Tandem Diabetes Care Inc
TNDM- Exchange
- Nasdaq
- Industry
- Surgical & Medical Instruments & Apparatus
- SEC CIK
- 0001438133
No open-market purchases or sales by Tandem Diabetes Care Inc insiders were filed in the last 90 days; 274 institutions reported holding it in 13F filings for Q2 2026, worth $1.19B in total; no superinvestor holds it.
13F holders, Q2 2021
Institutional positions in Tandem Diabetes Care Inc as of Jun 30, 2021. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 303
- +15 vs. Q1 2021
- Shares held
- 59.0M
- +2.42M (+4.3%) vs. Q1 2021
- Total value
- $5.75B
- +$753.7M (+15.1%) vs. Q1 2021
- New holders
- 56
- 109 more added
- Sold out
- 41
- 94 more reduced
2 institutions that held it in Q1 2021 haven't filed for Q2 2021 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2021: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting TNDM on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 274 | $1.19B |
| Q1 2026 | 274 | $1.51B |
| Q4 2025 | 269 | $1.65B |
| Q3 2025 | 255 | $911.3M |
| Q2 2025 | 271 | $1.51B |
| Q1 2025 | 275 | $1.40B |
| Q4 2024 | 316 | $2.60B |
| Q3 2024 | 332 | $3.10B |
| Q2 2024 | 317 | $2.96B |
| Q1 2024 | 291 | $2.63B |
| Q4 2023 | 268 | $2.10B |
| Q3 2023 | 226 | $1.45B |
| Q2 2023 | 247 | $1.65B |
| Q1 2023 | 274 | $2.77B |
| Q4 2022 | 295 | $2.89B |
| Q3 2022 | 299 | $3.00B |
| Q2 2022 | 331 | $3.64B |
| Q1 2022 | 379 | $6.92B |
| Q4 2021 | 388 | $9.09B |
| Q3 2021 | 338 | $7.32B |
| Q2 2021 | 303 | $5.75B |
| Q1 2021 | 290 | $5.08B |
Institutions, Q2 2021
Shares, value and share of portfolio for each institution holding Tandem Diabetes Care Inc; share changes are against Q1 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Jackson Square Partners, LLC | 3,623,094 | $352.9M | 2.02% | −82,718−2.2% | Reduced |
| Vanguard Group Inc | 5,604,505 | $545.9M | 0.01% | +144,143+2.6% | Added |
| FMR LLC | 5,994,645 | $583.9M | 0.05% | −125,531−2.1% | Reduced |
| Ardevora Asset Management LLP | 0 | $0 | 0.00% | −615,538−100.0% | Sold out |
| Armistice Capital, LLC | 0 | $0 | 0.00% | −100,000−100.0% | Sold out |
| Arrowstreet Capital, Limited Partnership | 0 | $0 | 0.00% | −98,162−100.0% | Sold out |
| Fuller & Thaler Asset Management, Inc. | 0 | $0 | 0.00% | −87,192−100.0% | Sold out |
| Westpac Banking Corp | 0 | $0 | 0.00% | −71,869−100.0% | Sold out |
| Voloridge Investment Management, LLC | 0 | $0 | 0.00% | −31,491−100.0% | Sold out |
| TD Asset Management Inc | 0 | $0 | 0.00% | −27,200−100.0% | Sold out |
| Hodges Capital Management Inc. | 0 | $0 | 0.00% | −15,790−100.0% | Sold out |
| Aviva PLC | 0 | $0 | 0.00% | −14,138−100.0% | Sold out |
| First Trust Advisors LP | 0 | $0 | 0.00% | −13,950−100.0% | Sold out |
| Voya Financial Advisors, Inc. | 0 | $0 | 0.00% | −11,893−100.0% | Sold out |
| AQR Capital Management LLC | 0 | $0 | 0.00% | −10,826−100.0% | Sold out |
| Comerica Bank | 0 | $0 | 0.00% | −8,903−100.0% | Sold out |
| Affinity Investment Advisors, LLC | 0 | $0 | 0.00% | −7,818−100.0% | Sold out |
| Ci Investments Inc. | 0 | $0 | 0.00% | −7,715−100.0% | Sold out |
| Wesbanco Bank Inc | 0 | $0 | 0.00% | −7,677−100.0% | Sold out |
| Highland Capital Management Fund Advisors, L.P. | 0 | $0 | 0.00% | −5,500−100.0% | Sold out |
| Vident Investment Advisory, LLC | 0 | $0 | 0.00% | −5,000−100.0% | Sold out |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −4,795−100.0% | Sold out |
| Resources Investment Advisors, LLC. | 0 | $0 | 0.00% | −4,792−100.0% | Sold out |
| Professional Financial Advisors, LLC | 0 | $0 | 0.00% | −4,189−100.0% | Sold out |
| First Hawaiian Bank | 0 | $0 | 0.00% | −3,990−100.0% | Sold out |
| Vontobel Holding Ltd. | 0 | $0 | 0.00% | −3,930−100.0% | Sold out |
| Shell Asset Management Co | 0 | $0 | 0.00% | −3,840−100.0% | Sold out |
| Marshall Wace North America L.P. | 0 | $0 | 0.00% | −3,643−100.0% | Sold out |
| Quantitative Systematic Strategies LLC | 0 | $0 | 0.00% | −3,456−100.0% | Sold out |
| Seven Eight Capital, LP | 0 | $0 | 0.00% | −3,114−100.0% | Sold out |
| Two Sigma Securities, LLC | 0 | $0 | 0.00% | −3,177−100.0% | Sold out |
| Retirement Group, LLC | 0 | $0 | 0.00% | −1,835−100.0% | Sold out |
| Brown Brothers Harriman & Co | 0 | $0 | 0.00% | −780−100.0% | Sold out |
| Neo Ivy Capital Management | 0 | $0 | 0.00% | −595−100.0% | Sold out |
| Manchester Financial Inc | 0 | $0 | 0.00% | −250−100.0% | Sold out |
| Wealthcare Advisory Partners LLC | 0 | $0 | 0.00% | −250−100.0% | Sold out |
| Parallax Volatility Advisers, L.P. | 0 | $0 | 0.00% | −232−100.0% | Sold out |
| Sowell Financial Services LLC | 0 | $0 | 0.00% | −174−100.0% | Sold out |
| Ameritas Investment Company, LLC | 0 | $0 | 0.00% | −100−100.0% | Sold out |
| Johnson Midwest Financial, LLC | 0 | $0 | 0.00% | −75−100.0% | Sold out |
| Grandview Asset Management LLC | 0 | $0 | 0.00% | −60−100.0% | Sold out |
| Toronto Dominion Bank | 0 | $0 | 0.00% | −23−100.0% | Sold out |
| International Assets Investment Management, LLC | 0 | $0 | 0.00% | −30−100.0% | Sold out |
| Total Clarity Wealth Management, Inc. | 0 | $0 | 0.00% | −15−100.0% | Sold out |
| Waddell & Reed Financial Inc | – | – | – | – | Not filed |
| Amundi Asset Management US, Inc. | – | – | – | – | Not filed |