Tandem Diabetes Care (TNDM) insider buying
8 open-market purchases of TNDM by Tandem Diabetes Care's executives and directors since August 2025, worth $251,711 in total, from SEC Form 4 filings.
The most recent: Gilbert Ray Cisneros, Jr. bought — on March 3, 2026.
The biggest buyer over the period is Leigh Vosseller: 1 purchase, $149,411.
By year
| Year | Purchases | Value |
|---|---|---|
| 2026 | 3 | $0 |
| 2025 | 5 | $251,711 |
Biggest buyers
| Insider | Buys | Value |
|---|---|---|
| Leigh Vosseller | 1 | $149,411 |
| John F Sheridan | 1 | $102,300 |
| Gilbert Ray Cisneros, Jr. | 3 | $0 |
| Josh Gottheimer | 3 | $0 |
Every purchase
Newest first. From SEC Form 4 filings. Insider buying across the market.
| Date | Insider | Shares | Price | Value | Filing |
|---|---|---|---|---|---|
| Mar 3, 2026 | Gilbert Ray Cisneros, Jr. |
0 | $23.74 | — | — |
| Mar 3, 2026 | Gilbert Ray Cisneros, Jr. |
0 | $23.74 | — | — |
| Mar 3, 2026 | Gilbert Ray Cisneros, Jr. |
0 | $23.74 | — | — |
| Sep 22, 2025 | Josh Gottheimer |
0 | $13.06 | — | — |
| Sep 22, 2025 | Josh Gottheimer |
0 | $13.06 | — | — |
| Sep 22, 2025 | Josh Gottheimer |
0 | $13.06 | — | — |
| Aug 11, 2025 | John F Sheridan |
10,000 | $10.23 | $102,300 | Form 4 |
| Aug 8, 2025 | Leigh Vosseller |
13,720 | $10.89 | $149,411 | Form 4 |
Questions
Are Tandem Diabetes Care insiders buying the stock?
8 open-market purchases of TNDM by Tandem Diabetes Care's executives and directors since August 2025, worth $251,711 in total, from SEC Form 4 filings. The most recent: Gilbert Ray Cisneros, Jr. bought — on March 3, 2026.
What counts as insider buying here?
Open-market purchases (Form 4 code P) by officers and directors. Option exercises, grants and purchases by 10% owners are left out.
From Tandem Diabetes Care's annual reports filed with the SEC (XBRL data), standardised by Investingly. Information only, not investment advice.