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 2025
Institutional positions in Tandem Diabetes Care Inc as of Jun 30, 2025. 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
- 271
- −2 vs. Q1 2025
- Shares held
- 81.0M
- +7.96M (+10.9%) vs. Q1 2025
- Total value
- $1.51B
- +$107.8M (+7.7%) vs. Q1 2025
- New holders
- 40
- 117 more added
- Sold out
- 42
- 71 more reduced
2 institutions that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2025: 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 2025
Shares, value and share of portfolio for each institution holding Tandem Diabetes Care Inc; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Russell Investments Group, Ltd. | 198,713 | $3.70M | 0.00% | +59,619+42.9% | Added |
| Schonfeld Strategic Advisors LLC | 199,756 | $3.72M | 0.03% | +199,756 | New |
| Soleus Capital Management, L.P. | 200,000 | $3.73M | 0.26% | −296,039−59.7% | Reduced |
| Bank of Montreal | 210,332 | $3.92M | 0.00% | +198,942+1,746.6% | Added |
| Sector Gamma AS | 210,523 | $3.92M | 1.28% | +30,000+16.6% | Added |
| Verition Fund Management LLC | 218,586 | $4.07M | 0.02% | +188,668+630.6% | Added |
| Invesco Ltd. | 226,789 | $4.23M | 0.00% | −10,333−4.4% | Reduced |
| Public Sector Pension Investment Board | 227,104 | $4.23M | 0.02% | +18,873+9.1% | Added |
| Balyasny Asset Management LLC | 230,934 | $4.30M | 0.01% | −538,809−70.0% | Reduced |
| Susquehanna Portfolio Strategies, LLC | 246,989 | $4.60M | 0.10% | +246,989 | New |
| Adage Capital Partners GP, L.L.C. | 250,000 | $4.66M | 0.01% | +250,000 | New |
| Lisanti Capital Growth, LLC | 253,840 | $4.73M | 1.31% | +253,840 | New |
| Susquehanna International Group, LLP | 257,459 | $4.80M | 0.01% | +75,208+41.3% | Added |
| Capital Fund Management S.A. | 262,431 | $4.89M | 0.05% | +223,574+575.4% | Added |
| Edmond de Rothschild Holding S.A. | 262,600 | $4.89M | 0.08% | +10,000+4.0% | Added |
| UBS Asset Management Americas Inc | 268,903 | $5.01M | 0.00% | +74,910+38.6% | Added |
| Alliancebernstein L.P. | 270,339 | $5.04M | 0.00% | +89,631+49.6% | Added |
| Envestnet Asset Management Inc | 278,010 | $5.18M | 0.00% | −40,520−12.7% | Reduced |
| DAFNA Capital Management LLC | 294,208 | $5.48M | 1.51% | 00.0% | Unchanged |
| Tudor Investment Corp Et Al | 311,517 | $5.81M | 0.04% | −93,775−23.1% | Reduced |
| Quantinno Capital Management LP | 319,659 | $5.96M | 0.03% | +77,828+32.2% | Added |
| D. E. Shaw & Co., Inc. | 338,668 | $6.31M | 0.01% | +338,668 | New |
| Renaissance Technologies LLC | 342,327 | $6.38M | 0.01% | +56,200+19.6% | Added |
| Silvercrest Asset Management Group LLC | 346,160 | $6.45M | 0.04% | +650.0% | Added |
| Citadel Advisors LLC | 352,959 | $6.58M | 0.01% | +238,925+209.5% | Added |
| Standard Life Aberdeen plc | 356,218 | $6.64M | 0.01% | 00.0% | Unchanged |
| Acadian Asset Management LLC | 358,516 | $6.68M | 0.01% | +125,644+54.0% | Added |
| BNP Paribas Arbitrage, SA | 361,878 | $6.75M | 0.01% | −97,920−21.3% | Reduced |
| Frontier Capital Management Co LLC | 364,098 | $6.79M | 0.06% | −1,078−0.3% | Reduced |
| Trexquant Investment LP | 368,530 | $6.87M | 0.08% | +368,530 | New |
| Principal Financial Group Inc | 395,226 | $7.37M | 0.00% | −4,224−1.1% | Reduced |
| Bank of New York Mellon Corp | 399,003 | $7.44M | 0.00% | −8,479−2.1% | Reduced |
| Prudential Financial Inc | 382,804 | $7.70M | 0.01% | +210,740+122.5% | Added |
| ExodusPoint Capital Management, LP | 417,308 | $7.78M | 0.09% | +401,322+2,510.5% | Added |
| Ameriprise Financial Inc | 419,037 | $7.81M | 0.00% | +31,150+8.0% | Added |
| FMR LLC | 524,675 | $9.78M | 0.00% | −912,401−63.5% | Reduced |
| Algert Global LLC | 530,914 | $9.90M | 0.21% | +321,594+153.6% | Added |
| Bank of America Corp | 545,504 | $10.2M | 0.00% | +78,774+16.9% | Added |
| Royal Bank of Canada | 549,542 | $10.2M | 0.00% | +337,876+159.6% | Added |
| Brown Capital Management LLC | 551,207 | $10.3M | 0.30% | −39,807−6.7% | Reduced |
| JPMorgan Chase & Co | 562,254 | $10.5M | 0.00% | +328,489+140.5% | Added |
| Barclays PLC | 567,072 | $10.6M | 0.00% | +53,066+10.3% | Added |
| Walleye Capital LLC | 567,223 | $10.6M | 0.10% | +567,223 | New |
| Charles Schwab Investment Management Inc | 617,000 | $11.5M | 0.00% | +46,850+8.2% | Added |
| Nuveen, LLC | 628,497 | $11.7M | 0.00% | +320,182+103.8% | Added |
| Fred Alger Management, LLC | 667,345 | $12.4M | 0.06% | −786,894−54.1% | Reduced |
| Northern Trust Corp | 700,381 | $13.1M | 0.00% | +10,847+1.6% | Added |
| Capital World Investors | 767,000 | $14.3M | 0.00% | 00.0% | Unchanged |
| Connor, Clark & Lunn Investment Management Ltd. | 784,218 | $14.6M | 0.05% | +139,230+21.6% | Added |
| Two Sigma Advisers, LP | 888,083 | $16.6M | 0.03% | +208,500+30.7% | Added |
| Millennium Management LLC | 969,073 | $18.1M | 0.02% | +741,488+325.8% | Added |
| Brown Advisory Inc | 1,057,115 | $19.7M | 0.03% | +131,805+14.2% | Added |
| Baillie Gifford & Co | 1,125,728 | $21.0M | 0.02% | +393,154+53.7% | Added |
| Two Sigma Investments, LP | 1,232,727 | $23.0M | 0.04% | +591,285+92.2% | Added |
| Morgan Stanley | 1,265,534 | $23.6M | 0.00% | +334,565+35.9% | Added |
| Ophir Asset Management Pty Ltd | 1,464,956 | $24.4M | 3.88% | +1,464,956 | New |
| UBS Group AG | 1,383,944 | $25.8M | 0.01% | +548,252+65.6% | Added |
| Jacobs Levy Equity Management, Inc | 1,431,307 | $26.7M | 0.10% | −40,262−2.7% | Reduced |
| Champlain Investment Partners, LLC | 1,455,123 | $27.1M | 0.19% | +86,235+6.3% | Added |
| Geode Capital Management, LLC | 1,606,336 | $29.9M | 0.00% | +49,126+3.2% | Added |
| Jennison Associates LLC | 1,658,942 | $30.9M | 0.02% | +181,834+12.3% | Added |
| Stephens Investment Management Group LLC | 1,737,769 | $32.4M | 0.43% | +30,854+1.8% | Added |
| Paradice Investment Management LLC | 1,767,179 | $32.9M | 6.69% | +117,272+7.1% | Added |
| Goldman Sachs Group Inc | 1,886,475 | $35.2M | 0.01% | +1,173,916+164.7% | Added |
| Hood River Capital Management LLC | 2,564,978 | $47.8M | 0.67% | +252,934+10.9% | Added |
| State Street Corp | 2,645,889 | $49.3M | 0.00% | −41,850−1.6% | Reduced |
| ArrowMark Colorado Holdings LLC | 2,699,549 | $50.3M | 0.91% | −16,783−0.6% | Reduced |
| GW&K Investment Management, LLC | 2,890,130 | $53.9M | 0.48% | +26,143+0.9% | Added |
| Sessa Capital IM, L.P. | 5,000,000 | $93.2M | 2.84% | +533,693+11.9% | Added |
| Vanguard Group Inc | 7,369,830 | $137.4M | 0.00% | +77,661+1.1% | Added |
| BlackRock, Inc. | 10,871,558 | $202.6M | 0.00% | −157,154−1.4% | Reduced |
| Park West Asset Management LLC | 0 | $0 | 0.00% | −1,123,052−100.0% | Sold out |
| Kingdon Capital Management, L.L.C. | 0 | $0 | 0.00% | −495,229−100.0% | Sold out |
| First Light Asset Management, LLC | 0 | $0 | 0.00% | −245,257−100.0% | Sold out |
| iA Global Asset Management Inc. | 0 | $0 | 0.00% | −165,380−100.0% | Sold out |
| Polar Capital Holdings Plc | 0 | $0 | 0.00% | −140,536−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −130,595−100.0% | Sold out |
| Jupiter Asset Management Ltd | 0 | $0 | 0.00% | −87,815−100.0% | Sold out |
| Mangrove Partners | 0 | $0 | 0.00% | −82,428−100.0% | Sold out |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −70,399−100.0% | Sold out |
| Hussman Strategic Advisors, Inc. | 0 | $0 | 0.00% | −63,000−100.0% | Sold out |
| Semanteon Capital Management, LP | 0 | $0 | 0.00% | −55,413−100.0% | Sold out |
| JB Capital LLC | 0 | $0 | 0.00% | −51,778−100.0% | Sold out |
| First Trust Advisors LP | 0 | $0 | 0.00% | −39,876−100.0% | Sold out |
| Janney Montgomery Scott LLC | 0 | $0 | 0.00% | −38,450−100.0% | Sold out |
| Prelude Capital Management, LLC | 0 | $0 | 0.00% | −38,159−100.0% | Sold out |
| Landscape Capital Management, L.L.C. | 0 | $0 | 0.00% | −35,942−100.0% | Sold out |
| Corebridge Financial, Inc. | 0 | $0 | 0.00% | −34,290−100.0% | Sold out |
| Versor Investments LP | 0 | $0 | 0.00% | −30,500−100.0% | Sold out |
| Wiley Bros.-Aintree Capital, LLC | 0 | $0 | 0.00% | −23,142−100.0% | Sold out |
| Scientech Research LLC | 0 | $0 | 0.00% | −23,372−100.0% | Sold out |
| Chicago Capital, LLC | 0 | $0 | 0.00% | −20,726−100.0% | Sold out |
| Counterpoint Mutual Funds LLC | 0 | $0 | 0.00% | −18,963−100.0% | Sold out |
| CIBC World Markets Corp | 0 | $0 | 0.00% | −14,571−100.0% | Sold out |
| Atria Investments LLC | 0 | $0 | 0.00% | −11,569−100.0% | Sold out |
| Wolverine Trading, LLC | 0 | $0 | 0.00% | −10,973−100.0% | Sold out |
| Allianz Asset Management GmbH | 0 | $0 | 0.00% | −10,700−100.0% | Sold out |
| MML Investors Services, LLC | 0 | $0 | 0.00% | −10,718−100.0% | Sold out |
| MN Wealth Advisors, LLC | 0 | $0 | 0.00% | −10,623−100.0% | Sold out |
| Axq Capital, LP | 0 | $0 | 0.00% | −10,098−100.0% | Sold out |