TNDM — TANDEM DIABETES CARE INC
Price · 2024-08-26 → 2026-08-21
499 daily closes shownAnonymous view is capped at two years of history. A free account extends it to five, and Pro opens the whole archive back to 2017-10-10.
Performance
Technicals
Others in Healthcare
Measured signals that fired on TNDM
| date | signal | measured base rate |
|---|---|---|
| 2026-08-04 | Equal highs taken out structure | -0.70% over 21 days · t = -8.28 · n = 68,636 statistically distinguishable from its control group |
| 2026-08-03 | Fair value gap, bullish structure | -0.67% over 21 days · t = -6.43 · n = 111,973 statistically distinguishable from its control group |
| 2026-06-10 | Fair value gap, bearish structure | -0.45% over 21 days · t = -3.29 · n = 108,591 statistically distinguishable from its control group |
| 2026-05-01 | Fair value gap, bullish structure | -0.67% over 21 days · t = -6.43 · n = 111,973 statistically distinguishable from its control group |
| 2026-04-29 | Fair value gap, bearish structure | -0.45% over 21 days · t = -3.29 · n = 108,591 statistically distinguishable from its control group |
| 2026-03-27 | Fair value gap, bearish structure | -0.45% over 21 days · t = -3.29 · n = 108,591 statistically distinguishable from its control group |
Excess return against a matched control group, on a point-in-time universe that includes delisted companies. Most families do not survive that. How the measurement works →
Insider transactions (Form 4)
| date | insider | what | shares | price | value |
|---|---|---|---|---|---|
| 2026-08-15 | Sheridan John F PRESIDENT & CEO | Shares withheld for tax | 5.1K | 22.72 | 114.8K |
| 2026-08-15 | Sheridan John F PRESIDENT & CEO | Shares withheld for tax | 3.0K | 22.72 | 69.2K |
| 2026-08-15 | Gasser Elizabeth Anne EVP, Chief Strategy Officer | Shares withheld for tax | 1.0K | 22.72 | 23.4K |
| 2026-08-15 | Hansen Shannon Marie EVP & Chief Legal Officer | Shares withheld for tax | 976 | 22.72 | 22.2K |
| 2026-08-15 | Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER | Shares withheld for tax | 942 | 22.72 | 21.4K |
| 2026-08-15 | Carpenter Rick EVP & Chief Technology Officer | Shares withheld for tax | 820 | 22.72 | 18.6K |
| 2026-08-15 | Gasser Elizabeth Anne EVP, Chief Strategy Officer | Shares withheld for tax | 589 | 22.72 | 13.4K |
| 2026-08-15 | Hansen Shannon Marie EVP & Chief Legal Officer | Shares withheld for tax | 559 | 22.72 | 12.7K |
| 2026-08-15 | Vosseller Leigh EVP & CHIEF FINANCIAL OFFICER | Shares withheld for tax | 537 | 22.72 | 12.2K |
| 2026-08-15 | Kyrillos Jean-Claude EVP & Chief Operating Officer | Shares withheld for tax | 535 | 22.72 | 12.2K |
Open-market purchases (code P) are the informative ones. Grants, option exercises and tax withholding are compensation mechanics, not decisions. How to read a Form 4 →
Largest institutional holders
| manager | value | shares |
|---|---|---|
| BlackRock, Inc. | 204.9M | 10.7M |
| Sessa Capital IM, L.P. | 90.7M | 4.7M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 76.6M | 4.0M |
| ArrowMark Colorado Holdings LLC | 59.5M | 3.1M |
| VANGUARD CAPITAL MANAGEMENT LLC | 58.3M | 3.0M |
| STATE STREET CORP | 51.0M | 2.7M |
| Driehaus Capital Management LLC | 44.2M | 2.3M |
| GOLDMAN SACHS GROUP INC | 42.5M | 2.2M |
| CITADEL ADVISORS LLC | 42.0M | 2.2M |
| UBS Group AG | 39.3M | 2.0M |
13F positions as of 2026-03-31, filed up to 45 days after quarter end. Long-only US equity — shorts and derivatives never appear. What 13F does and does not show →
Latest SEC filings
| form | filed | period | |
|---|---|---|---|
| 4 | 2026-08-18 | 2026-08-15 | on EDGAR ↗ |
| 4 | 2026-08-18 | 2026-08-15 | on EDGAR ↗ |
| 4 | 2026-08-18 | 2026-08-15 | on EDGAR ↗ |
| 4 | 2026-08-18 | 2026-08-15 | on EDGAR ↗ |
| 4 | 2026-08-18 | 2026-08-15 | on EDGAR ↗ |
| 4 | 2026-08-18 | 2026-08-15 | on EDGAR ↗ |
| 4 | 2026-08-18 | 2026-08-15 | on EDGAR ↗ |
| 144 | 2026-08-18 | — | on EDGAR ↗ |
Short selling
This is off-exchange short volume, not short interest: it is flow, not position, and 40–50% is normal because market makers short to fill your buy. Why that number misleads →
Recent headlines
- TANDEM DIABETES CARE INC (TNDM) filed form 4 · 2026-08-18 · SEC EDGAR
- TANDEM DIABETES CARE INC (TNDM) filed form 4 · 2026-08-18 · SEC EDGAR
- TANDEM DIABETES CARE INC (TNDM) filed form 4 · 2026-08-18 · SEC EDGAR
- TANDEM DIABETES CARE INC (TNDM) filed form 4 · 2026-08-18 · SEC EDGAR
- TANDEM DIABETES CARE INC (TNDM) filed form 144 · 2026-08-18 · SEC EDGAR
- TANDEM DIABETES CARE INC (TNDM) filed form 4 · 2026-08-18 · SEC EDGAR
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