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 2026
Institutional positions in Tandem Diabetes Care Inc as of Jun 30, 2026. 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
- 274
- +3 vs. Q1 2026
- Shares held
- 78.7M
- +94.9K (+0.1%) vs. Q1 2026
- Total value
- $1.19B
- −$319.1M (−21.2%) vs. Q1 2026
- New holders
- 48
- 95 more added
- Sold out
- 45
- 91 more reduced
3 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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 2026
Shares, value and share of portfolio for each institution holding Tandem Diabetes Care Inc; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 11,583,125 | $174.8M | 0.00% | +892,281+8.3% | Added |
| Sessa Capital IM, L.P. | 5,100,000 | $77.0M | 1.33% | +369,243+7.8% | Added |
| Vanguard Portfolio Management LLC | 4,299,667 | $64.9M | 0.00% | +306,334+7.7% | Added |
| First Light Asset Management, LLC | 3,383,553 | $51.1M | 3.10% | +2,068,838+157.4% | Added |
| Vanguard Capital Management LLC | 3,096,536 | $46.7M | 0.00% | +57,617+1.9% | Added |
| State Street Corp | 2,851,646 | $43.0M | 0.00% | +189,386+7.1% | Added |
| GW&K Investment Management, LLC | 2,569,032 | $38.8M | 0.30% | −120,074−4.5% | Reduced |
| Jennison Associates LLC | 2,331,429 | $35.2M | 0.02% | +672,981+40.6% | Added |
| Paradice Investment Management LLC | 2,024,014 | $30.5M | 4.87% | −18,411−0.9% | Reduced |
| Jacobs Levy Equity Management, Inc | 2,006,429 | $30.3M | 0.11% | +482,483+31.7% | Added |
| Freestone Grove Partners LP | 1,866,134 | $28.2M | 0.18% | +535,392+40.2% | Added |
| Geode Capital Management, LLC | 1,800,797 | $27.2M | 0.00% | +120,934+7.2% | Added |
| Driehaus Capital Management LLC | 1,786,996 | $27.0M | 0.16% | −517,418−22.5% | Reduced |
| Citadel Advisors LLC | 1,735,879 | $26.2M | 0.02% | −456,788−20.8% | Reduced |
| Millennium Management LLC | 1,311,739 | $19.8M | 0.01% | +550,067+72.2% | Added |
| Woodline Partners LP | 1,307,439 | $19.7M | 0.06% | +1,307,439 | New |
| ArrowMark Colorado Holdings LLC | 1,299,586 | $19.6M | 0.82% | −1,804,023−58.1% | Reduced |
| UBS Group AG | 1,146,580 | $17.3M | 0.00% | −901,221−44.0% | Reduced |
| FMR LLC | 976,432 | $14.7M | 0.00% | +262,421+36.8% | Added |
| Royce & Associates LP | 900,590 | $13.6M | 0.11% | +204,000+29.3% | Added |
| Wellington Management Group LLP | 871,811 | $13.2M | 0.00% | −170,953−16.4% | Reduced |
| Goldman Sachs Group Inc | 862,301 | $13.0M | 0.00% | −1,356,621−61.1% | Reduced |
| Northern Trust Corp | 753,690 | $11.4M | 0.00% | +47,081+6.7% | Added |
| Verition Fund Management LLC | 700,000 | $10.6M | 0.07% | +592,881+553.5% | Added |
| ExodusPoint Capital Management, LP | 691,789 | $10.4M | 0.10% | +58,890+9.3% | Added |
| Qube Research & Technologies Ltd | 683,823 | $10.3M | 0.01% | +631,862+1,216.0% | Added |
| D. E. Shaw & Co., Inc. | 681,808 | $10.3M | 0.01% | −102,098−13.0% | Reduced |
| Arrowstreet Capital, Limited Partnership | 667,689 | $10.1M | 0.00% | +474,133+245.0% | Added |
| Charles Schwab Investment Management Inc | 656,836 | $9.91M | 0.00% | +14,238+2.2% | Added |
| Morgan Stanley | 647,069 | $9.76M | 0.00% | −710,473−52.3% | Reduced |
| Point72 Asset Management, L.P. | 610,903 | $9.22M | 0.01% | +190,425+45.3% | Added |
| Soleus Capital Management, L.P. | 575,000 | $8.68M | 0.30% | −208,000−26.6% | Reduced |
| Bank of Montreal | 564,966 | $8.53M | 0.00% | +527,531+1,409.2% | Added |
| Two Sigma Investments, LP | 558,409 | $8.43M | 0.01% | −1,305,785−70.0% | Reduced |
| AQR Capital Management LLC | 533,837 | $8.06M | 0.00% | +201,921+60.8% | Added |
| Vanguard Fiduciary Trust Co | 491,103 | $7.41M | 0.00% | +19,445+4.1% | Added |
| Standard Life Aberdeen plc | 441,738 | $6.67M | 0.01% | +7,711+1.8% | Added |
| Jump Financial, LLC | 404,400 | $6.10M | 0.05% | +404,400 | New |
| Bank of America Corp | 395,054 | $5.96M | 0.00% | +21,830+5.8% | Added |
| Frontier Capital Management Co LLC | 380,458 | $5.74M | 0.05% | −16,751−4.2% | Reduced |
| JPMorgan Chase & Co | 349,652 | $5.53M | 0.00% | −1400.0% | Reduced |
| Tudor Investment Corp Et Al | 362,708 | $5.47M | 0.02% | +283,709+359.1% | Added |
| DAFNA Capital Management LLC | 355,208 | $5.36M | 1.02% | 00.0% | Unchanged |
| Bank of New York Mellon Corp | 352,161 | $5.31M | 0.00% | +15,870+4.7% | Added |
| Barclays PLC | 350,429 | $5.29M | 0.00% | −70,807−16.8% | Reduced |
| Principal Financial Group Inc | 335,094 | $5.06M | 0.00% | +3,553+1.1% | Added |
| Invesco Ltd. | 321,128 | $4.85M | 0.00% | +27,076+9.2% | Added |
| Y-Intercept (Hong Kong) Ltd | 314,653 | $4.75M | 0.09% | +236,774+304.0% | Added |
| Alberta Investment Management Corp | 313,700 | $4.73M | 0.03% | +313,700 | New |
| Edmond de Rothschild Holding S.A. | 308,200 | $4.65M | 0.06% | +50,000+19.4% | Added |
| Quantinno Capital Management LP | 306,660 | $4.63M | 0.01% | −347,210−53.1% | Reduced |
| KVP Capital Advisors, LP | 301,000 | $4.54M | 3.33% | +301,000 | New |
| Meridiem Capital Partners LP | 298,255 | $4.50M | 0.21% | +298,255 | New |
| First Trust Advisors LP | 292,844 | $4.42M | 0.00% | −49,863−14.5% | Reduced |
| Holocene Advisors, LP | 267,860 | $4.04M | 0.01% | −209,499−43.9% | Reduced |
| Sector Gamma AS | 267,091 | $4.03M | 0.87% | 00.0% | Unchanged |
| Beaconlight Capital, LLC | 266,009 | $4.01M | 1.77% | +12,132+4.8% | Added |
| Envestnet Asset Management Inc | 235,966 | $3.56M | 0.00% | −7,282−3.0% | Reduced |
| Algert Global LLC | 235,739 | $3.56M | 0.04% | +117,940+100.1% | Added |
| Public Sector Pension Investment Board | 235,458 | $3.55M | 0.01% | −7,138−2.9% | Reduced |
| Royal Bank of Canada | 225,174 | $3.40M | 0.00% | +19,141+9.3% | Added |
| Squarepoint Ops LLC | 217,386 | $3.28M | 0.01% | +217,386 | New |
| XTX Topco Ltd | 212,976 | $3.21M | 0.04% | +152,155+250.2% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 184,073 | $2.78M | 0.01% | +184,073 | New |
| Jefferies Financial Group Inc. | 166,489 | $2.51M | 0.02% | +109,767+193.5% | Added |
| Rhumbline Advisers | 164,053 | $2.48M | 0.00% | −22,263−11.9% | Reduced |
| Nierenberg Investment Management Company, Inc. | 158,910 | $2.40M | 1.19% | +79,400+99.9% | Added |
| Nuveen, LLC | 157,066 | $2.37M | 0.00% | −206,736−56.8% | Reduced |
| Legal & General Group Plc | 155,749 | $2.35M | 0.00% | +461+0.3% | Added |
| UBS Asset Management Americas Inc | 151,847 | $2.29M | 0.00% | −16,646−9.9% | Reduced |
| Russell Investments Group, Ltd. | 148,584 | $2.24M | 0.00% | +14,988+11.2% | Added |
| Banco Santander, S.A. | 147,200 | $2.22M | 0.01% | +133,500+974.5% | Added |
| Voya Investment Management LLC | 142,597 | $2.15M | 0.00% | −661,540−82.3% | Reduced |
| Mizuho Markets Americas LLC | 137,762 | $2.08M | 0.04% | −19,600−12.5% | Reduced |
| Swiss National Bank | 137,500 | $2.07M | 0.00% | +4,200+3.2% | Added |
| Acadian Asset Management LLC | 137,237 | $2.06M | 0.00% | −140,879−50.7% | Reduced |
| Schonfeld Strategic Advisors LLC | 129,567 | $1.96M | 0.01% | +129,567 | New |
| Federated Hermes, Inc. | 123,819 | $1.87M | 0.00% | 00.0% | Unchanged |
| Raymond James Financial Inc | 122,021 | $1.84M | 0.00% | −3,324−2.7% | Reduced |
| Susquehanna International Group, LLP | 117,958 | $1.78M | 0.00% | +37,209+46.1% | Added |
| Ameriprise Financial Inc | 113,522 | $1.71M | 0.00% | −7,628−6.3% | Reduced |
| Banque Pictet & Cie SA | 112,335 | $1.70M | 0.02% | −11,600−9.4% | Reduced |
| Gabelli Funds LLC | 103,000 | $1.55M | 0.01% | +78,000+312.0% | Added |
| Trexquant Investment LP | 90,058 | $1.36M | 0.01% | −159,240−63.9% | Reduced |
| Alliancebernstein L.P. | 70,049 | $1.34M | 0.00% | −3,100−4.2% | Reduced |
| Price T Rowe Associates Inc | 88,316 | $1.33M | 0.00% | +19,655+28.6% | Added |
| Cinctive Capital Management LP | 86,906 | $1.31M | 0.05% | +23,094+36.2% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 84,904 | $1.28M | 0.00% | −2,453−2.8% | Reduced |
| Fideuram - Intesa Sanpaolo Private Banking S.P.A. | 84,862 | $1.28M | 0.04% | +84,862 | New |
| Intech Investment Management LLC | 81,071 | $1.22M | 0.01% | −30,350−27.2% | Reduced |
| California State Teachers Retirement System | 77,227 | $1.17M | 0.00% | −7,028−8.3% | Reduced |
| Cerity Partners LLC | 76,122 | $1.15M | 0.00% | −106−0.1% | Reduced |
| Deutsche Bank AG | 75,155 | $1.13M | 0.00% | +14,526+24.0% | Added |
| Wells Fargo & Company | 72,181 | $1.09M | 0.00% | +40,651+128.9% | Added |
| Jones Financial Companies LLLP | 66,267 | $1.08M | 0.00% | +7,879+13.5% | Added |
| Prudential Financial Inc | 70,474 | $1.06M | 0.00% | +1,070+1.5% | Added |
| Formula Growth Ltd | 70,304 | $1.06M | 0.37% | −524−0.7% | Reduced |
| Susquehanna Portfolio Strategies, LLC | 68,897 | $1.04M | 0.02% | −137,296−66.6% | Reduced |
| New York State Teachers Retirement System | 68,300 | $1.03M | 0.00% | +2,204+3.3% | Added |
| Stifel Financial Corp | 68,185 | $1.03M | 0.00% | +41,241+153.1% | Added |