| $350M | ||
| $217M | ||
| $172M | ||
| $109M | ||
| $107M | ||
| $104M |
Buys | $0 | 0 | 0 |
Sells | $36,911 | 3 | 100 |
| Novara Mark David | EVP & CHIEF COMMERCIAL OFFICER | 0 | $0 | 2 | $4,356 | $-4,356 |
| TWOMEY CHRISTOPHER J | director | 0 | $0 | 1 | $32,555 | $-32,555 |
Tandem Diabetes Care, Inc., a medical technology firm, specializes in creating, developing, and marketing solutions for individuals globally who manage insulin-dependent diabetes. At the core of its offerings is the t:slim X2 insulin delivery system, an advanced pump platform that integrates the t:slim X2 pump, a disposable 300-unit insulin cartridge, and an infusion set. Tandem further enhances this platform with innovative features like Basal-IQ and Control-IQ technology, as well as G5 Integration capabilities. The company also provides the …
Over the last 12 months, insiders at Tandem Diabetes Care, Inc. have bought $0 and sold $36,911 worth of Tandem Diabetes Care, Inc. stock.
On average, over the past 5 years, insiders at Tandem Diabetes Care, Inc. have bought $365,501 and sold $4.31M worth of stock each year.
There was no buying activity among insiders over the last 12 months.
The last purchase of 10,000 shares for transaction amount of $102,318 was made by Sheridan John F (PRESIDENT & CEO) on 2025‑08‑11.
| 2026-10-27 | Sale | TWOMEY CHRISTOPHER J | director | 1,700 0.0024% | $19.15 | $32,555 | -0.57% | |
| 2026-03-17 | Sale | Novara Mark David | EVP & CHIEF COMMERCIAL OFFICER | 187 0.0003% | $23.05 | $4,310 | -25.16% | |
| 2026-03-05 | Sale | Novara Mark David | EVP & CHIEF COMMERCIAL OFFICER | 2 <0.0001% | $22.81 | $46 | -19.49% | |
| 2025-08-11 | Sheridan John F | PRESIDENT & CEO | 10,000 0.015% | $10.23 | $102,318 | +83.79% | ||
| 2025-08-08 | Vosseller Leigh | EVP & CHIEF FINANCIAL OFFICER | 13,720 0.0197% | $10.89 | $149,404 | +65.23% | ||
| 2025-03-07 | Kyrillos Jean-Claude | EVP & Chief Operating Officer | 10,538 0.0158% | $18.12 | $190,966 | +4.32% | ||
| 2024-11-21 | Sale | BLICKENSTAFF KIM D | director | 30,000 0.0465% | $31.38 | $941,400 | -39.05% | |
| 2024-11-20 | Sale | BLICKENSTAFF KIM D | director | 10,000 0.0151% | $30.00 | $300,000 | -37.86% | |
| 2024-11-15 | Novara Mark David | EVP & CHIEF COMMERCIAL OFFICER | 532 0.0007% | $23.24 | $12,364 | -30.91% | ||
| 2024-05-30 | Sale | Allen Dick | director | 5,000 0.0075% | $51.68 | $258,400 | -33.89% | |
| 2023-11-27 | Allen Dick | director | 5,000 0.0074% | $18.96 | $94,778 | +79.20% | ||
| 2023-11-08 | Vosseller Leigh | EVP & CHIEF FINANCIAL OFFICER | 6,200 0.0094% | $15.39 | $95,395 | +125.06% | ||
| 2023-11-08 | Hansen Shannon Marie | Chief Legal Officer | 1,935 0.003% | $15.44 | $29,884 | +125.06% | ||
| 2023-09-15 | McGroddy-Goetz Kathleen | director | 1,000 0.0015% | $21.45 | $21,450 | +41.47% | ||
| 2023-05-18 | Allen Dick | director | 10,000 0.0154% | $29.47 | $294,687 | -10.23% | ||
| 2023-05-17 | Howell Peyton R | director | 3,000 0.0046% | $30.16 | $90,492 | -12.50% | ||
| 2023-05-12 | Vosseller Leigh | EVP & CHIEF FINANCIAL OFFICER | 3,015 0.0046% | $32.77 | $98,805 | -19.34% | ||
| 2023-03-03 | Sale | BERGER DAVID B | EVP & Chief Operating Officer | 10,000 0.0153% | $41.19 | $411,884 | -36.11% | |
| 2022-12-16 | Sale | BERGER DAVID B | EVP & Chief Operating Officer | 10,000 0.0151% | $40.25 | $402,500 | -29.18% | |
| 2022-06-08 | Sale | BERGER DAVID B | EVP & Chief Operating Officer | 3,097 0.0048% | $65.00 | $201,305 | -35.37% |
| Novara Mark David | EVP & CHIEF COMMERCIAL OFFICER | 37656 0.0541% | $664,628.40 | 1 | 2 | <0.0001% |
| TWOMEY CHRISTOPHER J | director | 24434 0.0351% | $431,260.10 | 1 | 12 | +1234.89% |
| HLM VENTURE PARTNERS II, L.P. | 10 percent owner | 200000 0.2874% | $3.53M | 1 | 0 | <0.0001% |
| BLICKENSTAFF KIM D | director | 165190 0.2374% | $2.92M | 3 | 33 | +440.37% |
| Sheridan John F | PRESIDENT & CEO | 106327 0.1528% | $1.88M | 2 | 35 | +24.27% |
| GREENE HOWARD E JR | director | 30000 0.0431% | $529,500.00 | 1 | 4 | +1234.89% |
| Vosseller Leigh | EVP & CHIEF FINANCIAL OFFICER | 25580 0.0368% | $451,487.00 | 4 | 19 | +32.57% |
| Kyrillos Jean-Claude | EVP & Chief Operating Officer | 10538 0.0151% | $185,995.70 | 1 | 0 | +4.32% |
| ROEDER DOUGLAS A | director | 9670 0.0139% | $170,675.50 | 1 | 5 | +1234.89% |
| McGroddy-Goetz Kathleen | director | 9032 0.013% | $159,414.80 | 1 | 1 | +41.47% |
| Howell Peyton R | director | 8550 0.0123% | $150,907.50 | 2 | 0 | <0.0001% |
| BERGER DAVID B | EVP & Chief Operating Officer | 3365 0.0048% | $59,392.25 | 1 | 37 | <0.0001% |
| Valencia Richard P. | director | 3054 0.0044% | $53,903.10 | 2 | 0 | +52.21% |
| Hansen Shannon Marie | Chief Legal Officer | 1935 0.0028% | $34,152.75 | 1 | 0 | +125.06% |
| Allen Dick | director | 0 0% | $0 | 6 | 9 | +337.16% |
| Increased Positions | 143 | +47.67% | 14M | +18.83% |
| Decreased Positions | 135 | -45% | 13M | -17.13% |
| New Positions | 57 | New | 7M | New |
| Sold Out Positions | 35 | Sold Out | 5M | Sold Out |
| Total Postitions | 308 | +2.67% | 76M | +1.7% |
| Blackrock, Inc. | $260,787.00 | 17.8% | 12.1M | +1M | +11.31% | 2025-09-30 |
| Vanguard Group Inc | $152,214.00 | 10.39% | 7.06M | -306,516 | -4.16% | 2025-09-30 |
| Sessa Capital Im, L.P. | $107,750.00 | 7.35% | 5M | 0 | 0% | 2025-09-30 |
| Arrowmark Colorado Holdings Llc | $79,545.00 | 5.43% | 3.69M | +991,649 | +36.73% | 2025-09-30 |
| Gw&K Investment Management, Llc | $58,652.00 | 4% | 2.72M | -168,481 | -5.83% | 2025-09-30 |
| State Street Corp | $57,499.00 | 3.92% | 2.67M | +22,299 | +0.84% | 2025-09-30 |
| Hood River Capital Management Llc | $54,988.00 | 3.75% | 2.55M | -13,334 | -0.52% | 2025-09-30 |
| Paradice Investment Management Llc | $47,334.00 | 3.23% | 2.2M | +429,289 | +24.29% | 2025-09-30 |
| Freestone Grove Partners Lp | $40,305.00 | 2.75% | 1.87M | +2M | New | 2025-09-30 |
| Geode Capital Management, Llc | $34,443.00 | 2.35% | 1.6M | -8,055 | -0.5% | 2025-09-30 |