Sheridan John F (CIK 1365369) reported 39 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-05-19). Recent activity: Buy TNDM (5,472 shares), Sell TNDM (2,785 shares), Buy TNDM (5,982 shares), Sell TNDM (3,044 shares), Buy TNDM (39,735 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-19 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Buy | 5,472 | $0 |
| 2026-05-19 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Sell | 2,785 | $35,704 |
| 2026-05-19 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Buy | 5,982 | $0 |
| 2026-05-19 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Sell | 3,044 | $39,024 |
| 2026-05-19 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Buy | 39,735 | $0 |
| 2026-05-19 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Sell | 18,944 | $242,862 |
| 2026-05-19 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Buy | 1,336 | $14,562 |
| 2026-02-19 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Buy | 5,471 | $0 |
| 2026-02-19 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Sell | 1,963 | $37,199 |
| 2026-02-19 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Buy | 5,983 | $0 |
| 2026-02-19 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Sell | 2,400 | $45,480 |
| 2025-11-19 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Sell | 2,779 | $51,717 |
| 2025-11-19 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Buy | 5,472 | $0 |
| 2025-11-19 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Buy | 5,982 | $0 |
| 2025-11-19 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Sell | 3,038 | $56,537 |
| 2025-08-19 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Buy | 5,471 | $0 |
| 2025-08-19 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Sell | 2,779 | $30,069 |
| 2025-08-19 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Buy | 5,982 | $0 |
| 2025-08-19 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Sell | 3,038 | $32,871 |
| 2025-08-11 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Buy | 10,000 | $102,300 |
| 2025-05-19 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Buy | 1,359 | $21,255 |
| 2025-05-19 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Buy | 792 | $0 |
| 2025-05-19 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Sell | 403 | $9,148 |
| 2025-05-19 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Buy | 2,236 | $0 |
| 2025-05-19 | TANDEM DIABETES CARE INC (TNDM) | PRESIDENT & CEO | Sell | 1,136 | $25,787 |
Source: SEC Form 4 filings · as of 2026-05-19