, VP: other filings, last Aug 15, 2026
- John F Sheridan, CEO: other filings, last Aug 15, 2026
- Rick Carpenter, CTO: other filings, last Aug 15, 2026
- Dick Allen, Director: other filings, last May 21, 2026
- Myoungil Cha, Director: other filings, last May 21, 2026
- Peyton R Howell, Director: other filings, last May 21, 2026
- Joao Paulo Falcao Malagueira, Director: other filings, last May 21, 2026
- Kathleen McGroddy-Goetz, Director: other filings, last May 21, 2026
- Rebecca B Robertson, Director: other filings, last May 21, 2026
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