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 |
|---|---|---|---|---|---|
| BlackRock, Inc. | 10,871,558 | $202.6M | 0.00% | −157,154−1.4% | Reduced |
| Vanguard Group Inc | 7,369,830 | $137.4M | 0.00% | +77,661+1.1% | Added |
| Sessa Capital IM, L.P. | 5,000,000 | $93.2M | 2.84% | +533,693+11.9% | Added |
| GW&K Investment Management, LLC | 2,890,130 | $53.9M | 0.48% | +26,143+0.9% | Added |
| ArrowMark Colorado Holdings LLC | 2,699,549 | $50.3M | 0.91% | −16,783−0.6% | Reduced |
| State Street Corp | 2,645,889 | $49.3M | 0.00% | −41,850−1.6% | Reduced |
| Hood River Capital Management LLC | 2,564,978 | $47.8M | 0.67% | +252,934+10.9% | Added |
| Goldman Sachs Group Inc | 1,886,475 | $35.2M | 0.01% | +1,173,916+164.7% | Added |
| Paradice Investment Management LLC | 1,767,179 | $32.9M | 6.69% | +117,272+7.1% | Added |
| Stephens Investment Management Group LLC | 1,737,769 | $32.4M | 0.43% | +30,854+1.8% | Added |
| Jennison Associates LLC | 1,658,942 | $30.9M | 0.02% | +181,834+12.3% | Added |
| Geode Capital Management, LLC | 1,606,336 | $29.9M | 0.00% | +49,126+3.2% | Added |
| Champlain Investment Partners, LLC | 1,455,123 | $27.1M | 0.19% | +86,235+6.3% | Added |
| Jacobs Levy Equity Management, Inc | 1,431,307 | $26.7M | 0.10% | −40,262−2.7% | Reduced |
| UBS Group AG | 1,383,944 | $25.8M | 0.01% | +548,252+65.6% | Added |
| Ophir Asset Management Pty Ltd | 1,464,956 | $24.4M | 3.88% | +1,464,956 | New |
| Morgan Stanley | 1,265,534 | $23.6M | 0.00% | +334,565+35.9% | Added |
| Two Sigma Investments, LP | 1,232,727 | $23.0M | 0.04% | +591,285+92.2% | Added |
| Baillie Gifford & Co | 1,125,728 | $21.0M | 0.02% | +393,154+53.7% | Added |
| Brown Advisory Inc | 1,057,115 | $19.7M | 0.03% | +131,805+14.2% | Added |
| Millennium Management LLC | 969,073 | $18.1M | 0.02% | +741,488+325.8% | Added |
| Two Sigma Advisers, LP | 888,083 | $16.6M | 0.03% | +208,500+30.7% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 784,218 | $14.6M | 0.05% | +139,230+21.6% | Added |
| Capital World Investors | 767,000 | $14.3M | 0.00% | 00.0% | Unchanged |
| Northern Trust Corp | 700,381 | $13.1M | 0.00% | +10,847+1.6% | Added |
| Fred Alger Management, LLC | 667,345 | $12.4M | 0.06% | −786,894−54.1% | Reduced |
| Nuveen, LLC | 628,497 | $11.7M | 0.00% | +320,182+103.8% | Added |
| Charles Schwab Investment Management Inc | 617,000 | $11.5M | 0.00% | +46,850+8.2% | Added |
| Walleye Capital LLC | 567,223 | $10.6M | 0.10% | +567,223 | New |
| Barclays PLC | 567,072 | $10.6M | 0.00% | +53,066+10.3% | Added |
| JPMorgan Chase & Co | 562,254 | $10.5M | 0.00% | +328,489+140.5% | Added |
| Brown Capital Management LLC | 551,207 | $10.3M | 0.30% | −39,807−6.7% | Reduced |
| Royal Bank of Canada | 549,542 | $10.2M | 0.00% | +337,876+159.6% | Added |
| Bank of America Corp | 545,504 | $10.2M | 0.00% | +78,774+16.9% | Added |
| Algert Global LLC | 530,914 | $9.90M | 0.21% | +321,594+153.6% | Added |
| FMR LLC | 524,675 | $9.78M | 0.00% | −912,401−63.5% | Reduced |
| Ameriprise Financial Inc | 419,037 | $7.81M | 0.00% | +31,150+8.0% | Added |
| ExodusPoint Capital Management, LP | 417,308 | $7.78M | 0.09% | +401,322+2,510.5% | Added |
| Prudential Financial Inc | 382,804 | $7.70M | 0.01% | +210,740+122.5% | Added |
| Bank of New York Mellon Corp | 399,003 | $7.44M | 0.00% | −8,479−2.1% | Reduced |
| Principal Financial Group Inc | 395,226 | $7.37M | 0.00% | −4,224−1.1% | Reduced |
| Trexquant Investment LP | 368,530 | $6.87M | 0.08% | +368,530 | New |
| Frontier Capital Management Co LLC | 364,098 | $6.79M | 0.06% | −1,078−0.3% | Reduced |
| BNP Paribas Arbitrage, SA | 361,878 | $6.75M | 0.01% | −97,920−21.3% | Reduced |
| Acadian Asset Management LLC | 358,516 | $6.68M | 0.01% | +125,644+54.0% | Added |
| Standard Life Aberdeen plc | 356,218 | $6.64M | 0.01% | 00.0% | Unchanged |
| Citadel Advisors LLC | 352,959 | $6.58M | 0.01% | +238,925+209.5% | Added |
| Silvercrest Asset Management Group LLC | 346,160 | $6.45M | 0.04% | +650.0% | Added |
| Renaissance Technologies LLC | 342,327 | $6.38M | 0.01% | +56,200+19.6% | Added |
| D. E. Shaw & Co., Inc. | 338,668 | $6.31M | 0.01% | +338,668 | New |
| Quantinno Capital Management LP | 319,659 | $5.96M | 0.03% | +77,828+32.2% | Added |
| Tudor Investment Corp Et Al | 311,517 | $5.81M | 0.04% | −93,775−23.1% | Reduced |
| DAFNA Capital Management LLC | 294,208 | $5.48M | 1.51% | 00.0% | Unchanged |
| Envestnet Asset Management Inc | 278,010 | $5.18M | 0.00% | −40,520−12.7% | Reduced |
| Alliancebernstein L.P. | 270,339 | $5.04M | 0.00% | +89,631+49.6% | Added |
| UBS Asset Management Americas Inc | 268,903 | $5.01M | 0.00% | +74,910+38.6% | Added |
| Edmond de Rothschild Holding S.A. | 262,600 | $4.89M | 0.08% | +10,000+4.0% | Added |
| Capital Fund Management S.A. | 262,431 | $4.89M | 0.05% | +223,574+575.4% | Added |
| Susquehanna International Group, LLP | 257,459 | $4.80M | 0.01% | +75,208+41.3% | Added |
| Lisanti Capital Growth, LLC | 253,840 | $4.73M | 1.31% | +253,840 | New |
| Adage Capital Partners GP, L.L.C. | 250,000 | $4.66M | 0.01% | +250,000 | New |
| Susquehanna Portfolio Strategies, LLC | 246,989 | $4.60M | 0.10% | +246,989 | New |
| Balyasny Asset Management LLC | 230,934 | $4.30M | 0.01% | −538,809−70.0% | Reduced |
| Public Sector Pension Investment Board | 227,104 | $4.23M | 0.02% | +18,873+9.1% | Added |
| Invesco Ltd. | 226,789 | $4.23M | 0.00% | −10,333−4.4% | Reduced |
| Verition Fund Management LLC | 218,586 | $4.07M | 0.02% | +188,668+630.6% | Added |
| Sector Gamma AS | 210,523 | $3.92M | 1.28% | +30,000+16.6% | Added |
| Bank of Montreal | 210,332 | $3.92M | 0.00% | +198,942+1,746.6% | Added |
| Soleus Capital Management, L.P. | 200,000 | $3.73M | 0.26% | −296,039−59.7% | Reduced |
| Schonfeld Strategic Advisors LLC | 199,756 | $3.72M | 0.03% | +199,756 | New |
| Russell Investments Group, Ltd. | 198,713 | $3.70M | 0.00% | +59,619+42.9% | Added |
| New York State Common Retirement Fund | 197,775 | $3.69M | 0.00% | 00.0% | Unchanged |
| Rhumbline Advisers | 193,219 | $3.60M | 0.00% | +14,945+8.4% | Added |
| KBC Group NV | 191,837 | $3.58M | 0.01% | −1,971−1.0% | Reduced |
| FIL Ltd | 191,417 | $3.57M | 0.00% | −1,077−0.6% | Reduced |
| 1492 Capital Management LLC | 188,754 | $3.52M | 1.62% | +166,308+740.9% | Added |
| SEI Investments Co | 186,731 | $3.48M | 0.00% | +62,375+50.2% | Added |
| Legal & General Group Plc | 184,853 | $3.45M | 0.00% | +7,866+4.4% | Added |
| Squarepoint Ops LLC | 180,660 | $3.37M | 0.01% | +56,777+45.8% | Added |
| Divisadero Street Capital Management, LP | 174,692 | $3.26M | 0.22% | 00.0% | Unchanged |
| Engineers Gate Manager LP | 170,488 | $3.18M | 0.04% | −20,417−10.7% | Reduced |
| PDT Partners, LLC | 170,420 | $3.18M | 0.18% | +170,420 | New |
| Jump Financial, LLC | 162,950 | $3.04M | 0.04% | +162,950 | New |
| Aquatic Capital Management LLC | 162,030 | $3.02M | 0.06% | +139,382+615.4% | Added |
| State of Wisconsin Investment Board | 160,619 | $2.99M | 0.01% | +4,407+2.8% | Added |
| Raymond James Financial Inc | 143,274 | $2.67M | 0.00% | −43,354−23.2% | Reduced |
| Mizuho Markets Americas LLC | 138,742 | $2.59M | 0.09% | +22,970+19.8% | Added |
| Voya Investment Management LLC | 137,749 | $2.57M | 0.00% | +1,051+0.8% | Added |
| Swiss National Bank | 127,300 | $2.37M | 0.00% | 00.0% | Unchanged |
| Truist Financial Corp | 123,531 | $2.30M | 0.00% | −15,016−10.8% | Reduced |
| Formula Growth Ltd | 122,096 | $2.28M | 0.86% | −1,849−1.5% | Reduced |
| HighTower Advisors, LLC | 121,460 | $2.26M | 0.00% | +54,292+80.8% | Added |
| Kennedy Capital Management, Inc. | 117,702 | $2.19M | 0.05% | −69,441−37.1% | Reduced |
| Rice Hall James & Associates, LLC | 103,954 | $1.94M | 0.10% | −1,002−1.0% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 101,346 | $1.89M | 0.00% | +13,523+15.4% | Added |
| Brevan Howard Capital Management LP | 94,734 | $1.77M | 0.02% | +83,955+778.9% | Added |
| Jane Street Group, LLC | 90,108 | $1.68M | 0.00% | +90,108 | New |
| Citigroup Inc | 87,125 | $1.62M | 0.00% | −14,064−13.9% | Reduced |
| Banque Pictet & Cie SA | 84,028 | $1.57M | 0.02% | +84,028 | New |
| Gotham Asset Management, LLC | 82,432 | $1.54M | 0.01% | +13,803+20.1% | Added |